335 lines
11 KiB
C++
335 lines
11 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) 2007 \/)\/ *
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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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* Minimal trimesh viewer made with AntTweakBar and freglut
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*
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* This sample shows how to use togheter:
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* - the trimesh loading and initialization
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* - basic usage of the default manipulators (the "Trackball")
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*/
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#include <AntTweakBar.h>
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#include <GL/glew.h>
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#include <GL/freeglut.h>
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#include <stdio.h>
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/// vcg imports
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#include <vcg/simplex/vertex/base.h>
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#include <vcg/simplex/face/base.h>
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#include <vcg/complex/complex.h>
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#include <vcg/complex/algorithms/update/bounding.h>
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#include <vcg/complex/algorithms/update/normal.h>
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#include <vcg/complex/algorithms/create/platonic.h>
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/// wrapper imports
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#include <wrap/io_trimesh/import.h>
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#include <wrap/gl/trimesh.h>
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#include <wrap/gui/trackball.h>
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/// declaring edge and face type
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using namespace vcg;
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class CFace;
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class CVertex;
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struct MyUsedTypes : public UsedTypes< Use<CVertex> ::AsVertexType,
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Use<CFace> ::AsFaceType>{};
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/// compositing wanted proprieties
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class CVertex : public vcg::Vertex< MyUsedTypes, vcg::vertex::Coord3f, vcg::vertex::Normal3f, vcg::vertex::BitFlags>{};
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class CFace : public vcg::Face< MyUsedTypes, vcg::face::VertexRef, vcg::face::Normal3f, vcg::face::BitFlags > {};
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class CMesh : public vcg::tri::TriMesh< std::vector<CVertex>, std::vector<CFace> > {};
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/// the active mesh instance
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CMesh mesh;
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/// filename of the mesh to load
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char * filename = NULL;
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/// the active mesh opengl wrapper
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vcg::GlTrimesh<CMesh> glWrap;
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/// the active manipulator
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vcg::Trackball track;
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/// window size
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int width,height;
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/// we choosed a subset of the avaible drawing modes
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enum DrawMode{SMOOTH=0,PERPOINTS,WIRE,FLATWIRE,HIDDEN,FLAT};
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/// the current drawmode
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DrawMode drawmode;
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/// Takes a GLUT MouseButton and returns the equivalent Trackball::Button
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static vcg::Trackball::Button GLUT2VCG (int glut_button, int )
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{
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int vcgbt = vcg::Trackball::BUTTON_NONE;
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switch(glut_button){
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case GLUT_LEFT_BUTTON: vcgbt |= vcg::Trackball::BUTTON_LEFT; break;
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case GLUT_MIDDLE_BUTTON: vcgbt |= vcg::Trackball::BUTTON_RIGHT; break;
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case GLUT_RIGHT_BUTTON: vcgbt |= vcg::Trackball::BUTTON_MIDDLE; break;
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}
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int modifiers = glutGetModifiers();
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if (modifiers & GLUT_ACTIVE_SHIFT) vcgbt |= vcg::Trackball::KEY_SHIFT;
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if (modifiers & GLUT_ACTIVE_CTRL) vcgbt |= vcg::Trackball::KEY_CTRL;
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if (modifiers & GLUT_ACTIVE_ALT) vcgbt |= vcg::Trackball::KEY_ALT;
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return vcg::Trackball::Button (vcgbt);
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}
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void Display(){
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glViewport(0, 0, width, height);
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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if(!mesh.face.empty()){
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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=vcg::Point3f(0, 0, 0);
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track.radius= 1;
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track.GetView();
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track.Apply();
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glPushMatrix();
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float d=1.0f/mesh.bbox.Diag();
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vcg::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 SMOOTH:
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glWrap.Draw<vcg::GLW::DMSmooth, vcg::GLW::CMNone,vcg::GLW::TMNone> ();
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break;
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case PERPOINTS:
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glWrap.Draw<vcg::GLW::DMPoints, vcg::GLW::CMNone,vcg::GLW::TMNone> ();
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break;
