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

Example 46 with Face

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

the class MFreeMeshComp method createPointAttachment.

public PointFem3dAttachment createPointAttachment(Point pnt) {
    if (!(getMesh() instanceof PolygonalMesh)) {
        return null;
    }
    PolygonalMesh mesh = (PolygonalMesh) getMesh();
    if (!mesh.isTriangular()) {
        return null;
    }
    // Find nearest face to the point. The vertices of this face will be used
    // to find the nodes and weight for the attachment.
    BVFeatureQuery query = new BVFeatureQuery();
    Point3d near = new Point3d();
    Vector2d uv = new Vector2d();
    Face face = query.nearestFaceToPoint(near, uv, mesh, pnt.getPosition());
    Vertex3d[] vtxs = face.getTriVertices();
    double[] wgts = new double[] { 1 - uv.x - uv.y, uv.x, uv.y };
    HashMap<FemNode, Double> nodeWeights = new HashMap<FemNode, Double>();
    for (int i = 0; i < vtxs.length; i++) {
        PointAttachment va = myVertexAttachments.get(vtxs[i].getIndex());
        if (va instanceof PointParticleAttachment) {
            PointParticleAttachment ppa = (PointParticleAttachment) va;
            FemNode node = (FemNode) ppa.getParticle();
            accumulateNodeWeights(node, wgts[i], nodeWeights);
        } else if (va instanceof PointFem3dAttachment) {
            PointFem3dAttachment pfa = (PointFem3dAttachment) va;
            for (int k = 0; k < pfa.numMasters(); k++) {
                FemNode node = pfa.getNodes()[k];
                double w = pfa.getCoordinate(k);
                accumulateNodeWeights(node, w * wgts[i], nodeWeights);
            }
        }
    }
    // Create a new PointFem3dAttachment
    PointFem3dAttachment ax = new PointFem3dAttachment(pnt);
    VectorNd weightVec = new VectorNd();
    for (Double d : nodeWeights.values()) {
        weightVec.append(d);
    }
    ax.setFromNodes(nodeWeights.keySet(), weightVec);
    return ax;
}

Example 47 with Face

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

the class MFreeMeshComp method writeMesh.

public boolean writeMesh(PrintWriter pw, boolean nodeFormat) {
    PolygonalMesh mesh = null;
    if (!(getMesh() instanceof PolygonalMesh)) {
        return false;
    }
    mesh = (PolygonalMesh) getMesh();
    pw.print("[ ");
    NumberFormat fmt = new NumberFormat("%.8g");
    IndentingPrintWriter.addIndentation(pw, 2);
    if (!nodeFormat) {
        for (Vertex3d vtx : mesh.getVertices()) {
            writeVertexInfo(pw, vtx, fmt);
        }
    }
    ArrayList<Integer> nodeNums = new ArrayList<Integer>();
    for (Face face : mesh.getFaces()) {
        HalfEdge he0 = face.firstHalfEdge();
        HalfEdge he = he0;
        pw.print("f");
        do {
            int vidx = he.head.getIndex();
            if (nodeFormat) {
                PointParticleAttachment ppa = (PointParticleAttachment) getAttachment(vidx);
                MFreeNode3d node = (MFreeNode3d) ppa.getParticle();
                pw.print(" " + node.getNumber());
            } else {
                pw.print(" " + (vidx + 1));
            }
            he = he.getNext();
        } while (he != he0);
        pw.println("");
    }
    IndentingPrintWriter.addIndentation(pw, -2);
    pw.println("]");
    return true;
}

Example 48 with Face

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

the class RigidMeshComp method getDistanceGrid.

@Override
public DistanceGrid getDistanceGrid() {
    if (getMesh() instanceof PolygonalMesh) {
        if (mySDGrid == null) {
            List<Face> faces = ((PolygonalMesh) getMesh()).getFaces();
            mySDGrid = new DistanceGrid(faces, myGridMargin, myMaxGridDivisions, /*signed=*/
            true);
        }
    } else {
        mySDGrid = null;
    }
    return mySDGrid;
}

Example 49 with Face

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

the class StlWriter method writeMesh.

public void writeMesh(PolygonalMesh mesh) throws IOException {
    NumberFormat fmt = myFmt;
    PrintWriter pw = new PrintWriter(new BufferedWriter(new OutputStreamWriter(myOstream)));
    String name = mesh.getName();
    if (name == null) {
        name = "";
    }
    pw.println("solid " + name);
    for (Face face : mesh.getFaces()) {
        Vector3d n = face.getNormal();
        if (face.isTriangle()) {
            pw.println("facet normal " + fmt.format((float) n.x) + " " + fmt.format((float) n.y) + " " + fmt.format((float) n.z));
        } else {
            pw.println("facet normal 0 0 0");
        }
        pw.println("  outer loop");
        for (int i = 0; i < face.numVertices(); i++) {
            Point3d pos = face.getVertex(i).getPosition();
            pw.println("    vertex " + fmt.format((float) pos.x) + " " + fmt.format((float) pos.y) + " " + fmt.format((float) pos.z));
        }
        pw.println("  endloop");
        pw.println("endfacet");
    }
    pw.println("endsolid " + name);
    pw.close();
}