assimp/code/StandardShapes.cpp

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/*
Open Asset Import Library (ASSIMP)
----------------------------------------------------------------------
Copyright (c) 2006-2008, ASSIMP Development 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 Development 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.
----------------------------------------------------------------------
*/
/** @file Implementation of the StandardShapes class
*/
#include "../include/aiTypes.h"
#include "../include/DefaultLogger.h"
#include "../include/aiAssert.h"
#include "StandardShapes.h"
namespace Assimp {
// note - flip the face ordering
#define ADD_TRIANGLE(n0,n1,n2) \
positions.push_back(n2); \
positions.push_back(n1); \
positions.push_back(n0);
// note - we could also output full hexagons, but 3 triangles are are easier to handle
#define ADD_PENTAGON(n0,n1,n2,n3,n4) \
ADD_TRIANGLE(n0, n1, n2) \
ADD_TRIANGLE(n0, n2, n3) \
ADD_TRIANGLE(n0, n3, n4)
// note - we could also output full quads, but 2 triangles are are easier to handle
#define ADD_QUAD(n0,n1,n2,n3) \
ADD_TRIANGLE(n0, n1, n2) \
ADD_TRIANGLE(n0, n2, n3)
// ------------------------------------------------------------------------------------------------
void Subdivide(std::vector<aiVector3D>& positions)
{
// assume this to be constant - input must be a Platonic primitive!
const float fl1 = positions[0].Length();
unsigned int origSize = (unsigned int)positions.size();
for (unsigned int i = 0 ; i < origSize ; i+=3)
{
aiVector3D& tv0 = positions[i];
aiVector3D& tv1 = positions[i+1];
aiVector3D& tv2 = positions[i+2];
aiVector3D a = tv0, b = tv1, c = tv2;
aiVector3D v1 = aiVector3D(a.x+b.x, a.y+b.y, a.z+b.z).Normalize()*fl1;
aiVector3D v2 = aiVector3D(a.x+c.x, a.y+c.y, a.z+c.z).Normalize()*fl1;
aiVector3D v3 = aiVector3D(b.x+c.x, b.y+c.y, b.z+c.z).Normalize()*fl1;
tv0 = v1; tv1 = v3; tv2 = v2; // overwrite the original
ADD_TRIANGLE(v2, v1, a);
ADD_TRIANGLE(v3, v2, c);
ADD_TRIANGLE(v1, v3, b);
}
}
// ------------------------------------------------------------------------------------------------
void StandardShapes::MakeIcosahedron(aiVector3D& center,const aiVector3D& length,
std::vector<aiVector3D>& positions)
{
positions.reserve(positions.size()+60);
const float t = (1.f + 2.236067977f)/2.f;
const aiVector3D s = aiVector3D( sqrt(1.f + t*t) ) / length;
aiVector3D v0 = aiVector3D(t,1.f, 0.f)/s;
aiVector3D v1 = aiVector3D(-t,1.f, 0.f)/s;
aiVector3D v2 = aiVector3D(t,-1.f, 0.f)/s;
aiVector3D v3 = aiVector3D(-t,-1.f, 0.f)/s;
aiVector3D v4 = aiVector3D(1.f, 0.f, t)/s;
aiVector3D v5 = aiVector3D(1.f, 0.f,-t)/s;
aiVector3D v6 = aiVector3D(-1.f, 0.f,t)/s;
aiVector3D v7 = aiVector3D(-1.f, 0.f,-t)/s;
aiVector3D v8 = aiVector3D(0.f, t, 1.f)/s;
aiVector3D v9 = aiVector3D(0.f,-t, 1.f)/s;
aiVector3D v10 = aiVector3D(0.f, t,-1.f)/s;
