vcglib/apps/shadevis/shadevis.cpp

/****************************************************************************
* 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  2004/09/09 22:34:38  cignoni
Integrated lost modifications...

Revision 1.3  2004/09/09 14:35:54  ponchio
Various changes for gcc compatibility

Revision 1.2  2004/07/11 22:13:30  cignoni
Added GPL comments


****************************************************************************/
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <time.h>
#include <GL/glew.h>
#include <GL/glut.h>
#include <wrap/gl/space.h>


#include <wrap/callback.h>
#include <vcg/math/base.h>
#include <wrap/gui/trackball.h>
#include <vcg/simplex/vertex/with/vcvn.h>
#include <vcg/simplex/vertex/with/vcvn.h>
#include <vcg/simplex/face/with/fcfn.h>
#include <vcg/space/index/grid_static_ptr.h>
#include <vcg/complex/trimesh/base.h>
#include<wrap/io_trimesh/export_ply.h>
#include<wrap/io_trimesh/import_ply.h>
#include<vcg/complex/trimesh/update/normal.h>
#include<vcg/complex/trimesh/update/bounding.h>
#include<vcg/complex/trimesh/update/color.h>

#include "visshader.h"
using namespace vcg;
using namespace std;




// Vertex, Face, Mesh and Grid definitions.
class MyEdge;
class AFace;
class AVertex   : public VertexVCVN< float ,MyEdge,AFace > {};
class AFace     : public FaceFCFN< AVertex,MyEdge,AFace > {};
class AMesh     : public tri::TriMesh< vector<AVertex>, vector<AFace> > {};

///////// Global ////////

int SampleNum=64;
int WindowRes=800;
unsigned int TexInd=0;
bool SwapFlag=false;
bool CullFlag=false;
bool ClosedFlag=false;
Point3f ConeDir(0,1,0);
float ConeAngleRad = math::ToRad(180.0f);

float lopass=0,hipass=1,gamma=1;
float diff=.8;
float ambi=.2;

bool LightFlag=true;
bool ColorFlag=true;
bool ShowDirFlag=false;
int imgcnt=0;

Color4b BaseColor=Color4b::White;
Trackball QV;
Trackball QL;
Trackball *Q=&QV;

int ScreenH,ScreenW;
float ViewAngle=33;
vector<Point3f> ViewVector;

bool cb(const char *buf)
{
	printf(buf);
	return true;
}

void BuildOnePixelTexture(Color4b c, unsigned int &TexInd)
{
  if(TexInd==0) glGenTextures(1,&TexInd);

  glBindTexture(GL_TEXTURE_1D,TexInd);
  glTexImage1D(GL_TEXTURE_1D,0,GL_RGBA,1,0,GL_RGBA,GL_UNSIGNED_BYTE,&c);
  glEnable(GL_TEXTURE_1D);
  glTexEnvi(GL_TEXTURE_ENV,GL_TEXTURE_ENV_MODE,GL_MODULATE);
}
void glutPrintf(int x, int y, const char * f, ... )
{
  glMatrixMode (GL_PROJECTION);   
  glPushMatrix();
  glLoadIdentity (); 
  glOrtho(0,ScreenW,0,ScreenH,-1,1);
  glMatrixMode (GL_MODELVIEW);    
  glPushMatrix();
  glLoadIdentity ();  
  
  int len, i;
  char buf[4096];
  va_list marker;
  va_start( marker, f );     

  int n = vsprintf(buf,f,marker);
  va_end( marker );              

  glColor3f(0,0,0);
  glRasterPos2f(x, y);
  len = (int) strlen(buf);
  for (i = 0; i < len; i++) {
    glutBitmapCharacter(GLUT_BITMAP_HELVETICA_12, buf[i]);
  }
  glMatrixMode (GL_PROJECTION);   
  glPopMatrix();
  glMatrixMode (GL_MODELVIEW);    
  glPopMatrix();
  
