mdx-m3-viewer
Version:
A browser WebGL model viewer. Mainly focused on models of the games Warcraft 3 and Starcraft 2.
104 lines • 2.7 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.isPowerOfTwo = exports.powerOfTwo = exports.copysign = exports.bezier = exports.hermite = exports.lerp = exports.clamp = exports.randomInRange = exports.radToDeg = exports.degToRad = void 0;
/**
* Convert from degrees to radians.
*/
function degToRad(degrees) {
return degrees * (Math.PI / 180);
}
exports.degToRad = degToRad;
/**
* Convert from radians to degrees.
*/
function radToDeg(radians) {
return radians * (180 / Math.PI);
}
exports.radToDeg = radToDeg;
/**
* Gets a random number between a range.
*/
function randomInRange(a, b) {
return a + Math.random() * (b - a);
}
exports.randomInRange = randomInRange;
/**
* Clamp a number in a range.
*/
function clamp(x, minVal, maxVal) {
return Math.min(Math.max(x, minVal), maxVal);
}
exports.clamp = clamp;
/**
* Linear interpolation.
*/
function lerp(a, b, t) {
return a + t * (b - a);
}
exports.lerp = lerp;
/**
* Hermite interpolation.
*/
function hermite(a, b, c, d, t) {
const factorTimes2 = t * t;
const factor1 = factorTimes2 * (2 * t - 3) + 1;
const factor2 = factorTimes2 * (t - 2) + t;
const factor3 = factorTimes2 * (t - 1);
const factor4 = factorTimes2 * (3 - 2 * t);
return (a * factor1) + (b * factor2) + (c * factor3) + (d * factor4);
}
exports.hermite = hermite;
/**
* Bezier interpolation.
*/
function bezier(a, b, c, d, t) {
const invt = 1 - t;
const factorTimes2 = t * t;
const inverseFactorTimesTwo = invt * invt;
const factor1 = inverseFactorTimesTwo * invt;
const factor2 = 3 * t * inverseFactorTimesTwo;
const factor3 = 3 * factorTimes2 * invt;
const factor4 = factorTimes2 * t;
return (a * factor1) + (b * factor2) + (c * factor3) + (d * factor4);
}
exports.bezier = bezier;
/**
* Copies the sign of one number onto another.
*/
function copysign(x, y) {
const signy = Math.sign(y);
if (signy === 0) {
return 0;
}
const signx = Math.sign(x);
if (signx !== signy) {
return -x;
}
return x;
}
exports.copysign = copysign;
/**
* Gets the closest power of two bigger or equal to the given number.
*/
function powerOfTwo(x) {
x--;
x |= x >> 1;
x |= x >> 2;
x |= x >> 4;
x |= x >> 8;
x |= x >> 16;
x++;
return x;
}
exports.powerOfTwo = powerOfTwo;
/**
* Is this number a power of two?
*/
function isPowerOfTwo(x) {
if (x === 0) {
return false;
}
return ((x & (x - 1)) === 0);
}
exports.isPowerOfTwo = isPowerOfTwo;
//# sourceMappingURL=math.js.map