Question
Poor OpenGL performance
I've run a simple graphical program with Mono and OpenTK. It contains a simple fragment shader (demo). One frame renders about 7 seconds and CPU usage is 100%. Is it normal?
vec2 p = ( gl_FragCoord.xy / resolution.xy ) - 0.5;
float sx = (amp)*1.9 * sin( 4.0 * (freq) * (p.x-phase) - 6.0 * (speed)*time);
float dy = 43./ ( 60. * abs(4.9*p.y - sx - 1.2));
dy += 1./ (60. * length(p - vec2(p.x, 0.)));
gl_FragColor = vec4( (p.x + 0.05) * dy, 0.2 * dy, dy, 2.0 );