65 lines
2.6 KiB
C++
65 lines
2.6 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#pragma once
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#include "CoreMinimal.h"
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#include "2D/TextureType.h"
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#include "GraphicsDefs.h"
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#include <array>
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#define UE_API TEXTUREGRAPHENGINE_API
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enum class BoundsCorners
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{
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L0_BottomLeft,
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L0_TopLeft,
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L0_TopRight,
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L0_BottomRight,
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L1_BottomLeft,
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L1_TopLeft,
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L1_TopRight,
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L1_BottomRight
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};
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class GraphicsUtil
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{
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public:
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static UE_API Vector2 CalculateBarycentricCoordinates(const Vector2* UV, const Vector2& P);
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static UE_API Vector2 CalculateBarycentricCoordinates(const Vector3& A, const Vector3& B, const Vector3& C, const Vector3& P);
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static UE_API bool IsPointInTriangle(const Vector3& A, const Vector3& B, const Vector3& C, const Vector3& P);
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static UE_API bool IsPointInTriangle(float u, float v, float tolerance = 0.001f);
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static UE_API bool IsPointInTriangle(const Vector2& uv, float tolerance = 0.001f);
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//////////////////////////////////////////////////////////////////////////
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static UE_API Vector3 s_boundsAxis[6];
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static UE_API float SquaredDistance(const Vector3& p0, const Vector3& p1);
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static UE_API float SquaredLength(const Vector3& pt);
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static UE_API std::array<Vector3, 8> GetBoundsCorners(const FBox& bounds);
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static UE_API Vector3 GetBoundsPoint(const FBox& bounds, BoundsCorners pti);
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static UE_API FBox GetChildBounds_QuadTree(const FBox& bounds, BoundsCorners ci);
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static UE_API FBox GetChildBounds_Octree(const FBox& bounds, BoundsCorners ci);
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static UE_API bool CheckRayTriangleIntersection(const FRay& ray, const Vector3& p1, const Vector3& p2, const Vector3& p3, float& distance, Vector3& ip);
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static FORCEINLINE Vector4 ConvertTangent(const Tangent& t) { return Vector4(t.TangentX.X, t.TangentX.Y, t.TangentX.Z, t.bFlipTangentY ? -1.0f : 1.0f); }
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static FORCEINLINE FLinearColor TangentAsLinearColor(const Tangent& t) { return FLinearColor(ConvertTangent(t)); }
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static FORCEINLINE FLinearColor Vec2AsLinearColor(const Vector2& v) { return FLinearColor(v.X, v.Y, 0.0f, 0.0f); }
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static FORCEINLINE FLinearColor Vec2AsLinearColor(const FVector2f& v) { return FLinearColor(v.X, v.Y, 0.0f, 0.0f); }
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static FORCEINLINE FLinearColor Vec3AsLinearColor(const Vector3& v) { return FLinearColor(v.X, v.Y, v.Z, 0.0f); }
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static FORCEINLINE FLinearColor Vec4AsLinearColor(const Vector4& v) { return FLinearColor(v); }
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//////////////////////////////////////////////////////////////////////////
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template <typename VecType>
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static VecType Interpolate(const VecType& v0, const VecType& v1, const VecType& v2, Vector2 barycentric)
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{
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float u = barycentric.X;
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float v = barycentric.Y;
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return v0 + u * (v1 - v0) + v * (v2 - v0);
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}
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};
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#undef UE_API
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