245 lines
8.7 KiB
C++
245 lines
8.7 KiB
C++
/****************************************************************************
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* VCGLib o o *
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* Visual and Computer Graphics Library o o *
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* _ O _ *
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* Copyright(C) 2004 \/)\/ *
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* Visual Computing Lab /\/| *
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* ISTI - Italian National Research Council | *
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* \ *
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* All rights reserved. *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License (http://www.gnu.org/licenses/gpl.txt) *
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* for more details. *
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* *
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****************************************************************************/
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/****************************************************************************
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History
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$Log: not supported by cvs2svn $
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Revision 1.4 2007/03/17 13:22:55 ganovelli
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some more comment added
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Revision 1.3 2006/11/21 17:44:06 cignoni
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Update to the latest version of the trackball
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Revision 1.2 2005/11/22 17:50:15 cignoni
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Refactored the sample code.
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Shortened a lot and removed all unused unnecessary stuff
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Revision 1.1 2005/09/21 10:29:33 cignoni
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Initial Relase
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****************************************************************************/
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#include <SDL.h>
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#include <gl/glew.h>
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#include <vector>
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/*include the base definition for the vertex */
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#include <vcg/simplex/vertexplus/base.h>
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/*include the base definition for the face */
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#include <vcg/simplex/faceplus/base.h>
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/*include the base definition for the trimesh*/
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#include <vcg/complex/trimesh/base.h>
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/*include the algorihm that update bounding box and normals*/
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#include <vcg/complex/trimesh/update/bounding.h>
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#include <vcg/complex/trimesh/update/normal.h>
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/*include the importer from disk*/
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#include <wrap/io_trimesh/import.h>
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/*include wrapping of the trimesh towards opengl*/
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#include <wrap/gl/trimesh.h>
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/*include the trackball: NOTE, you the implementation of the trackball is found in the files:
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wrap/gui/trackball.cpp and wrap/gui/trackmode.cpp. You should include these files in your solution
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otherwise you'll get linking errors */
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#include <wrap/gui/trackball.h>
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using namespace vcg;
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using namespace std;
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class CEdge; // dummy prototype never used
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class CFace;
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/* define a vertex passing the attributes you want it to have. Each attributes has its own class.
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Check vcg/simplex/vertexplus/component.h to find out the existing attributes. Note: then you could
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also personalized attributes */
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class CVertex : public VertexSimp2< CVertex, CEdge, CFace, vert::Coord3f, vert::Normal3f >{};
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/*same as for the vertes */
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class CFace : public FaceSimp2< CVertex, CEdge, CFace, face::VertexRef, face::Normal3f > {};
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/*the mesh is a container of vertices and a container of faces */
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class CMesh : public vcg::tri::TriMesh< vector<CVertex>, vector<CFace> > {};
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////////////////////////////////////////////////////////////////////////////
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// Globals: the mesh, the OpenGL wrapper to draw the mesh and the trackball.
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CMesh mesh;
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vcg::GlTrimesh<CMesh> glWrap;
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vcg::Trackball track;
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int drawMode;
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int width =1024;
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int height = 768;
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////////////////////////////////////////////////////////////////////////////
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void initGL()
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{
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glClearColor(0, 0, 0, 0);
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glEnable(GL_LIGHTING);
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glEnable(GL_LIGHT0);
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glEnable(GL_NORMALIZE);
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glEnable(GL_COLOR_MATERIAL);
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glEnable(GL_CULL_FACE);
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glEnable(GL_DEPTH_TEST);
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}
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void myReshapeFunc(GLsizei w, GLsizei h)
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{
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SDL_SetVideoMode(w, h, 0, SDL_OPENGL|SDL_RESIZABLE|SDL_DOUBLEBUF);
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width=w;
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height=h;
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glViewport (0, 0, (GLsizei) w, (GLsizei) h);
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initGL();
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}
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bool initSDL(const std::string &str) {
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/* Initialize SDL for video output */
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if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) {
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fprintf(stderr, "Unable to initialize SDL: %s\n", SDL_GetError());
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exit(1);
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}
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if ( SDL_SetVideoMode(width, height, 0, SDL_OPENGL|SDL_RESIZABLE) == NULL ) {
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fprintf(stderr, "Unable to create OpenGL screen: %s\n", SDL_GetError());
