mirror of
https://gitee.com/onvia/ccc-tnt-psd2ui
synced 2024-12-26 19:58:25 +00:00
621 lines
18 KiB
JavaScript
621 lines
18 KiB
JavaScript
'use strict'
|
|
|
|
const util = require('util')
|
|
|
|
// DOMMatrix per https://drafts.fxtf.org/geometry/#DOMMatrix
|
|
|
|
class DOMPoint {
|
|
constructor (x, y, z, w) {
|
|
if (typeof x === 'object' && x !== null) {
|
|
w = x.w
|
|
z = x.z
|
|
y = x.y
|
|
x = x.x
|
|
}
|
|
this.x = typeof x === 'number' ? x : 0
|
|
this.y = typeof y === 'number' ? y : 0
|
|
this.z = typeof z === 'number' ? z : 0
|
|
this.w = typeof w === 'number' ? w : 1
|
|
}
|
|
}
|
|
|
|
// Constants to index into _values (col-major)
|
|
const M11 = 0; const M12 = 1; const M13 = 2; const M14 = 3
|
|
const M21 = 4; const M22 = 5; const M23 = 6; const M24 = 7
|
|
const M31 = 8; const M32 = 9; const M33 = 10; const M34 = 11
|
|
const M41 = 12; const M42 = 13; const M43 = 14; const M44 = 15
|
|
|
|
const DEGREE_PER_RAD = 180 / Math.PI
|
|
const RAD_PER_DEGREE = Math.PI / 180
|
|
|
|
function parseMatrix (init) {
|
|
let parsed = init.replace('matrix(', '')
|
|
parsed = parsed.split(',', 7) // 6 + 1 to handle too many params
|
|
if (parsed.length !== 6) throw new Error(`Failed to parse ${init}`)
|
|
parsed = parsed.map(parseFloat)
|
|
return [
|
|
parsed[0], parsed[1], 0, 0,
|
|
parsed[2], parsed[3], 0, 0,
|
|
0, 0, 1, 0,
|
|
parsed[4], parsed[5], 0, 1
|
|
]
|
|
}
|
|
|
|
function parseMatrix3d (init) {
|
|
let parsed = init.replace('matrix3d(', '')
|
|
parsed = parsed.split(',', 17) // 16 + 1 to handle too many params
|
|
if (parsed.length !== 16) throw new Error(`Failed to parse ${init}`)
|
|
return parsed.map(parseFloat)
|
|
}
|
|
|
|
function parseTransform (tform) {
|
|
const type = tform.split('(', 1)[0]
|
|
switch (type) {
|
|
case 'matrix':
|
|
return parseMatrix(tform)
|
|
case 'matrix3d':
|
|
return parseMatrix3d(tform)
|
|
// TODO This is supposed to support any CSS transform value.
|
|
default:
|
|
throw new Error(`${type} parsing not implemented`)
|
|
}
|
|
}
|
|
|
|
class DOMMatrix {
|
|
constructor (init) {
|
|
this._is2D = true
|
|
this._values = new Float64Array([
|
|
1, 0, 0, 0,
|
|
0, 1, 0, 0,
|
|
0, 0, 1, 0,
|
|
0, 0, 0, 1
|
|
])
|
|
|
|
let i
|
|
|
|
if (typeof init === 'string') { // parse CSS transformList
|
|
if (init === '') return // default identity matrix
|
|
const tforms = init.split(/\)\s+/, 20).map(parseTransform)
|
|
if (tforms.length === 0) return
|
|
init = tforms[0]
|
|
for (i = 1; i < tforms.length; i++) init = multiply(tforms[i], init)
|
|
}
|
|
|
|
i = 0
|
|
if (init && init.length === 6) {
|
|
setNumber2D(this, M11, init[i++])
|
|
setNumber2D(this, M12, init[i++])
|
|
setNumber2D(this, M21, init[i++])
|
|
setNumber2D(this, M22, init[i++])
|
|
setNumber2D(this, M41, init[i++])
|
|
setNumber2D(this, M42, init[i++])
|
|
} else if (init && init.length === 16) {
|
|
setNumber2D(this, M11, init[i++])
|
|
setNumber2D(this, M12, init[i++])
|
|
setNumber3D(this, M13, init[i++])
|
|
setNumber3D(this, M14, init[i++])
|
|
setNumber2D(this, M21, init[i++])
|
|
setNumber2D(this, M22, init[i++])
|
|
setNumber3D(this, M23, init[i++])
|
|
setNumber3D(this, M24, init[i++])
|
|
setNumber3D(this, M31, init[i++])
|
|
setNumber3D(this, M32, init[i++])
|
|
setNumber3D(this, M33, init[i++])
|
|
setNumber3D(this, M34, init[i++])
|
|
setNumber2D(this, M41, init[i++])
|
|
setNumber2D(this, M42, init[i++])
|
|
setNumber3D(this, M43, init[i++])
|
|
setNumber3D(this, M44, init[i])
|
|
} else if (init !== undefined) {
|
|
throw new TypeError('Expected string or array.')
