OpenSubdiv/examples/python/interactive.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

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from PyQt4 import QtGui, QtCore
from window import Window
from renderer import Renderer
import sys
import numpy as np
import osd
import utility

from time import time
import math

def interactive():

    app = QtGui.QApplication(sys.argv)
    renderer = Renderer()
    win = Window(renderer)
    win.raise_()

    cage = [ 0.0, -1.414214, 1.0,  # 0
             1.414214, 0.0, 1.0,   # 1
             -1.414214, 0.0, 1.0,  # 2
             0.0, 1.414214, 1.0,   # 3
             -1.414214, 0.0, -1.0, # 4
             0.0, 1.414214, -1.0,  # 5
             0.0, -1.414214, -1.0, # 6
             1.414214, 0.0, -1.0 ] # 7
    
    cage = np.array(cage, np.float32).reshape((-1, 3))

    faces = [ (0,1,3,2),  # 0
              (2,3,5,4),  # 1
              (4,5,7,6),  # 2
              (6,7,1,0),  # 3
              (1,7,5,3),  # 4
              (6,0,2,4) ] # 5

    topo = osd.Topology(faces)

    dtype = [('x', np.float32),
             ('y', np.float32),
             ('z', np.float32)]

    def updateTopo(numLevels = 4):
        global subdivider
        topo.reset()
        topo.finalize()
        subdivider = osd.Subdivider(
            topo,
            vertexLayout = dtype,
            indexType = np.uint32,
            levels = numLevels)
        quads = subdivider.getRefinedQuads()
        renderer.updateIndicesVbo(quads)

    def updateCoarseVertices():
        global subdivider
        subdivider.setCoarseVertices(cage)
        subdivider.refine()
        pts = subdivider.getRefinedVertices()
        renderer.updatePointsVbo(pts)

    updateTopo()
    updateCoarseVertices()

    renderer.drawHook = updateCoarseVertices

    # Start an interactive session
    import code
    from time import time
    timer = QtCore.QTimer()
    code.interact(local=dict(globals(), **locals()))

    sys.exit(0)

if __name__ == '__main__':
    interactive()