Use this:
kernel vec4 alternateLines(sampler image)
{
vec2 xy = samplerCoord(image);
xy.x = (mod(xy.y, 2.0) < 1.0) ?
xy.x :
samplerSize(image).x - xy.x;
return sample(image, xy);
}Don't use == with floating point numbers (esp. when they're potentially hardware accelerated floats outside of CL's more strict behavior domain).
-- [ christopher wright ] [email protected] http://kineme.net/
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