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Added PickFaceSW for selecting faces in a rectangular region.

This commit is contained in:
Paolo Cignoni 2014-04-07 14:49:07 +00:00
parent bf1e2977d0
commit 306c334877
1 changed files with 67 additions and 5 deletions
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72
wrap/gl/pick.h
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@ -61,6 +61,7 @@ public:
return false;
}
static Point3f Proj(const Eigen::Matrix4f &M, const float * viewport, Point3f &p)
{
const float vx=viewport[0];
@ -80,11 +81,24 @@ public:
return sc;
}
static void FillProjectedVector(MESH_TYPE &m, std::vector<Point3f> &pVec, const Eigen::Matrix4f &M, const float * viewportF)
{
pVec.resize(m.vert.size());
for(size_t i=0;i<m.vert.size();++i) if(!m.vert[i].IsD())
{
pVec[i] = Proj(M, viewportF,m.vert[i].P());
}
}
static int PickVertSW(int x, int y, MESH_TYPE &m, std::vector<VertexPointer> &result, int width=4, int height=4,bool sorted=true)
{
result.clear();
Eigen::Matrix4d mp,mm;
Eigen::Matrix4f M;
static Eigen::Matrix4f lastM;
static MESH_TYPE *lastm=0;
static std::vector<Point3f> pVec;
GLint viewport[4];
Box2f reg;
reg.Add(Point2f(x-width/2.0f,y-height/2.0f));
@ -93,17 +107,26 @@ public:
float viewportF[4];
for(int i=0;i<4;++i) viewportF[i]=viewport[i];
glGetDoublev(GL_PROJECTION_MATRIX ,mp.data());
glGetDoublev(GL_MODELVIEW_MATRIX,mm.data());
glGetDoublev(GL_PROJECTION_MATRIX, mp.data());
glGetDoublev(GL_MODELVIEW_MATRIX, mm.data());
M = (mp*mm).cast<float>();
for(VertexIterator vi=m.vert.begin();vi!=m.vert.end();++vi)if(!vi->IsD())
if(M!=lastM || &m != lastm)
{
Point3f pp = Proj(M,viewportF,vi->P());
FillProjectedVector(m,pVec,M,viewportF);
lastM = M;
lastm = &m;
}
for(size_t i=0;i<m.vert.size();++i) if(!m.vert[i].IsD())
{
Point3f &pp = pVec[i];
if(pp[0]<reg.min[0]) continue;
if(pp[0]>reg.max[0]) continue;
if(pp[1]<reg.min[1]) continue;
if(pp[1]>reg.max[1]) continue;
result.push_back(&*vi);
result.push_back(&m.vert[i]);
}
return result.size();
}
@ -170,6 +193,45 @@ public:
return result.size();
}
static int PickFaceSW(int x, int y, MESH_TYPE &m, std::vector<FacePointer> &result, int width=4, int height=4)
{
result.clear();
Eigen::Matrix4d mp,mm;
Eigen::Matrix4f M;
static Eigen::Matrix4f lastM;
static MESH_TYPE *lastm=0;
static std::vector<Point3f> pVec;
GLint viewport[4];
Box3f reg;
reg.Add(Point3f(x-width/2.0f,y-height/2.0f,-1.0f));
reg.Add(Point3f(x+width/2.0f,y+height/2.0f,1.0f));
glGetIntegerv(GL_VIEWPORT,viewport);
float viewportF[4];
for(int i=0;i<4;++i) viewportF[i]=viewport[i];
glGetDoublev(GL_PROJECTION_MATRIX, mp.data());
glGetDoublev(GL_MODELVIEW_MATRIX, mm.data());
M = (mp*mm).cast<float>();
if(M!=lastM || &m != lastm)
{
FillProjectedVector(m,pVec,M,viewportF);
lastM = M;
lastm = &m;
}
for(size_t i=0;i<m.face.size();++i) if(!m.face[i].IsD())
{
const Point3f &p0 = pVec[tri::Index(m,m.face[i].V(0))];
const Point3f &p1 = pVec[tri::Index(m,m.face[i].V(1))];
const Point3f &p2 = pVec[tri::Index(m,m.face[i].V(2))];
if(IntersectionTriangleBox(reg,p0,p1,p2))
result.push_back(&m.face[i]);
}
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();