122 lines
3.0 KiB
Python
122 lines
3.0 KiB
Python
# -*- coding: utf-8 -*-
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"""
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Simple examples demonstrating the use of GLMeshItem.
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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 as pg
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import pyqtgraph.opengl as gl
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app = pg.mkQApp("GLMeshItem Example")
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w = gl.GLViewWidget()
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w.show()
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w.setWindowTitle('pyqtgraph example: GLMeshItem')
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w.setCameraPosition(distance=40)
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g = gl.GLGridItem()
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g.scale(2,2,1)
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w.addItem(g)
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import numpy as np
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## Example 1:
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## Array of vertex positions and array of vertex indexes defining faces
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## Colors are specified per-face
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verts = np.array([
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[0, 0, 0],
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[2, 0, 0],
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[1, 2, 0],
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[1, 1, 1],
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])
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faces = np.array([
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[0, 1, 2],
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[0, 1, 3],
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[0, 2, 3],
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[1, 2, 3]
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])
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colors = np.array([
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[1, 0, 0, 0.3],
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[0, 1, 0, 0.3],
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[0, 0, 1, 0.3],
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[1, 1, 0, 0.3]
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])
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## Mesh item will automatically compute face normals.
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m1 = gl.GLMeshItem(vertexes=verts, faces=faces, faceColors=colors, smooth=False)
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m1.translate(5, 5, 0)
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m1.setGLOptions('additive')
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w.addItem(m1)
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## Example 2:
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## Array of vertex positions, three per face
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verts = np.empty((36, 3, 3), dtype=np.float32)
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theta = np.linspace(0, 2*np.pi, 37)[:-1]
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verts[:,0] = np.vstack([2*np.cos(theta), 2*np.sin(theta), [0]*36]).T
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verts[:,1] = np.vstack([4*np.cos(theta+0.2), 4*np.sin(theta+0.2), [-1]*36]).T
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verts[:,2] = np.vstack([4*np.cos(theta-0.2), 4*np.sin(theta-0.2), [1]*36]).T
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## Colors are specified per-vertex
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colors = np.random.random(size=(verts.shape[0], 3, 4))
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m2 = gl.GLMeshItem(vertexes=verts, vertexColors=colors, smooth=False, shader='balloon',
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drawEdges=True, edgeColor=(1, 1, 0, 1))
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m2.translate(-5, 5, 0)
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w.addItem(m2)
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## Example 3:
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## sphere
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md = gl.MeshData.sphere(rows=10, cols=20)
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#colors = np.random.random(size=(md.faceCount(), 4))
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#colors[:,3] = 0.3
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#colors[100:] = 0.0
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colors = np.ones((md.faceCount(), 4), dtype=float)
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colors[::2,0] = 0
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colors[:,1] = np.linspace(0, 1, colors.shape[0])
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md.setFaceColors(colors)
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m3 = gl.GLMeshItem(meshdata=md, smooth=False)#, shader='balloon')
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m3.translate(5, -5, 0)
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w.addItem(m3)
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# Example 4:
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# wireframe
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md = gl.MeshData.sphere(rows=4, cols=8)
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m4 = gl.GLMeshItem(meshdata=md, smooth=False, drawFaces=False, drawEdges=True, edgeColor=(1,1,1,1))
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m4.translate(0,10,0)
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w.addItem(m4)
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# Example 5:
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# cylinder
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md = gl.MeshData.cylinder(rows=10, cols=20, radius=[1., 2.0], length=5.)
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md2 = gl.MeshData.cylinder(rows=10, cols=20, radius=[2., 0.5], length=10.)
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colors = np.ones((md.faceCount(), 4), dtype=float)
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colors[::2,0] = 0
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colors[:,1] = np.linspace(0, 1, colors.shape[0])
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md.setFaceColors(colors)
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m5 = gl.GLMeshItem(meshdata=md, smooth=True, drawEdges=True, edgeColor=(1,0,0,1), shader='balloon')
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colors = np.ones((md.faceCount(), 4), dtype=float)
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colors[::2,0] = 0
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colors[:,1] = np.linspace(0, 1, colors.shape[0])
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md2.setFaceColors(colors)
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m6 = gl.GLMeshItem(meshdata=md2, smooth=True, drawEdges=False, shader='balloon')
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m6.translate(0,0,7.5)
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m6.rotate(0., 0, 1, 1)
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#m5.translate(-3,3,0)
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w.addItem(m5)
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w.addItem(m6)
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if __name__ == '__main__':
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pg.exec()
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