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35 lines
959 B
GLSL
35 lines
959 B
GLSL
// By Peiying Feng
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// For Shader Studio Course https://github.com/patriciogonzalezvivo/ss2015
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#ifdef GL_ES
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precision mediump float;
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#endif
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uniform vec2 u_resolution;
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uniform float u_time;
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void main() {
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vec2 st = gl_FragCoord.xy/u_resolution;
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float pct = 0.0;
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float m = abs(sin(u_time*0.5));
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float n = abs(cos(u_time*0.5))*2.0;
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// 01
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// st = st * 2.0 - 0.8;
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// pct = ceil(distance(st,vec2(0.2))*m) - step(0.2, distance(st, vec2(0.1*m)));
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// gl_FragColor = vec4(vec3(1.0, 1.0*pct, 0.3*pct), 1.0);
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//02
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// st = st * 2.0 - 0.5;
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// pct = exp(distance(st,vec2(0.2)))*m - distance(st, vec2(0.8)) * distance(st, vec2(0.1*m));
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// gl_FragColor = vec4(vec3(0.0, 0.5*pct, pct), 1.0);
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//03
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st.x = st.x * 10.0 - 10.0 * m;
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st.y = st.y * 10.0 - 10.0 * abs(sin(u_time*0.1));
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pct = m*distance(st, vec2(0.5*n))*0.2 / distance(st, vec2(0.2))*2.0;
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gl_FragColor = vec4(vec3(0.0, 0.5*pct, pct), 1.0);
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// How to travel in a circular motion?
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} |