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26501b0fd7
Ordering them before the imports in the same file was not enough: a project header on line 1 can import a module several levels down whose global module fragment already pulled in the same standard header, and that include guard does not cross the module boundary. Putting them first means the guard is set before anything can import. Skips vendored single-header libraries and anything inside an #if.
59 lines
1.8 KiB
C++
59 lines
1.8 KiB
C++
#pragma once
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#include <cstddef>
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#include <cstdint>
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#include <functional>
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#include <unordered_map>
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#include <vector>
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#include "nvrenderer/nvrenderer.h"
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struct InstanceCacheId {
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gfx::geometry_handle m_geometry;
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material_handle m_material;
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InstanceCacheId(gfx::geometry_handle geometry, material_handle material)
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: m_geometry(geometry), m_material(material) {}
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};
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template <>
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struct std::hash<InstanceCacheId> {
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std::size_t operator()(const InstanceCacheId& op) const {
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size_t hash_geometry = std::hash<uint64_t>()(op.m_geometry);
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size_t hash_material = std::hash<uint32_t>()(op.m_material);
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return hash_geometry ^ hash_material + 0x9e3779b9 + (hash_geometry << 6) +
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(hash_geometry >> 2);
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}
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};
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template <>
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struct std::equal_to<InstanceCacheId> {
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bool operator()(const InstanceCacheId& lhs,
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const InstanceCacheId& rhs) const {
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return lhs.m_geometry == rhs.m_geometry && lhs.m_material == rhs.m_material;
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}
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};
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struct InstanceCache {
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struct Instance {
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glm::mat3x4 m_transform;
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glm::mat3x4 m_transform_history;
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Instance(const glm::dmat4& transform, const glm::dmat4& transform_history)
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: m_transform(static_cast<glm::mat3x4>(glm::transpose(transform))),
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m_transform_history(
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static_cast<glm::mat3x4>(glm::transpose(transform_history))) {}
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};
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std::vector<Instance> m_instances;
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};
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struct InstanceBank {
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std::unordered_map<InstanceCacheId, InstanceCache> m_cache;
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void Clear() {
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for (auto& [id, cache] : m_cache) {
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cache.m_instances.clear();
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}
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}
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void AddInstance(gfx::geometry_handle geometry, material_handle material,
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const glm::dmat4& transform, const glm::dmat4& history) {
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auto& cache = m_cache[{geometry, material}];
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cache.m_instances.emplace_back(transform, history);
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}
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}; |