Texture and mtl support

.gitignore

@@ -13,6 +13,7 @@ material_gallery/
 
 # MkDocs — generated outputs only (website/docs/ source is tracked)
 website/site/
+docs/
 
 # Auto-copied image directories (populated by hooks.py at build time — not source)
 website/docs/assets/images/samples/

CMakeLists.txt

@@ -83,6 +83,7 @@ set(SOURCE_RAYON
     src/rayon/main.cc
     src/rayon/render/render_coordinator.cpp
     src/rayon/scenes/yaml_scene_loader.cc
+    src/rayon/scenes/texture_loader.cc
     src/rayon/gpu_renderers/renderer_cuda_device.cu
     src/rayon/gpu_renderers/cuda_raytracer.cu
     src/rayon/gpu_renderers/cuda_utils.cu
@@ -91,9 +92,7 @@ set(SOURCE_RAYON
     src/rayon/gpu_renderers/shaders/shader_golf.cu
 )
 
-if(OptiX_INCLUDE_DIR)
-    list(APPEND SOURCE_RAYON src/rayon/gpu_renderers/optix/optix_renderer.cu)
-endif()
+# Note: optix_renderer.cu is added via target_sources() below, after find_path(OptiX_INCLUDE_DIR)
 
 # Enable colored compiler output for Make builds
 if(CMAKE_GENERATOR STREQUAL "Unix Makefiles")
@@ -241,6 +240,7 @@ if(CUDA_FOUND)
         message(STATUS "OptiX SDK found: ${OptiX_INCLUDE_DIR}")
         target_include_directories(rayon PRIVATE ${OptiX_INCLUDE_DIR})
         add_definitions(-DOPTIX_FOUND)
+        target_sources(rayon PRIVATE src/rayon/gpu_renderers/optix/optix_renderer.cu)
 
         # Compile OptiX device programs (.cu → .ptx)
         # These are NOT compiled as regular CUDA — they produce PTX loaded at runtime by OptiX

TODOS.md

@@ -1,56 +1,59 @@
 # TODO List
 
-## Interactive renderer
+## CUDA renderer
+- [X] Textures loading (Venturi's style)
+- [ ] Volumetric smoke ray-marching
+- [ ] Depth map exporting
+- [ ] New sphere / point light light types
+- [ ] SDF integration in CUDA
+- [ ] SDL3 migration (won't probably fix)
+
+## General
+- [ ] Better skybox
+- [ ] Skybox as HDR, dynamic loading
+
+## Website
+- [ ] History script testing
+
+## Others things
+- [ ] Impact of different rendering optimizations reporting -> find a way and report (for instance, color complexity per pixel)
+- [ ] `sdl` texture blitting integration + performance assessment
+- [ ] Performance regression
+- [ ] Pipeline CI/CD pour runner les tests unitaires ci-dessus (si possible, besoin CUDA sur Github)
+- [ ] Profiling and low-level optimizations + document changes using `nsight-systems` and `nsight-compute`
+- [ ] Implement NVIDIA OptiX image denoising
+- [ ] Save image as OpenEXR format
+
+## Done
+
+### Interactive renderer
 - [x] Gamma correction in interactive renderer is wrong when displayed, but saved correctly -> it's related to how program handle color profiles.
 - [x] Change of speeds in interactive renderer, as they are not very nice
 - [x] Add a ray/second counter somewhere -> SPPS instead, as ray counting is too costly on gpu side
 
-## CUDA renderer
+### CUDA renderer
 - [x] Implement anisotropic metals / shading
-- [ ] SDL3 migration
 - [x] Refactor constants f3_ones, f3_zero and others
-- [ ] New sphere / point light light types
-- [ ] Textures loading (Venturi's style)
-- [ ] SDF integration in CUDA
 - [x] Time per pixel shading for performance display
 - [x] Normals as lines for spheres
-- [ ] Volumetric smoke ray-marching
 - [x] Normals color toggle for interactive renderer
-- [ ] Depth map exporting
 
-## General code organization
+### General code organization
 - [x] There are still discrepancies for the cuda renderers
     - [x] clarify renderer_cuda_host.hpp vs renderer_cuda_device.cu responsibilities
     - [x] cuda_raytracer name is badly chosen
 
-## General
-- [ ] Better skybox
-- [ ] Skybox as HDR, dynamic loading
+### General
 - [x] Doxygen documentation
 
-## Scenes
+### Scenes
 - [x] YAML scene should take camera positions
 - [x] Dynamic scenes loading
 
