private void GenerateWireFrameGeometry(IntPtr ifcModel, IFCItem ifcItem)
{
if (ifcItem.ifcID != IntPtr.Zero)
{
IntPtr noVertices = IntPtr.Zero, noIndices = IntPtr.Zero;
_ifcEngine.InitializeModellingInstance(ifcModel, ref noVertices, ref noIndices, 0, ifcItem.ifcID);
if (noVertices != IntPtr.Zero && noIndices != IntPtr.Zero)
{
ifcItem.noVerticesForWireFrame = noVertices.ToInt32();
ifcItem.verticesForWireFrame = new float[3 * noVertices.ToInt32()];
ifcItem.indicesForWireFrame = new int[noIndices.ToInt32()];
float[] pVertices = new float[noVertices.ToInt32() * 3];
_ifcEngine.FinalizeModelling(ifcModel, pVertices, ifcItem.indicesForWireFrame, IntPtr.Zero);
int i = 0;
while (i < noVertices.ToInt32())
{
ifcItem.verticesForWireFrame[3 * i + 0] = pVertices[3 * i + 0];
ifcItem.verticesForWireFrame[3 * i + 1] = pVertices[3 * i + 1];
ifcItem.verticesForWireFrame[3 * i + 2] = pVertices[3 * i + 2];
i++;
}
;
ifcItem.noPrimitivesForWireFrame = 0;
ifcItem.indicesForWireFrameLineParts = new int[2 * noIndices.ToInt32()];
int faceCnt = _ifcEngine.GetConceptualFaceCount(ifcItem.ifcID).ToInt32();
for (int j = 0; j < faceCnt; j++)
{
IntPtr startIndexFacesPolygons = IntPtr.Zero, noIndicesFacesPolygons = IntPtr.Zero, nonValue = IntPtr.Zero, nonValue1 = IntPtr.Zero, nonValue2 = IntPtr.Zero;
_ifcEngine.GetConceptualFaceEx(ifcItem.ifcID, new IntPtr(j), ref nonValue, ref nonValue, ref nonValue, ref nonValue, ref nonValue, ref nonValue1, ref startIndexFacesPolygons, ref noIndicesFacesPolygons, ref nonValue2, ref nonValue2);
i = 0;
int lastItem = -1;
while (i < noIndicesFacesPolygons.ToInt32())
{
if (lastItem >= 0 && ifcItem.indicesForWireFrame[startIndexFacesPolygons.ToInt32() + i] >= 0)
{
ifcItem.indicesForWireFrameLineParts[2 * ifcItem.noPrimitivesForWireFrame + 0] = lastItem;
ifcItem.indicesForWireFrameLineParts[2 * ifcItem.noPrimitivesForWireFrame + 1] = ifcItem.indicesForWireFrame[startIndexFacesPolygons.ToInt32() + i];
ifcItem.noPrimitivesForWireFrame++;
}
lastItem = ifcItem.indicesForWireFrame[startIndexFacesPolygons.ToInt32() + i];
i++;
}
}
}
}
}