URL: http://glslsandbox.com/e#20583.1
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// Energy Sphere // By: Brandon Fogerty // bfogerty at gmail dot com // Special Thanks to ElusivePete // xdpixel.com #ifdef GL_ES precision mediump float; #endif uniform float time; uniform vec2 resolution; vec2 getNewUV( vec2 uv, vec2 pos, float radius, float strength, out float dist) { vec2 fromUVToPoint = pos - uv; dist = length( fromUVToPoint ); float mag = (1.0 - (dist / radius)) * strength; mag *= step( dist, radius ); return uv + (mag * fromUVToPoint); } vec4 proceduralTexture2D( vec2 uv, vec2 resolution ) { vec2 fragCoord = (uv * resolution.x ); vec3 brightColor = vec3( 1.0, 1.0, 1.0 ); vec3 darkColor = vec3( 0.0, 0.0, 0.0 ); vec2 p = floor( (fragCoord.xy / resolution.x) * 10.0 ); float t = mod(p.x + p.y, 2.0) * 10.0; vec3 color = mix( darkColor, brightColor, t); return vec4( color, 1.0 ); } void main( void ) { vec2 uv = (gl_FragCoord.xy / resolution.xy) * 2.0 - 1.0; uv.x *= resolution.x / resolution.y; float radius = 0.50; float ct = cos( time / 3.0 ); float st0 = sin( time / 3.0 ); float st1 = sin( time ); vec2 origin = vec2( 0.0, 0.0 ); float x = origin.x + ( ct * st0) * 2.70; float y = origin.y + ( st1 ) * 0.50; vec2 pos = vec2(x,y); float dist = 0.0; vec2 newUV = getNewUV( uv, pos, radius, 0.5, dist); float start = 0.42; float glowT = sin(time)*0.5 + 0.5; float outlineRadius = radius + (1.0-glowT)*0.01 + (glowT * 0.08); vec4 highlight = vec4( 0.00, 0.00, 0.00, 1.0 ); float t = (outlineRadius - start) / max( (dist - start), 0.01); highlight = mix( vec4( 0.00, 0.00, 0.00, 1.0 ), vec4( 0.00, 0.50, 0.80, 1.0 ), t); vec4 color = proceduralTexture2D( newUV, resolution.xy ) + highlight; color.a = 1.0; gl_FragColor = color; } |