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Diffstat (limited to 'eigen/demos/opengl/icosphere.cpp')
-rw-r--r-- | eigen/demos/opengl/icosphere.cpp | 120 |
1 files changed, 0 insertions, 120 deletions
diff --git a/eigen/demos/opengl/icosphere.cpp b/eigen/demos/opengl/icosphere.cpp deleted file mode 100644 index 39444cb..0000000 --- a/eigen/demos/opengl/icosphere.cpp +++ /dev/null @@ -1,120 +0,0 @@ -// This file is part of Eigen, a lightweight C++ template library -// for linear algebra. -// -// Copyright (C) 2008 Gael Guennebaud <gael.guennebaud@inria.fr> -// -// This Source Code Form is subject to the terms of the Mozilla -// Public License v. 2.0. If a copy of the MPL was not distributed -// with this file, You can obtain one at http://mozilla.org/MPL/2.0/. - -#include "icosphere.h" - -#include <GL/gl.h> -#include <map> - -using namespace Eigen; - -//-------------------------------------------------------------------------------- -// icosahedron data -//-------------------------------------------------------------------------------- -#define X .525731112119133606 -#define Z .850650808352039932 - -static GLfloat vdata[12][3] = { - {-X, 0.0, Z}, {X, 0.0, Z}, {-X, 0.0, -Z}, {X, 0.0, -Z}, - {0.0, Z, X}, {0.0, Z, -X}, {0.0, -Z, X}, {0.0, -Z, -X}, - {Z, X, 0.0}, {-Z, X, 0.0}, {Z, -X, 0.0}, {-Z, -X, 0.0} -}; - -static GLint tindices[20][3] = { - {0,4,1}, {0,9,4}, {9,5,4}, {4,5,8}, {4,8,1}, - {8,10,1}, {8,3,10}, {5,3,8}, {5,2,3}, {2,7,3}, - {7,10,3}, {7,6,10}, {7,11,6}, {11,0,6}, {0,1,6}, - {6,1,10}, {9,0,11}, {9,11,2}, {9,2,5}, {7,2,11} }; -//-------------------------------------------------------------------------------- - -IcoSphere::IcoSphere(unsigned int levels) -{ - // init with an icosahedron - for (int i = 0; i < 12; i++) - mVertices.push_back(Map<Vector3f>(vdata[i])); - mIndices.push_back(new std::vector<int>); - std::vector<int>& indices = *mIndices.back(); - for (int i = 0; i < 20; i++) - { - for (int k = 0; k < 3; k++) - indices.push_back(tindices[i][k]); - } - mListIds.push_back(0); - - while(mIndices.size()<levels) - _subdivide(); -} - -const std::vector<int>& IcoSphere::indices(int level) const -{ - while (level>=int(mIndices.size())) - const_cast<IcoSphere*>(this)->_subdivide(); - return *mIndices[level]; -} - -void IcoSphere::_subdivide(void) -{ - typedef unsigned long long Key; - std::map<Key,int> edgeMap; - const std::vector<int>& indices = *mIndices.back(); - mIndices.push_back(new std::vector<int>); - std::vector<int>& refinedIndices = *mIndices.back(); - int end = indices.size(); - for (int i=0; i<end; i+=3) - { - int ids0[3], // indices of outer vertices - ids1[3]; // indices of edge vertices - for (int k=0; k<3; ++k) - { - int k1 = (k+1)%3; - int e0 = indices[i+k]; - int e1 = indices[i+k1]; - ids0[k] = e0; - if (e1>e0) - std::swap(e0,e1); - Key edgeKey = Key(e0) | (Key(e1)<<32); - std::map<Key,int>::iterator it = edgeMap.find(edgeKey); - if (it==edgeMap.end()) - { - ids1[k] = mVertices.size(); - edgeMap[edgeKey] = ids1[k]; - mVertices.push_back( (mVertices[e0]+mVertices[e1]).normalized() ); - } - else - ids1[k] = it->second; - } - refinedIndices.push_back(ids0[0]); refinedIndices.push_back(ids1[0]); refinedIndices.push_back(ids1[2]); - refinedIndices.push_back(ids0[1]); refinedIndices.push_back(ids1[1]); refinedIndices.push_back(ids1[0]); - refinedIndices.push_back(ids0[2]); refinedIndices.push_back(ids1[2]); refinedIndices.push_back(ids1[1]); - refinedIndices.push_back(ids1[0]); refinedIndices.push_back(ids1[1]); refinedIndices.push_back(ids1[2]); - } - mListIds.push_back(0); -} - -void IcoSphere::draw(int level) -{ - while (level>=int(mIndices.size())) - const_cast<IcoSphere*>(this)->_subdivide(); - if (mListIds[level]==0) - { - mListIds[level] = glGenLists(1); - glNewList(mListIds[level], GL_COMPILE); - glVertexPointer(3, GL_FLOAT, 0, mVertices[0].data()); - glNormalPointer(GL_FLOAT, 0, mVertices[0].data()); - glEnableClientState(GL_VERTEX_ARRAY); - glEnableClientState(GL_NORMAL_ARRAY); - glDrawElements(GL_TRIANGLES, mIndices[level]->size(), GL_UNSIGNED_INT, &(mIndices[level]->at(0))); - glDisableClientState(GL_VERTEX_ARRAY); - glDisableClientState(GL_NORMAL_ARRAY); - glEndList(); - } - glCallList(mListIds[level]); -} - - |