29 lines
1.0 KiB
Python
29 lines
1.0 KiB
Python
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from .GLMeshItem import GLMeshItem
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from ..MeshData import MeshData
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import numpy as np
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class GLBarGraphItem(GLMeshItem):
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def __init__(self, pos, size):
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"""
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pos is (...,3) array of the bar positions (the corner of each bar)
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size is (...,3) array of the sizes of each bar
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"""
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nCubes = reduce(lambda a,b: a*b, pos.shape[:-1])
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cubeVerts = np.mgrid[0:2,0:2,0:2].reshape(3,8).transpose().reshape(1,8,3)
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cubeFaces = np.array([
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[0,1,2], [3,2,1],
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[4,5,6], [7,6,5],
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[0,1,4], [5,4,1],
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[2,3,6], [7,6,3],
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[0,2,4], [6,4,2],
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[1,3,5], [7,5,3]]).reshape(1,12,3)
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size = size.reshape((nCubes, 1, 3))
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pos = pos.reshape((nCubes, 1, 3))
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verts = cubeVerts * size + pos
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faces = cubeFaces + (np.arange(nCubes) * 8).reshape(nCubes,1,1)
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md = MeshData(verts.reshape(nCubes*8,3), faces.reshape(nCubes*12,3))
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GLMeshItem.__init__(self, meshdata=md, shader='shaded', smooth=False)
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