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Ben Kyd
2025-06-29 23:33:26 +01:00
parent 8e713e38e6
commit e66a2eec47
3865 changed files with 1758598 additions and 28 deletions
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108
ThirdParty/assimp/code/Geometry/GeometryUtils.cpp vendored Normal file
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/*
Open Asset Import Library (assimp)
----------------------------------------------------------------------
Copyright (c) 2006-2025, assimp team
All rights reserved.
Redistribution and use of this software in source and binary forms,
with or without modification, are permitted provided that the
following conditions are met:
* Redistributions of source code must retain the above
copyright notice, this list of conditions and the
following disclaimer.
* 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.
* Neither the name of the assimp team, nor the names of its
contributors may be used to endorse or promote products
derived from this software without specific prior
written permission of the assimp team.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"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 THE COPYRIGHT
OWNER 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.
----------------------------------------------------------------------
*/
#include "GeometryUtils.h"
#include <assimp/vector3.h>
namespace Assimp {
// ------------------------------------------------------------------------------------------------
ai_real GeometryUtils::heron( ai_real a, ai_real b, ai_real c ) {
const ai_real s = (a + b + c) * 0.5;
const ai_real area = pow((s * ( s - a ) * ( s - b ) * ( s - c ) ), static_cast<ai_real>(0.5));
return area;
}
// ------------------------------------------------------------------------------------------------
ai_real GeometryUtils::distance3D( const aiVector3D &vA, const aiVector3D &vB ) {
const ai_real lx = ( vB.x - vA.x );
const ai_real ly = ( vB.y - vA.y );
const ai_real lz = ( vB.z - vA.z );
const ai_real a = lx*lx + ly*ly + lz*lz;
const ai_real d = pow( a, static_cast<ai_real>(0.5));
return d;
}
// ------------------------------------------------------------------------------------------------
ai_real GeometryUtils::calculateAreaOfTriangle( const aiFace& face, aiMesh* mesh ) {
ai_real area = 0;
if (mesh == nullptr) {
return area;
}
const aiVector3D vA( mesh->mVertices[ face.mIndices[ 0 ] ] );
const aiVector3D vB( mesh->mVertices[ face.mIndices[ 1 ] ] );
const aiVector3D vC( mesh->mVertices[ face.mIndices[ 2 ] ] );
const ai_real a = distance3D( vA, vB );
const ai_real b = distance3D( vB, vC );
const ai_real c = distance3D( vC, vA );
area = heron( a, b, c );
return area;
}
// ------------------------------------------------------------------------------------------------
// Check whether a ray intersects a plane and find the intersection point
bool GeometryUtils::PlaneIntersect(const aiRay& ray, const aiVector3D& planePos, const aiVector3D& planeNormal, aiVector3D& pos) {
const ai_real b = planeNormal * (planePos - ray.pos);
ai_real h = ray.dir * planeNormal;
if ((h < 10e-5 && h > -10e-5) || (h = b/h) < 0)
return false;
pos = ray.pos + (ray.dir * h);
return true;
}
// ------------------------------------------------------------------------------------------------
void GeometryUtils::normalizeVectorArray(aiVector3D *vectorArrayIn, aiVector3D *vectorArrayOut, size_t numVectors) {
if (vectorArrayIn == nullptr || vectorArrayOut == nullptr) {
return;
}
for (size_t i=0; i<numVectors; ++i) {
vectorArrayOut[i] = vectorArrayIn[i].Normalize();
}
}
} // namespace Assimp

85
ThirdParty/assimp/code/Geometry/GeometryUtils.h vendored Normal file
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/*
Open Asset Import Library (assimp)
----------------------------------------------------------------------
Copyright (c) 2006-2025, assimp team
All rights reserved.
Redistribution and use of this software in source and binary forms,
with or without modification, are permitted provided that the
following conditions are met:
* Redistributions of source code must retain the above
copyright notice, this list of conditions and the
following disclaimer.
* 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.
* Neither the name of the assimp team, nor the names of its
contributors may be used to endorse or promote products
derived from this software without specific prior
written permission of the assimp team.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"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 THE COPYRIGHT
OWNER 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.
----------------------------------------------------------------------
*/
#include <assimp/types.h>
#include <assimp/mesh.h>
namespace Assimp {
// ---------------------------------------------------------------------------
/// @brief This helper class supports some basic geometry algorithms.
// ---------------------------------------------------------------------------
class ASSIMP_API GeometryUtils {
public:
/// @brief Will calculate the area of a triangle.
/// @param a The first vertex of the triangle.
/// @param b The first vertex of the triangle.
/// @param c The first vertex of the triangle.
static ai_real heron( ai_real a, ai_real b, ai_real c );
/// @brief Will compute the distance between 2 3D-vectors
/// @param vA Vector a.
/// @param vB Vector b.
/// @return The distance.
static ai_real distance3D( const aiVector3D &vA, const aiVector3D &vB );
/// @brief Will calculate the area of a triangle described by a aiFace.
/// @param face The face
/// @param mesh The mesh containing the face
/// @return The area.
static ai_real calculateAreaOfTriangle( const aiFace& face, aiMesh* mesh );
/// @brief Will calculate the intersection between a ray and a plane
/// @param ray The ray to test for
/// @param planePos A point on the plane
/// @param planeNormal The plane normal to describe its orientation
/// @param pos The position of the intersection.
/// @return true is an intersection was detected, false if not.
static bool PlaneIntersect(const aiRay& ray, const aiVector3D& planePos, const aiVector3D& planeNormal, aiVector3D& pos);
/// @brief Will normalize an array of vectors.
/// @param vectorArrayIn The incoming arra of vectors.
/// @param vectorArrayOut The normalized vectors.
/// @param numVectors The array size.
static void normalizeVectorArray(aiVector3D *vectorArrayIn, aiVector3D *vectorArrayOut, size_t numVectors);
};
} // namespace Assimp