-## Bug fixing
-- [ ] Artifacts when rendering metallic ground (grazing angle)
-- [ ] Artifacts when rendering glass (might be related to metallic ground somehow ?)
-
-## Optimisations
+### Optimisations
 - [x] Fast maths
 
-## Bugfixing 
-- [ ] Adaptive sampling is not converging correctly in some cases, maybe can be fixed (not sure though)
-
-## Others things
+### Others things
 - [x] `ImGUI` GUI integration for controls -> reimplement existing controls + add more
 - [x] Implement benchmarks for static renderer on typical scenes (multiple renders + average)
-- [ ] Impact of different rendering optimizations reporting -> find a way and report (for instance, color complexity per pixel)
-- [ ] `sdl` texture blitting integration + performance assessment
-- [ ] Tests unitaires qui détectent les régressions dans le renderer GPU et CPU en comparant avec des scènes de référence, notamment lors d'optimisations
-- [ ] Pipeline CI/CD pour runner les tests unitaires ci-dessus (si possible, besoin CUDA sur Github)
-- [ ] Profiling and low-level optimizations + document changes using `nsight-systems` and `nsight-compute`
-- [ ] implement dynamic screen rescaling 
-- [ ] arbitrary resolution (other than 16/9) 
-- [ ] Implement NVIDIA OptiX image denoising
-- [ ] Save image as OpenEXR format
+- [x] arbitrary resolution (other than 16/9) 

resources/models/cube_uv.obj

@@ -0,0 +1,75 @@
+# Cube
+mtllib texture_test.mtl
+
+o Cube
+
+v -0.600000 0.600000 -0.600000
+v 0.600000 0.600000 -0.600000
+v 0.600000 0.600000 0.600000
+v -0.600000 0.600000 0.600000
+v -0.600000 -0.600000 0.600000
+v 0.600000 -0.600000 0.600000
+v 0.600000 -0.600000 -0.600000
+v -0.600000 -0.600000 -0.600000
+v 0.600000 -0.600000 -0.600000
+v 0.600000 -0.600000 0.600000
+v 0.600000 0.600000 0.600000
+v 0.600000 0.600000 -0.600000
+v -0.600000 -0.600000 0.600000
+v -0.600000 -0.600000 -0.600000
+v -0.600000 0.600000 -0.600000
+v -0.600000 0.600000 0.600000
+v -0.600000 -0.600000 0.600000
+v 0.600000 -0.600000 0.600000
+v 0.600000 0.600000 0.600000
+v -0.600000 0.600000 0.600000
+v 0.600000 -0.600000 -0.600000
+v -0.600000 -0.600000 -0.600000
+v -0.600000 0.600000 -0.600000
+v 0.600000 0.600000 -0.600000
+
+vt 0.000000 0.000000
+vt 1.000000 0.000000
+vt 1.000000 1.000000
+vt 0.000000 1.000000
+vt 0.000000 0.000000
+vt 1.000000 0.000000
+vt 1.000000 1.000000
+vt 0.000000 1.000000
+vt 0.000000 0.000000
+vt 1.000000 0.000000
+vt 1.000000 1.000000
+vt 0.000000 1.000000
+vt 0.000000 0.000000
+vt 1.000000 0.000000
+vt 1.000000 1.000000
+vt 0.000000 1.000000
+vt 0.000000 0.000000
+vt 1.000000 0.000000
+vt 1.000000 1.000000
+vt 0.000000 1.000000
+vt 0.000000 0.000000
+vt 1.000000 0.000000
+vt 1.000000 1.000000
+vt 0.000000 1.000000
+
+vn 0.000000 1.000000 0.000000
+vn 0.000000 -1.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn 0.000000 0.000000 1.000000
+vn 0.000000 0.000000 -1.000000
+
+usemtl textured
+f 1/1/1 2/2/1 3/3/1
+f 1/1/1 3/3/1 4/4/1
+f 5/5/2 6/6/2 7/7/2
+f 5/5/2 7/7/2 8/8/2
+f 9/9/3 10/10/3 11/11/3
+f 9/9/3 11/11/3 12/12/3
+f 13/13/4 14/14/4 15/15/4
+f 13/13/4 15/15/4 16/16/4
+f 17/17/5 18/18/5 19/19/5
+f 17/17/5 19/19/5 20/20/5
+f 21/21/6 22/22/6 23/23/6
+f 21/21/6 23/23/6 24/24/6