}

// prototypes
void SaveTexturedGround();

void DrawViewVector()
{
  glDisable(GL_LIGHTING);  
  glColor3f(0,0,1);
  glBegin(GL_LINES);
  for(unsigned int i=0;i<ViewVector.size();++i)
  {
    glVertex3f(0,0,0);glVertex(ViewVector[i]);
  }
  glEnd();
}
void DrawLightVector()
{
  const int sz=5;
  glPushMatrix();
  QL.Apply();
  glDisable(GL_LIGHTING);  
  glBegin(GL_LINES);
  glColor3f(1,1,0);
  for(unsigned int i=0;i<=sz;++i)
    for(unsigned int j=0;j<=sz;++j)
      {
        glColor3f(1,1,0);
        glVertex3f(-1.0f+i*2.0/sz,-1.0f+j*2.0/sz,-1);
        glVertex3f(-1.0f+i*2.0/sz,-1.0f+j*2.0/sz, 1);
      }
  glEnd();
  glPopMatrix();
}

void Draw(AMesh &mm)
{
  AMesh::FaceIterator fi;
  glBegin(GL_TRIANGLES);
  for(fi=mm.face.begin();fi!=mm.face.end();++fi)
  {
    glNormal((*fi).V(0)->N()); if(ColorFlag) glColor((*fi).V(0)->C());  glVertex((*fi).V(0)->P());
    glNormal((*fi).V(1)->N()); if(ColorFlag) glColor((*fi).V(1)->C());  glVertex((*fi).V(1)->P());
    glNormal((*fi).V(2)->N()); if(ColorFlag) glColor((*fi).V(2)->C());  glVertex((*fi).V(2)->P());
  }
  glEnd();
}

AMesh m;
VertexVisShader<AMesh> Vis(m);

string OutNameMsh;

	
/*  Called when the window is first opened and whenever 
 *  the window is reconfigured (moved or resized).
 */
void  ViewReshape(GLsizei w, GLsizei h)
{
	ScreenW=w; ScreenH=h;
  glViewport(0,0,w,h);
}

void  ViewDisplay (void)
{
  glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
  glMatrixMode (GL_PROJECTION);   
  glLoadIdentity (); 
  gluPerspective(ViewAngle,(float)ScreenW/ScreenH,1,7);
  glMatrixMode (GL_MODELVIEW);    
  glLoadIdentity ();  
  glPushMatrix();
  QL.Apply();
  glutPrintf(5,5,"Diffuse %04.2f   Ambient %04.2f    LowPass %04.2f    HiPass %04.2f    Gamma %04.2f ",diff,ambi,lopass,hipass,gamma);
  GLfloat light_position0[] = {0.0, 10.0, 300.0, 0.0};
	glLightfv(GL_LIGHT0, GL_POSITION, light_position0);
  glPopMatrix();
  glTranslatef(0,0,-4);
  if(Q==&QL) DrawLightVector();	
  QL.GetView();
  QV.GetView();
  QV.Apply();
  if(ShowDirFlag) DrawViewVector();

  float d = 2.0/m.bbox.Diag();
  glScalef(d, d, d);
  glColor3f(diff,diff,diff); 
  glTranslate(-m.bbox.Center());
  if(LightFlag) glEnable(GL_LIGHTING);
          else glDisable(GL_LIGHTING);
  if(ColorFlag) glEnable(GL_COLOR_MATERIAL);
          else glDisable(GL_COLOR_MATERIAL);
  glColorMaterial(GL_FRONT,GL_AMBIENT);
  glMateriali(GL_FRONT,GL_SHININESS,0);
  float spec[4]={0,0,0,1};
  float ambientV[4]={ambi,ambi,ambi,1};
  float diffuseV[4]={diff,diff,diff,1};
  glMaterialfv(GL_FRONT,GL_SPECULAR,spec);
  glMaterialfv(GL_FRONT,GL_AMBIENT, ambientV);
  glMaterialfv(GL_FRONT,GL_DIFFUSE, diffuseV);
  glCullFace(GL_BACK);
    
  if(CullFlag) glEnable(GL_CULL_FACE);
  else        glDisable(GL_CULL_FACE);
 
