// Main selection routine
//
public override bool select(MSelectInfo selectInfo,
MSelectionList selectionList,
MPointArray worldSpaceSelectPts)
{
bool selected = false;
bool componentSelected = false;
bool hilited = false;
apiSimpleShape shapeNode = surfaceShape as apiSimpleShape;
if (shapeNode == null)
{
return(false);
}
hilited = (selectInfo.displayStatus == M3dView.DisplayStatus.kHilite);
if (hilited)
{
componentSelected = selectVertices(selectInfo, selectionList, worldSpaceSelectPts);
selected = selected || componentSelected;
}
if (!selected)
{
// NOTE: If the geometry has an intersect routine it should
// be called here with the selection ray to determine if the
// the object was selected.
selected = true;
MSelectionMask priorityMask = new MSelectionMask(MSelectionMask.SelectionType.kSelectNurbsSurfaces);
MSelectionList item = new MSelectionList();
item.add(selectInfo.selectPath);
MPoint xformedPt;
if (selectInfo.singleSelection)
{
MPoint center = shapeNode.boundingBox().center;
xformedPt = center.multiply(selectInfo.selectPath.inclusiveMatrix);
}
else
{
xformedPt = new MPoint();
}
selectInfo.addSelection(item, xformedPt, selectionList,
worldSpaceSelectPts, priorityMask, false);
}
return(selected);
}
public bool selectVertices(MSelectInfo selectInfo,
MSelectionList selectionList,
MPointArray worldSpaceSelectPts)
{
bool selected = false;
M3dView view = selectInfo.view;
MPoint xformedPoint;
MPoint currentPoint = new MPoint();
MPoint selectionPoint = new MPoint();
double z, 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);
int 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
//
apiSimpleShape shape = surfaceShape as apiSimpleShape;
MVectorArray geom = shape.controlPoints;
// Loop through all vertices of the mesh and
// see if they lie withing the selection area
//
int numVertices = (int)geom.length;
for (vertexIndex = 0; vertexIndex < numVertices; vertexIndex++)
{
MVector point = geom[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)point[0],
(float)point[1],
(float)point[2]);
OpenGL.glEnd();
if (view.endSelect() > 0) // Hit count > 0
{
selected = true;
if (singleSelection)
{
xformedPoint = currentPoint;
xformedPoint.homogenize();
xformedPoint = xformedPoint.multiply(alignmentMatrix);
z = xformedPoint.z;
if (closestPointVertexIndex < 0 || z > previousZ)
{
closestPointVertexIndex = vertexIndex;
singlePoint = currentPoint;
previousZ = z;
}
}
else
{
// multiple selection, store all elements
//
fnComponent.addElement(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 = selectionPoint.multiply(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)
{
bool selected = false;
M3dView view = selectInfo.view;
MPoint xformedPoint;
MPoint currentPoint = new MPoint();
MPoint selectionPoint = new MPoint();
double z, 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);
int 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
//
apiSimpleShape shape = surfaceShape as apiSimpleShape;
MVectorArray geom = shape.controlPoints;
// Loop through all vertices of the mesh and
// see if they lie withing the selection area
//
int numVertices = (int)geom.length;
for (vertexIndex = 0; vertexIndex < numVertices; vertexIndex++)
{
MVector point = geom[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)point[0],
(float)point[1],
(float)point[2]);
OpenGL.glEnd();
if (view.endSelect() > 0) // Hit count > 0
{
selected = true;
if (singleSelection)
{
xformedPoint = currentPoint;
xformedPoint.homogenize();
xformedPoint = xformedPoint.multiply(alignmentMatrix);
z = xformedPoint.z;
if (closestPointVertexIndex < 0 || z > previousZ)
{
closestPointVertexIndex = vertexIndex;
singlePoint = currentPoint;
previousZ = z;
}
}
else
{
// multiple selection, store all elements
//
fnComponent.addElement(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 = selectionPoint.multiply(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);
}
