Gists
Shader
Shader
An introduction to Shader Art Coding
最简单的 Shader
void mainImage( out vec4 fragColor, in vec2 fragCoord )
{
// Normalized pixel coordinates (from 0 to 1)
vec2 uv = fragCoord / iResolution.xy;
// Output to screen
fragColor = vec4(uv,0,1.0);
}
带抗锯齿边缘的环形
void mainImage( out vec4 fragColor, in vec2 fragCoord )
{
vec2 uv = fragCoord / iResolution.xy * 2.0 - 1.0;
uv.x *= iResolution.x / iResolution.y;
// 分母越大越平滑
float pixelWidth = 5.0 / iResolution.y;
float d = length(uv);
d -= 0.68;
d = abs(d);
d = smoothstep(0.1, 0.1 + pixelWidth, d);
fragColor = vec4(d,0,0,1.0);
}