summaryrefslogtreecommitdiffhomepage
path: root/eigen/demos/opengl/icosphere.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'eigen/demos/opengl/icosphere.cpp')
-rw-r--r--eigen/demos/opengl/icosphere.cpp120
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]);
-}
-
-