marius schebella a écrit :
cyrille henry wrote:yes. i faild to render in a framebuffer and using it as a texture for next rendered frame (just like in my wawe exemple).i think this should be more efficient than using pix_snap2tex. if someone know how to do this...maybe with pix_write_buffer, pix_read_buffer?
i want to use shader, so i don't think it will work.
don't have time to do more testing right now. what is the wawe exemple?
it's a phisical modeling wave exemple here it is. cyrille
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wave.pd
Description: application/extension-pd
void main()
{
gl_TexCoord[0] = gl_MultiTexCoord0;
gl_Position = ftransform();
}
uniform float K1,K3,D1;
uniform sampler2D texture;
const float dx = 1./1024.;
const float dy = 1./1024.;
void main (void)
{
float x,y;
vec4 C;
vec2 texture1 = gl_TexCoord[0].st ;
x=texture1.x;
y=texture1.y;
C = texture2D(texture, vec2(x, y));
vec4 color_cote = texture2D(texture, vec2(x-dx, y-dy));
color_cote += texture2D(texture, vec2(x+dx, y-dy));
color_cote += texture2D(texture, vec2(x-dx, y+dy));
color_cote += texture2D(texture, vec2(x+dx, y+dy));
color_cote += texture2D(texture, vec2(x, y-dy));
color_cote += texture2D(texture, vec2(x-dx, y));
color_cote += texture2D(texture, vec2(x+dx, y));
color_cote += texture2D(texture, vec2(x, y+dy));
float K = K1 * color_cote.r + K3 * 0.5 - (8. * K1 + K3) * C.r;
float D = D1 * (C.r - C.g);
C.b = C.g;
C.g = C.r;
C.r = (2.* C.g) - C.b + K - D ;
gl_FragColor = vec4(C.rgb,1.);
}
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