55 lines
1.5 KiB
Python
55 lines
1.5 KiB
Python
# -*- coding: utf-8 -*-
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"""
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Use GLImageItem to display image data on rectangular planes.
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In this example, the image data is sampled from a volume and the image planes
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placed as if they slice through the volume.
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"""
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## Add path to library (just for examples; you do not need this)
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import initExample
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from pyqtgraph.Qt import QtCore, QtGui
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import pyqtgraph.opengl as gl
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import pyqtgraph as pg
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import numpy as np
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app = pg.mkQApp("GLImageItem Example")
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w = gl.GLViewWidget()
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w.show()
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w.setWindowTitle('pyqtgraph example: GLImageItem')
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w.setCameraPosition(distance=200)
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## create volume data set to slice three images from
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shape = (100,100,70)
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data = pg.gaussianFilter(np.random.normal(size=shape), (4,4,4))
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data += pg.gaussianFilter(np.random.normal(size=shape), (15,15,15))*15
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## slice out three planes, convert to RGBA for OpenGL texture
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levels = (-0.08, 0.08)
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tex1 = pg.makeRGBA(data[shape[0]//2], levels=levels)[0] # yz plane
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tex2 = pg.makeRGBA(data[:,shape[1]//2], levels=levels)[0] # xz plane
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tex3 = pg.makeRGBA(data[:,:,shape[2]//2], levels=levels)[0] # xy plane
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#tex1[:,:,3] = 128
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#tex2[:,:,3] = 128
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#tex3[:,:,3] = 128
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## Create three image items from textures, add to view
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v1 = gl.GLImageItem(tex1)
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v1.translate(-shape[1]/2, -shape[2]/2, 0)
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v1.rotate(90, 0,0,1)
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v1.rotate(-90, 0,1,0)
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w.addItem(v1)
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v2 = gl.GLImageItem(tex2)
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v2.translate(-shape[0]/2, -shape[2]/2, 0)
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v2.rotate(-90, 1,0,0)
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w.addItem(v2)
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v3 = gl.GLImageItem(tex3)
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v3.translate(-shape[0]/2, -shape[1]/2, 0)
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w.addItem(v3)
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ax = gl.GLAxisItem()
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w.addItem(ax)
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if __name__ == '__main__':
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pg.exec()
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