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Make clearer the non-grid meshing of the Item

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This commit is contained in:
Etienne Dumur 2020-06-28 15:05:29 +02:00
parent 919ee54b59
commit 98c6c56358
1 changed files with 14 additions and 3 deletions
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17
examples/pColorMeshItem.py
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@ -22,12 +22,23 @@ view = win.addViewBox()
## Create data
# x and y being the coordinates of the polygons, they share the same shape
# To enhance the non-grid meshing, we randomize the polygon vertices per and
# certain amount
randomness = 5
# x and y being the vertices of the polygons, they share the same shape
# However the shape can be different in both dimension
xn = 50 # nb points along x
yn = 40 # nb points along y
x = np.repeat(np.arange(1, xn+1), yn).reshape(xn, yn)
y = np.tile(np.arange(1, yn+1), xn).reshape(xn, yn)
x = np.repeat(np.arange(1, xn+1), yn).reshape(xn, yn)\
+ np.random.random((xn, yn))*randomness
y = np.tile(np.arange(1, yn+1), xn).reshape(xn, yn)\
+ np.random.random((xn, yn))*randomness
x.sort(axis=0)
y.sort(axis=0)
# z being the color of the polygons its shape must be decreased by one in each dimension
z = np.exp(-(x*xn)**2/1000)[:-1,:-1]