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DawidPietrykowski 2021-08-07 23:14:51 +02:00
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14
.gitignore vendored Normal file
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.vscode/.browse.c_cpp.db*
.vscode/c_cpp_properties.json
.vscode/launch.json
.vscode/ipch
.vscode
lib
include
test
packages
.vs
bin
obj
build
makeP.bat

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CMakeLists.txt Normal file
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cmake_minimum_required(VERSION 3.10)
# So library linking is more sane.
cmake_policy(SET CMP0003 NEW)
# So syntax problems are errors.
cmake_policy(SET CMP0010 NEW)
# Input directories must have CMakeLists.txt
cmake_policy(SET CMP0014 NEW)
# Compile definitions.
cmake_policy(SET CMP0043 NEW)
# Use ROOT variables in find_package.
cmake_policy(SET CMP0074 NEW)
# Convert relative paths to absolute in target_sources()
cmake_policy(SET CMP0076 NEW)
# Copy files from source directory to destination directory, substituting any
# variables. Create destination directory if it does not exist.
macro(configure_files srcDir destDir)
message(STATUS "Configuring directory ${destDir}")
make_directory(${destDir})
file(GLOB templateFiles RELATIVE ${srcDir} ${srcDir}/*)
foreach(templateFile ${templateFiles})
set(srcTemplatePath ${srcDir}/${templateFile})
if(NOT IS_DIRECTORY ${srcTemplatePath})
message(STATUS "Configuring file ${templateFile}")
configure_file(
${srcTemplatePath}
${destDir}/${templateFile}
@ONLY)
endif(NOT IS_DIRECTORY ${srcTemplatePath})
endforeach(templateFile)
endmacro(configure_files)
# Initialize project
project(GPURayTracer)
# Add executable
add_executable(${PROJECT_NAME})
set(default_build_type "Release")
set(CMAKE_BINARY_DIR ${CMAKE_BINARY_DIR}/bin)
set_target_properties(${PROJECT_NAME} PROPERTIES RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
# Find GLFW
set(GLFW_BUILD_DOCS OFF CACHE BOOL "" FORCE)
set(GLFW_BUILD_TESTS OFF CACHE BOOL "" FORCE)
set(GLFW_BUILD_EXAMPLES OFF CACHE BOOL "" FORCE)
find_path(GLFW_INCLUDE_DIR GLFW/glfw3.h
HINTS
${CMAKE_CURRENT_SOURCE_DIR}/include
${CMAKE_CURRENT_SOURCE_DIR}/lib
${GLFW_ROOT}
${GLFW_ROOT}/include)
if(GLFW_INCLUDE_DIR)
message(STATUS "GLFW_INCLUDE_DIR: ${GLFW_INCLUDE_DIR}")
else()
message(FATAL_ERROR "glfw3.h not found")
endif()
find_path(GLFW_LIB_DIR glfw3.lib
HINTS
${CMAKE_CURRENT_SOURCE_DIR}/include
${CMAKE_CURRENT_SOURCE_DIR}/lib
${GLFW_ROOT}/lib
${GLFW_ROOT}/lib-vc2019
${GLFW_ROOT}/lib-vc2017
${GLFW_ROOT}/lib-vc2015)
if(GLFW_LIB_DIR)
message(STATUS "GLFW_LIB_DIR: ${GLFW_LIB_DIR}")
else()
message(FATAL_ERROR "glfw3.lib not found")
endif()
# Find GLEW
find_package(GLEW REQUIRED)
if(GLEW_FOUND)
set(GLEW_INCLUDE_DIR ${GLEW_INCLUDE_DIRS})
get_filename_component(GLEW_LIBRARIES ${GLEW_LIBRARIES} DIRECTORY)
message(STATUS "GLEW_INCLUDE_DIR: ${GLEW_INCLUDE_DIR}")
message(STATUS "GLEW_LIBRARIES: ${GLEW_LIBRARIES}")
else()
message(FATAL_ERROR "GLEW not found")
endif()
# Find OpenGL
if(NOT WIN32)
find_package(OpenGL REQUIRED)
endif()
# Find stb_image
find_path(stb_image_INCLUDE_DIR stb_image.h
HINTS
${CMAKE_CURRENT_SOURCE_DIR}/include
${CMAKE_CURRENT_SOURCE_DIR}/include/stb
${CMAKE_CURRENT_SOURCE_DIR}/lib
${stb_image_ROOT})
if(stb_image_INCLUDE_DIR)
message(STATUS "stb_image_INCLUDE_DIR: ${stb_image_INCLUDE_DIR}")
else()
message(FATAL_ERROR "stb_image not found")
endif()
# Find stb_image
find_path(ComputeEngine_LIB_DIR ComputeEngine.lib
HINTS
${CMAKE_CURRENT_SOURCE_DIR}/include
${CMAKE_CURRENT_SOURCE_DIR}/lib
${ComputeEngine_ROOT}
${ComputeEngine_ROOT}/lib
${ComputeEngine_ROOT}/bin
${ComputeEngine_ROOT}/bin/x64/Release)
if(ComputeEngine_LIB_DIR)
message(STATUS "ComputeEngine_LIB_DIR: ${ComputeEngine_LIB_DIR}")
else()
message(FATAL_ERROR "ComputeEngine.lib not found")
endif()
find_path(ComputeEngine_INCLUDE_DIR ComputeEngine.h
HINTS
${CMAKE_CURRENT_SOURCE_DIR}/include
${CMAKE_CURRENT_SOURCE_DIR}/lib
${ComputeEngine_ROOT}
${ComputeEngine_ROOT}/src)
if(ComputeEngine_INCLUDE_DIR)
message(STATUS "ComputeEngine_INCLUDE_DIR: ${ComputeEngine_INCLUDE_DIR}")
else()
message(FATAL_ERROR "ComputeEngine not found")
endif()
# Add source
add_subdirectory(src)
include_directories(${CMAKE_CURRENT_SOURCE_DIR}/src
${GLFW_INCLUDE_DIR}
${OPENGL_INCLUDE_DIR}
${stb_image_INCLUDE_DIR}
${ComputeEngine_INCLUDE_DIR}
${GLEW_INCLUDE_DIR})
target_link_directories(${PROJECT_NAME} PUBLIC ${GLFW_LIB_DIR} ${GLEW_LIBRARIES} ${ComputeEngine_LIB_DIR})
target_link_libraries(${PROJECT_NAME} "glfw3.lib" "opengl32.lib" "glew32s.lib" "ComputeEngine.lib")
# Copy shaders, assets and configs for binaries to access
file(COPY shaders DESTINATION ${CMAKE_BINARY_DIR}/Release)
file(COPY assets DESTINATION ${CMAKE_BINARY_DIR}/Release)
file(COPY configs DESTINATION ${CMAKE_BINARY_DIR}/Release)

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MIT License
Copyright (c) 2021 Dawid Pietrykowski
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

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README.md Normal file
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# GPU Ray Tracer
GPU Ray Tracing application based on my OpenGL Compute Engine.
<p align="center">
<img src="screenshots/fox2.png">
</p>
## Dependencies
* OpenGL
* GLFW
* GLEW
* [stb_image](https://github.com/nothings/stb)
* [OpenGL Compute Engine](https://github.com/DawidPietrykowski/ComputeEngine)
## Build
Specify these root directories for dependencies in [make.bat](make.bat) script:
* GLFW_ROOT
* GLEW_ROOT
* stb_image_ROOT
* ComputeEngine_ROOT
Run [make.bat](make.bat) script.
## Config files
Each scene/configuration is described in a config file.
Example scenes are located in [/configs](configs) directory.
All available parameters are specified in [config_template.txt](config_template.txt).
## Usage
Pass chosen config file to the generated executable as an argument in command line.
If no argument given, *config.txt* is picked.
## Features
* Wavefront (.obj) file import
* PNG, JPG, HDR texture import
* Object can be an imported triangle mesh, sphere or infinite plane
* Each scene is saved in a separate file
* Specular and diffuse reflections
* Physics based refractions
* Camera movement
* Screenshot saving
## Example images
Mesh | Refraction
:-------------------------:|:-------------------------:
![](screenshots/fox2.png) | ![](screenshots/refraction1.png)
Multiple meshes 1 | Multiple meshes 2
![](screenshots/objects1.png) | ![](screenshots/objects4.jpg)
Solar system 1 | Solar system 2
![](screenshots/solar_system1.png) | ![](screenshots/solar_system2.png)
## Keys
Camera
* UP - SPACE
* DOWN - CTRL
* LEFT - A
* RIGHT - D
* FORWARD - W
* BACKWARD - S
Window
* Screenshot - L
* Disable input to window - P
* Close application - ESC
## License and copyright
© Dawid Pietrykowski
Licensed under the [MIT LICENSE](LICENSE)

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# Blender v2.93.1 OBJ File: ''
# www.blender.org
mtllib Tri1.mtl
o Triangle1_Plane.001
v 0.000000 0.250000 0.250000
v -0.000000 -0.250000 0.250000
v -0.000000 -0.250000 -0.250000
vt 0.000000 0.000000
vt 0.000000 0.000000
vt 0.000000 0.000000
vn 1.0000 -0.0000 0.0000
usemtl None
s off
f 2/1/1 3/2/1 1/3/1

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# Blender v2.93.1 OBJ File: ''
# www.blender.org
mtllib Tri2.mtl
o Triangle1_Plane.001
v 0.000000 0.866000 0.000000
v -0.000000 0.000000 0.500000
v -0.000000 0.000000 -0.500000
vt 0.000000 0.000000
vt 0.000000 0.000000
vt 0.000000 0.000000
vn 1.0000 -0.0000 0.0000
usemtl None
s off
f 2/1/1 3/2/1 1/3/1

