[ https://issues.apache.org/jira/browse/MATH-780?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13258362#comment-13258362 ]
Andrew Willis edited comment on MATH-780 at 4/20/12 4:42 PM: ------------------------------------------------------------- The code in BSPMesh2.java produces the following error when I run it. If you comment in the line that re-assigns the coordinate data to be cubeCoords1, then the code works fine. The only difference in the two data sets is that one coordinate has changed by a small amount. Exception in thread "main" java.lang.ClassCastException: org.apache.commons.math3.geometry.partitioning.BoundaryAttribute cannot be cast to java.lang.Boolean at org.apache.commons.math3.geometry.euclidean.twod_exact.PolygonsSet.computeGeometricalProperties(PolygonsSet.java:135) at org.apache.commons.math3.geometry.partitioning.AbstractRegion.getSize(AbstractRegion.java:380) at org.apache.commons.math3.geometry.euclidean.threed_exact.PolyhedronsSet$FacetsContributionVisitor.addContribution(PolyhedronsSet.java:171) at org.apache.commons.math3.geometry.euclidean.threed_exact.PolyhedronsSet$FacetsContributionVisitor.visitInternalNode(PolyhedronsSet.java:153) at org.apache.commons.math3.geometry.partitioning.BSPTree.visit(BSPTree.java:262) at org.apache.commons.math3.geometry.partitioning.BSPTree.visit(BSPTree.java:261) at org.apache.commons.math3.geometry.partitioning.BSPTree.visit(BSPTree.java:261) at org.apache.commons.math3.geometry.partitioning.BSPTree.visit(BSPTree.java:263) at org.apache.commons.math3.geometry.partitioning.BSPTree.visit(BSPTree.java:261) at org.apache.commons.math3.geometry.euclidean.threed_exact.PolyhedronsSet.computeGeometricalProperties(PolyhedronsSet.java:118) at org.apache.commons.math3.geometry.partitioning.AbstractRegion.getSize(AbstractRegion.java:380) at datastructures.j3d.bsptree.BSPMesh.<init>(BSPMesh.java:130) at datastructures.j3d.bsptree.BSPMesh2.main(BSPMesh2.java:206) was (Author: arwillis): This code produces the following error: Exception in thread "main" java.lang.ClassCastException: org.apache.commons.math3.geometry.partitioning.BoundaryAttribute cannot be cast to java.lang.Boolean at org.apache.commons.math3.geometry.euclidean.twod_exact.PolygonsSet.computeGeometricalProperties(PolygonsSet.java:135) at org.apache.commons.math3.geometry.partitioning.AbstractRegion.getSize(AbstractRegion.java:380) at org.apache.commons.math3.geometry.euclidean.threed_exact.PolyhedronsSet$FacetsContributionVisitor.addContribution(PolyhedronsSet.java:171) at org.apache.commons.math3.geometry.euclidean.threed_exact.PolyhedronsSet$FacetsContributionVisitor.visitInternalNode(PolyhedronsSet.java:153) at org.apache.commons.math3.geometry.partitioning.BSPTree.visit(BSPTree.java:262) at org.apache.commons.math3.geometry.partitioning.BSPTree.visit(BSPTree.java:261) at org.apache.commons.math3.geometry.partitioning.BSPTree.visit(BSPTree.java:261) at org.apache.commons.math3.geometry.partitioning.BSPTree.visit(BSPTree.java:263) at org.apache.commons.math3.geometry.partitioning.BSPTree.visit(BSPTree.java:261) at org.apache.commons.math3.geometry.euclidean.threed_exact.PolyhedronsSet.computeGeometricalProperties(PolyhedronsSet.java:118) at org.apache.commons.math3.geometry.partitioning.AbstractRegion.getSize(AbstractRegion.java:380) at datastructures.j3d.bsptree.BSPMesh.