84 lines
1.7 KiB
JavaScript
84 lines
1.7 KiB
JavaScript
import { vec3 } from 'gl-matrix'
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export function randomInt (min, max) {
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return Math.floor(Math.random() * (max - min + 1) + min)
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}
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export function clamp (num, min, max) {
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return Math.min(Math.max(num, min), max)
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}
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export function dim3to1 (x, y, z, xMax, yMax) {
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if (xMax && !yMax) yMax = xMax
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return (z * xMax * yMax) + (y * xMax) + x
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}
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export function dim1to3 (idx, xMax, yMax) {
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if (xMax && !yMax) yMax = xMax
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const z = idx / (yMax * xMax)
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idx -= (z * xMax * yMax)
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const y = idx / xMax
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const x = idx % xMax
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return { x, y, z }
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}
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export function addv3 (one, two) {
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if (one.length !== 3) return null
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if (typeof two !== 'object') {
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return [
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one[0] + two, one[1] + two, one[2] + two
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]
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}
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return [
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one[0] + two[0], one[1] + two[1], one[2] + two[2]
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]
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}
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export function subv3 (one, two) {
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if (one.length !== 3) return null
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if (typeof two !== 'object') {
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return [
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one[0] - two, one[1] - two, one[2] - two
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]
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}
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return [
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one[0] - two[0], one[1] - two[1], one[2] - two[2]
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]
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}
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export function mulv3 (one, two) {
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if (one.length !== 3) return null
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if (typeof two !== 'object') {
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return [
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one[0] * two, one[1] * two, one[2] * two
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]
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}
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return [
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one[0] * two[0], one[1] * two[1], one[2] * two[2]
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]
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}
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export function divv3 (one, two) {
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if (one.length !== 3) return null
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if (typeof two !== 'object') {
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return [
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one[0] / two, one[1] / two, one[2] / two
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]
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}
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return [
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one[0] / two[0], one[1] / two[1], one[2] / two[2]
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]
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}
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export function normalv3 (vec) {
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const res = []
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vec3.normalize(res, vec)
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return res
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}
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export function crossv3 (vec1, vec2) {
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const res = []
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vec3.cross(res, vec1, vec2)
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return res
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}
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