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added vertex picking

This commit is contained in:
Paolo Cignoni 2010-02-26 16:20:15 +00:00
parent 96d770c828
commit c2456526fd
1 changed files with 66 additions and 3 deletions
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69
wrap/gl/pick.h
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@ -41,8 +41,10 @@ template <class MESH_TYPE>
class GLPickTri
{
typedef typename MESH_TYPE::FaceIterator FaceIterator;
typedef typename MESH_TYPE::FacePointer FacePointer;
typedef typename MESH_TYPE::VertexType VertexType;
typedef typename MESH_TYPE::VertexIterator VertexIterator;
typedef typename MESH_TYPE::FacePointer FacePointer;
typedef typename MESH_TYPE::VertexPointer VertexPointer;
typedef typename MESH_TYPE::VertexType VertexType;
public:
@ -58,7 +60,68 @@ public:
fi=NULL;
return false;
}
static int PickVert(int x, int y, MESH_TYPE &m, std::vector<VertexPointer> &result, int width=4, int height=4,bool sorted=true)
{
result.clear();
if(width==0 ||height==0) return 0;
long hits;
int sz=m.vert.size()*5;
GLuint *selectBuf =new GLuint[sz];
glSelectBuffer(sz, selectBuf);
glRenderMode(GL_SELECT);
glInitNames();
/* Because LoadName() won't work with no names on the stack */
glPushName(-1);
double mp[16];
GLint viewport[4];
glGetIntegerv(GL_VIEWPORT,viewport);
glMatrixMode(GL_PROJECTION);
glGetDoublev(GL_PROJECTION_MATRIX ,mp);
glPushMatrix();
glLoadIdentity();
gluPickMatrix(x, y, width, height, viewport);
glMultMatrixd(mp);
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
int vcnt=0;
VertexIterator vi;
for(vi=m.vert.begin();vi!=m.vert.end();++vi)
{
if(!(*vi).IsD())
{
glLoadName(vcnt);
glBegin(GL_POINTS);
glVertex( (*vi).P() );
glEnd();
}
vcnt++; // the counter should advance even for deleted faces!
}
glPopMatrix();
glMatrixMode(GL_PROJECTION);
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
hits = glRenderMode(GL_RENDER);
std::vector< std::pair<double,unsigned int> > H;
for(long ii=0;ii<hits;ii++){
H.push_back( std::pair<double,unsigned int>(selectBuf[ii*4+1]/4294967295.0,selectBuf[ii*4+3]));
}
if(sorted)
std::sort(H.begin(),H.end());
result.resize(H.size());
for(long ii=0;ii<hits;ii++){
VertexIterator vi=m.vert.begin();
advance(vi ,H[ii].second);
result[ii]=&*vi;
}
delete [] selectBuf;
return result.size();
}
static int PickFace(int x, int y, MESH_TYPE &m, std::vector<FacePointer> &result, int width=4, int height=4,bool sorted=true)
{
result.clear();
@ -150,7 +213,7 @@ public:
std::vector<FacePointer> result;
PickFace(x,y,m,result,width,height,sorted);
float LocalEpsilon = 0.001f;
for(int i =0;i<result.size();++i)
for(size_t i =0;i<result.size();++i)
{
typename VertexType::CoordType v=Barycenter(*(result[i]));
GLdouble tx,ty,tz;