<init>(BSPMesh.java:130) at datastructures.j3d.bsptree.BSPMesh2.main(BSPMesh2.java:206) > BSPTree class and recovery of a Euclidean 3D BRep > ------------------------------------------------- > > Key: MATH-780 > URL: https://issues.apache.org/jira/browse/MATH-780 > Project: Commons Math > Issue Type: Bug > Affects Versions: 3.0 > Environment: Linux > Reporter: Andrew Willis > Labels: BSPTree, euclidean.threed > Attachments: BSPMesh2.java > > > New to the work here. Thanks for your efforts on this code. > I create a BSPTree from a BoundaryRep (Brep) my test Brep is a tetrahedron as > represented by a float array containing 4 3D points (x,y,z) order and an > array of indices (4 triplets for the 4 faces of the tet). I construct a > BSPMesh() as shown in the code below. I can construct the PolyhedronsSet() > however, when I interrogate the shape (with getSize() or getBoundarySize() I > get infinity back as a result). When I try to get back the BRep (by > traversing the BSPTree resulting from PolyhedronsSet.getTree(true) and > getting the PolygonsSet() associated with each 3D SubPlane, I get a null > vertex back and strange values. > Any ideas? > public class BSPMesh { > public BSPMesh(float[] coords, int[] indices) { > double size; > setBoundingBox(coords); > ArrayList<SubHyperplane<Euclidean3D>> subHyperplaneList = new > ArrayList(); > for (int idx = 0; idx < indices.length; idx += 3) { > int idxA = indices[idx] * 3; > int idxB = indices[idx + 1] * 3; > int idxC = indices[idx + 2] * 3; > Vector3D v_1 = new Vector3D(coords[idxA], coords[idxA + 1], > coords[idxA + 2]); > Vector3D v_2 = new Vector3D(coords[idxB], coords[idxB + 1], > coords[idxB + 2]); > Vector3D v_3 = new Vector3D(coords[idxC], coords[idxC + 1], > coords[idxC + 2]); > Vector3D[] vertices = {v_1, v_2, v_3}; > Plane polyPlane = new Plane(v_1, v_2, v_3); > ArrayList<SubHyperplane<Euclidean2D>> lines = new ArrayList(); > Vector2D[] projPts = new Vector2D[vertices.length]; > for (int ptIdx=0; ptIdx < projPts.length; ptIdx++) { > projPts[ptIdx] = polyPlane.toSubSpace(vertices[ptIdx]); > } > SubLine lineInPlane = null; > for (int ptIdx=0; ptIdx < projPts.length; ptIdx++) { > lineInPlane = new SubLine(projPts[ptIdx], > projPts[(ptIdx+1)%projPts.length]); > lines.add(lineInPlane); > } > Region<Euclidean2D> polyRegion = new PolygonsSet(lines); > SubPlane polygon = new SubPlane(polyPlane, polyRegion); > size = polyRegion.getSize(); // correct size here > Vector3D[][] verticesTest = getVertices(polygon); // correctly > retrieves the BRep for each face > subHyperplaneList.add(polygon); > } > PolyhedronsSet polyhedronsSet = new PolyhedronsSet(subHyperplaneList); > BSPTree<Euclidean3D> myTree = polyhedronsSet.getTree(true); > size = polyhedronsSet.getSize(); // strange Inf returned > size = polyhedronsSet2.getBoundarySize(); // strange Inf > returned > // Member variable and other code for extracting the BRep not > included here... can include if desired > //tree = myTree; > //Vector3D[][] vertices = getVertices((SubPlane) ((BoundaryAttribute) > tree.getAttribute()).getPlusOutside()); // strange values returned here > System.out.println("END"); > } > public static void main(String[] args) { > float[] tetCoords = {1, 0, 0, > 2, 0, 0, > 1, 1, 0, > 1, 0, 1}; > int[] tetIndices = {0, 1, 2, > 0, 1, 3, > 0, 2, 3, > 2, 1, 3}; > BSPMesh blah = new BSPMesh(tetCoords, tetIndices); > } > } -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira