Cell - Graphics engine
======
Welcome to the development repository of Cell, an open-source OpenGL graphics engine aimed to serve as an educational repository
for learning how a larger graphics engine can be structured and organized. A large focus of Cell is building an engine that is both easy
to use and read. Cell also aims to provide both flexible and properly maintainable code. Note that this project is **not** finished, so code may still be vague nor are there proper build files yet.
The engine will be heavily commented and documented from within the source code itself, to motivate new graphics programmers
to take a look at any of its inner workings, without feeling too overwhelming.
Feature List (complete:base-functionality)
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* Fully functioning (custom) math library (vectors, matrices, transformations, utility functions):
1. Linear algebra: n-dimensional vectors, nxn-dimensional matrices, transformations, utility.
2. Trigonemetry: unit circle utility functions, radian/degree conversions.
3. Utility functions: lerp, step, smoothstep, smootherstep, clamp etc.
* Engine utility namespace:
1. High-precision performance analysis and measurement.
2. Random numbers.
0. Configure and enable debugging and logging utility.
1. Shader object w/ custom pre-processor (defines, includes):
1. Include other shader files.
2. Parse active vertex attributes and uniform variables, retrieve location and store in shader object.
3. Easy to use state configuration per shader.
4. Support multiple build paths.
2. Material pipeline; configure render state in materials, together with shader, uniform configuration and samplers used.
1. Allow for easy access of materials and storage; include set of default materials (default material, glass material etc.)
3. Define Mesh object and encompassing Model class.
1. Define set of basic shape mesh generation; plane, cube, disk, sphere, cylinder, torus (donut)
2. Load artist defined 3D models w/ Assimp.
- Note: Assimp is built as a static library that is statically linked/merged with Cell. I also built the static zlib library for the ingration to work properly with Assimp (both 32 bit).
5. Flexible Framebuffer configuration utility:
1. Including CubeMap use and generation (reflection probes, point shadow-maps)
2. Post-processing.
6. Create Render Buffer, draw commands encapsulated in push to render buffer w/ relevant state:
1. Define list of render push commands (material, mesh)
2. Collect all render commands and seperate by pass.
3. Sort render commands per pass; execute (batch where necessary) to minimize state changes.
7. Configure Deferred rendering pipeline:
1. Configure render buffer w/ geometry pass.
2. Build fully functional shaders w/ Blinn-Phong (now PBR) lighting.
3. Normal mapping.
4. Environment lighting.
5. Environment reflection support.
6. Directional shadows
7. Number of lights optimization.
8. Per-object motion blur.
8. Functioning PBR render pipeline.
1. Calculate diffuse integral and store into cubemap.
2. Prefilter environment map w/ integral and store into cubemap as diffuse integral.
3. Pre-calculate active BRDF in 2D LUT (approach by Unreal for split sum approximation).
4. Irradiance reflection probe(s): pre-calculate environment lighting approximation at any scene location.
9. Post-processing
1. HDR/Gamma/Tone-mapping
2. Bloom
3. SSR
4. Vignette
5. SSAO
10. Optimization:
1. Store material-independent uniforms in UBO; together with barely changing shader parameters.
2. Per-object Frustum culling.
3. Cache GL state.
11. GUI
1. IMGUI
Feature List (work-in-progress)
------
* Engine utility namespace:
1. Logging.
* Flexible OpenGL initialization.
1. Add Camera functionality; add multiple camera variations: FPS, FlightSim, ArcBall.
2. Configure Deferred rendering pipeline:
1. Fog.
Feature List (todo)
------
12. Skeletal animation:
1. Define Bone structure on top of current scene hierarchy system.
2. Load skeletal mesh from Assimp as skeletal hierarchy as well? Think of different design solutions that would work well in current environment.
3. Animation blending.
13. Complete code cleanup (re-factor where relevant), focussing on readability and maintainability. There are still a lot of items that do work, but could be better organized.
14. Document the entire engine, describing architectural and semantic choices where relevant. Also include a walkthrough guide describing the best file order to start reading/understanding the engine.
15. Configure cross-platform build files (there's currently 0 build support).
OpenGL C++ Graphics Engine .zip
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2023-12-31
10:31:08
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OpenGL C++ Graphics Engine .zip （292个子文件） 
glad.c 102KB imgui.cpp 468KB imgui_demo.cpp 136KB imgui_draw.cpp 118KB renderer.cpp 40KB mesh.cpp 40KB cell.cpp 26KB program.cpp 16KB PostProcessor.cpp 14KB mesh_loader.cpp 12KB shader.cpp 11KB PBR.cpp 9KB MaterialLibrary.cpp 9KB command_buffer.cpp 8KB resources.cpp 8KB scene_node.cpp 7KB Texture.cpp 6KB material.cpp 5KB texture_loader.cpp 5KB cube.cpp 5KB render_target.cpp 4KB texture_cube.cpp 4KB torus.cpp 4KB fly_camera.cpp 3KB log.cpp 3KB scene.cpp 3KB camera_frustum.cpp 3KB gl_cache.cpp 3KB shader_loader.cpp 2KB camera.cpp 2KB random.cpp 2KB sphere.cpp 2KB circle.cpp 2KB plane.cpp 1KB background.cpp 1KB program.cpp 1KB quad.cpp 1KB spherical.cpp 938B line_strip.cpp 758B pbr_test.cpp 708B polar.cpp 467B plane.cpp 411B stb_image.cpp 55B pbr_capture.cpp 45B time.cpp 18B Cell.vcxproj.filters 9KB Math.vcxproj.filters 3KB Utility.vcxproj.filters 2KB Demo.vcxproj.filters 1KB ambient.fs 3KB ambient_irradience.fs 3KB post_processing.fs 2KB point.fs 2KB directional.fs 2KB ssao.fs 2KB irradiance_capture.fs 2KB g_buffer.fs 2KB prefilter_capture.fs 1KB forward_render.fs 1KB bloom.fs 1KB integrate_brdf.fs 1KB blur_guassian.fs 1KB capture.fs 799B plasma_orb.fs 540B probe_render.fs 342B spherical_to_cube.fs 302B background.fs 223B capture_background.fs 221B custom_post_2.fs 184B down_sample.fs 182B default_blit.fs 176B custom_post_1.fs 172B shadow_cast.fs 148B light.fs 117B .gitignore 390B .gitmodules 94B reflections.glsl 4KB sampling.glsl 3KB brdf.glsl 2KB random.glsl 2KB pbr.glsl 2KB shadows.glsl 1KB uniforms.glsl 1KB constants.glsl 67B stb_image.h 227KB glad.h 212KB stb_truetype.h 149KB imgui.h 135KB glfw3.h 80KB imgui_internal.h 53KB stb_textedit.h 48KB stb_rect_pack.h 17KB vector.h 14KB khrplatform.h 10KB matrix.h 7KB renderer.h 6KB quaternion.h 6KB glfw3native.h 6KB transformation.h 5KB test_operations.h 5KB共 292 条
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