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ifsrenderer-linux / Transforms / Moebius-strip.ifstf

16 lines · ifstf ref: 
@Name: Möbius-strip
@Version: 1.0
@Reference: https://en.wikipedia.org/wiki/M%C3%B6bius_strip
@Tags: shape

@v_mult: 1

float u = 2.0 * PI * random(next);
float v = -1.0 + 2.0 * random(next);
v *= @v_mult;
float a = 1.0 + v / 2.0 * cos(u / 2.0);
return vec3(
	a * cos(u),
	a * sin(u),
	v / 2.0 * sin(u / 2.0));