playcanvas
Version:
PlayCanvas WebGL game engine
209 lines (206 loc) • 4.52 kB
JavaScript
import { Vec3 } from './vec3.js';
class Mat3 {
clone() {
var cstr = this.constructor;
return new cstr().copy(this);
}
copy(rhs) {
var src = rhs.data;
var dst = this.data;
dst[0] = src[0];
dst[1] = src[1];
dst[2] = src[2];
dst[3] = src[3];
dst[4] = src[4];
dst[5] = src[5];
dst[6] = src[6];
dst[7] = src[7];
dst[8] = src[8];
return this;
}
set(src) {
var dst = this.data;
dst[0] = src[0];
dst[1] = src[1];
dst[2] = src[2];
dst[3] = src[3];
dst[4] = src[4];
dst[5] = src[5];
dst[6] = src[6];
dst[7] = src[7];
dst[8] = src[8];
return this;
}
getX(x) {
if (x === void 0) x = new Vec3();
return x.set(this.data[0], this.data[1], this.data[2]);
}
getY(y) {
if (y === void 0) y = new Vec3();
return y.set(this.data[3], this.data[4], this.data[5]);
}
getZ(z) {
if (z === void 0) z = new Vec3();
return z.set(this.data[6], this.data[7], this.data[8]);
}
equals(rhs) {
var l = this.data;
var r = rhs.data;
return l[0] === r[0] && l[1] === r[1] && l[2] === r[2] && l[3] === r[3] && l[4] === r[4] && l[5] === r[5] && l[6] === r[6] && l[7] === r[7] && l[8] === r[8];
}
isIdentity() {
var m = this.data;
return m[0] === 1 && m[1] === 0 && m[2] === 0 && m[3] === 0 && m[4] === 1 && m[5] === 0 && m[6] === 0 && m[7] === 0 && m[8] === 1;
}
setIdentity() {
var m = this.data;
m[0] = 1;
m[1] = 0;
m[2] = 0;
m[3] = 0;
m[4] = 1;
m[5] = 0;
m[6] = 0;
m[7] = 0;
m[8] = 1;
return this;
}
toString() {
return "[" + this.data.join(', ') + "]";
}
transpose(src) {
if (src === void 0) src = this;
var s = src.data;
var t = this.data;
if (s === t) {
var tmp;
tmp = s[1];
t[1] = s[3];
t[3] = tmp;
tmp = s[2];
t[2] = s[6];
t[6] = tmp;
tmp = s[5];
t[5] = s[7];
t[7] = tmp;
} else {
t[0] = s[0];
t[1] = s[3];
t[2] = s[6];
t[3] = s[1];
t[4] = s[4];
t[5] = s[7];
t[6] = s[2];
t[7] = s[5];
t[8] = s[8];
}
return this;
}
setFromMat4(m) {
var src = m.data;
var dst = this.data;
dst[0] = src[0];
dst[1] = src[1];
dst[2] = src[2];
dst[3] = src[4];
dst[4] = src[5];
dst[5] = src[6];
dst[6] = src[8];
dst[7] = src[9];
dst[8] = src[10];
return this;
}
setFromQuat(r) {
var qx = r.x;
var qy = r.y;
var qz = r.z;
var qw = r.w;
var x2 = qx + qx;
var y2 = qy + qy;
var z2 = qz + qz;
var xx = qx * x2;
var xy = qx * y2;
var xz = qx * z2;
var yy = qy * y2;
var yz = qy * z2;
var zz = qz * z2;
var wx = qw * x2;
var wy = qw * y2;
var wz = qw * z2;
var m = this.data;
m[0] = 1 - (yy + zz);
m[1] = xy + wz;
m[2] = xz - wy;
m[3] = xy - wz;
m[4] = 1 - (xx + zz);
m[5] = yz + wx;
m[6] = xz + wy;
m[7] = yz - wx;
m[8] = 1 - (xx + yy);
return this;
}
invertMat4(src) {
var s = src.data;
var a0 = s[0];
var a1 = s[1];
var a2 = s[2];
var a4 = s[4];
var a5 = s[5];
var a6 = s[6];
var a8 = s[8];
var a9 = s[9];
var a10 = s[10];
var b11 = a10 * a5 - a6 * a9;
var b21 = -a10 * a1 + a2 * a9;
var b31 = a6 * a1 - a2 * a5;
var b12 = -a10 * a4 + a6 * a8;
var b22 = a10 * a0 - a2 * a8;
var b32 = -a6 * a0 + a2 * a4;
var b13 = a9 * a4 - a5 * a8;
var b23 = -a9 * a0 + a1 * a8;
var b33 = a5 * a0 - a1 * a4;
var det = a0 * b11 + a1 * b12 + a2 * b13;
if (det === 0) {
this.setIdentity();
} else {
var invDet = 1 / det;
var t = this.data;
t[0] = b11 * invDet;
t[1] = b21 * invDet;
t[2] = b31 * invDet;
t[3] = b12 * invDet;
t[4] = b22 * invDet;
t[5] = b32 * invDet;
t[6] = b13 * invDet;
t[7] = b23 * invDet;
t[8] = b33 * invDet;
}
return this;
}
transformVector(vec, res) {
if (res === void 0) res = new Vec3();
var m = this.data;
var { x, y, z } = vec;
res.x = x * m[0] + y * m[3] + z * m[6];
res.y = x * m[1] + y * m[4] + z * m[7];
res.z = x * m[2] + y * m[5] + z * m[8];
return res;
}
constructor(){
this.data = new Float32Array(9);
this.data[0] = this.data[4] = this.data[8] = 1;
}
}
Mat3.IDENTITY = Object.freeze(new Mat3());
Mat3.ZERO = Object.freeze(new Mat3().set([
0,
0,
0,
0,
0,
0,
0,
0,
0
]));
export { Mat3 };