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# Aspose.3D Wavefront OBJ Exporter
# Copyright 2004-2020 Aspose Pty Ltd.
# File created: 03/29/2021 23:03:24
#
# object obj_49383600
#
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v 35.53003692626953128 14.81942272186279296 95.24540710449218752
# 148 vertices
vn -0.24970725178718568 0.335138738155365 0.90847581624984736
vn 0.58663380146026608 -0.68023526668548584 -0.43947783112525936
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vn -0.11968009173870086 -0.77974206209182736 0.61455595493316648
vn 0.00984428916126489 0.95510029792785648 -0.29611912369728088
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vn -0.88608634471893312 -0.09288705885410308 -0.45411783456802368
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g obj_49383600
s 1
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#292 polygons

738
assets/objects/bunny1.obj Normal file
View File

@ -0,0 +1,738 @@
# Blender v2.92.0 OBJ File: ''
# www.blender.org
mtllib bunny1.mtl
o Bunny-LowPoly.001
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# www.blender.org
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f 5/13/6 1/3/6 2/10/6
f 9/2/8 7/14/8 3/4/8
f 1/3/9 9/2/9 3/4/9

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assets/objects/cube.obj Normal file
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# Blender v2.92.0 OBJ File: ''
# www.blender.org
mtllib cube.mtl
o Cube
v 1.000000 1.000000 -1.000000
v 1.000000 -1.000000 -1.000000
v 1.000000 1.000000 1.000000
v 1.000000 -1.000000 1.000000
v -1.000000 1.000000 -1.000000
v -1.000000 -1.000000 -1.000000
v -1.000000 1.000000 1.000000
v -1.000000 -1.000000 1.000000
vt 0.625000 0.500000
vt 0.875000 0.500000
vt 0.875000 0.750000
vt 0.625000 0.750000
vt 0.375000 0.750000
vt 0.625000 1.000000
vt 0.375000 1.000000
vt 0.375000 0.000000
vt 0.625000 0.000000
vt 0.625000 0.250000
vt 0.375000 0.250000
vt 0.125000 0.500000
vt 0.375000 0.500000
vt 0.125000 0.750000
vn 0.0000 1.0000 0.0000
vn 0.0000 0.0000 1.0000
vn -1.0000 0.0000 0.0000
vn 0.0000 -1.0000 0.0000
vn 1.0000 0.0000 0.0000
vn 0.0000 0.0000 -1.0000
usemtl Material
s off
f 1/1/1 5/2/1 7/3/1 3/4/1
f 4/5/2 3/4/2 7/6/2 8/7/2
f 8/8/3 7/9/3 5/10/3 6/11/3
f 6/12/4 2/13/4 4/5/4 8/14/4
f 2/13/5 1/1/5 3/4/5 4/5/5
f 6/11/6 5/10/6 1/1/6 2/13/6

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assets/objects/cubeT.obj Normal file
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# Blender v2.92.0 OBJ File: ''
# www.blender.org
mtllib cubeT.mtl
o Cube
v 1.000000 1.000000 -1.000000
v 1.000000 -1.000000 -1.000000
v 1.000000 1.000000 1.000000
v 1.000000 -1.000000 1.000000
v -1.000000 1.000000 -1.000000
v -1.000000 -1.000000 -1.000000
v -1.000000 1.000000 1.000000
v -1.000000 -1.000000 1.000000
vt 0.875000 0.500000
vt 0.625000 0.750000
vt 0.625000 0.500000
vt 0.375000 1.000000
vt 0.375000 0.750000
vt 0.625000 0.000000
vt 0.375000 0.250000
vt 0.375000 0.000000
vt 0.375000 0.500000
vt 0.125000 0.750000
vt 0.125000 0.500000
vt 0.625000 0.250000
vt 0.875000 0.750000
vt 0.625000 1.000000
vn 0.0000 1.0000 0.0000
vn 0.0000 0.0000 1.0000
vn -1.0000 0.0000 0.0000
vn 0.0000 -1.0000 0.0000
vn 1.0000 0.0000 0.0000
vn 0.0000 0.0000 -1.0000
usemtl Material
s off
f 5/1/1 3/2/1 1/3/1
f 3/2/2 8/4/2 4/5/2
f 7/6/3 6/7/3 8/8/3
f 2/9/4 8/10/4 6/11/4
f 1/3/5 4/5/5 2/9/5
f 5/12/6 2/9/6 6/7/6
f 5/1/1 7/13/1 3/2/1
f 3/2/2 7/14/2 8/4/2
f 7/6/3 5/12/3 6/7/3
f 2/9/4 4/5/4 8/10/4
f 1/3/5 3/2/5 4/5/5
f 5/12/6 1/3/6 2/9/6

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assets/objects/cubeUV.obj Normal file
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# Blender v2.93.1 OBJ File: ''
# www.blender.org
mtllib cubeUV.mtl
o Cube_Cube.001
v -0.250000 0.000000 0.250000
v -0.250000 0.500000 0.250000
v -0.250000 0.000000 -0.250000
v -0.250000 0.500000 -0.250000
v 0.250000 0.000000 0.250000
v 0.250000 0.500000 0.250000
v 0.250000 0.000000 -0.250000
v 0.250000 0.500000 -0.250000
vt 0.999900 0.000100
vt 0.999900 0.999900
vt 0.000100 0.999900
vt 0.000100 0.000100
vt 0.999900 0.000100
vt 0.999900 0.999900
vt 0.000100 0.999900
vt 0.000100 0.000100
vt 0.000100 0.999900
vt 0.000100 0.000100
vt 0.999900 0.000100
vt 0.999900 0.999900
vt 0.000100 0.999900
vt 0.000100 0.000100
vt 0.999900 0.000100
vt 0.999900 0.999900
vt 0.999900 0.000100
vt 0.000100 0.999900
vt 0.999900 0.000100
vt 0.000100 0.999900
vn -1.0000 0.0000 0.0000
vn 0.0000 0.0000 -1.0000
vn 1.0000 0.0000 0.0000
vn 0.0000 0.0000 1.0000
vn 0.0000 -1.0000 0.0000
vn 0.0000 1.0000 0.0000
usemtl Material.001
s off
f 1/1/1 2/2/1 4/3/1 3/4/1
f 3/5/2 4/6/2 8/7/2 7/8/2
f 7/9/3 8/10/3 6/11/3 5/12/3
f 5/13/4 6/14/4 2/15/4 1/16/4
f 3/4/5 7/17/5 5/12/5 1/18/5
f 8/10/6 4/19/6 2/2/6 6/20/6

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assets/objects/fox/fox.mtl Normal file
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# Blender MTL File: 'None'
# Material Count: 1
newmtl fox_material
Ns 96.078431
Ka 0.000000 0.000000 0.000000
Kd 1.000000 1.000000 1.000000
Ks 0.089804 0.089804 0.089804
Ni 1.000000
d 1.000000
illum 2
map_Kd texture.png

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assets/objects/plane.obj Normal file
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# Blender v2.93.1 OBJ File: ''
# www.blender.org
mtllib untitled.mtl
o Plane
v -0.000000 0.000000 1.000000
v 0.000000 2.000000 1.000000
v -0.000000 0.000000 -1.000000
v 0.000000 2.000000 -1.000000
vt 0.000000 0.000000
vt 1.000000 0.000000
vt 1.000000 1.000000
vt 0.000000 1.000000
vn -1.0000 0.0000 0.0000
usemtl Material.001
s off
f 1/1/1 2/2/1 4/3/1 3/4/1

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assets/objects/pyramid.obj Normal file
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# OBJ file created by ply_to_obj.c
#
g Object001
v 0 0 0
v 1 0 0
v 1 1 0
v 0 1 0
v 0.5 0.5 1.6
f 5 2 3
f 4 5 3
f 6 3 2
f 5 6 2
f 4 6 5
f 6 4 3

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config_template.txt Normal file
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# config
window_name
window_size
pixel_shader_path
# shader data
iterations
samples
camera_position
camera_rotation
sensitivity
fov
# textures
texture_sky_path
texture_1_path
texture_2_path
texture_3_path
texture_4_path
texture_5_path
# only 5 textures available
# imported models
object_0
object_1
object_2
object_3
object_4
object_5
object_(...)
# object
obj_id
texture_albedo
texture_specular
texture_emission
position
rotation
size
albedo
specular
emission
smoothness
refractive_index
transparency
type

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configs/config.txt Normal file
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# config
window_name Ray Tracing
window_size 1024 512
pixel_shader_path shaders/ray_tracing/RayTracing.compute
object_shader_path
# shader data
reflections 15
samples 1
camera_position 20 10 -40
camera_rotation -7 22 0
sensitivity 10
fov 40
# textures
texture_sky_path assets/textures/kiara_1_dawn_4k.hdr
texture_2_path assets/textures/grid.jpg
texture_3_path assets/textures/moon.jpg
# imported models
object_1 assets/objects/plane.obj
object_2 assets/objects/cube.obj
object_3 assets/objects/cubeUV.obj
# transparent cube 1
model
obj_id 2
texture_albedo 0
texture_specular 0
texture_emission 0
position 0 0 0
rotation 0 90 0
size 5 5 5
albedo 0 0 0
specular 1 1 1
emission 0 0 0
smoothness 1
refractive_index 1.1
transparency 0.9
type 2
# transparent cube 2
model
obj_id 3
texture_albedo 0
texture_specular 3
texture_emission 3
position -22.5 0 0
rotation 0 90 0
size 20 20 20
albedo 0 0 0
specular 5 5 5
emission 1 1 1
smoothness 1
refractive_index 1
transparency 1
type 2
# transparent sphere
model
texture_albedo 0
texture_specular 0
texture_emission 0
position 22.5 5 0
rotation 0 90 0
size 5 5 5
albedo 0 0 0
specular 1 1 1
emission 0 0 0
smoothness 0.9
refractive_index 1.5
transparency 0.99
type sphere
# plane
model
obj_id 1
texture_albedo 2
texture_specular 2
texture_emission 0
position -50 0 0
rotation 0 0 90
size 1 50 50
albedo 1 1 1
specular 0.1 0.1 0.1
emission 0 0 0
smoothness 1

