24 lines
523 B
Plaintext
24 lines
523 B
Plaintext
|
#version 330
|
||
|
|
in vec2 coords;
|
||
|
|
|
||
|
|
out vec4 color;
|
||
|
|
|
||
|
|
uniform float radius;
|
||
|
|
uniform int thickness;
|
||
|
|
|
||
|
|
void main()
|
||
|
|
{
|
||
|
|
// int tt = thickness + 1;
|
||
|
|
float R1 = 1.f;
|
||
|
|
float R2 = 1.f - (thickness / radius);
|
||
|
|
float dist = sqrt(dot(coords, coords));
|
||
|
|
if (dist <= R2 || dist >= R1)
|
||
|
|
discard;
|
||
|
|
/*
|
||
|
|
float smoother = 0.01f - (radius * 0.00003f);
|
||
|
|
float sm = smoothstep(R1, R1-smoother, dist);
|
||
|
|
float sm2 = smoothstep(R2, R2+smoother, dist);
|
||
|
|
float alpha = sm*sm2;
|
||
|
|
*/
|
||
|
|
color = vec4(0.4f, 0.5f, 0.6f, 1.f);
|
||
|
|
}
|