Triangle.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "dnacalib/types/Aliases.h"
#include "dnacalib/TypeDefs.h"
 
#include <array>
 
namespace dnac {
 
class Triangle {
 
    public:
        Triangle(const fvec2& a, const fvec2& b, const fvec2& c);
        explicit Triangle(const std::array<fvec2, 3>& vertices);
 
        Triangle(const Triangle& triangle) = default;
        Triangle& operator=(const Triangle& triangle) = default;
 
        Triangle(Triangle&&) = default;
        Triangle& operator=(Triangle&& triangle) = default;
 
        fvec3 getBarycentricCoords(const fvec2& point) const;
 
        fvec2 A() const;
        fvec2 B() const;
        fvec2 C() const;
 
    private:
        fvec2 a;
        fvec2 v0;  // b-a
        fvec2 v1;  // c-a;
        float d00;  // v0 dot v0
        float d01;  // v0 dot v1
        float d11;  // v1 dot v1
        float denom;  // d00 * d11 - d01 * d01;
};
 
}  // namespace dnac