FluidSdf.h

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#pragma once
#include "common/Export.h"
 
 
#include <glm/glm.hpp>
 
#include <cstdint>
#include <vector>
 
namespace eve::fluids {
 
struct MeshSdfSample {
    float     distance = 0.f;
    glm::vec3 gradient{0.f, 1.f, 0.f};
};
 
class EVENGINE_API_DOMAINS MeshSdf {
public:
    glm::vec3 origin{0.f};
    float cellSize = 1.f;
    glm::ivec3 dims{0};
    std::vector<float> distances;
 
    int voxelCount() const;
 
    int index(int x, int y, int z) const;
 
    bool inBounds(const glm::ivec3& c) const;
 
    float sample(const glm::vec3& p) const;
 
    MeshSdfSample sampleWithGradient(const glm::vec3& p) const;
 
    glm::vec3 gradient(const glm::vec3& p) const;
 
    static MeshSdf makeSphere(const glm::vec3& center, float radius, const glm::ivec3& dims);
 
    static MeshSdf makePlane(float planeY, const glm::ivec3& dims, float halfExtent);
 
    static MeshSdf makeFromTriangles(const std::vector<glm::vec3>& positions, const std::vector<uint32_t>& indices,
                                     const glm::ivec3& dims);
};
 
}  // namespace eve::fluids