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help with cgDrawVectors [message #91191]

Mon, 15 June 2015 08:31

g.nacarts
Messages: 148
Registered: November 2013

Senior Member

Hi

I have an image 216x216. I wanted to overplot on that image the vectors.

Below it's my code

vector_size = fltarr(20,20)
dims_i_need = size(vector_size, /Dimensions)
posx = Rebin(Findgen(dims_i_need[0]), dims_i_need[0], dims_i_need[1])
posy = Rebin(Reform(Findgen(dims_i_need[1]), 1, dims_i_need[1]), dims_i_need[0], dims_i_need[1])

cgDisplay, 100,100
cgimage, image
cgDrawVectors, Vx, Vy, posx, posy, /ORDERED, overplot = 1

The problem is that the vectors are not plotted at the whole image but at a part of the image.
posx and posy are positions arrays. If the image is [216,216] and the vectors have dimensions [20,20] how we can plot this on top of the whole image?

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[Message index]

		help with cgDrawVectors By: g.nacarts on Mon, 15 June 2015 08:31
		Re: help with cgDrawVectors By: David Fanning on Mon, 15 June 2015 17:26
		Re: help with cgDrawVectors By: g.nacarts on Tue, 16 June 2015 08:11
		Re: help with cgDrawVectors By: David Fanning on Tue, 16 June 2015 18:57

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