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Removed glut. Added ifdef guards and namespace. 

Added bool return value to the pick function
This commit is contained in:
Paolo Cignoni 2006-02-13 13:06:34 +00:00
parent 1f2ff388d2
commit c01d03e1ee
1 changed files with 19 additions and 3 deletions
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22
wrap/gl/picking.h
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@ -28,11 +28,17 @@ This file contains two function providing the standard way to do picking using o
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$Log: not supported by cvs2svn $
Revision 1.1 2005/12/03 09:36:28 ganovelli
*** empty log message ***
****************************************************************************/
#ifndef WRAP_GL_PICKING_H
#define WRAP_GL_PICKING_H
#include <algorithm>
#include <GL/glut.h>
namespace vcg
{
template <class TO_PICK_CONT_TYPE>
int Pick( const int & x, const int &y,
@ -100,8 +106,11 @@ int Pick( const int & x, const int &y,
return result.size();
}
// 10/2/06 Slightly changed the interface.
// Return value is used to determine if the picked point was against the far plane
// (and therefore nothing was picked)
template <class PointType>
PointType Pick(const int & x, const int &y){
bool Pick(const int & x, const int &y, PointType &pp){
double res[3];
GLdouble mm[16],pm[16]; GLint vp[4];
glGetDoublev(GL_MODELVIEW_MATRIX,mm);
@ -110,7 +119,14 @@ PointType Pick(const int & x, const int &y){
float pix;
glReadPixels(x,y,1,1,GL_DEPTH_COMPONENT,GL_FLOAT,&pix);
GLfloat depthrange[2]={0,0};
glGetFloatv(GL_DEPTH_RANGE,depthrange);
if(pix==depthrange[1]) return false;
gluUnProject(x,y,pix,mm,pm,vp,&res[0],&res[1],&res[2]);
return PointType (res[0],res[1],res[2]);
pp=PointType (res[0],res[1],res[2]);
return true;
}
} // end namespace
#endif