  BuildOnePixelTexture(BaseColor,TexInd);
  Draw(m);
  glutSwapBuffers();
}
	
void ViewSpecialKey(int , int , int )
{
  glutPostRedisplay();
}
void Toggle(bool &flag) {flag = !flag;}
void UpdateVis()
{
  if(LightFlag) Vis.MapVisibility(gamma,lopass,hipass,ambi);
  if(!LightFlag) Vis.MapVisibility(gamma,lopass,hipass,1.0);
}
/*********************************************************************/
/*********************************************************************/
/*********************************************************************/
void ViewKey(unsigned char key, int , int )
{
	Point3f dir;
  switch (key) {
  case 27: exit(0);   	break;
  case 9: if(Q==&QV) Q=&QL;else Q=&QV;   	break;
	case 'l' :
		lopass=lopass+.05; printf("Lo %f, Hi %f Gamma %f\n",lopass,hipass,gamma); 
		UpdateVis();
		break;
	case 'L' :
		lopass=lopass-.05; printf("Lo %f, Hi %f Gamma %f\n",lopass,hipass,gamma); 
		UpdateVis(); break;
	case 'h' :
		hipass=hipass-.05; printf("Lo %f, Hi %f Gamma %f\n",lopass,hipass,gamma); 
		UpdateVis(); break;
	case 'H' :
		hipass=hipass+.05; printf("Lo %f, Hi %f Gamma %f\n",lopass,hipass,gamma); 
		UpdateVis(); break;
  case 'd' :  diff+=.05; printf("Ambient %f Diffuse %f, \n",ambi,diff); 		UpdateVis(); break;
  case 'D' :  diff-=.05; printf("Ambient %f Diffuse %f, \n",ambi,diff); 		UpdateVis(); break;
  case 'a' :  ambi+=.05; printf("Ambient %f Diffuse %f, \n",ambi,diff); 		UpdateVis(); break;
  case 'A' :  ambi-=.05; printf("Ambient %f Diffuse %f, \n",ambi,diff); 		UpdateVis(); break;

  case 'e' :  ambi+=.05; diff-=.05; printf("Ambient %f Diffuse %f, \n",ambi,diff); 		UpdateVis(); break;
  case 'E' :  ambi-=.05; diff+=.05; printf("Ambient %f Diffuse %f, \n",ambi,diff); 		UpdateVis(); break;

	case 'p' :
		gamma=gamma-.05; printf("Lo %f, Hi %f Gamma %f\n",lopass,hipass,gamma); 
		UpdateVis(); break;
	case 'P' :
		gamma=gamma+.05; printf("Lo %f, Hi %f Gamma %f\n",lopass,hipass,gamma); 
		UpdateVis(); break;
	case 13 : 
		//Vis.ComputeUniform(SampleNum,ViewVector,cb); 
    Vis.ComputeUniformCone(SampleNum,ViewVector, ConeAngleRad,ConeDir,cb); 
		UpdateVis(); break;
  case ' ' : {
    Point3f dir = Q->camera.ViewPoint();
    printf("ViewPoint %f %f %f\n",dir[0],dir[1],dir[2]);
    dir.Normalize();
    dir=Inverse(Q->track.Matrix())*dir;
    printf("ViewPoint %f %f %f\n",dir[0],dir[1],dir[2]);
    dir.Normalize();
		Vis.ComputeSingle(dir,ViewVector,cb); 
		UpdateVis(); 
             } break;
  case 'r' : BaseColor[0]=min(255,BaseColor[0]+2); printf("BaseColor %3i %3i %3i \n",BaseColor[0],BaseColor[1],BaseColor[2]); break;
  case 'R' : BaseColor[0]=max(  0,BaseColor[0]-2); printf("BaseColor %3i %3i %3i \n",BaseColor[0],BaseColor[1],BaseColor[2]); break;
  case 'g' : BaseColor[1]=min(255,BaseColor[1]+2); printf("BaseColor %3i %3i %3i \n",BaseColor[0],BaseColor[1],BaseColor[2]); break;
  case 'G' : BaseColor[1]=max(  0,BaseColor[1]-2); printf("BaseColor %3i %3i %3i \n",BaseColor[0],BaseColor[1],BaseColor[2]); break;
  case 'b' : BaseColor[2]=min(255,BaseColor[2]+2); printf("BaseColor %3i %3i %3i \n",BaseColor[0],BaseColor[1],BaseColor[2]); break;
  case 'B' : BaseColor[2]=max(  0,BaseColor[2]-2); printf("BaseColor %3i %3i %3i \n",BaseColor[0],BaseColor[1],BaseColor[2]); break;

