Hi There,
I have a set of primitives (segments) that I would like to overlay with distorted (barrel/pincushion) video feed. I have a good model for the distortion of the primitive (real x,y to pixel x,y) and I would like to apply that distortion to the primitives.
Is there a mapping/perspective/transformation function that I can use to simulate the camera distortion? Ideally it would use antialiasing.
Thanks in advance,
Javier
huh?
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Sig: http://glhlib.sourceforge.net
an open source GLU replacement library. Much more modern than GLU.
float matrix[16], inverse_matrix[16];
glhLoadIdentityf2(matrix);
glhTranslatef2(matrix, 0.0, 0.0, 5.0);
glhRotateAboutXf2(matrix, angleInRadians);
glhScalef2(matrix, 1.0, 1.0, -1.0);
glhQuickInvertMatrixf2(matrix, inverse_matrix);
glUniformMatrix4fv(uniformLocation1, 1, FALSE, matrix);
glUniformMatrix4fv(uniformLocation2, 1, FALSE, inverse_matrix);
Something like that ?
http://opencv.willowgarage.com/docum...struction.html
The easiest way is painting a quad with the texture, and apply your distortion calculation within the fragment shader. Because barrel distortion is not linear (it usually has spherical and tangential factors), finding a projection matrix is impossible (as far I know)
Another option, if you dont have shaders available, is to generate a more or less dense mesh, distort the vertices, and then paint the image over it, without modifying the uv's
"I don't know... with a casual fly"
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