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SDL_Quit();
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exit(2);
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}
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SDL_WM_SetCaption(str.c_str(), str.c_str());
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myReshapeFunc(width, height);
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return true;
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}
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void display(){
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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gluPerspective(40, width/(float)height, 0.1, 100);
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glMatrixMode(GL_MODELVIEW);
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glLoadIdentity();
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gluLookAt(0,0,5, 0,0,0, 0,1,0);
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track.center=Point3f(0, 0, 0);
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track.radius= 1;
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track.GetView();
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track.Apply(false);
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glPushMatrix();
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float d=1.0f/mesh.bbox.Diag();
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glScale(d);
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glTranslate(-glWrap.m->bbox.Center());
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// the trimesh drawing calls
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switch(drawMode)
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{
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case 0: glWrap.Draw<vcg::GLW::DMSmooth, vcg::GLW::CMNone,vcg::GLW::TMNone> ();break;
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case 1: glWrap.Draw<vcg::GLW::DMPoints, vcg::GLW::CMNone,vcg::GLW::TMNone> ();break;
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case 2: glWrap.Draw<vcg::GLW::DMWire, vcg::GLW::CMNone,vcg::GLW::TMNone> ();break;
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case 3: glWrap.Draw<vcg::GLW::DMFlatWire, vcg::GLW::CMNone,vcg::GLW::TMNone> ();break;
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case 4: glWrap.Draw<vcg::GLW::DMHidden, vcg::GLW::CMNone,vcg::GLW::TMNone> ();break;
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case 5: glWrap.Draw<vcg::GLW::DMFlat, vcg::GLW::CMNone,vcg::GLW::TMNone> ();break;
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default: break;
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}
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glPopMatrix();
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track.DrawPostApply();
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SDL_GL_SwapBuffers();
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}
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// The Event Loop Processor
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int sdl_idle() {
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bool quit=false;
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SDL_Event event;
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while( !quit ) {
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SDL_WaitEvent(&event);
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switch( event.type ) {
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case SDL_QUIT: quit = true; break;
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case SDL_VIDEORESIZE : myReshapeFunc(event.resize.w,event.resize.h); break;
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case SDL_KEYDOWN:
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switch(event.key.keysym.sym) {
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case SDLK_RCTRL:
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case SDLK_LCTRL: track.ButtonDown(vcg::Trackball::KEY_CTRL); break;
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case SDLK_q: exit(0); break;
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case SDLK_SPACE: drawMode=((drawMode+1)%6); printf("Current Mode %i\n",drawMode); break;
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} break;
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case SDL_KEYUP:
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switch(event.key.keysym.sym) {
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case SDLK_RCTRL:
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case SDLK_LCTRL: track.ButtonUp(vcg::Trackball::KEY_CTRL); break;
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} break;
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case SDL_MOUSEBUTTONDOWN:
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switch(event.button.button) {
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case SDL_BUTTON_WHEELUP: track.MouseWheel( 1); break;
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case SDL_BUTTON_WHEELDOWN: track.MouseWheel(-1); break;
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case SDL_BUTTON_LEFT: track.MouseDown(event.button.x, (height - event.button.y), vcg::Trackball::BUTTON_LEFT); break;
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case SDL_BUTTON_RIGHT: track.MouseDown(event.button.x, (height - event.button.y), vcg::Trackball::BUTTON_RIGHT);break;
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} break;
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case SDL_MOUSEBUTTONUP:
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switch(event.button.button) {
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case SDL_BUTTON_LEFT: track.MouseUp(event.button.x, (height - event.button.y), vcg::Trackball::BUTTON_LEFT); break;
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case SDL_BUTTON_RIGHT: track.MouseUp(event.button.x, (height - event.button.y), vcg::Trackball::BUTTON_RIGHT);break;
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} break;
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case SDL_MOUSEMOTION:
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while(SDL_PeepEvents(&event, 1, SDL_GETEVENT, SDL_MOUSEMOTIONMASK));
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track.MouseMove(event.button.x, (height - event.button.y));
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break;
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case SDL_VIDEOEXPOSE:
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default: break;
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}
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display();
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}
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SDL_Quit();
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return -1;
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}
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int main(int argc, char *argv[]) {
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// Generic loading of the mesh from disk
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if(vcg::tri::io::Importer<CMesh>::Open(mesh,argv[1])!=0) {
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fprintf(stderr,"Error reading file %s\n",argv[1]);
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exit(0);
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}
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// Initialize the mesh itself
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vcg::tri::UpdateBounding<CMesh>::Box(mesh); // update bounding box
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//vcg::tri::UpdateNormals<CMesh>::PerVertexNormalizePerFaceNormalized(mesh); // update Normals
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vcg::tri::UpdateNormals<CMesh>::PerVertexPerFace(mesh); // update Normals
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// Initialize the wrapper
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glWrap.m = &mesh;
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glWrap.Update();
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initSDL("SDL_minimal_viewer");
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initGL();
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sdl_idle();
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exit(0);
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}
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