diff options
Diffstat (limited to 'examples/snail.frag')
| -rw-r--r-- | examples/snail.frag | 34 |
1 files changed, 17 insertions, 17 deletions
diff --git a/examples/snail.frag b/examples/snail.frag index 491c53a..5513d34 100644 --- a/examples/snail.frag +++ b/examples/snail.frag @@ -8,34 +8,34 @@ uniform float time; const float sharpness = 300; mat2 rot(float a) { - return mat2( - cos(a), -sin(a), - sin(a), cos(a) - ); + return mat2( + cos(a), -sin(a), + sin(a), cos(a) + ); } float circle(vec2 m, float r, vec2 p) { - vec2 diff = m - p; - float d = sqrt(dot(diff, diff)); + vec2 diff = m - p; + float d = sqrt(dot(diff, diff)); - return clamp((r - d)*sharpness, 0.0, 1.0); + return clamp((r - d)*sharpness, 0.0, 1.0); } float circle_d(vec2 m, float r, vec2 p) { - return circle(m, r, p) - circle(m, r - 1/sharpness, p); + return circle(m, r, p) - circle(m, r - 1/sharpness, p); } void main(void) { - vec2 m = res/2; - float s = min(m.x, m.y); - vec2 p = (gl_FragCoord.xy - m) / s; + vec2 m = res/2; + float s = min(m.x, m.y); + vec2 p = (gl_FragCoord.xy - m) / s; - float scene = 0; + float scene = 0; - for (int i = 1; i <= 50; i++) { - float c = circle_d(vec2(0.5, 0) * rot(time/500/i), 0.1 + 0.005*i, p); - scene = abs(scene - c); - } + for (int i = 1; i <= 50; i++) { + float c = circle_d(vec2(0.5, 0) * rot(time/500/i), 0.1 + 0.005*i, p); + scene = abs(scene - c); + } - fragColor = vec4(vec3(1, 1, 1) * scene, 1); + fragColor = vec4(vec3(1, 1, 1) * scene, 1); } |