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October 7, 2015 01:42
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| import math | |
| node = hou.pwd() | |
| geo = node.geometry() | |
| # Lines Construction | |
| hasInputs = True if len(node.inputs()) > 0 else False | |
| if hasInputs == False: | |
| line1_Pos = [(0,0,0), (1,1,0)] | |
| line1 = geo.createPolygon() | |
| line1.setIsClosed(False) | |
| line2_Pos = [(0,1,0), (1,0,0)] | |
| line2 = geo.createPolygon() | |
| line2.setIsClosed(False) | |
| for p in line1_Pos: | |
| pt = geo.createPoint() | |
| pt.setPosition(p) | |
| line1.addVertex(pt) | |
| for p in line2_Pos: | |
| pt = geo.createPoint() | |
| pt.setPosition(p) | |
| line2.addVertex(pt) | |
| # Intersection Implementation | |
| pts = geo.iterPoints() | |
| p0 = pts[0] | |
| p1 = pts[1] | |
| p2 = pts[2] | |
| p3 = pts[3] | |
| a = p1.position() - p0.position() | |
| b = p3.position() - p2.position() | |
| C = p0.position() | |
| D = p2.position() | |
| e = a | |
| f = b | |
| g = D - C | |
| H = f.cross(g) | |
| K = f.cross(e) | |
| h = H.length() | |
| k = K.length() | |
| a = K.normalized() | |
| b = H.normalized() | |
| d = a.dot(b) | |
| if hou.almostEqual(d, 1.0) or hou.almostEqual(d, -1.0): | |
| l = (h / k) * e * math.copysign(1, d) | |
| i = C + l | |
| p = geo.createPoint() | |
| p.setPosition(i) |
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