- gfx::pipeline gains bind_vec3/bind_float for passing arbitrary
uniforms to shaders (used for light position/color)
- scene base gains on_mouse_drag virtual hook; cuber.cpp polls
left-mouse delta each frame and forwards it to the active scene
- cornell_box scene: 5-wall room (red/green/white), two pre-rotated
white boxes with proportions from the original paper, an unlit
ceiling light panel, and a point-light Lambert shader
- left-click drag orbits the camera around the scene origin;
pitch is clamped to ±80° to prevent gimbal flip
- key 3 / --scene cornell_box selects the scene
- Extract scenes_cube/scenes_sphere (and convenience 'scenes' interface) to scenes/CMakeLists.txt.
- Main CMakeLists.txt now much cleaner (single add_subdirectory(scenes)).
- Updated help text in cuber.cpp to clearly separate Flags vs Keys (less confusing 'S' section).
- No behavior change; depth/viewport/state/post-processing fixes from earlier remain.
Followed project conventions and AGENTS.md commit rules.
Add cbt/gfx layer (pipeline + render_target) inspired by Sokol but
C++-friendly with RAII and pipeline_desc. Supports building full
graphics pipelines (VS/IA/raster/PS/OM), render-to-texture (FBO),
and post-processing steps (scene -> RT -> fullscreen quad with
sampler + vignette).
- Depth/state/viewport/texture cleanup for reliable scene switching.
- Updated cube/sphere to demonstrate (sphere uses RT+post).
- Vulkan backend easy via PIMPL in impl (same public API).
- Fixed depth test, viewport restore, and state leakage on switch.
Followed coding conventions (snake_case, trailing returns, east const,
include order, no ; after ns/class, etc.).
Added width/height tracking to the window class via a GLFW
resize callback. The callback stores the current size and
forwards it to a user-provided std::function.
Added context::set_size() to update the GL viewport when
the window is resized.
Changed scene::render() to accept (int width, int height)
parameters so scenes can compute the correct aspect ratio
for their projection matrix instead of hardcoding 1280/720.
Fixed parameter shadowing in resize_callback_impl
(glfw_window instead of window).
Each of the 6 cube-to-sphere faces now has a distinct color
(red, green, blue, yellow, magenta, cyan) passed via a
vertex color attribute. The fragment shader multiplies
lighting by this color instead of a uniform blue.
This makes the cube-face seams clearly visible when
inspecting the mapped sphere.
Added scenes/sphere.{hpp,cpp} using the cube-to-sphere
approach from nrz.cpp, but with corrected math: vertices
are simply normalized to project onto the unit sphere
(the original used a broken formula with p=50.0 as an
exponent).
The sphere uses indexed geometry with position, normal,
and UV attributes, plus a simple diffuse lighting shader.
Press 1/2 to switch between cube and sphere scenes.
Updated .gitignore to exclude generated PNG screenshots.
- Create cbt_opengl static library for OpenGL abstraction
- Create cbt_scene static library for base scene class
- Create scenes_cube static library for cube scene
- Move scene base to cbt/ (utility), scenes to root scenes/
- Link libraries in dependency chain: cuber -> scenes -> cbt_scene -> cbt_opengl
portersky