31 lines
525 B
TypeScript
31 lines
525 B
TypeScript
export type Vec = { x: number; y: number };
|
|
|
|
/** Build a vector from two numbers. */
|
|
export function vec(x: number, y: number): Vec {
|
|
return { x, y };
|
|
}
|
|
|
|
/** a + b (component-wise) */
|
|
export function add(a: Vec, b: Vec): Vec {
|
|
return {
|
|
x: a.x + b.x,
|
|
y: a.y + b.y,
|
|
};
|
|
}
|
|
|
|
/** a - b (component-wise) */
|
|
export function sub(a: Vec, b: Vec): Vec {
|
|
return {
|
|
x: a.x - b.x,
|
|
y: a.y - b.y,
|
|
};
|
|
}
|
|
|
|
/** a scaled by the scalar s */
|
|
export function scale(a: Vec, s: number): Vec {
|
|
return {
|
|
x: a.x * s,
|
|
y: a.y * s,
|
|
};
|
|
}
|