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Code Issues 157 Wiki Activity

perf(instancing): cache instance rotation and group lod bands linearly

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Hirek
2026-10-01 12:43:07 +02:00
parent 4eabf3c3b5
commit 2130d175e9
4 changed files with 93 additions and 78 deletions
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11
rendering/opengl33renderer.h
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@@ -428,9 +428,18 @@ class opengl33_renderer : public gfx_renderer {
std::vector<glm::mat4> m_instance_modelviews;
// further persistent scratch buffers for Render_Instanced(): culled instances paired with their
// squared distance, and the lod bounds of the drawn model which split them into lod bands
std::vector<std::pair<float, glm::mat4>> m_instance_survivors;
struct instance_survivor {
glm::mat4 modelview;
float distancesquared;
std::uint32_t band;
};
std::vector<instance_survivor> m_instance_survivors;
std::vector<float> m_instance_lodbounds;
std::vector<TSubModel const *> m_instance_lodpending;
// per lod band: first index in m_instance_modelviews (with end sentinel), fill cursor, nearest distance
std::vector<std::size_t> m_instance_bandstarts;
std::vector<std::size_t> m_instance_bandcursors;
std::vector<float> m_instance_banddistances;
gl::scene_ubs scene_ubs;
gl::model_ubs model_ubs;
gl::light_ubs light_ubs;