160 lines
5.1 KiB
Python
160 lines
5.1 KiB
Python
from surf.geometry import Vertex, Edge, Face, Polygon
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def cube():
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"""
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This function returns a populated Polygon object. The object is a cube with
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a vertex at the origin, and another at (1, 1, 1).
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v4 v5
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*-----e8-----*
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e|4 f4 e|5
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v4 v|0 v|1 v5
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*-----e4-----*-----e0-----*-----e5-----*
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e11| f3 e|3 f0 e|1 f1 e|9
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*-----e7-----*-----e2-----*-----e6-----*
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v7 v|3 v|2 v6
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e|7 f2 e|6
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v|7 v|6
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*-----e10----*
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e|11 f5 e|9
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*-----e8-----*
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v4 v5
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v0 - <0,1,0>
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v1 - <1,1,0>
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v2 - <1,0,0>
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v3 - <0,0,0>
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v4 - <0,1,1>
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v5 - <1,1,1>
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v6 - <1,0,1>
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v7 - <0,0,1>
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face list
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f0 - e0, e1, e2, e3
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f1 - e1, e5, e9, e6
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f2 - e2, e6, e10, e7
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f3 - e4, e3, e7, e11
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f4 - e8, e5, e0, e4
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f5 - e10, e9, e8, e11
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winged edges ordered by face, then by vertex reference
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edge list
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e0 - v0, v1; f0, f4; e3, e1, e4, e5
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e1 - v1, v2; f0, f1; e0, e2, e5, e6
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e2 - v3, v2; f0, f2; e3, e7, e1, e6
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e3 - v0, v3; f3, f0; e4, e7, e0, e2
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e4 - v4, v0; f3, f4; e11, e3, e0 e8
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e5 - v5, v1; f4, f1; e8, e0, e9, e1
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e6 - v2, v6; f1, f2; e1, e9, e2, e10
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e7 - v7, v3; f3, f2; e11, e3, e10, e2
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e8 - v4, v5, f4, f5; e4, e5, e11, e9
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e9 - v5, v6; f1, f5; e5, e6, e8, e10
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e10 - v7, v6; f2, f5; e7, e6, e11, e9
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e11 - v4, v7; f3, f5; e4, e7, e8, 10
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vertex list
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v0 - e0, e3, e4
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v1 - e0, e5, e1
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v2 - e1, e6, e2
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v3 - e2, e7, e3
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v4 - e4, e11, e8
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v5 - e5, e9, e8
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v6 - e2, e9, e10
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v7 - e7, e10, e11
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"""
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v = []
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v.append(Vertex(0.0, 1.0, 0.0))
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v.append(Vertex(1.0, 1.0, 0.0))
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v.append(Vertex(1.0, 0.0, 0.0))
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v.append(Vertex(0.0, 0.0, 0.0))
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v.append(Vertex(0.0, 1.0, 1.0))
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v.append(Vertex(1.0, 1.0, 1.0))
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v.append(Vertex(1.0, 0.0, 1.0))
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v.append(Vertex(0.0, 0.0, 1.0))
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e = []
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e.append(Edge())
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e.append(Edge())
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e.append(Edge())
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e.append(Edge())
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e.append(Edge())
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e.append(Edge())
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e.append(Edge())
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e.append(Edge())
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e.append(Edge())
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e.append(Edge())
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e.append(Edge())
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e.append(Edge())
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f = []
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f.append(Face())
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f.append(Face())
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f.append(Face())
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f.append(Face())
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f.append(Face())
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f.append(Face())
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# vertex list
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v[0].edges = [e[0], e[3], e[4]]
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v[1].edges = [e[0], e[5], e[1]]
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v[2].edges = [e[1], e[6], e[2]]
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v[3].edges = [e[2], e[7], e[3]]
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v[4].edges = [e[4], e[11], e[8]]
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v[5].edges = [e[5], e[9], e[8]]
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v[6].edges = [e[6], e[9], e[10]]
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v[7].edges = [e[7], e[10], e[11]]
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# face list
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f[0].edges = [e[0], e[1], e[2], e[3]]
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f[1].edges = [e[1], e[5], e[9], e[6]]
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f[2].edges = [e[2], e[6], e[10], e[7]]
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f[3].edges = [e[4], e[3], e[7], e[11]]
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f[4].edges = [e[8], e[5], e[0], e[4]]
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f[5].edges = [e[10], e[9], e[8], e[11]]
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#winged edges ordered by face, then by vertex reference
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e[0].vertices, e[0].faces, e[0].edges = [v[0], v[1]], [f[0], f[4]], [e[3], e[1], e[4], e[5]]
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e[1].vertices, e[1].faces, e[1].edges = [v[1], v[2]], [f[0], f[1]], [e[0], e[2], e[5], e[6]]
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e[2].vertices, e[2].faces, e[2].edges = [v[2], v[3]], [f[0], f[2]], [e[1], e[3], e[6], e[7]]
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e[3].vertices, e[3].faces, e[3].edges = [v[3], v[0]], [f[3], f[0]], [e[4], e[7], e[0], e[2]]
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e[4].vertices, e[4].faces, e[4].edges = [v[0], v[4]], [f[3], f[4]], [e[11], e[3], e[0], e[8]]
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e[5].vertices, e[5].faces, e[5].edges = [v[5], v[1]], [f[4], f[1]], [e[8], e[0], e[9], e[1]]
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e[6].vertices, e[6].faces, e[6].edges = [v[2], v[6]], [f[1], f[2]], [e[1], e[9], e[2], e[10]]
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e[7].vertices, e[7].faces, e[7].edges = [v[7], v[3]], [f[3], f[2]], [e[11], e[3], e[10], e[2]]
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e[8].vertices, e[8].faces, e[8].edges = [v[4], v[5]], [f[4], f[5]], [e[4], e[5], e[11], e[9]]
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e[9].vertices, e[9].faces, e[9].edges = [v[5], v[6]], [f[1], f[5]], [e[5], e[6], e[8], e[10]]
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e[10].vertices, e[10].faces, e[10].edges = [v[7], v[6]], [f[2], f[5]], [e[7], e[6], e[11], e[9]]
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e[11].vertices, e[11].faces, e[11].edges = [v[4], v[7]], [f[3], f[5]], [e[4], e[7], e[8], e[10]]
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# just to prove to myself that the objects are the same, this is what years of pass by value have done to me...
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# print id(v[0].x)
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# print id(e[0].vertices[0].x)
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# print id(f[0].edges[0].vertices[0].x)
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# v[0].x = 9
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# print id(v[0].x)
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# print id(e[0].vertices[0].x)
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# print id(f[0].edges[0].vertices[0].x)
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# print v[0].x
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# print e[0].vertices[0].x
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# print f[0].edges[0].vertices[0].x
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return Polygon(v, e, f)
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