aiVector3D v11 = aiVector3D(0.f,-t,-1.f)/s;
ADD_TRIANGLE(v0,v8,v4);
ADD_TRIANGLE(v0,v5,v10);
ADD_TRIANGLE(v2,v4,v9);
ADD_TRIANGLE(v2,v11,v5);
ADD_TRIANGLE(v1,v6,v8);
ADD_TRIANGLE(v1,v10,v7);
ADD_TRIANGLE(v3,v9,v6);
ADD_TRIANGLE(v3,v7,v11);
ADD_TRIANGLE(v0,v10,v8);
ADD_TRIANGLE(v1,v8,v10);
ADD_TRIANGLE(v2,v9,v11);
ADD_TRIANGLE(v3,v11,v9);
ADD_TRIANGLE(v4,v2,v0);
ADD_TRIANGLE(v5,v0,v2);
ADD_TRIANGLE(v6,v1,v3);
ADD_TRIANGLE(v7,v3,v1);
ADD_TRIANGLE(v8,v6,v4);
ADD_TRIANGLE(v9,v4,v6);
ADD_TRIANGLE(v10,v5,v7);
ADD_TRIANGLE(v11,v7,v5);
}
// ------------------------------------------------------------------------------------------------
void StandardShapes::MakeDodecahedron(aiVector3D& center,const aiVector3D& length,
std::vector<aiVector3D>& positions)
{
positions.reserve(positions.size()+108);
const float a = 1.f / 1.7320508f;
const float b = sqrt((3.f-2.23606797f)/6.f);
const float c = sqrt((3.f+2.23606797f)/6.f);
aiVector3D v0 = aiVector3D(a,a,a).SymMul(length);
aiVector3D v1 = aiVector3D(a,a,-a).SymMul(length);
aiVector3D v2 = aiVector3D(a,-a,a).SymMul(length);
aiVector3D v3 = aiVector3D(a,-a,-a).SymMul(length);
aiVector3D v4 = aiVector3D(-a,a,a).SymMul(length);
aiVector3D v5 = aiVector3D(-a,a,-a).SymMul(length);
aiVector3D v6 = aiVector3D(-a,-a,a).SymMul(length);
aiVector3D v7 = aiVector3D(-a,-a,-a).SymMul(length);
aiVector3D v8 = aiVector3D(b,c,0.f).SymMul(length);
aiVector3D v9 = aiVector3D(-b,c,0.f).SymMul(length);
aiVector3D v10 = aiVector3D(b,-c,0.f).SymMul(length);
aiVector3D v11 = aiVector3D(-b,-c,0.f).SymMul(length);
aiVector3D v12 = aiVector3D(c, 0.f, b).SymMul(length);
aiVector3D v13 = aiVector3D(c, 0.f, -b).SymMul(length);
aiVector3D v14 = aiVector3D(-c, 0.f, b).SymMul(length);
aiVector3D v15 = aiVector3D(-c, 0.f, -b).SymMul(length);
aiVector3D v16 = aiVector3D(0.f, b, c).SymMul(length);
aiVector3D v17 = aiVector3D(0.f, -b, c).SymMul(length);
aiVector3D v18 = aiVector3D(0.f, b, -c).SymMul(length);
aiVector3D v19 = aiVector3D(0.f, -b, -c).SymMul(length);
ADD_PENTAGON(v0, v8, v9, v4, v16);
ADD_PENTAGON(v0, v12, v13, v1, v8);
ADD_PENTAGON(v0, v16, v17, v2, v12);
ADD_PENTAGON(v8, v1, v18, v5, v9);
ADD_PENTAGON(v12, v2, v10, v3, v13);
ADD_PENTAGON(v16, v4, v14, v6, v17);
ADD_PENTAGON(v9, v5, v15, v14, v4);
ADD_PENTAGON(v6, v11, v10, v2, v17);
ADD_PENTAGON(v3, v19, v18, v1, v13);
ADD_PENTAGON(v7, v15, v5, v18, v19);
ADD_PENTAGON(v7, v11, v6, v14, v15);
ADD_PENTAGON(v7, v19, v3, v10, v11);
}
// ------------------------------------------------------------------------------------------------
void StandardShapes::MakeOctahedron(aiVector3D& center,const aiVector3D& length,
std::vector<aiVector3D>& positions)
{
positions.reserve(positions.size()+24);
aiVector3D v0 = aiVector3D(length.x, 0.f, 0.f) ;
aiVector3D v1 = aiVector3D(-length.x, 0.f, 0.f);
aiVector3D v2 = aiVector3D(0.f, length.y, 0.f);
