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Implement shadow mapping pipeline for terrain and models

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Kelsi 2026-02-04 16:08:35 -08:00
parent dede5a99d4
commit f17b15395d
6 changed files with 306 additions and 1 deletions
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12
include/rendering/renderer.hpp
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@ -174,6 +174,18 @@ private:
void resizePostProcess(int w, int h);
void shutdownPostProcess();
// Shadow mapping
static constexpr int SHADOW_MAP_SIZE = 2048;
uint32_t shadowFBO = 0;
uint32_t shadowDepthTex = 0;
uint32_t shadowShaderProgram = 0;
glm::mat4 lightSpaceMatrix = glm::mat4(1.0f);
void initShadowMap();
void renderShadowPass();
uint32_t compileShadowShader();
glm::mat4 computeLightSpaceMatrix();
pipeline::AssetManager* cachedAssetManager = nullptr;
uint32_t currentZoneId = 0;
std::string currentZoneName;

5
include/rendering/shader.hpp
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@ -30,6 +30,11 @@ public:
GLuint getProgram() const { return program; }
// Adopt an externally-created program (no ownership of individual shaders)
void setProgram(GLuint prog) { program = prog; }
// Release ownership without deleting (caller retains the GL program)
void releaseProgram() { program = 0; vertexShader = 0; fragmentShader = 0; }
private:
bool compile(const std::string& vertexSource, const std::string& fragmentSource);
GLint getUniformLocation(const std::string& name) const;

18
include/rendering/terrain_renderer.hpp
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@ -125,6 +125,19 @@ public:
void setFogEnabled(bool enabled) { fogEnabled = enabled; }
bool isFogEnabled() const { return fogEnabled; }
/**
* Render terrain geometry into shadow depth map
*/
void renderShadow(GLuint shaderProgram);
/**
* Set shadow map for receiving shadows
*/
void setShadowMap(GLuint depthTex, const glm::mat4& lightSpaceMat) {
shadowDepthTex = depthTex; lightSpaceMatrix = lightSpaceMat; shadowEnabled = true;
}
void clearShadowMap() { shadowEnabled = false; }
/**
* Get statistics
*/
@ -187,6 +200,11 @@ private:
// Default white texture (fallback)
GLuint whiteTexture = 0;
// Shadow mapping (receiving)
GLuint shadowDepthTex = 0;
glm::mat4 lightSpaceMatrix = glm::mat4(1.0f);
bool shadowEnabled = false;
};
} // namespace rendering