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| author | Dan Goodliffe <dan@randomdan.homeip.net> | 2024-10-17 18:26:24 +0100 |
|---|---|---|
| committer | Dan Goodliffe <dan@randomdan.homeip.net> | 2024-10-17 18:26:24 +0100 |
| commit | 9a43f9e749f9f51cb37dabd9c1d33f2ee9441b2f (patch) | |
| tree | f701bb3b75d4207c40557dd502fb85df9740615e /gfx/gl | |
| parent | Remove magic number for stencil view angles (diff) | |
| download | ilt-9a43f9e749f9f51cb37dabd9c1d33f2ee9441b2f.tar.bz2 ilt-9a43f9e749f9f51cb37dabd9c1d33f2ee9441b2f.tar.xz ilt-9a43f9e749f9f51cb37dabd9c1d33f2ee9441b2f.zip | |
Re-express viewProjections calculations as a fold expression
Diffstat (limited to 'gfx/gl')
| -rw-r--r-- | gfx/gl/shadowStenciller.cpp | 10 | ||||
| -rw-r--r-- | gfx/gl/shadowStenciller.h | 4 |
2 files changed, 8 insertions, 6 deletions
diff --git a/gfx/gl/shadowStenciller.cpp b/gfx/gl/shadowStenciller.cpp index 55ad8e1..89b61cc 100644 --- a/gfx/gl/shadowStenciller.cpp +++ b/gfx/gl/shadowStenciller.cpp @@ -10,8 +10,6 @@ #include "maths.h" #include <stdexcept> -template<typename T> constexpr T STENCIL_ANGLES = 8; - ShadowStenciller::ShadowStenciller() : shadowCaster {shadowStencil_vs, shadowStencil_gs, shadowStencil_fs}, viewProjections {} { @@ -24,9 +22,11 @@ ShadowStenciller::ShadowStenciller() : void ShadowStenciller::setLightDirection(const LightDirection & lightDir) { - viewProjections = std::array<float, 8> {0, 1, 2, 3, 4, 5, 6, 7} * [&lightDir](const auto & ep) { - return rotate_pitch(half_pi - lightDir.position().y) * rotate_yaw((ep * quarter_pi) - lightDir.position().x); - }; + viewProjections = [&lightDir]<GLint... Ep>(std::integer_sequence<GLint, Ep...>) { + constexpr float STEP = two_pi / STENCIL_ANGLES<decltype(two_pi)>; + return std::array { + rotate_pitch(half_pi - lightDir.position().y) * rotate_yaw((Ep * STEP) - lightDir.position().x)...}; + }(std::make_integer_sequence<GLint, STENCIL_ANGLES<GLint>>()); } glTexture diff --git a/gfx/gl/shadowStenciller.h b/gfx/gl/shadowStenciller.h index 03efced..ac83eb1 100644 --- a/gfx/gl/shadowStenciller.h +++ b/gfx/gl/shadowStenciller.h @@ -9,6 +9,8 @@ class LightDirection; class ShadowStenciller { public: + template<typename T> static constexpr T STENCIL_ANGLES = 8; + ShadowStenciller(); [[nodiscard]] @@ -21,5 +23,5 @@ private: Program shadowCaster; Program::RequiredUniformLocation viewProjectionLoc {shadowCaster, "viewProjection"}; - std::array<glm::mat4, 8> viewProjections; + std::array<glm::mat4, STENCIL_ANGLES<size_t>> viewProjections; }; |