  case 'v' : Toggle(ShowDirFlag); break;
  case 'V' : 
    {
      SimplePic<Color4b> snapC;
      snapC.OpenGLSnap();
      char buf[128];
      sprintf(buf,"Snap%03i.ppm",imgcnt++);
      snapC.SavePPM(buf);
    }
	case 's' :
		Vis.SmoothVisibility();
		UpdateVis(); break;
  case 'S' :
    { 
      vcg::tri::io::PlyInfo p; 
      p.mask|=vcg::ply::PLYMask::PM_VERTCOLOR /* | vcg::ply::PLYMask::PM_VERTQUALITY*/ ;
      tri::io::ExporterPLY<AMesh>::Save(m,OutNameMsh.c_str(),false,p);
    }
		break;
  case 'C' : LightFlag = !LightFlag; printf("Toggled Light %s\n",LightFlag?"on":"off"); 		UpdateVis(); break;
  case 'c' : ColorFlag = !ColorFlag; printf("Toggled Color %s\n",ColorFlag?"on":"off"); break;
  case '1' : diff=0.80f; ambi=0.10f; gamma=1.0; lopass=0.00f; hipass=1.00f; ColorFlag=false; UpdateVis(); break;
  case '2' : diff=0.65f; ambi=0.30f; gamma=1.0; lopass=0.15f; hipass=0.80f; ColorFlag=true;  UpdateVis(); break;
  case '3' : diff=0.45f; ambi=0.50f; gamma=1.0; lopass=0.20f; hipass=0.75f; ColorFlag=true;  UpdateVis(); break;
  case '4' : diff=0.35f; ambi=0.60f; gamma=1.0; lopass=0.25f; hipass=0.70f; ColorFlag=true;  UpdateVis(); break;
	}
	glutPostRedisplay(); ;
} 
void ViewMenu(int val)
{
 	 ViewKey(val, 0, 0); 
}
/*********************************************************************/
// TrackBall Functions
/*********************************************************************/

int GW,GH; // Grandezza della finestra

void ViewMouse(int button, int state, int x, int y)
{
  static int KeyMod=0;
  static int glut_buttons=0;
  //printf("ViewMouse %i %i %i %i\n",x,y,button,state);
  int m_mask = 0;
  if(state == GLUT_DOWN) {
    KeyMod=glutGetModifiers();
    if(GLUT_ACTIVE_SHIFT & KeyMod)		m_mask |=  Trackball::KEY_SHIFT;
    if(GLUT_ACTIVE_ALT & KeyMod)			m_mask |=  Trackball::KEY_ALT;
    if(GLUT_ACTIVE_CTRL & KeyMod)			m_mask |=  Trackball::KEY_CTRL;

    glut_buttons |= (1<<button);
    Q->MouseDown(x, ScreenH-y, glut_buttons | m_mask);
  } else {
    if(GLUT_ACTIVE_SHIFT & KeyMod)		m_mask |=  Trackball::KEY_SHIFT;
    if(GLUT_ACTIVE_ALT & KeyMod)			m_mask |=  Trackball::KEY_ALT;
    if(GLUT_ACTIVE_CTRL & KeyMod)			m_mask |=  Trackball::KEY_CTRL;
    glut_buttons |= (1<<button);
    Q->MouseUp(x, ScreenH-y, glut_buttons | m_mask);
  }
}

void ViewMouseMotion(int x, int y)
{
 	Q->MouseMove(x,ScreenH-y);
	glutPostRedisplay();
}

void SetLight()
{
  GLfloat light_ambient0[] = {0.0, 0.0, 0.0, 1.0};  
  GLfloat light_diffuse0[] = {1.0, 1.0, 1.0, 1.0};  
  GLfloat light_position0[] = {0.0, 10.0, 300.0, 0.0};
	glLightfv(GL_LIGHT0, GL_POSITION, light_position0);
	glLightfv(GL_LIGHT0, GL_AMBIENT, light_diffuse0);
	glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse0);
	glEnable(GL_LIGHT0);
  glLightModelfv(GL_LIGHT_MODEL_AMBIENT,light_ambient0);
  
}
 
void  ViewInit (void) {
  SetLight();
	Q->Reset();
  Q->radius= 1;
  glEnable(GL_DEPTH_TEST);
	glDepthFunc(GL_LEQUAL);
	glClearColor (0.8, 0.8, 0.8, 0.0);
	glEnable(GL_NORMALIZE);
	glEnable(GL_LIGHTING);
	
