C++ (Cpp) CWplane::intersect示例

示例#1

文件： hatching_group_fixed.cpp 项目： QuLogic/jot-lib

/////////////////////////////////////
// slice_mesh_with_plane()
/////////////////////////////////////
void
HatchingGroupFixed::slice_mesh_with_plane(
   Bface *f, CWplane &wpPlane, Wpt_list &wlList)
{
   Bface *nxtFace1, *nxtFace2;
   Bedge *nxtEdge1, *nxtEdge2;

   assert(f->front_facing());

   nxtFace1 = f->plane_walk(nullptr,wpPlane,nxtEdge1);
   assert(nxtEdge1);

   nxtFace2 = f->plane_walk(nxtEdge1,wpPlane,nxtEdge2);
   assert(nxtEdge2);

   Wpt_list wlList1;
   Wpt_list wlList2;

   wlList1.push_back(wpPlane.intersect(nxtEdge1->line()));
   wlList2.push_back(wpPlane.intersect(nxtEdge2->line()));

   //So theres at least 2 pts in the final list...

	//sky box fix prevents infinite loops for sky box type geometry
    //where the camera is contained inside the object
    //points are checked against view volume

   while (nxtFace1 && nxtFace1->front_facing()) {
      nxtFace1 = nxtFace1->plane_walk(nxtEdge1,wpPlane,nxtEdge1);

      if (nxtEdge1) {
         Wpt temp_pt = wpPlane.intersect(nxtEdge1->line()); //sky box fix
         if (!temp_pt.in_frustum()) {
            break;
         }
         wlList1.push_back(temp_pt);
      } else {
         cerr << "Slice Mesh :: assert(!nxtFace1)" << endl;
         assert(!nxtFace1);
      }
   }

   while (nxtFace2 && nxtFace2->front_facing()) {
      nxtFace2 = nxtFace2->plane_walk(nxtEdge2,wpPlane,nxtEdge2);

      if (nxtEdge2) {
         Wpt temp_pt =wpPlane.intersect(nxtEdge2->line()); //sky box fix
         if (!temp_pt.in_frustum()) {
            break;
         }

         wlList2.push_back(temp_pt);
      } else {
         cerr << "Slice Mesh :: assert(!nxtFace2)" << endl;
         assert(!nxtFace2);
      }
   }

   wlList.insert(wlList.end(), wlList1.rbegin(), wlList1.rend());
   wlList.insert(wlList.end(), wlList2.begin(), wlList2.end());
}

示例#2

文件： hatching_group_fixed.C 项目： ArnaudGastinel/jot-lib

/////////////////////////////////////
// slice_mesh_with_plane()
/////////////////////////////////////
void
HatchingGroupFixed::slice_mesh_with_plane(
   Bface *f, CWplane &wpPlane, Wpt_list &wlList)
{
   Bface *nxtFace1, *nxtFace2;
   Bedge *nxtEdge1, *nxtEdge2;

   assert(f->front_facing());

   nxtFace1 = f->plane_walk(0,wpPlane,nxtEdge1);
   assert(nxtEdge1);

   nxtFace2 = f->plane_walk(nxtEdge1,wpPlane,nxtEdge2);
   assert(nxtEdge2);

   Wpt_list wlList1;
   Wpt_list wlList2;

   wlList1 += wpPlane.intersect(nxtEdge1->line());
   wlList2 += wpPlane.intersect(nxtEdge2->line());

   //So theres at least 2 pts in the final list...

	//sky box fix prevents infinite loops for sky box type geometry
    //where the camera is contained inside the object
    //points are checked against view volume

   while (nxtFace1 && (nxtFace1->front_facing())) {
      nxtFace1 = nxtFace1->plane_walk(nxtEdge1,wpPlane,nxtEdge1);

      if (nxtEdge1) {
		Wpt temp_pt = wpPlane.intersect(nxtEdge1->line()); //sky box fix
		if (!temp_pt.in_frustum())
		{
			break;
		}
         wlList1 += temp_pt;
      }
      else {
		  cerr << "Slice Mesh :: assert(!nxtFace1)" << endl;
         assert(!nxtFace1);
      }
   }

   while (nxtFace2 && (nxtFace2->front_facing())) {
      nxtFace2 = nxtFace2->plane_walk(nxtEdge2,wpPlane,nxtEdge2);

      if (nxtEdge2) {
		  Wpt temp_pt =wpPlane.intersect(nxtEdge2->line()); //sky box fix
		if (!temp_pt.in_frustum())
		{
			break;
		}

         wlList2 += temp_pt;
      }
      else {
		 cerr << "Slice Mesh :: assert(!nxtFace2)" << endl;
         assert(!nxtFace2);
      }
   }

   int k;
   for (k = wlList1.num()-1; k >= 0; k--) {
      wlList += wlList1[k];
   }
   //wlList += wIsect;
   for (k=0; k < wlList2.num(); k++) {
      wlList += wlList2[k];
   }
}