/****************************************************************************
* VCGLib o o *
* Visual and Computer Graphics Library o o *
* _ O _ *
* Copyright(C) 2004 \/)\/ *
* Visual Computing Lab /\/| *
* ISTI - Italian National Research Council | *
* \ *
* All rights reserved. *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License (http://www.gnu.org/licenses/gpl.txt) *
* for more details. *
* *
****************************************************************************/
/****************************************************************************
History
$Log: not supported by cvs2svn $
Revision 1.4 2007/03/17 13:22:55 ganovelli
some more comment added
Revision 1.3 2006/11/21 17:44:06 cignoni
Update to the latest version of the trackball
Revision 1.2 2005/11/22 17:50:15 cignoni
Refactored the sample code.
Shortened a lot and removed all unused unnecessary stuff
Revision 1.1 2005/09/21 10:29:33 cignoni
Initial Relase
****************************************************************************/
#include <SDL.h>
#include <GL/glew.h>
#include <vector>
/*include the base definition for the vertex */
#include <vcg/simplex/vertex/base.h>
/*include the base definition for the face */
#include <vcg/simplex/face/base.h>
/*include the base definition for the trimesh*/
#include <vcg/complex/complex.h>
/*include the algorihm that update bounding box and normals*/
#include <vcg/complex/algorithms/update/bounding.h>
#include <vcg/complex/algorithms/update/normal.h>
/*include the importer from disk*/
#include <wrap/io_trimesh/import.h>
/*include wrapping of the trimesh towards opengl*/
#include <wrap/gl/trimesh.h>
/*include the trackball: NOTE, you the implementation of the trackball is found in the files:
wrap/gui/trackball.cpp and wrap/gui/trackmode.cpp. You should include these files in your solution
otherwise you'll get linking errors */
#include <wrap/gui/trackball.h>
using namespace vcg;
using namespace std;
class CFace;
class CVertex;
struct MyUsedTypes : public UsedTypes< Use<CVertex> ::AsVertexType,
Use<CFace> ::AsFaceType>{};
/* define a vertex passing the attributes you want it to have. Each attributes has its own class.
Check vcg/simplex/vertex/component.h to find out the existing attributes. Note: then you could
also personalized attributes */
class CVertex : public Vertex< MyUsedTypes, vertex::Coord3f, vertex::Normal3f >{};
/*same as for the vertes */
class CFace : public Face< MyUsedTypes, face::VertexRef, face::Normal3f > {};
/*the mesh is a container of vertices and a container of faces */
class CMesh : public vcg::tri::TriMesh< vector<CVertex>, vector<CFace> > {};
////////////////////////////////////////////////////////////////////////////
// Globals: the mesh, the OpenGL wrapper to draw the mesh and the trackball.
CMesh mesh;
vcg::GlTrimesh<CMesh> glWrap;
vcg::Trackball track;
int drawMode;
int width =1024;
int height = 768;
////////////////////////////////////////////////////////////////////////////
void initGL()
{
glClearColor(0, 0, 0, 0);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glEnable(GL_NORMALIZE);
glEnable(GL_COLOR_MATERIAL);
glEnable(GL_CULL_FACE);
glEnable(GL_DEPTH_TEST);
}
void myReshapeFunc(GLsizei w, GLsizei h)
{
SDL_SetVideoMode(w, h, 0, SDL_OPENGL|SDL_RESIZABLE|SDL_DOUBLEBUF);
width=w;
height=h;
glViewport (0, 0, (GLsizei) w, (GLsizei) h);
initGL();
}
bool initSDL(const std::string &str) {
/* Initialize SDL for video output */
if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) {
