Пример #1
0
  protected void makeTessellatedLocations(
      Globe globe, int subdivisions, List<LatLon> locations, List<LatLon> tessellatedLocations) {
    ArrayList<Vec4> points = new ArrayList<Vec4>();
    for (LatLon ll : locations) {
      points.add(globe.computePointFromLocation(ll));
    }

    //noinspection StringEquality
    if (WWMath.computeWindingOrderOfLocations(locations) != AVKey.COUNTER_CLOCKWISE)
      Collections.reverse(locations);

    Vec4 centerPoint = Vec4.computeAveragePoint(points);
    Vec4 surfaceNormal = globe.computeSurfaceNormalAtPoint(centerPoint);

    int numPoints = points.size();
    float[] coords = new float[3 * numPoints];
    for (int i = 0; i < numPoints; i++) {
      points.get(i).toFloatArray(coords, 3 * i, 3);
    }

    GeometryBuilder gb = new GeometryBuilder();
    GeometryBuilder.IndexedTriangleArray tessellatedPoints =
        gb.tessellatePolygon(0, numPoints, coords, surfaceNormal);

    for (int i = 0; i < subdivisions; i++) {
      gb.subdivideIndexedTriangleArray(tessellatedPoints);
    }

    for (int i = 0; i < tessellatedPoints.getVertexCount(); i++) {
      Vec4 v = Vec4.fromFloatArray(tessellatedPoints.getVertices(), 3 * i, 3);
      tessellatedLocations.add(globe.computePositionFromPoint(v));
    }
  }
Пример #2
0
  private void makeCap(
      DrawContext dc,
      GeometryBuilder.IndexedTriangleArray ita,
      double altitude,
      boolean terrainConformant,
      int orientation,
      Matrix locationTransform,
      Vec4 referenceCenter,
      int indexPos,
      int[] indices,
      int vertexPos,
      float[] vertices,
      float[] normals) {
    GeometryBuilder gb = this.getGeometryBuilder();
    Globe globe = dc.getGlobe();

    int indexCount = ita.getIndexCount();
    int vertexCount = ita.getVertexCount();
    int[] locationIndices = ita.getIndices();
    float[] locationVerts = ita.getVertices();

    this.copyIndexArray(
        indexCount,
        (orientation == GeometryBuilder.INSIDE),
        locationIndices,
        vertexPos,
        indexPos,
        indices);

    for (int i = 0; i < vertexCount; i++) {
      int index = 3 * i;
      Vec4 vec = new Vec4(locationVerts[index], locationVerts[index + 1], locationVerts[index + 2]);
      vec = vec.transformBy4(locationTransform);

      Position pos = globe.computePositionFromPoint(vec);
      vec =
          this.computePointFromPosition(
              dc, pos.getLatitude(), pos.getLongitude(), altitude, terrainConformant);

      index = 3 * (vertexPos + i);
      vertices[index] = (float) (vec.x - referenceCenter.x);
      vertices[index + 1] = (float) (vec.y - referenceCenter.y);
      vertices[index + 2] = (float) (vec.z - referenceCenter.z);
    }

    gb.makeIndexedTriangleArrayNormals(
        indexPos, indexCount, indices, vertexPos, vertexCount, vertices, normals);
  }