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Implement terrain shadow casting in shadow depth pass

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Add initializeShadow() to TerrainRenderer that creates a depth-only
shadow pipeline reusing the existing shadow.vert/frag shaders (same
path as WMO/M2/character renderers). renderShadow() draws all terrain
chunks with sphere culling against the shadow coverage radius. Wire
both init and draw calls into Renderer so terrain now casts shadows
alongside buildings and NPCs.
This commit is contained in:
Kelsi 2026-03-09 18:34:26 -07:00
parent 2afd455d52
commit 6a681bcf67
3 changed files with 234 additions and 6 deletions
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29
include/rendering/terrain_renderer.hpp
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@ -106,9 +106,22 @@ public:
void render(VkCommandBuffer cmd, VkDescriptorSet perFrameSet, const Camera& camera);
/**
* Render terrain into shadow depth map (Phase 6 stub)
* Initialize terrain shadow pipeline (must be called after initialize()).
* @param shadowRenderPass Depth-only render pass used for the shadow map.
*/
void renderShadow(VkCommandBuffer cmd, const glm::vec3& shadowCenter, float halfExtent);
bool initializeShadow(VkRenderPass shadowRenderPass);
/**
* Render terrain into the shadow depth map.
* @param cmd Command buffer (inside shadow render pass).
* @param lightSpaceMatrix Orthographic light-space transform.
* @param shadowCenter World-space centre of shadow coverage.
* @param shadowRadius Cull radius around shadowCenter.
*/
void renderShadow(VkCommandBuffer cmd, const glm::mat4& lightSpaceMatrix,
const glm::vec3& shadowCenter, float shadowRadius);
bool hasShadowPipeline() const { return shadowPipeline_ != VK_NULL_HANDLE; }
void clear();
@ -119,7 +132,6 @@ public:
void setFogEnabled(bool enabled) { fogEnabled = enabled; }
bool isFogEnabled() const { return fogEnabled; }
// Shadow mapping stubs (Phase 6)
void setShadowMap(VkDescriptorImageInfo /*depthInfo*/, const glm::mat4& /*lightSpaceMat*/) {}
void clearShadowMap() {}
@ -142,12 +154,21 @@ private:
VkContext* vkCtx = nullptr;
pipeline::AssetManager* assetManager = nullptr;
// Pipeline
// Main pipelines
VkPipeline pipeline = VK_NULL_HANDLE;
VkPipeline wireframePipeline = VK_NULL_HANDLE;
VkPipelineLayout pipelineLayout = VK_NULL_HANDLE;
VkDescriptorSetLayout materialSetLayout = VK_NULL_HANDLE;
// Shadow pipeline
VkPipeline shadowPipeline_ = VK_NULL_HANDLE;
VkPipelineLayout shadowPipelineLayout_ = VK_NULL_HANDLE;
VkDescriptorSetLayout shadowParamsLayout_ = VK_NULL_HANDLE;
VkDescriptorPool shadowParamsPool_ = VK_NULL_HANDLE;
VkDescriptorSet shadowParamsSet_ = VK_NULL_HANDLE;
VkBuffer shadowParamsUBO_ = VK_NULL_HANDLE;
VmaAllocation shadowParamsAlloc_ = VK_NULL_HANDLE;
// Descriptor pool for material sets
VkDescriptorPool materialDescPool = VK_NULL_HANDLE;
static constexpr uint32_t MAX_MATERIAL_SETS = 16384;