/** pack all the triangles into 2D rectangle */
public void packTriangles() {
int rc = getTriCount();
CanonicalTri ct = new CanonicalTri();
m_packer = new RectPacking();
printf("RectPacking start\n");
long t0 = time();
for (int i = 0; i < rc; i++) {
getCanonicalTri(i, ct);
// add triangle with a safety gap around it
// TODO - make proper margin around triangle
// m_packer.addRect(ct.v1x+2*m_gap, ct.v2y + 2*m_gap);
m_packer.addRect(ct.getWidth(), ct.getHeight());
if (false) printf("tri: %d %s\n", i, ct);
}
m_packer.pack();
if (DEBUG) printf("RectPacking done\n");
m_texCoord = new double[6 * m_triCount];
Vector2d origin = new Vector2d();
for (int k = 0; k < m_triCount; k++) {
getCanonicalTri(k, ct);
m_packer.getRectOrigin(k, origin);
// TODO - make proper margin around triangle
// origin.x += m_gap;
// origin.y += m_gap;
int texindex = k * 6;
ct.getTexCoord(origin.x, origin.y, texindex, m_texCoord);
}
// re-build the mesh
IndexedTriangleSetBuilder itsb = new IndexedTriangleSetBuilder();
getTriangles(itsb);
m_triCoord = itsb.getVertices();
m_triIndex = itsb.getFaces();
m_texCoordIndex = new int[m_triCount * 3];
for (int k = 0; k < m_texCoordIndex.length; k++) {
m_texCoordIndex[k] = k;
}
if (DEBUG) printf("packTriangles() done %d ms\n", time() - t0);
}
/** return size of rectangle with given index */
private void getCanonicalTri(int index, CanonicalTri tri) {
tri.set(m_ctri.get(index));
}