86 lines
2.2 KiB
C++
86 lines
2.2 KiB
C++
// Copyright (c) 2012-2024 Wojciech Figat. All rights reserved.
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#pragma once
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#include "Vector3.h"
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#include "CollisionsHelper.h"
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/// <summary>
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/// Represents a three-dimensional triangle.
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/// </summary>
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struct FLAXENGINE_API Triangle
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{
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public:
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/// <summary>
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/// The first vertex.
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/// </summary>
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Vector3 V0;
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/// <summary>
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/// The second vertex.
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/// </summary>
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Vector3 V1;
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/// <summary>
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/// The third vertex.
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/// </summary>
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Vector3 V2;
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public:
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/// <summary>
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/// Empty constructor.
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/// </summary>
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Triangle() = default;
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/// <summary>
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/// Initializes a new instance of the <see cref="Triangle"/> struct.
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/// </summary>
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/// <param name="v0">The first vertex.</param>
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/// <param name="v1">The second vertex .</param>
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/// <param name="v2">The third vertex.</param>
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Triangle(const Vector3& v0, const Vector3& v1, const Vector3& v2)
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: V0(v0)
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, V1(v1)
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, V2(v2)
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{
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}
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public:
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Vector3 GetNormal() const
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{
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return Vector3::Normalize((V1 - V0) ^ (V2 - V0));
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}
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public:
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// Determines if there is an intersection between triangle and a ray.
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bool Intersects(const Ray& ray) const
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{
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Real distance;
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return CollisionsHelper::RayIntersectsTriangle(ray, V0, V1, V2, distance);
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}
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/// Determines if there is an intersection between triangle and a ray. Returns distance to the intersection.
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bool Intersects(const Ray& ray, Real& distance) const
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{
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return CollisionsHelper::RayIntersectsTriangle(ray, V0, V1, V2, distance);
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}
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// Determines if there is an intersection between triangle and a ray. Returns distance to the intersection and surface normal vector.
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bool Intersects(const Ray& ray, Real& distance, Vector3& normal) const
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{
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return CollisionsHelper::RayIntersectsTriangle(ray, V0, V1, V2, distance, normal);
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}
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// Determines if there is an intersection between triangle and a ray. Returns point of intersection.
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bool Intersects(const Ray& ray, Vector3& point) const
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{
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return CollisionsHelper::RayIntersectsTriangle(ray, V0, V1, V2, point);
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}
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};
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template<>
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struct TIsPODType<Triangle>
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{
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enum { Value = true };
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};
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