[houdini] _getNURBSInfo_min.py

HOU_getNURBSInfo_min.py

import hou

def _e(expr): return(hou.hscriptExpression(expr))

nodes = hou.selectedNodes()
for n in nodes:
	g = n.geometry()
	if g is None: continue

	pi = 0
	for f in g.prims():
		if f.type().name() != "NURBSSurface":
			continue

		nu = f.numCols()
		nv = f.numRows()
		cu = f.isClosedInU()
		cv = f.isClosedInV()
		degU = _e('degree("%s", %d, D_U)' % (n.path(), pi))
		degV = _e('degree("%s", %d, D_V)' % (n.path(), pi))
		ordU = degU + 1
		ordV = degV + 1

		print "char *srfName = \"%s\";" % n
		print "int numU = %d;" % nu
		print "int numV = %d;" % nv
		print "int ordU = %d;" % ordU
		print "int ordV = %d;" % ordV
		print "int degU = %d;" % degU
		print "int degV = %d;" % degV
		print "int closedU = %d;" % cu
		print "int closedV = %d;" % cv

		nku = nu + ordU + cu * degU
		print "float knotU[%d] = {" % (nku)
		for ki in range(int(nku)):
			if ki > 0: print ",",
			knotU = _e('spknot("%s", %d, %d, D_U)' % (n.path(), pi, ki))
			print "%f" % knotU,
		print "};"
		nkv = nv + ordV + cv * degV
		print "float knotV[%d] = {" % (nkv)
		for ki in range(int(nkv)):
			if ki > 0: print ",",
			knotV = _e('spknot("%s", %d, %d, D_V)' % (n.path(), pi, ki))
			print "%f" % knotV,
		print "};"

		print "vec3 CVs[%d] = {" % (len(f.vertices()));
		for ui in range(nu):
			for vi in range(nv):
				print "\t",
				if ui > 0 or vi > 0: print ",",
				cv = f.vertex(ui, vi)
				po = cv.point()
				p = po.position()
				print "vec3(%f, %f, %f)" % (p[0], p[1], p[2])
		print "};";

		pi += 1