aiVector3D v3 = aiVector3D(0.f, -length.y, 0.f);
aiVector3D v4 = aiVector3D(0.f, 0.f, length.z);
aiVector3D v5 = aiVector3D(0.f, 0.f, -length.z);
ADD_TRIANGLE(v4,v0,v2);
ADD_TRIANGLE(v4,v2,v1);
ADD_TRIANGLE(v4,v1,v3);
ADD_TRIANGLE(v4,v3,v0);
ADD_TRIANGLE(v5,v2,v0);
ADD_TRIANGLE(v5,v1,v2);
ADD_TRIANGLE(v5,v3,v1);
ADD_TRIANGLE(v5,v0,v3);
}
// ------------------------------------------------------------------------------------------------
void StandardShapes::MakeTetrahedron(aiVector3D& center,const aiVector3D& length,
std::vector<aiVector3D>& positions)
{
positions.reserve(positions.size()+9);
const float a = 1.41421f/3.f;
const float b = 2.4494f/3.f;
aiVector3D v0 = aiVector3D(0.f,0.f,1.f).SymMul(length);
aiVector3D v1 = aiVector3D(2*a,0,-1.f/3.f).SymMul(length);
aiVector3D v2 = aiVector3D(-a,b,-1.f/3.f).SymMul(length);
aiVector3D v3 = aiVector3D(-a,-b,-1.f/3.f).SymMul(length);
ADD_TRIANGLE(v0,v1,v2);
ADD_TRIANGLE(v0,v2,v3);
ADD_TRIANGLE(v0,v3,v1);
ADD_TRIANGLE(v1,v3,v2);
}
// ------------------------------------------------------------------------------------------------
void StandardShapes::MakeHexahedron(aiVector3D& center,const aiVector3D& length,
std::vector<aiVector3D>& positions)
{
positions.reserve(positions.size()+36);
aiVector3D _length = length * (1.f/1.73205080f);
aiVector3D v0 = aiVector3D(-1.f,-1.f,-1.f).SymMul(_length) ;
aiVector3D v1 = aiVector3D(1.f,-1.f,-1.f).SymMul(_length) ;
aiVector3D v2 = aiVector3D(1.f,1.f,-1.f) .SymMul(_length) ;
aiVector3D v3 = aiVector3D(-1.f,1.f,-1.f) .SymMul(_length) ;
aiVector3D v4 = aiVector3D(-1.f,-1.f,1.f) .SymMul(_length) ;
aiVector3D v5 = aiVector3D(1.f,-1.f,1.f) .SymMul(_length) ;
aiVector3D v6 = aiVector3D(1.f,1.f,1.f) .SymMul(_length) ;
aiVector3D v7 = aiVector3D(-1.f,1.f,1.f) .SymMul(_length) ;
ADD_QUAD(v0,v3,v2,v1);
ADD_QUAD(v0,v1,v5,v4);
ADD_QUAD(v0,v4,v7,v3);
ADD_QUAD(v6,v5,v1,v2);
ADD_QUAD(v6,v2,v3,v7);
ADD_QUAD(v6,v7,v4,v5);
}
#undef ADD_TRIANGLE
// ------------------------------------------------------------------------------------------------
void StandardShapes::MakeSphere(
aiVector3D& center,
float radius,
unsigned int tess,
std::vector<aiVector3D>& positions)
{
MakeIcosahedron(center,radius,positions);
for (unsigned int i = 0; i<tess;++i)
Subdivide(positions);
}
// ------------------------------------------------------------------------------------------------
void StandardShapes::MakeCone(
aiVector3D& center1,
float radius1,
aiVector3D& center2,
float radius2,
unsigned int tess,
std::vector<aiVector3D>& positions,
bool bOpened /*= false*/)
{
}
// ------------------------------------------------------------------------------------------------
void StandardShapes::MakeCircle(
aiVector3D& center,
aiVector3D& normal,
float radius,
unsigned int tess,
std::vector<aiVector3D>& positions)
{
}
} // ! Assimp