Examples with Face maspack.geometry.Face used on opensource projects

Example 6 with Face

use of maspack.geometry.Face in project artisynth_core by artisynth.

the class MayaAsciiReader method recursiveAddPolygonalMeshes.

private void recursiveAddPolygonalMeshes(Node<MayaNode> root, PolygonalMesh mesh, AffineTransform3d trans, UnitInfo units) {
    // make copy so can traverse
    trans = new AffineTransform3d(trans);
    // children independently
    MayaNode data = root.getData();
    if (data instanceof MayaTransform) {
        MayaTransform dtrans = (MayaTransform) data;
        AffineTransform3d tu = new AffineTransform3d();
        dtrans.getTransform(tu);
        // convert units
        tu.p.scale(dtrans.units.length.getSI() / units.length.getSI());
        // only multiply if inherited
        if (dtrans.inheritsTransform()) {
            trans.mul(tu);
        } else {
            trans.set(tu);
        }
    } else if (data instanceof MayaMesh) {
        MayaMesh mm = (MayaMesh) data;
        PolygonalMesh mmesh = mm.getMesh();
        if (mmesh != null) {
            // transform mesh
            HashMap<Vertex3d, Vertex3d> vtxMap = new HashMap<Vertex3d, Vertex3d>();
            for (Vertex3d vtx : mmesh.getVertices()) {
                Vertex3d nvtx = new Vertex3d(vtx.pnt);
                // XXX prevent transform
                nvtx.pnt.scale(mm.units.length.getSI() / units.length.getSI());
                nvtx.pnt.transform(trans);
                vtxMap.put(vtx, nvtx);
                mesh.addVertex(nvtx);
            }
            for (Face face : mmesh.getFaces()) {
                Vertex3d[] oface = face.getVertices();
                Vertex3d[] nface = new Vertex3d[oface.length];
                for (int i = 0; i < oface.length; i++) {
                    nface[i] = vtxMap.get(oface[i]);
                }
                mesh.addFace(nface);
            }
        }
    }
    for (Node<MayaNode> child : root.getChildren()) {
        recursiveAddPolygonalMeshes(child, mesh, trans, units);
    }
}

Example 7 with Face

use of maspack.geometry.Face in project artisynth_core by artisynth.

the class AmiraMeshWriter method writeMesh.

public void writeMesh(PolygonalMesh mesh) {
    PrintWriter pw = new PrintWriter(new BufferedWriter(new OutputStreamWriter(myOstream)));
    if (!mesh.isTriangular()) {
        throw new IllegalArgumentException("Mesh must be triangular");
    }
    int nVerts = mesh.numVertices();
    int nFaces = mesh.numFaces();
    pw.println(FILE_HEADER);
    // mesh name
    if (mesh.getName() != null) {
        pw.println("# " + mesh.getName());
    }
    pw.println();
    pw.println("define Nodes " + nVerts);
    pw.println("define Triangles " + nFaces);
    pw.println();
    pw.println("Parameters {");
    // pw.println("    ContentType \"HxLineSet\"");
    // XXX confirm with amira about valid parameter set
    pw.println("}");
    pw.println();
    pw.println("Nodes { float[3] Coordinates } = @1");
    pw.println("Triangles { int[3] Nodes } = @2");
    pw.println();
    pw.println("@1 # xyz vertex coordinates");
    int idx = 0;
    for (Vertex3d vtx : mesh.getVertices()) {
        vtx.setIndex(idx++);
        pw.println(vtx.getPosition().toString(myFmt));
    }
    pw.println();
    pw.println("@2 # triangular face indices");
    for (Face face : mesh.getFaces()) {
        HalfEdge he = face.firstHalfEdge();
        Vertex3d vtx = he.getHead();
        pw.print(vtx.getIndex());
        he = he.getNext();
        vtx = he.getHead();
        pw.print(" " + vtx.getIndex());
        he = he.getNext();
        vtx = he.getHead();
        pw.println(" " + vtx.getIndex());
    }
    // end loop through faces
    pw.flush();
}

Example 8 with Face

use of maspack.geometry.Face in project artisynth_core by artisynth.

the class FemModel3d method findNearestSurfaceElement.

/**
 * Returns the nearest surface element to a specified point,
 * which is found by projecting the point onto the FEM surface.
 * The location of the projection is returned in <code>loc</code>.
 *
 * @param loc Projected location of the point onto the surface.
 * @param pnt Point for which nearest surface element is desired.
 * @return Nearest surface element.
 */
public FemElement3d findNearestSurfaceElement(Point3d loc, Point3d pnt) {
    Vector2d coords = new Vector2d();
    PolygonalMesh surf = getSurfaceMesh();
    if (surf == null || surf.numFaces() == 0) {
        surf = getInternalSurfaceMesh();
    }
    if (surf != null) {
        Face face = BVFeatureQuery.getNearestFaceToPoint(loc, coords, surf, pnt);
        FemElement3d elem = getSurfaceElement(face);
        if (elem == null) {
            throw new InternalErrorException("surface element not found for face");
        }
        return elem;
    } else {
        return null;
    }
}

Example 9 with Face

use of maspack.geometry.Face in project artisynth_core by artisynth.

the class SimpleFemWriter method writeSurfaceFile.

public void writeSurfaceFile(FemModel3d fem, PrintWriter surfaceWriter) {
    PolygonalMesh mesh = fem.getSurfaceMesh();
    for (Face face : mesh.getFaces()) {
        surfaceWriter.print(faceToken);
        for (Vertex3d vtx : face.getVertices()) {
            FemNode3d node = fem.getSurfaceNode(vtx);
            if (node != null) {
                surfaceWriter.print(" " + (node.getNumber() + nodeOffset));
            }
        }
        surfaceWriter.println();
    }
}

Example 10 with Face

use of maspack.geometry.Face in project artisynth_core by artisynth.

the class SkinMeshBody method createPointAttachment.

public PointSkinAttachment createPointAttachment(Point pnt) {
    if (!(getMesh() instanceof PolygonalMesh)) {
        return null;
    }
    PolygonalMesh mesh = (PolygonalMesh) getMesh();
    if (!mesh.isTriangular()) {
        return null;
    }
    // Find nearest face to the point; we'll need this to
    // estimate a basePosition for the attachments from the
    // start by find
    BVFeatureQuery query = new BVFeatureQuery();
    Point3d near = new Point3d();
    Vector2d uv = new Vector2d();
    Face face = query.nearestFaceToPoint(near, uv, mesh, pnt.getPosition());
    // Create a new PointSkinAttachment
    MeshDistCalc dcalc = new MeshDistCalc();
    dcalc.computeDistancesAndWeights(pnt.getPosition(), myLastSigma);
    PointSkinAttachment a = dcalc.computeDisplacementAttachment();
    a.setSkinMesh(this);
    // Now estimate the basePosition from the face vertices
    Point3d basePos = new Point3d();
    Vertex3d[] vtxs = face.getTriVertices();
    double[] wgts = new double[] { 1 - uv.x - uv.y, uv.x, uv.y };
    for (int i = 0; i < vtxs.length; i++) {
        PointSkinAttachment va = (PointSkinAttachment) myVertexAttachments.get(vtxs[i].getIndex());
        basePos.scaledAdd(wgts[i], va.getBasePosition());
    }
    a.setBasePosition(basePos);
    a.setPoint(pnt);
    return a;
}