#include #include #include #include #include // The classic OpenGL teapot... taken form glut-3.7/lib/glut/glut_teapot.c /* Copyright (c) Mark J. Kilgard, 1994. */ /** (c) Copyright 1993, Silicon Graphics, Inc. ALL RIGHTS RESERVED Permission to use, copy, modify, and distribute this software for any purpose and without fee is hereby granted, provided that the above copyright notice appear in all copies and that both the copyright notice and this permission notice appear in supporting documentation, and that the name of Silicon Graphics, Inc. not be used in advertising or publicity pertaining to distribution of the software without specific, written prior permission. THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON GRAPHICS, INC. BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT, SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION, LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC. HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE. US Government Users Restricted Rights Use, duplication, or disclosure by the Government is subject to restrictions set forth in FAR 52.227.19(c)(2) or subparagraph (c)(1)(ii) of the Rights in Technical Data and Computer Software clause at DFARS 252.227-7013 and/or in similar or successor clauses in the FAR or the DOD or NASA FAR Supplement. Unpublished-- rights reserved under the copyright laws of the United States. Contractor/manufacturer is Silicon Graphics, Inc., 2011 N. Shoreline Blvd., Mountain View, CA 94039-7311. OpenGL(TM) is a trademark of Silicon Graphics, Inc. */ /* Rim, body, lid, and bottom data must be reflected in x and y; handle and spout data across the y axis only. */ static int patchdata[][16] = { /* rim */ {102, 103, 104, 105, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15}, /* body */ {12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27}, {24, 25, 26, 27, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40}, /* lid */ {96, 96, 96, 96, 97, 98, 99, 100, 101, 101, 101, 101, 0, 1, 2, 3,}, {0, 1, 2, 3, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117}, /* bottom */ {118, 118, 118, 118, 124, 122, 119, 121, 123, 126, 125, 120, 40, 39, 38, 37}, /* handle */ {41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56}, {53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 28, 65, 66, 67}, /* spout */ {68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83}, {80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95} }; /* *INDENT-OFF* */ static float cpdata[][3] = { {0.2, 0, 2.7}, {0.2, -0.112, 2.7}, {0.112, -0.2, 2.7}, {0, -0.2, 2.7}, {1.3375, 0, 2.53125}, {1.3375, -0.749, 2.53125}, {0.749, -1.3375, 2.53125}, {0, -1.3375, 2.53125}, {1.4375, 0, 2.53125}, {1.4375, -0.805, 2.53125}, {0.805, -1.4375, 2.53125}, {0, -1.4375, 2.53125}, {1.5, 0, 2.4}, {1.5, -0.84, 2.4}, {0.84, -1.5, 2.4}, {0, -1.5, 2.4}, {1.75, 0, 1.875}, {1.75, -0.98, 1.875}, {0.98, -1.75, 1.875}, {0, -1.75, 1.875}, {2, 0, 1.35}, {2, -1.12, 1.35}, {1.12, -2, 1.35}, {0, -2, 1.35}, {2, 0, 0.9}, {2, -1.12, 0.9}, {1.12, -2, 0.9}, {0, -2, 0.9}, {-2, 0, 0.9}, {2, 0, 0.45}, {2, -1.12, 0.45}, {1.12, -2, 0.45}, {0, -2, 0.45}, {1.5, 0, 0.225}, {1.5, -0.84, 0.225}, {0.84, -1.5, 0.225}, {0, -1.5, 0.225}, {1.5, 0, 0.15}, {1.5, -0.84, 0.15}, {0.84, -1.5, 0.15}, {0, -1.5, 0.15}, {-1.6, 0, 2.025}, {-1.6, -0.3, 2.025}, {-1.5, -0.3, 2.25}, {-1.5, 0, 2.25}, {-2.3, 0, 2.025}, {-2.3, -0.3, 2.025}, {-2.5, -0.3, 2.25}, {-2.5, 0, 2.25}, {-2.7, 0, 2.025}, {-2.7, -0.3, 2.025}, {-3, -0.3, 2.25}, {-3, 0, 2.25}, {-2.7, 0, 1.8}, {-2.7, -0.3, 1.8}, {-3, -0.3, 1.8}, {-3, 0, 1.8}, {-2.7, 0, 1.575}, {-2.7, -0.3, 1.575}, {-3, -0.3, 1.35}, {-3, 0, 1.35}, {-2.5, 0, 1.125}, {-2.5, -0.3, 1.125}, {-2.65, -0.3, 0.9375}, {-2.65, 0, 0.9375}, {-2, -0.3, 0.9}, {-1.9, -0.3, 0.6}, {-1.9, 0, 0.6}, {1.7, 0, 1.425}, {1.7, -0.66, 1.425}, {1.7, -0.66, 0.6}, {1.7, 0, 0.6}, {2.6, 0, 1.425}, {2.6, -0.66, 1.425}, {3.1, -0.66, 0.825}, {3.1, 0, 0.825}, {2.3, 0, 2.1}, {2.3, -0.25, 2.1}, {2.4, -0.25, 2.025}, {2.4, 0, 2.025}, {2.7, 0, 2.4}, {2.7, -0.25, 2.4}, {3.3, -0.25, 2.4}, {3.3, 0, 2.4}, {2.8, 0, 2.475}, {2.8, -0.25, 2.475}, {3.525, -0.25, 2.49375}, {3.525, 0, 2.49375}, {2.9, 0, 2.475}, {2.9, -0.15, 2.475}, {3.45, -0.15, 2.5125}, {3.45, 0, 2.5125}, {2.8, 0, 2.4}, {2.8, -0.15, 2.4}, {3.2, -0.15, 2.4}, {3.2, 0, 2.4}, {0, 0, 3.15}, {0.8, 0, 3.15}, {0.8, -0.45, 3.15}, {0.45, -0.8, 3.15}, {0, -0.8, 3.15}, {0, 0, 2.85}, {1.4, 0, 2.4}, {1.4, -0.784, 2.4}, {0.784, -1.4, 2.4}, {0, -1.4, 2.4}, {0.4, 0, 2.55}, {0.4, -0.224, 2.55}, {0.224, -0.4, 2.55}, {0, -0.4, 2.55}, {1.3, 0, 2.55}, {1.3, -0.728, 2.55}, {0.728, -1.3, 2.55}, {0, -1.3, 2.55}, {1.3, 0, 2.4}, {1.3, -0.728, 2.4}, {0.728, -1.3, 2.4}, {0, -1.3, 2.4}, {0, 0, 0}, {1.425, -0.798, 0}, {1.5, 0, 0.075}, {1.425, 0, 0}, {0.798, -1.425, 0}, {0, -1.5, 0.075}, {0, -1.425, 0}, {1.5, -0.84, 0.075}, {0.84, -1.5, 0.075} }; static float tex[2][2][2] = { { {0, 0}, {1, 0}}, { {0, 1}, {1, 1}} }; /* *INDENT-ON* */ static void teapot(GLint grid, GLenum type) { float p[4][4][3], q[4][4][3], r[4][4][3], s[4][4][3]; long i, j, k, l; glPushAttrib(GL_ENABLE_BIT | GL_EVAL_BIT); glEnable(GL_AUTO_NORMAL); glEnable(GL_NORMALIZE); glEnable(GL_MAP2_VERTEX_3); glEnable(GL_MAP2_TEXTURE_COORD_2); for (i = 0; i < 10; i++) { for (j = 0; j < 4; j++) { for (k = 0; k < 4; k++) { for (l = 0; l < 3; l++) { p[j][k][l] = cpdata[patchdata[i][j * 4 + k]][l]; q[j][k][l] = cpdata[patchdata[i][j * 4 + (3 - k)]][l]; if (l == 1) q[j][k][l] *= -1.0; if (i < 6) { r[j][k][l] = cpdata[patchdata[i][j * 4 + (3 - k)]][l]; if (l == 0) r[j][k][l] *= -1.0; s[j][k][l] = cpdata[patchdata[i][j * 4 + k]][l]; if (l == 0) s[j][k][l] *= -1.0; if (l == 1) s[j][k][l] *= -1.0; } } } } glMap2f(GL_MAP2_TEXTURE_COORD_2, 0, 1, 2, 2, 0, 1, 4, 2, &tex[0][0][0]); glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4, &p[0][0][0]); glMapGrid2f(grid, 0.0, 1.0, grid, 0.0, 1.0); glEvalMesh2(type, 0, grid, 0, grid); glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4, &q[0][0][0]); glEvalMesh2(type, 0, grid, 0, grid); if (i < 6) { glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4, &r[0][0][0]); glEvalMesh2(type, 0, grid, 0, grid); glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4, &s[0][0][0]); glEvalMesh2(type, 0, grid, 0, grid); } } glPopAttrib(); } // Now the OSG wrapper for the above OpenGL code, the most complicated bit is computing // the bounding box for the above example, normally you'll find this the easy bit. class Teapot : public osg::Drawable { public: Teapot() {} /** Copy constructor using CopyOp to manage deep vs shallow copy.*/ Teapot(const Teapot& teapot,const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY): osg::Drawable(teapot,copyop) {} META_Object(myTeapotApp,Teapot) // the draw immediate mode method is where the OSG wraps up the drawing of // of OpenGL primitives. virtual void drawImplementation(osg::State&) const { // teapot(..) doens't use vertex arrays at all so we don't need to toggle their state // if we did we'd need to something like following call // state.disableAllVertexArrays(), see src/osg/Geometry.cpp for the low down. // just call the OpenGL code. teapot(14,GL_FILL); } // we need to set up the bounding box of the data too, so that the scene graph knows where this // objects is, for both positioning the camera at start up, and most importantly for culling. virtual osg::BoundingBox computeBound() const { osg::BoundingBox bbox; // follow is some truely horrible code required to calculate the // bounding box of the teapot. Have used the original code above to do // help compute it. float p[4][4][3], q[4][4][3], r[4][4][3], s[4][4][3]; long i, j, k, l; for (i = 0; i < 10; i++) { for (j = 0; j < 4; j++) { for (k = 0; k < 4; k++) { for (l = 0; l < 3; l++) { p[j][k][l] = cpdata[patchdata[i][j * 4 + k]][l]; q[j][k][l] = cpdata[patchdata[i][j * 4 + (3 - k)]][l]; if (l == 1) q[j][k][l] *= -1.0; if (i < 6) { r[j][k][l] = cpdata[patchdata[i][j * 4 + (3 - k)]][l]; if (l == 0) r[j][k][l] *= -1.0; s[j][k][l] = cpdata[patchdata[i][j * 4 + k]][l]; if (l == 0) s[j][k][l] *= -1.0; if (l == 1) s[j][k][l] *= -1.0; } } bbox.expandBy(osg::Vec3(p[j][k][0],p[j][k][1],p[j][k][2])); bbox.expandBy(osg::Vec3(q[j][k][0],q[j][k][1],q[j][k][2])); if (i < 6) { bbox.expandBy(osg::Vec3(r[j][k][0],r[j][k][1],r[j][k][2])); bbox.expandBy(osg::Vec3(s[j][k][0],s[j][k][1],s[j][k][2])); } } } } return bbox; } protected: virtual ~Teapot() {} }; osg::Geode* createTeapot() { osg::Geode* geode = new osg::Geode(); // add the teapot to the geode. geode->addDrawable( new Teapot ); // add a reflection map to the teapot. osg::Image* image = osgDB::readImageFile("Images/reflect.rgb"); if (image) { osg::Texture2D* texture = new osg::Texture2D; texture->setImage(image); osg::TexGen* texgen = new osg::TexGen; texgen->setMode(osg::TexGen::SPHERE_MAP); osg::StateSet* stateset = new osg::StateSet; stateset->setTextureAttributeAndModes(0,texture,osg::StateAttribute::ON); stateset->setTextureAttributeAndModes(0,texgen,osg::StateAttribute::ON); geode->setStateSet(stateset); } return geode; } int main(int , char **) { // construct the viewer. osgViewer::Viewer viewer; // add model to viewer. viewer.setSceneData( createTeapot() ); // create the windows and run the threads. return viewer.run(); }