HairCards.h

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#pragma once
#include "common/Export.h"
 
 
#include <cstdint>
#include <vector>
 
namespace eve::graphics {
 
class Graphics;
class Material;
class Mesh;
class Renderable3D;
class Shader;
class Texture;
 
namespace hair {
 
struct CardMeshData {
    std::vector<float> positions;  
    std::vector<float> normals;    
    std::vector<float> uvs;        
    std::vector<uint32_t> indices;
};
 
struct CardRoot {
    float x = 0.f, y = 0.f, z = 0.f;
    float dirX = 0.f, dirY = 1.f, dirZ = 0.f;
    float width = 0.08f;
    float length = 0.35f;
};
 
EVENGINE_API_BACKENDS CardMeshData buildCard(float width = 0.12f, float height = 0.45f);
 
EVENGINE_API_BACKENDS CardMeshData buildCardsAlongPolyline(const float *pointsXYZ, int pointCount, float width = 0.08f);
 
EVENGINE_API_BACKENDS CardMeshData buildCardsFromRoots(const CardRoot *roots, int rootCount);
 
void appendCardMesh(CardMeshData &dst, const CardMeshData &src);
 
Mesh *uploadCardMesh(Graphics *gfx, const CardMeshData &data);
 
Mesh *newCardMesh(Graphics *gfx, float width = 0.12f, float height = 0.45f);
 
void applyCardDefaults(Material &mat);
 
Material *makeCardMaterial(Graphics *gfx, Texture *albedo = nullptr, Shader *hairShader = nullptr);
 
EVENGINE_API_BACKENDS void configureCardLod(Renderable3D *renderable, Mesh *nearCards, Mesh *farProxy,
                                            float switchDistance);
 
}  // namespace hair
 
}  // namespace eve::graphics