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configs/demo_1.txt Normal file
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# config
window_name Ray Tracing Refraction Demo 1
window_size 1024 1024
pixel_shader_path shaders/ray_tracing/RayTracing.compute
# shader data
reflections 4
samples 1
camera_position -150 50 -150
camera_rotation -10 -45 0
sensitivity 10
fov 40
# textures
texture_sky_path assets/textures/kiara_1_dawn_4k.hdr
texture_1_path assets/textures/square_floor.png
texture_2_path assets/textures/grid.jpg
texture_3_path assets/objects/fox/texture.png
# imported models
object_0 assets/objects/fox/fox.obj
object_1 assets/objects/plane.obj
object_2 assets/objects/cube.obj
object_3 assets/objects/disco.obj
# fox
model
obj_id 0
texture_albedo 3
texture_specular 0
texture_emission 0
position -5 0 0
rotation 0 70 0
size 0.5 0.5 0.5
albedo 1 1 1
specular 0 0 0
emission 0 0 0
smoothness 1
type 2
# plane
model
obj_id 1
texture_albedo 0
texture_specular 0
texture_emission 0
position -50 0 0
rotation 0 0 90
size 1 50 50
albedo 0 0 0
specular 0.1 0.1 0.1
emission 0 0 0
smoothness 0.9

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configs/demo_2.txt Normal file
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# config
window_name Ray Tracing Refraction Demo 1
window_size 512 512
pixel_shader_path shaders/ray_tracing/RayTracing.compute
# shader data
reflections 10
samples 1
camera_position 30 10 -30
camera_rotation -6 37.5 0
sensitivity 10
fov 40
# textures
texture_sky_path assets/textures/kiara_1_dawn_4k.hdr
texture_1_path assets/textures/square_floor.png
texture_2_path assets/textures/grid.jpg
texture_3_path assets/objects/fox/texture.png
# imported models
object_0 assets/objects/cube.obj
object_1 assets/objects/plane.obj
object_2 assets/objects/cT.obj
object_3 assets/objects/disco.obj
object_4 assets/objects/Tri2.obj
object_5 assets/objects/bunny1.obj
object_6 assets/objects/cubeUV.obj
# bunny
model
obj_id 5
texture_albedo 0
texture_specular 0
texture_emission 0
position 5 0 13
rotation 0 -120 0
size 2 2 2
albedo 0 0 0
specular 0.988 0.76 0.364
emission 0 0 0
smoothness 0.7
type 2
# glowing triangle
model
obj_id 4
texture_albedo 0
texture_specular 0
texture_emission 0
position -5 20 -5
rotation 0 45 90
size 30 30 30
albedo 0.1 0.1 0.1
specular 0.5 0.5 0.5
emission 5 5 5
smoothness 0.2
# pyramid blue
model
obj_id 2
texture_albedo 0
texture_specular 0
texture_emission 0
position 8 0 -10
rotation 0 15 0
size 2 1 2
albedo 0.1 0.1 0.1
specular 0 0 1
emission 0 0 0
smoothness 0.8
# pyramid red
model
obj_id 2
texture_albedo 0
texture_specular 0
texture_emission 0
position 15 0 -5
rotation 0 0 0
size 2 2 2
albedo 0.1 0.1 0.1
specular 1 0 0
emission 0 0 0
smoothness 0.8
# pink glass rectangle
model
obj_id 0
texture_albedo 0
texture_specular 0
texture_emission 0
position -2 0.25 -2
rotation 0 0 0
size 2 6 2
albedo 0 0 0
specular 1 0.4 0.8
emission 0 0 0
smoothness 0.99
transparency 1
refractive_index 1.8
type 2
# rectangle base
model
obj_id 6
texture_albedo 2
texture_specular 0
texture_emission 0
position -2 0 -2
rotation 0 45 0
size 20 0.5 20
albedo 1 1 1
specular 0 0 0
emission 0 0 0
smoothness 0.99
transparency 0
type 2
# glass sphere
model
texture_albedo 0
texture_specular 0
texture_emission 0
position 10 3 0
rotation 0 45 0
size 3 3 3
albedo 0 0 0
specular 1 1 1
emission 0 0 0
smoothness 0.999
refractive_index 1.5
transparency 0.95
type sphere
# plane
model
texture_albedo 0
texture_specular 0
texture_emission 0
position 0 0 0
rotation 0 0 0
size 5 5 5
albedo 1 1 1
specular 0 0 0
emission 0 0 0
smoothness 1
type plane

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configs/demo_refraction1.txt Normal file
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# config
window_name Ray Tracing Refraction Demo 1
window_size 1024 512
pixel_shader_path shaders/ray_tracing/RayTracing.compute
# shader data
reflections 18
samples 1
camera_position 60 20 -60
camera_rotation -10 45 0
sensitivity 10
fov 40
# textures
texture_sky_path assets/textures/kiara_1_dawn_4k.hdr
texture_2_path assets/textures/grid.jpg
# imported models
object_0 assets/objects/fox/fox.obj
object_1 assets/objects/plane.obj
object_2 assets/objects/cube.obj
object_3 assets/objects/disco.obj
# transparent cube 1
model
obj_id 2
texture_albedo 0
texture_specular 0
texture_emission 0
position 0 0 22.5
rotation 0 90 0
size 5 5 5
albedo 0 0 0
specular 0.9 0.9 0.9
emission 0 0 0
smoothness 1
refractive_index 1.2
transparency 1
type 2
# transparent cube 2
model
obj_id 2
texture_albedo 0
texture_specular 0
texture_emission 0
position -22.5 0 22.5
rotation 0 90 0
size 5 5 5
albedo 0 0 0
specular 0.7 0.7 0.7
emission 0 0 0
smoothness 1
refractive_index 1.4
transparency 0.99
type 2
# transparent cube 3
model
obj_id 2
texture_albedo 0
texture_specular 0
texture_emission 0
position 22.5 0 22.5
rotation 0 90 0
size 5 5 5
albedo 0 0 0
specular 0.8 0.8 0.8
emission 0 0 0
smoothness 0.95
refractive_index 1.1
transparency 0.99
type 2
# transparent sphere
model
texture_albedo 0
texture_specular 0
texture_emission 0
position 0 5 0
rotation 0 90 0
size 5 5 5
albedo 0 0 0
specular 1 1 1
emission 0 0 0
smoothness 1
refractive_index 1.1
transparency 0.99
type sphere
# transparent sphere
model
texture_albedo 0
texture_specular 0
texture_emission 0
position -15 5 0
rotation 0 90 0
size 5 5 5
albedo 0 0 0
specular 1 1 1
emission 0 0 0
smoothness 1
refractive_index 1.2
transparency 0.99
type sphere
# transparent sphere
model
texture_albedo 0
texture_specular 0
texture_emission 0
position -30 5 0
rotation 0 90 0
size 5 5 5
albedo 0 0 0
specular 1 1 1
emission 0 0 0
smoothness 1
refractive_index 1.3
transparency 0.99
type sphere
# transparent sphere
model
texture_albedo 0
texture_specular 0
texture_emission 0
position 15 5 0
rotation 0 90 0
size 5 5 5
albedo 0 0 0
specular 1 1 1
emission 0 0 0
smoothness 0.95
refractive_index 1.5
transparency 0.99
type sphere
# transparent sphere
model
texture_albedo 0
texture_specular 0
texture_emission 0
position 30 5 0
rotation 0 90 0
size 5 5 5
albedo 0 0 0
specular 1 1 1
emission 0 0 0
smoothness 0.5
refractive_index 1.5
transparency 0.99
type sphere
# transparent cube in
model
obj_id 2
texture_albedo 0
texture_specular 0
texture_emission 0
position 0 0 -30
rotation 0 0 0
size 10 10 10
albedo 0 0 0
specular 0.8 0.8 0.8
emission 0 0 0
smoothness 1
refractive_index 1.1
transparency 0.99
type 2
# transparent cube in
model
obj_id 2
texture_albedo 0
texture_specular 0
texture_emission 0
position 0 2 -30
rotation 0 0 0
size 8 8 8
albedo 0 0 0
specular 0.8 0.8 0.8
emission 0 0 0
smoothness 1
refractive_index 1.3
transparency 0.99
type 2
# transparent sphere in cube
model
texture_albedo 0
texture_specular 0
texture_emission 0
position 0 9.5 -30
rotation 0 0 0
size 3 3 3
albedo 0 0 0
specular 0.8 0.8 0.8
emission 0 0 0
smoothness 1
refractive_index 1.4
transparency 0.99
type sphere
# plane
model
obj_id 1
texture_albedo 2
texture_specular 2
texture_emission 0
position -50 0 0
rotation 0 0 90
size 1 50 50
albedo 1 1 1
specular 0.1 0.1 0.1
emission 0 0 0
smoothness 1

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configs/demo_refraction2.txt Normal file
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# config
window_name Ray Tracing Refraction Demo 2
window_size 512 512
pixel_shader_path shaders/ray_tracing/RayTracing.compute
# shader data
reflections 12
samples 1
camera_position -20 10 -50
camera_rotation -3 -22 0
sensitivity 10
fov 40
# textures
texture_sky_path assets/textures/kiara_1_dawn_4k.hdr
texture_2_path assets/textures/grid.jpg
# imported models
object_1 assets/objects/plane.obj
object_2 assets/objects/cube.obj
object_3 assets/objects/disco.obj
# transparent sphere mesh
model
obj_id 3
texture_albedo 0
texture_specular 0
texture_emission 0
position 0 3.5 0
rotation 0 0 0
size 2 2 2
albedo 0 0 0
specular 1 1 1
emission 0 0 0
smoothness 1
refractive_index 1.8
transparency 1
type 2
# transparent sphere mesh
model
obj_id 2
texture_albedo 0
texture_specular 0
texture_emission 0
position 0 0 0
rotation 0 0 0
size 8 8 8
albedo 0 0 0
specular 1 1 1
emission 0 0 0
smoothness 1
refractive_index 1.6
transparency 1
type 2
# plane
model
obj_id 1
texture_albedo 2
texture_specular 2
texture_emission 0
position -50 0 0
rotation 0 0 90
size 1 50 50
albedo 1 1 1
specular 0.1 0.1 0.1
emission 0 0 0
smoothness 1

