Wow, this is a great resource! I'm still really enjoying all of the discussion of GLSL!
~Kyle
On 7/14/07, cyrille henry cyrille.henry@la-kitchen.fr wrote:
Cypod a écrit :
I found a webpage that has published some code for creating effects with glsl, and I am trying to get them to work in pd http://dem.ocracy.org/libero/photobooth/ There are some other cool effects, eventually it could be a cool patch idea. Do yo need a vert?
no, we don't need a vert
I am trying to plug this into the deform_texture.pd patch. So far this is the frag that I have worked out so far:
ok, here is a corrected version of this patch.
cyrille
uniform sampler2D texture;
void main(void) { vec2 texCoord = (gl_TexCoord[0].st); // [0.0 ,1.0] x [0.0, 1.0] vec2 normCoord = 2.0 * texCoord - 1.0; // [-1.0 ,1.0] x [-1.0, 1.0]
normCoordNew = Effect(normCoord) rNew, phiNew = Effect(r, phi) float r = length(normCoord); // to polar coords float phi = atan(normCoord.y, normCoord.x); // to polar coords r = pow(r, 1.0/1.8) * 0.8 normCoord.x = r * cos(phi); normCoord.y = r * sin(phi); texCoord = normCoord / 2.0 + 0.5; // [0.0 ,1.0] x [0.0, 1.0] color = texture2D(sampler, texCoord); gl_FragColor = color;}
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