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case WIRE:
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glWrap.Draw<vcg::GLW::DMWire, vcg::GLW::CMNone,vcg::GLW::TMNone> ();
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break;
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case FLATWIRE:
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glWrap.Draw<vcg::GLW::DMFlatWire, vcg::GLW::CMNone,vcg::GLW::TMNone> ();
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break;
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case HIDDEN:
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glWrap.Draw<vcg::GLW::DMHidden, vcg::GLW::CMNone,vcg::GLW::TMNone> ();
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break;
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case FLAT:
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glWrap.Draw<vcg::GLW::DMFlat, vcg::GLW::CMNone,vcg::GLW::TMNone> ();
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break;
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default:
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break;
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}
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glPopMatrix();
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track.DrawPostApply();
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}
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TwDraw();
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// Present frame buffer
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glutSwapBuffers();
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// Recall Display at next frame
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glutPostRedisplay();
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}
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void Reshape(int _width,int _height){
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width = _width ;
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height = _height;
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TwWindowSize(width, height);
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}
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void Terminate(){}
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void initMesh()
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{
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// update bounding box
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vcg::tri::UpdateBounding<CMesh>::Box(mesh);
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// update Normals
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vcg::tri::UpdateNormals<CMesh>::PerVertexNormalizedPerFace(mesh);
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vcg::tri::UpdateNormals<CMesh>::PerFaceNormalized(mesh);
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// Initialize the opengl wrapper
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glWrap.m = &mesh;
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glWrap.Update();
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}
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void TW_CALL loadMesh(void *)
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{
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if(filename==0) return;
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int err=vcg::tri::io::ImporterPLY<CMesh>::Open(mesh,(char*)filename);
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if(err!=0){
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const char* errmsg=vcg::tri::io::ImporterPLY<CMesh>::ErrorMsg(err);
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}
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else
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initMesh();
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}
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void TW_CALL loadTetrahedron(void *){
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vcg::tri::Tetrahedron(mesh);
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initMesh();
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}
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void TW_CALL loadDodecahedron(void * ){
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vcg::tri::Dodecahedron(mesh);
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initMesh();
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}
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void keyReleaseEvent (unsigned char k,int x,int y)
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{
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int modifiers = glutGetModifiers();
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if (modifiers & GLUT_ACTIVE_CTRL)
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track.ButtonUp (Trackball::Button::KEY_CTRL);
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if (modifiers & GLUT_ACTIVE_SHIFT)
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track.ButtonUp ( Trackball::Button::KEY_SHIFT);
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if (modifiers & GLUT_ACTIVE_ALT)
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track.ButtonUp (Trackball::Button::KEY_ALT);
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}
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void keyPressEvent (unsigned char k,int x,int y)
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{
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int modifiers = glutGetModifiers();
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if (modifiers & GLUT_ACTIVE_CTRL)
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track.ButtonDown (Trackball::Button::KEY_CTRL);
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if (modifiers & GLUT_ACTIVE_SHIFT)
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track.ButtonDown ( Trackball::Button::KEY_SHIFT);
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if (modifiers & GLUT_ACTIVE_ALT)
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track.ButtonDown (Trackball::Button::KEY_ALT);
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TwEventKeyboardGLUT(k,x,y);
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}
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void mousePressEvent(int bt,int state,int x,int y){
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if(state == GLUT_DOWN)
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track.MouseDown ( x , height - y , GLUT2VCG (bt,state));
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else
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track.MouseUp ( x , height - y , GLUT2VCG (bt,state));
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TwEventMouseButtonGLUT(bt,state,x,y);
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};
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void mouseMoveEvent (int x, int y )
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{
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if(!TwEventMouseMotionGLUT(x,y))
