GitHub - 20k/OpenCLRenderer: 3D renderer built in C++/OpenCL

Branches Tags

Name		Name	Last commit message	Last commit date
Latest commit History 1,222 Commits
Game		Game
Interface_DLL		Interface_DLL
Leap		Leap
Rift		Rift
SVO		SVO
cloud_gen		cloud_gen
objects		objects
planet_gen		planet_gen
smoke		smoke
terrain_gen		terrain_gen
.hgignore		.hgignore
async_read.hpp		async_read.hpp
camera_effects.cpp		camera_effects.cpp
camera_effects.hpp		camera_effects.hpp
cl2.cl		cl2.cl
cl_gl_interop_texture.cpp		cl_gl_interop_texture.cpp
cl_gl_interop_texture.hpp		cl_gl_interop_texture.hpp
clstate.cpp		clstate.cpp
clstate.h		clstate.h
controls.cpp		controls.cpp
controls.hpp		controls.hpp
engine.cpp		engine.cpp
engine.hpp		engine.hpp
goo.cpp		goo.cpp
goo.hpp		goo.hpp
hologram.cpp		hologram.cpp
hologram.hpp		hologram.hpp
interact_manager.cpp		interact_manager.cpp
interact_manager.hpp		interact_manager.hpp
light.cpp		light.cpp
light.hpp		light.hpp
logging.cpp		logging.cpp
logging.hpp		logging.hpp
main.cpp		main.cpp
network.cpp		network.cpp
network.hpp		network.hpp
obj_g_descriptor.hpp		obj_g_descriptor.hpp
obj_info_struct.cpp		obj_info_struct.cpp
obj_info_struct.hpp		obj_info_struct.hpp
obj_load.cpp		obj_load.cpp
obj_load.hpp		obj_load.hpp
object.cpp		object.cpp
object.hpp		object.hpp
object_context.cpp		object_context.cpp
object_context.hpp		object_context.hpp
objects_container.cpp		objects_container.cpp
objects_container.hpp		objects_container.hpp
ocl.cpp		ocl.cpp
ocl.h		ocl.h
pfix.cbp		pfix.cbp
point_cloud.cpp		point_cloud.cpp
point_cloud.hpp		point_cloud.hpp
proj.hpp		proj.hpp
projectile_buffer_gen.cpp		projectile_buffer_gen.cpp
projectile_buffer_gen.hpp		projectile_buffer_gen.hpp
readme.txt		readme.txt
settings_loader.cpp		settings_loader.cpp
settings_loader.hpp		settings_loader.hpp
smoke.cpp		smoke.cpp
smoke.hpp		smoke.hpp
text_handler.cpp		text_handler.cpp
text_handler.hpp		text_handler.hpp
texture.cpp		texture.cpp
texture.hpp		texture.hpp
texture_context.cpp		texture_context.cpp
texture_context.hpp		texture_context.hpp
triangle.cpp		triangle.cpp
triangle.hpp		triangle.hpp
ui_manager.cpp		ui_manager.cpp
ui_manager.hpp		ui_manager.hpp
util.hpp		util.hpp
vec.hpp		vec.hpp
vertex.cpp		vertex.cpp
vertex.hpp		vertex.hpp

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This is an implementation of a deferred 3D renderer written in C++, and OpenCL for the heavy 3D triangle rendering. Some OpenGL is used to create shared framebuffers that can be blitted to the screen, as well as using SFML for a wrapper for context creation

Performance on the sponza atrium scene is 6ms/frame @1680x1050 on a 390, with one light and smoothed shadows

As I use this as a general 3d toolkit, many other tools irrelevant things are integrated in (with varying levels of support and brokenness), including gpu accelerated smoke simulation, a marching cubes implementation, as well as galaxy generation, and a very basic vector library for the opencl types. Most things under /game are too old to be of use. The way I use this has also changed from integrated projects in-engine, to projects being external to the engine, so no more crufty side-projects should accumulate

The engine has come quite a long way in 5 years now, however this has left it with a few code issues that need to be cleared up. OpenCL code is located in cl2.cl, with the main render pipeling being prearrange/kernel1/kernel2/kernel3. Additionally I am building a (currently functional) game under the /SwordFight repo

Brief Overview:

There are 4 main kernels. Prearrange culls tris, projects them into screenspace, and chops them up into a number of fixed sized chunks. Kernel 1 interpolates depth, and renders these fixed sized chunks to the depth buffer. Kernel 2 does exactly the same as kernel 1, except upon confirming that the depth value in the buffer is what you expect, writes the id of the chunk (it is not faster to use 64bit atomics to mash these into one kernel). Kernel 3 is the screenspace deferred step, performing texturing (including hand implemented mipmapping, though no anisotropic filtering yet), lighting (phong or preferably cook-torrence, with the former being a poor fallback), with optional normal mapping and SSAO. 

At the moment the renderer is focused around standard rendering techniques, but will eventually branch out into novel areas

Objects for sponza scene can be downloaded from 

https://dl.dropboxusercontent.com/u/9317774/Sp2.7z

Extract to /sp2