Simon Schneegans
10 lines
387 B
GLSL
10 lines
387 B
GLSL
float distToLine(vec2 origin, vec2 direction, vec2 point) {
|
|
vec2 perpendicular = vec2(direction.y, -direction.x);
|
|
return abs(dot(normalize(perpendicular), origin - point));
|
|
}
|
|
|
|
float getWinding(vec2 a, vec2 b) { return cross(vec3(a, 0.0), vec3(b, 0.0)).z; }
|
|
|
|
vec2 rotate(vec2 a, float angle) {
|
|
return vec2(a.x * cos(angle) - a.y * sin(angle), a.x * sin(angle) + a.y * cos(angle));
|
|
} |