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configs/demo_solar_system.txt Normal file
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# config
window_name Ray Tracing
window_size 1024 512
pixel_shader_path shaders/ray_tracing/RayTracing.compute
object_shader_path
# shader data
reflections 15
samples 20
camera_position -92 3 -145
camera_rotation -2 -10 0
sensitivity 10
fov 40
# textures
texture_sky_path assets/textures/m_way2.hdr
texture_1_path assets/textures/8k_earth_nightmap.jpg
texture_2_path assets/textures/8k_moon.jpg
texture_3_path assets/textures/8k_mars.jpg
texture_4_path assets/textures/8k_earth_daymap.jpg
texture_5_path assets/textures/8k_venus_surface.jpg
# imported models
object_1 assets/objects/plane.obj
object_2 assets/objects/cube.obj
object_3 assets/objects/cubeUV.obj
# earth
model
texture_albedo 4
texture_specular 0
texture_emission 1
position -100 0 -120
rotation 0 0 0
size 5 5 5
albedo 1 1 1
specular 0 0 0
emission 0.05 0.05 0.05
smoothness 1
type sphere
# venus
model
texture_albedo 5
texture_specular 0
texture_emission 0
position 30 0 -20
rotation 0 0 0
size 3 3 3
albedo 1 1 1
specular 0 0 0
emission 0 0 0
smoothness 1
type sphere
# moon
model
texture_albedo 2
texture_specular 0
texture_emission 0
position -100 10 -80
rotation 0 -45 0
size 2 2 2
albedo 1 1 1
specular 0.01 0.01 0.01
emission 0 0 0
smoothness 0.3
type sphere
# mars
model
texture_albedo 3
texture_specular 0
texture_emission 0
position -30 0 200
rotation 0 -45 0
size 7 7 7
albedo 1 1 1
specular 0 0 0
emission 0 0 0
transparency 0
type sphere
# sun
model
texture_albedo 0
texture_specular 0
texture_emission 0
position 0 0 0
rotation 0 0 0
size 2 2 2
albedo 1 1 1
specular 1 1 1
emission 2000 1200 800
type sphere

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make.bat Normal file
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@echo off
set GLFW_ROOT=C:/lib/glfw-3.3.4.bin.WIN64
set GLEW_ROOT=C:/lib/glew-2.1.0_x64
set stb_image_ROOT=C:/lib/stb
set ComputeEngine_ROOT=C:/VisualStudioProjects/ComputeEngine
cmake -B build -S . -DGLFW_ROOT=%GLFW_ROOT% -DGLEW_ROOT=%GLEW_ROOT% -Dstb_image_ROOT=%stb_image_ROOT% -DComputeEngine_ROOT=%ComputeEngine_ROOT%