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track.MouseMove ( x , height - y );
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}
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//void mouseReleaseEvent(QMouseEvent*e);
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void wheelEvent(int wheel, int direction, int x, int y ){
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track.MouseWheel(wheel*direction);
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}
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void TW_CALL CopyCDStringToClient(char **destPtr, const char *src)
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{
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size_t srcLen = (src!=NULL) ? strlen(src) : 0;
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size_t destLen = (*destPtr!=NULL) ? strlen(*destPtr) : 0;
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// Alloc or realloc dest memory block if needed
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if( *destPtr==NULL )
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*destPtr = (char *)malloc(srcLen+1);
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else if( srcLen>destLen )
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*destPtr = (char *)realloc(*destPtr, srcLen+1);
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// Copy src
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if( srcLen>0 )
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strncpy(*destPtr, src, srcLen);
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(*destPtr)[srcLen] = '\0'; // null-terminated string
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}
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int main(int argc, char *argv[])
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{
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TwBar *bar; // Pointer to the tweak bar
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// Initialize AntTweakBar
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// (note that AntTweakBar could also be intialized after GLUT, no matter)
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if( !TwInit(TW_OPENGL, NULL) )
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{
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// A fatal error occured
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fprintf(stderr, "AntTweakBar initialization failed: %s\n", TwGetLastError());
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return 1;
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}
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glutInit(&argc, argv);
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glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
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glutInitWindowSize(640, 480);
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glutCreateWindow("AntTweakBar simple example using GLUT");
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glutCreateMenu(NULL);
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glEnable(GL_DEPTH_TEST);
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glEnable(GL_LIGHT0);
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glEnable(GL_LIGHTING);
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// Set GLUT callbacks
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glutDisplayFunc(Display);
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glutReshapeFunc(Reshape);
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atexit(Terminate); // Called after glutMainLoop ends
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// Set GLUT event callbacks
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// - Directly redirect GLUT mouse button events to AntTweakBar
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glutMouseFunc((GLUTmousebuttonfun)mousePressEvent);
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// - Directly redirect GLUT mouse motion events to AntTweakBar
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glutMotionFunc((GLUTmousemotionfun)mouseMoveEvent);
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// - Directly redirect GLUT mouse "passive" motion events to AntTweakBar (same as MouseMotion)
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glutPassiveMotionFunc((GLUTmousemotionfun)TwEventMouseMotionGLUT);
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// - Directly redirect GLUT key events to AntTweakBar
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glutKeyboardFunc((GLUTkeyboardfun)TwEventKeyboardGLUT);
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// - Directly redirect GLUT special key events to AntTweakBar
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glutSpecialFunc((GLUTspecialfun)TwEventSpecialGLUT);
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glutKeyboardFunc(keyPressEvent);
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glutKeyboardUpFunc(keyReleaseEvent);
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glutMouseWheelFunc(wheelEvent);
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bar = TwNewBar("TweakBar");
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TwCopyCDStringToClientFunc (CopyCDStringToClient);
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TwAddVarRW(bar,"Input",TW_TYPE_CDSTRING,&filename," label='Filepath' group=SetMesh help=` Name of the file to load` ");
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TwAddButton(bar,"Load from file",loadMesh,0, " label='Load Mesh' group=SetMesh help=`load the mesh` ");
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TwAddButton(bar,"Use tetrahedron",loadTetrahedron,0, " label='Make Tetrahedron' group=SetMesh help=`use tetrahedron.` ");
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TwAddButton(bar,"Use dodecahedron",loadDodecahedron,0, " label='Make Dodecahedron' group=SetMesh help=`use dodecahedron.` ");
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// ShapeEV associates Shape enum values with labels that will be displayed instead of enum values
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TwEnumVal drawmodes[6] = { {SMOOTH, "Smooth"}, {PERPOINTS, "Per Points"}, {WIRE, "Wire"}, {FLATWIRE, "FlatWire"},{HIDDEN, "Hidden"},{FLAT, "Flat"}};
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// Create a type for the enum shapeEV
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TwType drawMode = TwDefineEnum("DrawMode", drawmodes, 6);
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// add 'g_CurrentShape' to 'bar': this is a variable of type ShapeType. Its key shortcuts are [<] and [>].
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TwAddVarRW(bar, "Draw Mode", drawMode, &drawmode, " keyIncr='<' keyDecr='>' help='Change draw mode.' ");
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glutMainLoop();
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}
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