CRhinoCommand::result CCommandSampleBrepBoxWithMesh::RunCommand( const CRhinoCommandContext& context )
{
// Get the corners of the box
CArgsRhinoGetBox args;
ON_3dPoint corners[8];
CRhinoCommand::result rc = RhinoGetBox( args, corners );
if( rc != CRhinoCommand::success )
return rc;
// Create a brep from the corners.
// Note, we are responsible for this memory.
ON_Brep* brep = ON_BrepBox( corners );
if( 0 == brep )
{
ON_Plane plane( corners[0], corners[1], corners[3] );
if( ON_ZERO_TOLERANCE > plane.plane_equation.ValueAt(corners[7]) )
RhinoApp().Print( L"Box must have a height.\n" );
return CRhinoCommand::failure;
}
// Meshing parameters to use when creating a render mesh.
const ON_MeshParameters& mp = context.m_doc.Properties().RenderMeshParameters();
// Calculates polygon mesh approximation of the brep.
// Note, we are responsible for this memory.
ON_SimpleArray<ON_Mesh*> meshes( brep->m_F.Count() );
int mesh_count = brep->CreateMesh( mp, meshes );
if( mesh_count == brep->m_F.Count() )
{
// Remove an previous values of this type of mesh.
// Note, not necessary with new ON_Brep objects.
brep->DestroyMesh( ON::render_mesh, true );
// Transfer meshes from meshes[] array to brep->m_F[].
// Note, brep will delete meshes.
for( int i = 0; i < mesh_count; i++ )
{
if( meshes[i] )
{
ON_BrepFace& face = brep->m_F[i];
// Again, not necessary with new ON_Brep objects
face.DestroyMesh( ON::render_mesh, true );
face.SetMesh( ON::render_mesh, meshes[i] );
}
}
// Create the runtime brep object
CRhinoBrepObject* brep_obj = new CRhinoBrepObject();
// Attach the brep.
// Note, object will delete brep.
brep_obj->SetBrep( brep );
// Add object to the doucment
if( !context.m_doc.AddObject(brep_obj) )
{
delete brep_obj; // Don't leak...
return CRhinoCommand::failure;
}
}
context.m_doc.Redraw();
return CRhinoCommand::success;
}