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rmdir /s /q build
make.bat

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#version 430 core
#define PI 3.1415926538f
layout(local_size_x = 8, local_size_y = 8) in;
layout(rgba32f) uniform image2D img_output;
uniform sampler2D u_skybox;
uniform sampler2D u_tex1;
uniform sampler2D u_tex2;
uniform sampler2D u_tex3;
uniform sampler2D u_tex4;
uniform sampler2D u_tex5;
precision highp float;
struct SceneObject{
vec4 position;
vec4 size;
vec4 orientation;
vec4 albedo;
vec4 specular;
vec4 emission;
ivec4 texture_id;
float refractive_index;
float transparency;
float smoothness;
int type;
int offset;
int vert_num;
int obj_id;
int padding;
};
struct Ray{
vec3 origin;
vec3 direction;
vec3 color;
};
layout(std140, binding=2) uniform shader_data{
vec4 _camera_position; // 4 4
vec4 _camera_rotation; // 4 8
vec2 _pixel_offset; // 2 10
ivec2 _screen_size; // 2 12
int _iterations; // 1 13
float _seed; // 1 14
int _object_count; // 1 15
int _sample; // 1 16
int _samples_per_frame; // 1 17
int _fov; // 1 18
vec2 padding; // 2 20
};
layout (std140, binding = 3) uniform object_data{
SceneObject objects[1];
};
layout (std430, binding = 4) buffer index_buffer{
int faces[];
};
layout (std430, binding = 5) buffer vert_buffer{
float vertices[];
};
layout (std430, binding = 6) buffer texture_vert_buffer{
float t_vertices[];
};
uniform float u_gamma;
float distlimit = 10000.0f;
float seed = _seed;
vec2 pixel_id;
vec3 DegToRad(vec3 vect){
return vect * float(PI)/180.0f;
}
float saturate(float value){
return clamp(value,0.0,1.0);
}
float sdot(vec3 x, vec3 y){
float f = 1.0f;
return saturate(dot(x, y) * f);
}
float sdot(vec3 x, vec3 y, float f){
return saturate(dot(x, y) * f);
}
// A single iteration of Bob Jenkins' One-At-A-Time hashing algorithm.
uint hash( uint x ) {
x += ( x << 10u );
x ^= ( x >> 6u );
x += ( x << 3u );
x ^= ( x >> 11u );
x += ( x << 15u );
return x;
}
uint hash( uvec3 v ) { return hash( v.x ^ hash(v.y) ^ hash(v.z) ); }
// Construct a float with half-open range [0:1] using low 23 bits.
// All zeroes yields 0.0, all ones yields the next smallest representable value below 1.0.
float floatConstruct( uint m ) {
const uint ieeeMantissa = 0x007FFFFFu; // binary32 mantissa bitmask
const uint ieeeOne = 0x3F800000u; // 1.0 in IEEE binary32
m &= ieeeMantissa; // Keep only mantissa bits (fractional part)
m |= ieeeOne; // Add fractional part to 1.0
float f = uintBitsToFloat( m ); // Range [1:2]
return f - 1.0; // Range [0:1]
}
// Pseudo-random value in half-open range [0:1].
float Rand() { seed += 1.0f; return floatConstruct(hash(floatBitsToUint(vec3(pixel_id, seed)))); }
float SmoothnessToPhongAlpha(float s){
return pow(1000.0f, s * s);
}
mat3x3 GetTangentSpace(vec3 n){
// Choose a helper vector for the cross product
vec3 helper = vec3(1, 0, 0);
if (abs(n.x) > 0.99f)
helper = vec3(0, 0, 1);
// Generate vectors
vec3 t = normalize(cross(n, helper));
vec3 b = normalize(cross(n, t));
return mat3x3(
t.x, b.x, n.x,
t.y, b.y, n.y,
t.z, b.z, n.z
);
}
vec3 SampleHemisphere(vec3 normal, float alpha){
// Sample the hemisphere, where alpha determines the kind of the sampling
float cosTheta = pow(Rand(), 1.0f / (alpha + 1.0f));
float sinTheta = sqrt(1.0f - cosTheta * cosTheta);
float phi = 2 * PI * Rand();
vec3 tangentSpaceDir = vec3(cos(phi) * sinTheta, sin(phi) * sinTheta, cosTheta);
// Transform direction to world space
return normalize(tangentSpaceDir * GetTangentSpace(normal));
}
vec3 RefractRay(vec3 direction, vec3 n, float n1, float n2){
vec3 new_direction;
direction = normalize(direction);
n = normalize(n);
float dotp = dot(n, -direction);
float ratio = n1/n2;
vec3 e1 = (ratio * direction); // n1/n2 * i
float e2 = (ratio * dotp); // n1/n2 * cosB
float e3 = (ratio * ratio) * (1.0f - (dotp * dotp)); // (n1/n2)^2 * (1 - cosB^2)
new_direction = e1 + ((e2 - sqrt(1.0f - e3)) * n); // n1/n2 * i + (n1/n2 * cosB - /(1 - sinT^2) * n
return normalize(new_direction);
}
float GetReflectance(vec3 direction, vec3 normal, float n1, float n2){
float raycast;
float cosI = dot(-direction, normal);
float ratio = n1/n2;
float sin2T = (ratio * ratio) * (1.0f - (cosI * cosI));
if(sin2T <= 1.0f){
// Reflection or Transmission
float cosT = sqrt(1.0f - sin2T);
float R1 = pow((n1 * cosI - n2 * cosT)/(n1 * cosI + n2 * cosT), 2);
float R2 = pow((n2 * cosI - n1 * cosT)/(n2 * cosI + n1 * cosT), 2);
float Ravg = (R1 + R2) / 2.0f;
raycast = Ravg;
}else{
// Total Internal Reflection
raycast = 1.0f;
}
return raycast;
}
vec3 RotateVector(vec3 vect, vec3 rotation){
rotation = DegToRad(rotation);
float xr = rotation.x;
float yr = rotation.y;
float zr = rotation.z;
mat3x3 Rx = mat3x3(
1, 0, 0,
0, cos(xr), -sin(xr),
0, sin(xr), cos(xr)
);
mat3x3 Ry = mat3x3(
cos(yr), 0, sin(yr),
0, 1, 0,
-sin(yr), 0, cos(yr)
);
mat3x3 Rz = mat3x3(
cos(zr), -sin(zr), 0,
sin(zr), cos(zr), 0,
0, 0, 1
);
return (((Ry*Rx)*Rz)*vect);
}
Ray CreateRay(vec3 origin, vec3 direction){
Ray ray;
ray.origin = origin;
ray.direction = normalize(direction);
return ray;
}
Ray CreateCameraRay(float x, float y){
float n = 0.1f;
float fov_v = (float(_fov)/2.0f) * (PI/180.0f);
float ratio = (float(_screen_size.x)/float(_screen_size.y));
float fov_h = atan( tan(fov_v) * ratio );
x = (x - 0.5f) * 2;
y = (y - 0.5f) * 2;
vec3 plane = vec3(x * tan(fov_h) * n,y * tan(fov_v) * n,n);
vec3 direction = RotateVector(normalize(plane),_camera_rotation.xyz);
return CreateRay(_camera_position.xyz,direction);
}
vec4 CheckIntersectionWithSphere(vec3 r1, vec3 r2, int i){
vec3 oc = r1 - objects[i].position.xyz;
float a = dot(r2,r2);
float b = 2.0f * dot(oc, r2);
float c = dot(oc, oc) - objects[i].size.x * objects[i].size.x;
float p = c/a;
float q = -b/a;
float d = b * b - (4 * a * c);
if(p < 0){
//inside
float val = (-b + sqrt(d)) / (2.0f*a);
vec3 hit = r1 + r2 * val;
return vec4(r1 + r2 * val, val);
}else{
if(q > 0){
//hit
float val = (-b - sqrt(d)) / (2.0f*a);
vec3 hit = r1 + r2 * val;
return vec4(r1 + r2 * val, val);
}else{
//not hit
return vec4(vec3(0,0,0),-1.0f);
}
}
}
vec4 CheckIntersectionWithPlane(vec3 r1, vec3 r2, int i){
vec3 normal = normalize(RotateVector(vec3(0,1,0), objects[i].orientation.xyz));
float dotP = dot(normal, r2);
vec3 pos = objects[i].position.xyz;
int ans = int(abs(dotP) >= 0.001f);
float d = dot((pos - r1),normal)/dotP;
return vec4(r1 + r2 * d, ans * (d + 1) - 1);
if(abs(dotP) >= 0.001f){
float d = dot((pos - r1),normal)/dotP;
if(d < 0)
return vec4(vec3(0,0,0),-1.0f);
return vec4(r1 + r2 * d, d);
}
return vec4(vec3(0,0,0),-1.0f);
}
vec3 GetTriangleVertex(int id, int object_id){
vec3 pos = objects[object_id].position.xyz;
vec3 size = objects[object_id].size.xyz;
vec3 rotation = objects[object_id].orientation.xyz;
id = id * 3;
vec3 vertex_from_array = vec3(vertices[id], vertices[id+1], vertices[id+2]);
vec3 vert = RotateVector(vertex_from_array * size, rotation);
return vert + pos;
}
vec2 GetTriangleUV(int id){
id = id * 2;
vec2 vertex_from_array = vec2(t_vertices[id], t_vertices[id+1]);
return vertex_from_array;
}
vec4 CheckIntersectionWithTriangleUV(vec3 r1, vec3 r2, int face_id, int object_id, inout vec2 uv, inout vec3 normal){
const float EPSILON = 0.0000001;
vec3 pos = objects[object_id].position.xyz;
vec3 size = objects[object_id].size.xyz;
vec3 vertex0 = GetTriangleVertex(faces[(face_id * 6) + 0], object_id);
vec3 vertex1 = GetTriangleVertex(faces[(face_id * 6) + 1], object_id);
vec3 vertex2 = GetTriangleVertex(faces[(face_id * 6) + 2], object_id);
vec3 edge1, edge2, h, s, q;
float a,f;
edge1 = vertex1 - vertex0;
edge2 = vertex2 - vertex0;
h = cross(r2, edge2);
vec3 N = cross(edge1,edge2); // N
bool reverse = dot(N, r2) > 0;
normal = (reverse ? -1 : 1) * normalize(N);
a = dot(edge1, h);
if (a > -EPSILON && a < EPSILON)
return vec4(0.0f, 0.0f, 0.0f, -1.0f); // This ray is parallel to this triangle.
f = 1.0/a;
s = r1 - vertex0;
uv.x = f * dot(s, h);
if (uv.x < 0.0 || uv.x > 1.0)
return vec4(0.0f, 0.0f, 0.0f, -1.0f); // This ray is parallel to this triangle.
q = cross(s, edge1);
uv.y = f * dot(r2, q);
if (uv.y < 0.0 || uv.x + uv.y > 1.0)
return vec4(0.0f, 0.0f, 0.0f, -1.0f); // This ray is parallel to this triangle.
// At this stage we can compute t to find out where the intersection point is on the line.
float t = f * dot(edge2, q);
if (t > EPSILON) // ray intersection
{
// map uv
float u = uv.x;
float v = uv.y;
float w = 1.0 - uv.x - uv.y;
// A(v0) - w
// B(v1) - u
// C(v2) - v
vec2 uv0 = GetTriangleUV(faces[(face_id * 6) + 3]);
vec2 uv1 = GetTriangleUV(faces[(face_id * 6) + 4]);
vec2 uv2 = GetTriangleUV(faces[(face_id * 6) + 5]);
uv = uv0 * w + uv1 * u + uv2 * v;
return vec4(r1 + r2 * t, t); // This ray is parallel to this triangle.
}
else // This means that there is a line intersection but not a ray intersection.
return vec4(0.0f, 0.0f, 0.0f, -1.0f); // This ray is parallel to this triangle.
}
vec4 CheckIntersectionWithMesh(vec3 r1, vec3 r2, int object_id, inout vec3 normal, inout vec2 uv){
vec4 raycast;
float val = 100000.0f;
vec3 hit_point;
vec3 temp_normal;
vec2 temp_uv;
int vert_num = objects[object_id].vert_num;
int offset = objects[object_id].offset;
for(int i = 0; i < vert_num; i++){
raycast = CheckIntersectionWithTriangleUV(r1, r2, offset + i, object_id, temp_uv, temp_normal);
if (raycast.w >= 0 && raycast.w < val){
hit_point = raycast.xyz;
val = raycast.w;
normal = temp_normal;
uv = temp_uv;
}
}
return vec4(hit_point, val);
}
float GetEnergy(vec3 color){
return dot(color, vec3(1.0f / 3.0f));
}
