Created
September 28, 2016 04:16
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A Fragment Shader (Using Patricio Gonzalez Vivo's glslCanvas)
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| <html> | |
| <script type="text/javascript" src="https://rawgit.com/patriciogonzalezvivo/glslCanvas/master/build/GlslCanvas.js"></script> | |
| <body> | |
| <canvas class="glslCanvas" data-fragment=" | |
| #ifdef GL_ES | |
| precision mediump float; | |
| #endif | |
| #define PI 3.14 | |
| uniform vec2 u_resolution; | |
| uniform vec2 u_mouse; | |
| uniform float u_time; | |
| mat2 rot(float theta){ | |
| return mat2(cos(theta), sin(theta), -sin(theta), cos(theta)); | |
| } | |
| mat2 scale(vec2 s){ | |
| return mat2(s.x, 0.0, 0.0, s.y); | |
| } | |
| void main() { | |
| vec2 st = gl_FragCoord.xy/u_resolution.xy; | |
| st.x *= u_resolution.x/u_resolution.y; | |
| st = ( (fract(3.0 * st))*2.-1.); | |
| float d = fract(5.0*distance( st, vec2(0.0))+u_time); | |
| vec3 color = vec3(smoothstep(.6,1.,d),0.,0.); | |
| gl_FragColor = vec4(color,1.0); | |
| } | |
| " | |
| width="800" height="600"> </canvas> | |
| </body> | |
| </html> |
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