//	glEnable(GL_BLEND);
	glShadeModel(GL_SMOOTH);
//  glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
  glPixelStorei(GL_UNPACK_ALIGNMENT, 1);     
  glEnable(GL_CULL_FACE);
	glCullFace(GL_BACK);	
}



int main(int argc, char** argv)
{
	if(argc<2) {
		printf(
			"shadevis 1.0 \n"__DATE__"\n"
			"Copyright 2003-2004 Visual Computing Lab I.S.T.I. C.N.R.\n"
			"Paolo Cignoni (cignoni@isti.cnr.it)\n\n"
			"Usage: shadevis file.ply [options]\n"
			"Options:\n"
			"     -w#      WindowResolution (default 600)\n"
			"     -n#      Sample Directions (default 64)\n"
			"     -z#      z offset (default 1e-3)\n"
			"     -c       assume that the mesh is closed (slightly faster, default false)\n"
			"     -f       Flip normal of the model\n"
			"     -da #    Cone Direction Angle in degree (default 180)\n"
			"     -dv # # # Cone Direction vector (default 0 0 1)\n"			
      		 );

		return 1;
	}

	srand(time(0));
  int i=1;  
	while(i<argc 	&& (argv[i][0]=='-'))
		{
				switch(argv[i][1])
			{
        case 'd'  : if(argv[i][2] == 'a') { ConeAngleRad = math::ToRad(atof(argv[i+1])); ++i; break; }
                    if(argv[i][2] == 'v') { ConeDir = Point3f(atof(argv[i+1]),atof(argv[i+2]),atof(argv[i+3])); i+=3; break; }
                    break;
				case 'n'  : SampleNum = atoi(argv[i]+2); break;
				case 'f'  : SwapFlag=false; break;
				case 'c'  : ClosedFlag=true; break;
        case 'w'  : WindowRes= atoi(argv[i]+2); printf("Set WindowRes to %i\n",WindowRes ); break;
        case 's'  : Vis.SplitNum= atoi(argv[i]+2); printf("Set SplitNum to %i\n",Vis.SplitNum ); break;
        case 'z'  : Vis.ZTWIST = atof(argv[i]+2); printf("Set ZTWIST to %f\n",Vis.ZTWIST ); break;
        default: {printf("Error unable to parse option '%s'\n",argv[i]); exit(0);}
			}

			++i;
		}
	
  
  string basename = argv[i];
	if(!(basename.substr(basename.length()-4)==".ply"))	{
				printf("Error: Unknown file extension %s\n",basename.c_str());
				return 1;
	}
	
  // loading original mesh
  int ret=tri::io::ImporterPLY<AMesh>::Open(m,argv[i]);
	if(ret) {printf("Error unable to open mesh %s\n",argv[i]);exit(-1);}
  tri::UpdateNormals<AMesh>::PerVertexNormalized(m);
  tri::UpdateBounding<AMesh>::Box(m);
  tri::UpdateColor<AMesh>::VertexConstant(m,Color4b::White);
  Vis.IsClosedFlag=ClosedFlag;
  Vis.Init();
  UpdateVis();

  printf("Mesh bbox (%f %f %f)-(%f %f %f)\n\n",m.bbox.min[0],m.bbox.min[1],m.bbox.min[2],m.bbox.max[0],m.bbox.max[1],m.bbox.max[2]);
  OutNameMsh=(string(argv[i]).substr(0,strlen(argv[i])-4));
	OutNameMsh+="_vis.ply";
	
	printf("Mesh       Output filename %s\n",OutNameMsh.c_str());

	printf("Mesh %iv %if bbox Diag %g\n",m.vn,m.fn,m.bbox.Diag());
	
	glutInit(&argc, argv);

  glutInitDisplayMode (GLUT_DOUBLE | GLUT_RGBA | GLUT_DEPTH);
  glutInitWindowSize(WindowRes, WindowRes);
  glutInitWindowPosition (10,10);
  glutCreateWindow ("shadevis - Visual Computing Lab - vcg.isti.cnr.it ");
  glutDisplayFunc(ViewDisplay);
	glutReshapeFunc(ViewReshape); 
	glutKeyboardFunc(ViewKey);	
	glutSpecialFunc(ViewSpecialKey);	
	glutMouseFunc(ViewMouse);
	glutMotionFunc(ViewMouseMotion);

	ViewInit();	
  glewInit();	
	glutMainLoop();

	return(0);
}