vec3 GetTextureColor(vec2 uv, int object_id, int map){
int id = objects[object_id].texture_id[map];
switch(id){
case 0:
return vec3(1.0f,1.0f,1.0f);
case 1:
return texture(u_tex1, uv).xyz;
case 2:
return texture(u_tex2, uv).xyz;
case 3:
return texture(u_tex3, uv).xyz;
case 4:
return texture(u_tex4, uv).xyz;
case 5:
return texture(u_tex5, uv).xyz;
default:
return vec3(1.0f,1.0f,1.0f);
}
}
vec3 GetNormal_old(vec3 pos, int object_id){
vec3 normal = vec3(0,1,0);
if(objects[object_id].type == 0) //sphere
normal = normalize(pos - objects[object_id].position.xyz);
else if(objects[object_id].type == 1) //plane
normal = normalize(RotateVector(vec3(0,1,0), objects[object_id].orientation.xyz));
else if(objects[object_id].type == 2){ //mesh
int v_offset = objects[object_id].offset;
vec3 v0 = GetTriangleVertex(faces[(v_offset * 6) + 0], object_id);
vec3 v1 = GetTriangleVertex(faces[(v_offset * 6) + 1], object_id);
vec3 v2 = GetTriangleVertex(faces[(v_offset * 6) + 2], object_id);
vec3 A = v1 - v0; // edge 0
vec3 B = v2 - v0; // edge 1
normal = normalize(cross(A, B));
}
return normal;
}
vec3 GetNormal(vec3 pos, vec3 dir, int object_id){
vec3 normal = vec3(0,1,0);
if(objects[object_id].type == 0) //sphere
normal = normalize(pos - objects[object_id].position.xyz);
else if(objects[object_id].type == 1) //plane
normal = normalize(RotateVector(vec3(0,1,0), objects[object_id].orientation.xyz));
else if(objects[object_id].type == 2){ //mesh
int v_offset = objects[object_id].offset;
vec3 v0 = GetTriangleVertex(faces[(v_offset * 6) + 0], object_id);
vec3 v1 = GetTriangleVertex(faces[(v_offset * 6) + 1], object_id);
vec3 v2 = GetTriangleVertex(faces[(v_offset * 6) + 2], object_id);
vec3 A = v1 - v0; // edge 0
vec3 B = v2 - v0; // edge 1
normal = normalize(cross(A, B));
}
bool reverse = dot(normal, dir) > 0;
normal = (reverse ? -1 : 1) * normalize(normal);
return normal;
}
vec3 GetNormal(vec3 pos, vec3 dir, int object_id, inout bool reversed){
vec3 normal = vec3(0,1,0);
if(objects[object_id].type == 0) //sphere
normal = normalize(pos - objects[object_id].position.xyz);
else if(objects[object_id].type == 1) //plane
normal = normalize(RotateVector(vec3(0,1,0), objects[object_id].orientation.xyz));
else if(objects[object_id].type == 2){ //mesh
int v_offset = objects[object_id].offset;
vec3 v0 = GetTriangleVertex(faces[(v_offset * 6) + 0], object_id);
vec3 v1 = GetTriangleVertex(faces[(v_offset * 6) + 1], object_id);
vec3 v2 = GetTriangleVertex(faces[(v_offset * 6) + 2], object_id);
vec3 A = v1 - v0; // edge 0
vec3 B = v2 - v0; // edge 1
normal = normalize(cross(A, B));
}
reversed = dot(normal, dir) > 0;
normal = (reversed ? -1 : 1) * normalize(normal);
return normal;
}
vec4 CastRay(Ray ray, inout vec3 normal, inout vec2 uv){
int object_id = -1;
vec4 raycast;
float val = distlimit;
vec3 hit_point;
vec3 temp_normal;
vec2 temp_uv;
for(int i = 0; i < _object_count; i++){
vec3 r1 = ray.origin;
vec3 r2 = ray.direction;
vec3 op = objects[i].position.xyz;
float r = objects[i].size.x;
if(objects[i].type == 0){
raycast = CheckIntersectionWithSphere(r1,r2,i);
if(raycast.w > 0){
bool reversed;
temp_normal = GetNormal(raycast.xyz,r2,i,reversed);
float theta = 1.0f - (acos((reversed ? -1 : 1) * temp_normal.y) / PI);
float phi = atan((reversed ? -1 : 1) * temp_normal.z, (reversed ? -1 : 1) * temp_normal.x) / (2 * PI) + 0.5f;
temp_uv.x = mod((phi + (objects[i].orientation[1] / (2.0 * PI))), 1);
temp_uv.y = theta;
}
}
else if(objects[i].type == 1){
raycast = CheckIntersectionWithPlane(r1,r2,i);
if(raycast.w > 0)
temp_normal = GetNormal(raycast.xyz,r2, i);
}
else if(objects[i].type == 2){
raycast = CheckIntersectionWithMesh(r1,r2,i, temp_normal, temp_uv);
}
else
raycast = vec4(0,0,0,distlimit);
if (raycast.w >= 0 && raycast.w < val){
hit_point = raycast.xyz;
val = raycast.w;
object_id = i;
normal = temp_normal;
uv = temp_uv;
}
}
return vec4(hit_point,object_id);
}
vec3 GetSkyColor(vec3 direction){
float theta = 1.0f - (acos(direction.y) / PI);
float phi = atan(direction.x, direction.z) / (2 * PI) + 0.5f;
return texture(u_skybox, vec2(phi, theta)).xyz;
}
void main(){
ivec2 id = ivec2(gl_GlobalInvocationID.xy);
vec4 pixel = vec4(0.0f, 0.0f, 0.0f, 1.0f);
vec4 raycast;
vec4 raycast_n;
vec3 color;
vec3 reflection;
vec3 normal;
vec3 albedo;
vec3 specular;
vec3 energy;
vec2 offset = _pixel_offset;
vec2 uv;
Ray reflection_ray;
Ray camera_ray;
float x, y;
float diffuse_chance;
float specular_chance;
float refraction_chance;
float sum;
float roulette;
float f;
float alpha;
float dist;
float air_transparency = 1.0f;
int face_id;
int object_id;
bool inside_object[100];
float refractive_indices_queue[100];
refractive_indices_queue[0] = air_transparency;
int refractive_indices_count = 1;
for(int i = 0; i < 100; i++){
inside_object[i] = false;
}
pixel_id = id;
for(int s = 0; s < _samples_per_frame; s++){
// map x,y to [0,1]
x = (((float(id.x) - 0.5f + offset.x)/_screen_size.x));
y = (((float(id.y) - 0.5f + offset.y)/_screen_size.y));
// new random offset
offset = vec2(1.0f * (abs(Rand()) - 0.5f) ,1.0f * (abs(Rand()) - 0.5f));
color = vec3(0.0f, 0.0f, 0.0f);
// get pixel for random generator
pixel_id = vec2(id) + offset;
// create a ray and cast it
camera_ray = CreateCameraRay(x,y);
raycast = CastRay(camera_ray, normal, uv);
object_id = int(raycast.w);
// if hit any object
if(object_id >= 0){
// calculate distance between rays
dist = length(_camera_position.xyz - raycast.xyz);
// initial energy values
energy = vec3(1.0f, 1.0f, 1.0f);
// add emmission from map
color += objects[object_id].emission.xyz * GetTextureColor(uv, object_id, 3);
//color += normal;
reflection_ray = camera_ray;
// recast ray multiple times
for(int i = 0; i < _iterations; i++){
roulette = Rand();
// get specular and albedo
specular = objects[object_id].specular.xyz * GetTextureColor(uv, object_id, 1);
albedo = min(1.0f - specular, objects[object_id].albedo.xyz * GetTextureColor(uv, object_id, 0));
// check if object is translucent
bool translucent = (objects[object_id].transparency > 0.01f);
if(translucent){
// refractive indicies
float n1;
float n2;
// 0 -> 1
if(!inside_object[object_id]){
// n1 is set to last index
n1 = refractive_indices_queue[refractive_indices_count-1];
// n2 is set to new object
n2 = objects[object_id].refractive_index;
}
else{ // 1 -> 0
// n1 is set to last index
n1 = refractive_indices_queue[refractive_indices_count-1];
// n2 is set to the one before that
n2 = refractive_indices_queue[refractive_indices_count-2];
}
f = 1.0f;
if(objects[object_id].smoothness <= 0.9999f){
alpha = SmoothnessToPhongAlpha(objects[object_id].smoothness);
normal = SampleHemisphere(normal, alpha);
f = (alpha + 2) / (alpha + 1);
}
// calculate reflection and transmission
float val_R = GetReflectance(reflection_ray.direction.xyz, normal, n1, n2);
float val_T = 1.0f - val_R;
bool refract = (roulette < val_T);
bool entering = !inside_object[object_id];
// update queue
if(refract){
inside_object[object_id] = !inside_object[object_id];
reflection = RefractRay(reflection_ray.direction, normal, n1, n2);
if(entering){
// add n2 to queue
refractive_indices_count++;
refractive_indices_queue[refractive_indices_count - 1] = n2;
}else{
// leaving (1 -> 0)
refractive_indices_count--;
}
}
else{
reflection = reflect(reflection_ray.direction, normal);
// no change to queue
}
vec3 ray_normal;
if(refract)
ray_normal = normal * -1;
else
ray_normal = normal;
// create and cast reflection ray
reflection_ray = CreateRay(raycast.xyz + ray_normal * 0.001f, reflection);
// calculate loss due to partial transparency
float transmittance = 1;
if(!entering)
transmittance = pow(10, -1 * (1.0f - objects[object_id].transparency) * dist);
// update energy
energy *= specular * transmittance;
}
else{
// calculate chances
diffuse_chance = GetEnergy(albedo.xyz) + 0.0001f;
specular_chance = GetEnergy(specular.xyz) + 0.0001f;
sum = diffuse_chance + specular_chance;
diffuse_chance /= sum;
specular_chance /= sum;
if(roulette < diffuse_chance){
//diffuse
reflection = SampleHemisphere(normal, 1.0f);
// update energy
energy *= albedo * 2 * sdot(normal, reflection);
}else{
// specular
reflection = normalize(reflection_ray.direction - 2 * dot(reflection_ray.direction, normal) * normal);
f = 1.0f;
if(objects[object_id].smoothness <= 0.9999f){
alpha = SmoothnessToPhongAlpha(objects[object_id].smoothness);
reflection = SampleHemisphere(reflection, alpha);
f = (alpha + 2) / (alpha + 1);
}
// update energy
energy *= specular * 2 * sdot(normal, reflection);
}
//create and cast reflected ray
reflection_ray = CreateRay(raycast.xyz + normal * 0.001f, reflection);
}
// cast new ray
raycast_n = CastRay(reflection_ray, normal, uv);
object_id = int(raycast_n.w);
//if hit sky, break and get color * energy
if(object_id == -1){
color += energy * GetSkyColor(reflection_ray.direction);
break;
}else{
color += energy * objects[object_id].emission.xyz * GetTextureColor(uv, object_id, 3);
dist = length(raycast_n.xyz - raycast.xyz);
}
// if energy is low, no need to keep going
if((energy.x + energy.y + energy.z <= 0.01f && i > 1)){
break;
}
raycast = raycast_n;
}
}
else{
// sample skybox
color = GetSkyColor(camera_ray.direction);
}
// add sample
pixel += vec4(color.xyz, 0.0f);
}
// get average over samples
pixel = vec4(pixel.xyz/float(_samples_per_frame), 1.0f);
// update the new average
vec4 old = imageLoad(img_output, id);
pixel = old + (vec4(pixel) - old)/_sample;
// update pixel in texture
imageStore(img_output, id, pixel);
}

