//
// Description:
//
// Vertex selection.
//
// Arguments:
//
// selectInfo - the selection state information
// selectionList - the list of selected items to add to
// worldSpaceSelectPts -
//
public bool selectVertices( MSelectInfo selectInfo,
MSelectionList selectionList,
MPointArray worldSpaceSelectPts)
{
bool selected = false;
M3dView view = selectInfo.view;
MPoint xformedPoint = new MPoint();
MPoint selectionPoint = new MPoint();
double z = 0.0;
double previousZ = 0.0;
int closestPointVertexIndex = -1;
MDagPath path = selectInfo.multiPath;
// Create a component that will store the selected vertices
//
MFnSingleIndexedComponent fnComponent = new MFnSingleIndexedComponent();
MObject surfaceComponent = fnComponent.create( MFn.Type.kMeshVertComponent );
uint vertexIndex;
// if the user did a single mouse click and we find > 1 selection
// we will use the alignmentMatrix to find out which is the closest
//
MMatrix alignmentMatrix = new MMatrix();
MPoint singlePoint = new MPoint();
bool singleSelection = selectInfo.singleSelection;
if( singleSelection ) {
alignmentMatrix = selectInfo.alignmentMatrix;
}
// Get the geometry information
//
apiMesh meshNode = (apiMesh)surfaceShape;
apiMeshGeom geom = meshNode.meshGeom();
// Loop through all vertices of the mesh and
// see if they lie withing the selection area
//
uint numVertices = geom.vertices.length;
for ( vertexIndex=0; vertexIndex<numVertices; vertexIndex++ )
{
MPoint currentPoint = geom.vertices[ (int)vertexIndex ];
// Sets OpenGL's render mode to select and stores
// selected items in a pick buffer
//
view.beginSelect();
OpenGL.glBegin(OpenGL.GL_POINTS);
OpenGL.glVertex3f((float)currentPoint[0],
(float)currentPoint[1],
(float)currentPoint[2] );
OpenGL.glEnd();
if ( view.endSelect() > 0 ) // Hit count > 0
{
selected = true;
if ( singleSelection ) {
xformedPoint = currentPoint;
xformedPoint.homogenize();
xformedPoint.multiplyEqual( alignmentMatrix );
z = xformedPoint.z;
if ( closestPointVertexIndex < 0 || z > previousZ ) {
closestPointVertexIndex = (int)vertexIndex;
singlePoint = currentPoint;
previousZ = z;
}
} else {
// multiple selection, store all elements
//
fnComponent.addElement( (int)vertexIndex );
}
}
}
// If single selection, insert the closest point into the array
//
if ( selected && selectInfo.singleSelection ) {
fnComponent.addElement(closestPointVertexIndex);
// need to get world space position for this vertex
//
selectionPoint = singlePoint;
selectionPoint.multiplyEqual( path.inclusiveMatrix );
}
// Add the selected component to the selection list
//
if ( selected ) {
MSelectionList selectionItem = new MSelectionList();
selectionItem.add( path, surfaceComponent );
MSelectionMask mask = new MSelectionMask( MSelectionMask.SelectionType.kSelectComponentsMask );
selectInfo.addSelection(
selectionItem, selectionPoint,
selectionList, worldSpaceSelectPts,
mask, true );
}
return selected;
}
public bool selectVertices(MSelectInfo selectInfo,
MSelectionList selectionList,
MPointArray worldSpaceSelectPts)
//
// Description:
//
// Vertex selection.
//
// Arguments:
//
// selectInfo - the selection state information
// selectionList - the list of selected items to add to
// worldSpaceSelectPts -
//
{
bool selected = false;
M3dView view = selectInfo.view;
MPoint xformedPoint = new MPoint();
MPoint selectionPoint = new MPoint();
double z = 0.0;
double previousZ = 0.0;
int closestPointVertexIndex = -1;
MDagPath path = selectInfo.multiPath;
// Create a component that will store the selected vertices
//
MFnSingleIndexedComponent fnComponent = new MFnSingleIndexedComponent();
MObject surfaceComponent = fnComponent.create(MFn.Type.kMeshVertComponent);
uint vertexIndex;
// if the user did a single mouse click and we find > 1 selection
// we will use the alignmentMatrix to find out which is the closest
//
MMatrix alignmentMatrix = new MMatrix();
MPoint singlePoint = new MPoint();
bool singleSelection = selectInfo.singleSelection;
if (singleSelection)
{
alignmentMatrix = selectInfo.alignmentMatrix;
}
// Get the geometry information
//
apiMesh meshNode = (apiMesh)surfaceShape;
apiMeshGeom geom = meshNode.meshGeom();
// Loop through all vertices of the mesh and
// see if they lie withing the selection area
//
uint numVertices = geom.vertices.length;
for (vertexIndex = 0; vertexIndex < numVertices; vertexIndex++)
{
MPoint currentPoint = geom.vertices[(int)vertexIndex];
// Sets OpenGL's render mode to select and stores
// selected items in a pick buffer
//
view.beginSelect();
OpenGL.glBegin(OpenGL.GL_POINTS);
OpenGL.glVertex3f((float)currentPoint[0],
(float)currentPoint[1],
(float)currentPoint[2]);
OpenGL.glEnd();
if (view.endSelect() > 0) // Hit count > 0
{
selected = true;
if (singleSelection)
{
xformedPoint = currentPoint;
xformedPoint.homogenize();
xformedPoint.multiplyEqual(alignmentMatrix);
z = xformedPoint.z;
if (closestPointVertexIndex < 0 || z > previousZ)
{
closestPointVertexIndex = (int)vertexIndex;
singlePoint = currentPoint;
previousZ = z;
}
}
else
{
// multiple selection, store all elements
//
fnComponent.addElement((int)vertexIndex);
}
}
}
// If single selection, insert the closest point into the array
//
if (selected && selectInfo.singleSelection)
{
fnComponent.addElement(closestPointVertexIndex);
// need to get world space position for this vertex
//
selectionPoint = singlePoint;
selectionPoint.multiplyEqual(path.inclusiveMatrix);
}
// Add the selected component to the selection list
//
if (selected)
{
MSelectionList selectionItem = new MSelectionList();
selectionItem.add(path, surfaceComponent);
MSelectionMask mask = new MSelectionMask(MSelectionMask.SelectionType.kSelectComponentsMask);
selectInfo.addSelection(
selectionItem, selectionPoint,
selectionList, worldSpaceSelectPts,
mask, true);
}
return(selected);
}
