79 lines
2.9 KiB
C++
79 lines
2.9 KiB
C++
//
|
|
// KRTriangle.h
|
|
// Kraken Engine / Hydra
|
|
//
|
|
// Copyright 2022 Kearwood Gilbert. All rights reserved.
|
|
//
|
|
// Redistribution and use in source and binary forms, with or without modification, are
|
|
// permitted provided that the following conditions are met:
|
|
//
|
|
// 1. Redistributions of source code must retain the above copyright notice, this list of
|
|
// conditions and the following disclaimer.
|
|
//
|
|
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
|
|
// of conditions and the following disclaimer in the documentation and/or other materials
|
|
// provided with the distribution.
|
|
//
|
|
// THIS SOFTWARE IS PROVIDED BY KEARWOOD GILBERT ''AS IS'' AND ANY EXPRESS OR IMPLIED
|
|
// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
|
|
// FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL KEARWOOD GILBERT OR
|
|
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
|
|
// ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
|
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
|
|
// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
//
|
|
// The views and conclusions contained in the software and documentation are those of the
|
|
// authors and should not be interpreted as representing official policies, either expressed
|
|
// or implied, of Kearwood Gilbert.
|
|
//
|
|
|
|
#pragma once
|
|
|
|
#include "vector3.h"
|
|
|
|
namespace hydra {
|
|
|
|
class Triangle3
|
|
{
|
|
public:
|
|
Vector3 vert[3];
|
|
|
|
void init(const Triangle3& tri);
|
|
void init(const Vector3& v1, const Vector3& v2, const Vector3& v3);
|
|
static Triangle3 Create(const Triangle3& tri);
|
|
static Triangle3 Create(const Vector3& v1, const Vector3& v2, const Vector3& v3);
|
|
|
|
Vector3 calculateNormal() const;
|
|
|
|
bool operator ==(const Triangle3& b) const;
|
|
bool operator !=(const Triangle3& b) const;
|
|
Vector3& operator[](unsigned int i);
|
|
Vector3 operator[](unsigned int i) const;
|
|
|
|
bool rayCast(const Vector3& start, const Vector3& dir, Vector3& hit_point) const;
|
|
bool sphereCast(const Vector3& start, const Vector3& dir, float radius, Vector3& hit_point, float& hit_distance) const;
|
|
|
|
bool containsPoint(const Vector3& p) const;
|
|
Vector3 closestPointOnTriangle(const Vector3& p) const;
|
|
};
|
|
static_assert(std::is_pod<Triangle3>::value, "hydra::Triangle3 must be a POD type.");
|
|
|
|
} // namespace hydra
|
|
|
|
namespace std {
|
|
template<>
|
|
struct hash<hydra::Triangle3>
|
|
{
|
|
public:
|
|
size_t operator()(const hydra::Triangle3& s) const
|
|
{
|
|
size_t h1 = hash<hydra::Vector3>()(s.vert[0]);
|
|
size_t h2 = hash<hydra::Vector3>()(s.vert[1]);
|
|
size_t h3 = hash<hydra::Vector3>()(s.vert[2]);
|
|
return h1 ^ (h2 << 1) ^ (h3 << 2);
|
|
}
|
|
};
|
|
} // namespace std
|