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target_sources(${PROJECT_NAME}
PUBLIC
main.cpp
DataStructures.cpp
DataStructures.h
Utils.cpp
Utils.h
Config.cpp
Config.h
)

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#include <Config.h>
Config::Config(std::string path) {
LoadConfigFile(path);
}
std::vector<SceneObject>* Config::GetObjects()
{
return &m_objects;
}
int Config::GetVertexCount()
{
return m_buffer.GetVertexCount();
}
int Config::GetFaceCount()
{
return m_buffer.GetFaceCount();
}
int Config::GetObjectCount()
{
return (int)m_objects.size();
}
Config::Config() {
}
bool Config::LoadConfigFile(std::string path)
{
std::fstream file(path);
std::string line;
std::stringstream str;
std::string prefix;
int vertex_id = 0;
float x, y, z;
int ix, iy, iz;
std::string data;
bool reading_object = false;
while (std::getline(file, line)) {
str.clear();
str.str(line);
str >> prefix;
if (line.length() == 0)
continue;
if (line[0] == '#')
continue;
if (prefix == "window_name") {
m_window_name = line.substr(prefix.length() + 1, line.length() - prefix.length());
}
else if (prefix == "window_size") {
str >> ix >> iy;
m_window_width = ix;
m_window_height = iy;
}
else if (prefix == "start_focused") {
data = line.substr(prefix.length() + 1, line.length() - prefix.length() - 1);
if (data == "true" || data == "1")
m_start_focused = true;
else
m_start_focused = false;
}
else if (prefix == "pixel_shader_path") {
data = line.substr(prefix.length() + 1, line.length() - prefix.length() - 1);
m_pixel_shader_path = data;
}
else if (prefix == "object_shader_path") {
data = line.substr(prefix.length() + 1, line.length() - prefix.length() - 1);
m_object_shader_path = data;
}
else if (prefix == "texture_sky_path") {
data = line.substr(prefix.length() + 1, line.length() - prefix.length() - 1);
m_texture_sky_path = data;
}
else if (prefix == "texture_1_path") {
data = line.substr(prefix.length() + 1, line.length() - prefix.length() - 1);
m_texture_1_path = data;
}
else if (prefix == "texture_2_path") {
data = line.substr(prefix.length() + 1, line.length() - prefix.length() - 1);
m_texture_2_path = data;
}
else if (prefix == "texture_3_path") {
data = line.substr(prefix.length() + 1, line.length() - prefix.length() - 1);
m_texture_3_path = data;
}
else if (prefix == "texture_4_path") {
data = line.substr(prefix.length() + 1, line.length() - prefix.length() - 1);
m_texture_4_path = data;
}
else if (prefix == "texture_5_path") {
data = line.substr(prefix.length() + 1, line.length() - prefix.length() - 1);
m_texture_5_path = data;
}
else if (prefix == "reflections") {
str >> m_iterations;
}
else if (prefix == "samples") {
str >> m_samples_per_frame;
}
else if (prefix == "fov") {
str >> m_fov;
}
else if (prefix == "sensitivity") {
str >> m_camera_sensitivity;
}
else if (prefix == "camera_position") {
str >> x >> y >> z;
m_camera_position = { x, y, z };
}
else if (prefix == "camera_rotation") {
str >> x >> y >> z;
m_camera_rotation = { x, y, z };
}
else if (prefix == "model") {
reading_object = true;
m_objects.push_back(SceneObject());
}
else if (prefix.find("object_") != -1) {
data = prefix.substr(7, prefix.length() - 6 - 1);
int id = stoi(data);
m_models.push_back(Model3D());
m_models.back().SetId(id);
data = line.substr(prefix.length() + 1, line.length() - prefix.length() - 1);
m_models.back().Load(data);
}
else if (prefix == "model") {
reading_object = true;
m_objects.push_back(SceneObject());
}
else if (prefix == "obj_id") {
str >> ix;
m_objects.back().type = 2;
m_objects.back().obj_id = ix;
}
else if (prefix == "texture_albedo") {
str >> ix;
m_objects.back().texture_id[0] = ix;
}
else if (prefix == "texture_specular") {
str >> ix;
m_objects.back().texture_id[1] = ix;
}
else if (prefix == "texture_emission") {
str >> ix;
m_objects.back().texture_id[3] = ix;
}
else if (prefix == "position") {
str >> x >> y >> z;
m_objects.back().position = { x, y, z };
}
else if (prefix == "rotation") {
str >> x >> y >> z;
m_objects.back().orientation = { x, y, z };
}
else if (prefix == "size") {
str >> x >> y >> z;
m_objects.back().size = { x, y, z };
}
else if (prefix == "albedo") {
str >> x >> y >> z;
m_objects.back().albedo = { x, y, z };
}
else if (prefix == "specular") {
str >> x >> y >> z;
m_objects.back().specular = { x, y, z };
}
else if (prefix == "emission") {
str >> x >> y >> z;
m_objects.back().emission = { x, y, z };
}
else if (prefix == "smoothness") {
str >> x;
m_objects.back().smoothness = x;
}
else if (prefix == "refractive_index") {
str >> x;
m_objects.back().refractive_index = x;
}
else if (prefix == "transparency") {
str >> x;
m_objects.back().transparency = x;
}
else if (prefix == "type") {
data = line.substr(prefix.length() + 1, line.length() - prefix.length() - 1);
if (data == "sphere")
m_objects.back().type = 0;
else if (data == "plane")
m_objects.back().type = 1;
}
}
for (int i = 0; i < m_models.size(); i++)
m_buffer.AddModel(&m_models[i]);
m_buffer.FillBuffers();
for (int i = 0; i < m_objects.size(); i++) {
if (m_objects[i].type == 2) {
// find object
for (int j = 0; j < m_models.size(); j++)
if (m_models[j].GetId() == m_objects[i].obj_id) {
// set offsets
m_objects[i].offset = m_models[j].GetIndexOffset();
m_objects[i].vert_num = m_models[j].GetFaceCount();
}
}
}
return true;
}
bool Config::BindTextures(Program& program)
{
if (m_texture_sky_path != "") {
m_tex_sky = new Texture("u_skybox", m_texture_sky_path);
}
if (m_texture_1_path != "") {
m_tex_1 = new Texture("u_tex1", m_texture_1_path);
}
if (m_texture_2_path != "") {
m_tex_2 = new Texture("u_tex2", m_texture_2_path);
}
if (m_texture_3_path != "") {
m_tex_3 = new Texture("u_tex3", m_texture_3_path);
}
if (m_texture_4_path != "") {
m_tex_4 = new Texture("u_tex4", m_texture_4_path);
}
if (m_texture_5_path != "") {
m_tex_5 = new Texture("u_tex5", m_texture_5_path);
}
if (m_texture_sky_path != "") {
program.BindTexture(m_tex_sky, 0);
}
if (m_texture_1_path != "") {
program.BindTexture(m_tex_1, 1);
}
if (m_texture_2_path != "") {
program.BindTexture(m_tex_2, 2);
}
if (m_texture_3_path != "") {
program.BindTexture(m_tex_3, 3);
}
if (m_texture_4_path != "") {
program.BindTexture(m_tex_4, 4);
}
if (m_texture_5_path != "") {
program.BindTexture(m_tex_5, 5);
}
return true;
}
std::vector<int>* Config::GetIndexBuffer() {
return m_buffer.GetIndexBuffer();
}
std::vector<float>* Config::GetTextureBuffer() {
return m_buffer.GetTextureBuffer();
}
std::vector<float>* Config::GetVertexBuffer() {
return m_buffer.GetVertexBuffer();
}

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#pragma once
#include "DataStructures.h"
#include "ComputeEngine.h"
class Config {
public:
SceneVertices m_buffer;
std::vector<Model3D> m_models;
std::vector<SceneObject> m_objects;
std::vector<Texture> m_textures;
std::string m_window_name = "Window";
int m_window_width = 512;
int m_window_height = 512;
bool m_start_focused = true;
std::string m_pixel_shader_path = "";
std::string m_object_shader_path = "";
int m_iterations = 5;
int m_samples_per_frame = 1;
int m_fov = 30;
float m_camera_sensitivity = 10.0f;
std::array<float, 3> m_camera_position = { 0, 0, 0 };
std::array<float, 3> m_camera_rotation = { 0, 0, 0 };
std::string m_texture_sky_path = "";
std::string m_texture_1_path = "";
std::string m_texture_2_path = "";
std::string m_texture_3_path = "";
std::string m_texture_4_path = "";
std::string m_texture_5_path = "";
Texture* m_tex_sky = (Texture*)(nullptr);
Texture* m_tex_1 = (Texture*)(nullptr);
Texture* m_tex_2 = (Texture*)(nullptr);
Texture* m_tex_3 = (Texture*)(nullptr);
Texture* m_tex_4 = (Texture*)(nullptr);
Texture* m_tex_5 = (Texture*)(nullptr);
bool LoadConfigFile(std::string path);
bool BindTextures(Program& program);
std::vector<int>* GetIndexBuffer();
std::vector<float>* GetTextureBuffer();
std::vector<float>* GetVertexBuffer();
std::vector<SceneObject>* GetObjects();
int GetVertexCount();
int GetFaceCount();
int GetObjectCount();
Config(std::string path);
Config();
};

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#define _USE_MATH_DEFINES
#include <DataStructures.h>
#include <vector>
#include <array>
#include <math.h>
#include <cmath>
#include <string>
#include <iostream>
void CameraData::AccelerateCamera(float acc[3]) {
for (int i = 0; i < 3; i++)
acceleration[i] += acc[i] * acc_mul;
}
void CameraData::RotateCamera(float dx, float dy) {
rotation[1] += dx * sensitivity * (500.0f/m_width);
if (rotation[0] + dy * sensitivity * (500.0f / m_width) < -90)
rotation[0] = -90;
else if (rotation[0] + dy * sensitivity * (500.0f / m_width) > 90)
rotation[0] = 90;
else
rotation[0] += dy * sensitivity * (500.0f / m_width);
rotation[1] = (float)fmod(rotation[1], 360);
if((abs(dx) > 0.0001f) || (abs(dy) > 0.0001f))
m_changed = true;
}
void CameraData::CopyData(ShaderData& shader_data) {
shader_data._camera_position = { position[0], position[1], position[2], 0 };
shader_data._camera_rotation = { rotation[0], rotation[1], rotation[2], 0 };
}
bool CameraData::HasChanged() {
return m_changed;
}
void CameraData::SetChanged(bool ch) {
m_changed = ch;
}
float DegToRad(float deg) {
return (float)(deg * (M_PI / 180.0f));
}
void CameraData::UpdateCameraData(float time) {
std::vector<std::vector<float>> move_vectors;
std::vector<float> forward = { -sin(DegToRad(rotation[1])), sin(DegToRad(rotation[0])), cos(DegToRad(rotation[1])) };
std::vector<float> up = { 0, 1.0f, 0 };
std::vector<float> right = { cos(DegToRad(rotation[1])), 0, sin(DegToRad(rotation[1])) };
move_vectors.push_back(right);
move_vectors.push_back(up);
move_vectors.push_back(forward);
//update position
for (int i = 0; i < 3; i++) {
temp[0] = position[i];
temp[1] = rotation[i];
// calculate accelleration
float accel = 0;
for (int x = 0; x < 3; x++)
accel += acceleration[x] * move_vectors[x][i];
velocity[i] += accel * time;
position[i] += velocity[i] * time;
// apply friction
float sum = abs(velocity[0]) + abs(velocity[1]) + abs(velocity[2]);
float part_friction = abs((velocity[i] / sum)) * friction;
if (sum != 0) {
if (velocity[i] > 0) {
if (part_friction * time > velocity[i])
velocity[i] = 0;
else
velocity[i] -= part_friction * time;
}
else if (velocity[i] < 0) {
if (part_friction * time < velocity[i])
velocity[i] = 0;
else
velocity[i] += part_friction * time;
}
position[i] += velocity[i] * time;
}
if ((temp[0] != position[i]) || (temp[1] != rotation[i]))
m_changed = true;
}
// reset acceleration
for (int i = 0; i < 3; i++)
acceleration[i] = 0;
// scale velocity to max velocity
float length = sqrt(pow(velocity[0], 2) + pow(velocity[1], 2) + pow(velocity[2], 2));
float scaling = 1.0f;
if (length > max_v) {
scaling = ((length - max_v) / max_v) + 1.0f;
for(int i = 0; i < 3; i++)
velocity[i] /= scaling;
}
}
void ShaderData::UpdateSeed() {
_seed = GetRand();
}
void ShaderData::UpdateWindowSize(int width, int height) {
_screen_size[0] = width;
_screen_size[1] = height;
}
void ShaderData::GetWindowSize(int& width, int& height) {
width = _screen_size[0];
height = _screen_size[1];
}
int ShaderData::GetWidth() {
return _screen_size[0];
}
int ShaderData::GetHeight() {
return _screen_size[1];
}
void CameraData::UpdateWindowSize(int width, int height) {
m_width = width;
m_height = height;
}

