【GLSL】マウスに添って広がる円
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precision mediump float; uniform float u_time; uniform vec2 u_mouse; uniform vec2 u_resolution; void main(void) { float d = distance(gl_FragCoord.xy, u_resolution.xy / 2.); float v = step(distance(u_mouse, u_resolution.xy / 2.), d); gl_FragColor = vec4(vec3(v), 1.); }