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CRect:PtInside
The PtInside method tests whether a point is interior to the CRect. The tests are made using <= or >= so that a point exactly on a CRect boundary is considered to be inside. The related PtInsideInt method tests the CRect using fuzzy integral boundaries.
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bSuccess = CRect:PtInside( x, y )
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The following script tests whether the point (225,300) is inside the CRect:
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R = CRect:new() |
-- create a CRect object |
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R:Set(200,250,250,500) |
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x = 225 ; y = 300 |
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test = R:PtInside(x,y) |
-- returns test = true or false |
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Printf( "Inside= %d\n", test) |
-- result: Inside = 1 |
The script below tests whether an object intended for photometry is entirely inside the image when the size of the outer background aperture is considered. Assume a CApphot object A and a CImage object I already exist. This script uses the radius of the outer aperture to define a zone to be avoided around the margin of the image. The value is increased by 1 pixel to handle fractional pixels that might otherwise push the edge of the aperture outside the image.
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nBorder = A.nRadius3 + 1 |
-- get the radius of the outer aperture, add 1 pixel |
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R = CRect:new() |
-- create a CRect object |
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R:SetToImage( I ) |
-- give the rectangle the dimension of the image |
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R:Inflate( -nBorder, -nBorder ) |
-- shrink the CRect by (aperture radius + 1) |
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x = 225 ; y = 300 |
-- get some coordinates for the object |
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test = R:PtInside(x,y) |
-- returns test = true or false |
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Printf( "Inside= %d\n", test) |
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where