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#pragma once
#include <array>
#include <string>
#include <Utils.h>
struct ShaderData
{
public:
std::array<float, 4> _camera_position = { 0, 0, 0, 0 };
std::array<float, 4> _camera_rotation = { 0, 0, 0, 0 };
std::array<float, 2> _pixel_offset = { 0.5f, 0.5f };
std::array<int, 2> _screen_size = { 0, 0 };
int _iterations = 5;
float _seed = GetRand();
int _objectcount = 0;
int _sample = 1;
int _samples = 1;
int _fov = 30;
std::array<float, 2> _padding = { 0, 0};
void UpdateSeed();
void UpdateWindowSize(int width, int height);
void GetWindowSize(int& width, int& height);
int GetWidth();
int GetHeight();
};
struct CameraData {
std::array<float, 3> velocity = { 0, 0, 0 };
std::array<float, 3> position = { 0, 0, 0 };
std::array<float, 3> rotation = { 0, 0, 0 };
std::array<float, 3> acceleration = { 0, 0, 0 };
float max_v = 30.0f;
float friction = 30.0f;
float acc_mul = 50.0f;
bool m_changed = false;
bool breakk = false;
float sensitivity = 3.0f;
int m_width = 0, m_height = 0;
void AccelerateCamera(float acc[3]);
void RotateCamera(float dx, float dy);
void CopyData(ShaderData& shader_data);
bool HasChanged();
void SetChanged(bool ch);
float temp[2] = {0, 0};
void UpdateCameraData(float time);
void UpdateWindowSize(int width, int height);
};
struct SceneObject {
std::array<float, 4> position = { 0, 0, 0, 0 };
std::array<float, 4> size = { 1, 1, 1, 1 };
std::array<float, 4> orientation = { 0, 0, 0, 0 };
std::array<float, 4> albedo = { 1, 1, 1, 1 };
std::array<float, 4> specular = { 0, 0, 0, 0 };
std::array<float, 4> emission = { 0, 0, 0, 0 };
//0 - diffuse
//1 - specular
//2 - normal
//3 - emission
std::array<int, 4> texture_id = { 0, 0, 0, 0 };
float refractive_index = 1;
float transparency = 0;
float smoothness = 0;
int type = 0;
int offset = 0;
int vert_num = 0;
int obj_id = 0;
int padding = 0;
};

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#include "Utils.h"
float GetRand() {
return (float)((double)rand() / (RAND_MAX));
}
bool FileExists(const std::string& name) {
struct stat buffer;
return (stat(name.c_str(), &buffer) == 0);
}

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#pragma once
#include <iostream>
#define LOG_ERROR(msg) \
std::cout << '[' << __TIME__ << "] ERROR: " << msg << std::endl
float GetRand();
bool FileExists(const std::string& name);

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#include <array>
#include <string>
#include <vector>
#include <iostream>
#include <ComputeEngine.h>
#include "Utils.h"
#include "DataStructures.h"
#include "Config.h"
#define UPDATE_OBJECT_BUFFERS 0
void UpdateKeys(ComputeEngine& renderer, CameraData& camera, std::vector<SceneObject>& objects, ShaderData& shader_data, Texture& tex_output) {
if (renderer.IsKeyClicked(GLFW_KEY_P)) {
renderer.SwitchInput();
}
if (renderer.GetInput()) {
if (renderer.IsKeyPressed(GLFW_KEY_W))
camera.AccelerateCamera(new float[3]{ 0, 0, 1.0f });
if (renderer.IsKeyPressed(GLFW_KEY_A))
camera.AccelerateCamera(new float[3]{ -1.0f, 0, 0 });
if (renderer.IsKeyPressed(GLFW_KEY_S))
camera.AccelerateCamera(new float[3]{ 0, 0, -1.0f });
if (renderer.IsKeyPressed(GLFW_KEY_D))
camera.AccelerateCamera(new float[3]{ 1.0f, 0, 0 });
if (renderer.IsKeyPressed(GLFW_KEY_SPACE))
camera.AccelerateCamera(new float[3]{ 0, 1.0f, 0 });
if (renderer.IsKeyPressed(GLFW_KEY_LEFT_CONTROL))
camera.AccelerateCamera(new float[3]{ 0, -1.0f, 0 });
if (renderer.IsKeyPressed(GLFW_KEY_E)) {
}
if (renderer.IsKeyPressed(GLFW_KEY_Q)) {
}
if (renderer.IsKeyClicked(GLFW_KEY_F11)) {
renderer.SwitchFullScreen();
}
if (renderer.IsKeyClicked(GLFW_KEY_ESCAPE))
renderer.CloseWindow();
if (renderer.IsKeyClicked(GLFW_KEY_L)) {
renderer.SaveScreen("screenshot");
}
}
int width, height;
shader_data.GetWindowSize(width, height);
renderer.GetWindowSize(shader_data._screen_size[0], shader_data._screen_size[1]);
if (width != shader_data.GetWidth() || height != shader_data.GetHeight())
tex_output.Resize(shader_data.GetWidth(), shader_data.GetHeight());
}
void UpdateInput(ComputeEngine& renderer, CameraData& camera, std::vector<SceneObject>& objects, ShaderData& shader_data, Texture& tex_output) {
renderer.PollEvents();
UpdateKeys(renderer, camera, objects, shader_data, tex_output);
double dx, dy;
renderer.GetMouseDelta(dx, dy);
dx *= (renderer.GetFrametime() / 1000.0);
dy *= (renderer.GetFrametime() / 1000.0);
double xp, yp;
int w, h;
renderer.GetWindowSize(w, h);
renderer.GetMousePos(xp, yp);
bool in_window = xp > 0 && yp > 0 && xp < w && yp < h;
if (renderer.IsMouseButtonClicked(GLFW_MOUSE_BUTTON_1) && !renderer.GetInput())
{
renderer.SetInput(true);
}
camera.RotateCamera((float)dx, (float)dy);
camera.UpdateCameraData((float)(renderer.GetFrametime() / 1000.0));
}
int main(int argc, char** argv)
{
srand((unsigned)time(0));
std::string config_filename = "configs/config.txt";
if (argc > 1)
config_filename = argv[1];
if (!FileExists(config_filename)) {
LOG_ERROR(config_filename + " does not exist");
return -1;
}
std::cout << "config file name: " << config_filename << std::endl;
Config config(config_filename);
int width = config.m_window_width;
int height = config.m_window_height;
// init renderer
ComputeEngine renderer(width, height, config.m_window_name, config.m_start_focused, true);
Shader pixel_compute_shader(config.m_pixel_shader_path);
if (!pixel_compute_shader.Compiled()) {
LOG_ERROR("shader compilation fail");
return -1;
}
Program pixel_compute_program(pixel_compute_shader);
// init data for shader
ShaderData shader_data = {};
shader_data._screen_size = { width, height };
shader_data._iterations = config.m_iterations;
shader_data._samples = config.m_samples_per_frame;
shader_data._fov = config.m_fov;
// init textures
Texture tex_output("img_output", width, height);
// bind textures
pixel_compute_program.BindTextureImage(tex_output, 0);
config.BindTextures(pixel_compute_program);
// init buffers
UBO data_buffer(2);
UBO objects_buffer(3);
SSBO index_buffer(4);
SSBO vert_buffer(5);
SSBO texture_vert_buffer(6);
// fill buffers with data
data_buffer.Set(&shader_data);
objects_buffer.Set(config.GetObjects());
index_buffer.Set(config.GetIndexBuffer());
vert_buffer.Set(config.GetVertexBuffer());
texture_vert_buffer.Set(config.GetTextureBuffer());
// init camera
CameraData camera;
camera.position = config.m_camera_position;
camera.rotation = config.m_camera_rotation;
camera.sensitivity = config.m_camera_sensitivity;
camera.m_width = width;
camera.m_height = height;
camera.CopyData(shader_data);
printf("faces: %d\nvertices: %d\nobjects: %d\n", config.GetFaceCount(), config.GetVertexCount(), config.GetObjectCount());
while (!renderer.ShouldClose()) {
// update input
camera.SetChanged(false);
UpdateInput(renderer, camera, *config.GetObjects(), shader_data, tex_output);
// update data for shader
if (camera.HasChanged()) {
shader_data._sample = 1;
shader_data._pixel_offset = { 0.5f, 0.5f };
}
else {
shader_data._sample++;
shader_data._pixel_offset = { (GetRand() - 0.5f), (GetRand() - 0.5f) };
}
shader_data.UpdateSeed();
shader_data._objectcount = config.GetObjectCount();
camera.UpdateWindowSize(shader_data.GetWidth(), shader_data.GetHeight());
camera.CopyData(shader_data);
// update buffers
data_buffer.Update(&shader_data);
#if UPDATE_OBJECT_BUFFERS
objects_buffer.Update(config.GetObjects());
index_buffer.Update(config.GetIndexBuffer());
vert_buffer.Update(config.GetVertexBuffer());
texture_vert_buffer.Update(config.GetTextureBuffer());
#endif
// dispatch compute shader
pixel_compute_program.DispatchCompute(shader_data.GetWidth(), shader_data.GetHeight());
renderer.UpdateFrametime();
// draw rendered image
renderer.DrawTexture(tex_output);
// glFinish call
renderer.Finish();
//print frametime every 50 frames
if(renderer.GetFramecount()%50 == 0)
printf("f:%.2fms w:%d h:%d samples:%d\n", renderer.GetFrametime(), renderer.GetWidth(), renderer.GetHeight(), shader_data._sample * shader_data._samples);
}
//print average frametime
printf("average frametime: %.3fms", renderer.GetAverageFrametime());
return 0;
}