fprintf(stderr, "Unable to initialize SDL: %s\n", SDL_GetError());
exit(1);
}
if ( SDL_SetVideoMode(width, height, 0, SDL_OPENGL|SDL_RESIZABLE) == NULL ) {
fprintf(stderr, "Unable to create OpenGL screen: %s\n", SDL_GetError());
SDL_Quit();
exit(2);
}
SDL_WM_SetCaption(str.c_str(), str.c_str());
myReshapeFunc(width, height);
return true;
}
void display(){
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(40, width/(float)height, 0.1, 100);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
gluLookAt(0,0,5, 0,0,0, 0,1,0);
track.center=Point3f(0, 0, 0);
track.radius= 1;
track.GetView();
track.Apply(false);
glPushMatrix();
float d=1.0f/mesh.bbox.Diag();
glScale(d);
glTranslate(-glWrap.m->bbox.Center());
// the trimesh drawing calls
switch(drawMode)
{
case 0: glWrap.Draw<vcg::GLW::DMSmooth, vcg::GLW::CMNone,vcg::GLW::TMNone> ();break;
case 1: glWrap.Draw<vcg::GLW::DMPoints, vcg::GLW::CMNone,vcg::GLW::TMNone> ();break;
case 2: glWrap.Draw<vcg::GLW::DMWire, vcg::GLW::CMNone,vcg::GLW::TMNone> ();break;
case 3: glWrap.Draw<vcg::GLW::DMFlatWire, vcg::GLW::CMNone,vcg::GLW::TMNone> ();break;
case 4: glWrap.Draw<vcg::GLW::DMHidden, vcg::GLW::CMNone,vcg::GLW::TMNone> ();break;
case 5: glWrap.Draw<vcg::GLW::DMFlat, vcg::GLW::CMNone,vcg::GLW::TMNone> ();break;
default: break;
}
glPopMatrix();
track.DrawPostApply();
SDL_GL_SwapBuffers();
}
// The Event Loop Processor
int sdl_idle() {
bool quit=false;
SDL_Event event;
while( !quit ) {
SDL_WaitEvent(&event);
switch( event.type ) {
case SDL_QUIT: quit = true; break;
case SDL_VIDEORESIZE : myReshapeFunc(event.resize.w,event.resize.h); break;
case SDL_KEYDOWN:
switch(event.key.keysym.sym) {
case SDLK_RCTRL:
case SDLK_LCTRL: track.ButtonDown(vcg::Trackball::KEY_CTRL); break;
case SDLK_q: exit(0); break;
case SDLK_SPACE: drawMode=((drawMode+1)%6); printf("Current Mode %i\n",drawMode); break;
} break;
case SDL_KEYUP:
switch(event.key.keysym.sym) {
case SDLK_RCTRL:
case SDLK_LCTRL: track.ButtonUp(vcg::Trackball::KEY_CTRL); break;
} break;
case SDL_MOUSEBUTTONDOWN:
switch(event.button.button) {
case SDL_BUTTON_WHEELUP: track.MouseWheel( 1); break;
case SDL_BUTTON_WHEELDOWN: track.MouseWheel(-1); break;
case SDL_BUTTON_LEFT: track.MouseDown(event.button.x, (height - event.button.y), vcg::Trackball::BUTTON_LEFT); break;
case SDL_BUTTON_RIGHT: track.MouseDown(event.button.x, (height - event.button.y), vcg::Trackball::BUTTON_RIGHT);break;
} break;
case SDL_MOUSEBUTTONUP:
switch(event.button.button) {
case SDL_BUTTON_LEFT: track.MouseUp(event.button.x, (height - event.button.y), vcg::Trackball::BUTTON_LEFT); break;
case SDL_BUTTON_RIGHT: track.MouseUp(event.button.x, (height - event.button.y), vcg::Trackball::BUTTON_RIGHT);break;
} break;
case SDL_MOUSEMOTION:
while(SDL_PeepEvents(&event, 1, SDL_GETEVENT, SDL_MOUSEMOTIONMASK));
track.MouseMove(event.button.x, (height - event.button.y));
break;
case SDL_VIDEOEXPOSE:
default: break;
}
display();
}
SDL_Quit();
return -1;
}
int main(int argc, char *argv[]) {
// Generic loading of the mesh from disk
if(vcg::tri::io::Importer<CMesh>::Open(mesh,argv[1])!=0) {
fprintf(stderr,"Error reading file %s\n",argv[1]);
exit(0);
}
// Initialize the mesh itself
vcg::tri::UpdateBounding<CMesh>::Box(mesh); // update bounding box
//vcg::tri::UpdateNormals<CMesh>::PerVertexNormalizePerFaceNormalized(mesh); // update Normals
vcg::tri::UpdateNormals<CMesh>::PerVertexPerFace(mesh); // update Normals
// Initialize the wrapper
glWrap.m = &mesh;
glWrap.Update();
initSDL("SDL_minimal_viewer");
initGL();
sdl_idle();
exit(0);
}