40 lines
820 B
TypeScript
40 lines
820 B
TypeScript
export type vec3 = [number, number, number];
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export function cross(a: vec3, b: vec3) : vec3 {
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return [
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a[1] * b[2] - a[2] * b[1],
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a[2] * b[0] - a[0] * b[2],
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a[0] * b[1] - a[1] * b[0],
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];
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}
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export function diff(a: vec3, b: vec3) : vec3 {
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return [
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a[0] - b[0],
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a[1] - b[1],
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a[2] - b[2],
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];
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}
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export function add(a: vec3, b: vec3) : vec3 {
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return [
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a[0] + b[0],
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a[1] + b[1],
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a[2] + b[2],
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];
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}
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export function norm(a: vec3) : number {
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return Math.sqrt(a[0] ** 2 + a[1] ** 2 + a[2] ** 2);
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}
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export function dot(a: vec3, b: vec3) : number {
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return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];
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}
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export function scale(a: vec3, s: number) : vec3 {
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return [
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a[0] * s,
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a[1] * s,
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a[2] * s,
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];
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} |