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44 lines
931 B
GLSL
44 lines
931 B
GLSL
// Author: @patriciogv
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// Title: 4 cells DF
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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 vec2 u_mouse;
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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.xy;
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st.x *= u_resolution.x/u_resolution.y;
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vec3 color = vec3(.0);
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// Cell positions
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vec2 point[5];
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point[0] = vec2(0.83,0.75);
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point[1] = vec2(0.60,0.07);
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point[2] = vec2(0.28,0.64);
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point[3] = vec2(0.31,0.26);
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point[4] = u_mouse/u_resolution;
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float m_dist = 1.; // minimum distance
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// Iterate through the points positions
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for (int i = 0; i < 5; i++) {
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float dist = distance(st, point[i]);
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// Keep the closer distance
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m_dist = min(m_dist, dist);
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}
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// Draw the min distance (distance field)
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color += m_dist;
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// Show isolines
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// color -= step(.7,abs(sin(50.0*m_dist)))*.3;
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gl_FragColor = vec4(color,1.0);
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}
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