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Fix Vulkan shadow light direction and restore ground-clutter cutout visibility

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Kelsi 2026-02-22 09:47:39 -08:00
parent bd0305f6dd
commit 2c5e0dd313
3 changed files with 12 additions and 5 deletions
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6
src/rendering/renderer.cpp
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@ -3596,12 +3596,14 @@ glm::mat4 Renderer::computeLightSpaceMatrix() {
constexpr float kShadowNearPlane = 1.0f;
constexpr float kShadowFarPlane = 600.0f;
// Use active lighting direction so shadow projection matches sun/celestial.
// Use active lighting direction so shadow projection matches main shading.
// Fragment shaders derive lighting with `ldir = normalize(-lightDir.xyz)`,
// therefore shadow rays must use -directionalDir to stay aligned.
glm::vec3 sunDir = glm::normalize(glm::vec3(-0.3f, -0.7f, -0.6f));
if (lightingManager) {
const auto& lighting = lightingManager->getLightingParams();
if (glm::length(lighting.directionalDir) > 0.001f) {
sunDir = glm::normalize(lighting.directionalDir);
sunDir = glm::normalize(-lighting.directionalDir);
}
}
// Shadow camera expects light rays pointing downward in render space (Z up).