|
|
}
|
|
}
|
|
|
|
toString () {
|
|
return this.is2D
|
|
? `matrix(${this.a}, ${this.b}, ${this.c}, ${this.d}, ${this.e}, ${this.f})`
|
|
: `matrix3d(${this._values.join(', ')})`
|
|
}
|
|
|
|
multiply (other) {
|
|
return newInstance(this._values).multiplySelf(other)
|
|
}
|
|
|
|
multiplySelf (other) {
|
|
this._values = multiply(other._values, this._values)
|
|
if (!other.is2D) this._is2D = false
|
|
return this
|
|
}
|
|
|
|
preMultiplySelf (other) {
|
|
this._values = multiply(this._values, other._values)
|
|
if (!other.is2D) this._is2D = false
|
|
return this
|
|
}
|
|
|
|
translate (tx, ty, tz) {
|
|
return newInstance(this._values).translateSelf(tx, ty, tz)
|
|
}
|
|
|
|
translateSelf (tx, ty, tz) {
|
|
if (typeof tx !== 'number') tx = 0
|
|
if (typeof ty !== 'number') ty = 0
|
|
if (typeof tz !== 'number') tz = 0
|
|
this._values = multiply([
|
|
1, 0, 0, 0,
|
|
0, 1, 0, 0,
|
|
0, 0, 1, 0,
|
|
tx, ty, tz, 1
|
|
], this._values)
|
|
if (tz !== 0) this._is2D = false
|
|
return this
|
|
}
|
|
|
|
scale (scaleX, scaleY, scaleZ, originX, originY, originZ) {
|
|
return newInstance(this._values).scaleSelf(scaleX, scaleY, scaleZ, originX, originY, originZ)
|
|
}
|
|
|
|
scale3d (scale, originX, originY, originZ) {
|
|
return newInstance(this._values).scale3dSelf(scale, originX, originY, originZ)
|
|
}
|
|
|
|
scale3dSelf (scale, originX, originY, originZ) {
|
|
return this.scaleSelf(scale, scale, scale, originX, originY, originZ)
|
|
}
|
|
|
|
scaleSelf (scaleX, scaleY, scaleZ, originX, originY, originZ) {
|
|
// Not redundant with translate's checks because we need to negate the values later.
|
|
if (typeof originX !== 'number') originX = 0
|
|
if (typeof originY !== 'number') originY = 0
|
|
if (typeof originZ !== 'number') originZ = 0
|
|
this.translateSelf(originX, originY, originZ)
|
|
if (typeof scaleX !== 'number') scaleX = 1
|
|
if (typeof scaleY !== 'number') scaleY = scaleX
|
|
if (typeof scaleZ !== 'number') scaleZ = 1
|
|
this._values = multiply([
|
|
scaleX, 0, 0, 0,
|
|
0, scaleY, 0, 0,
|
|
0, 0, scaleZ, 0,
|
|
0, 0, 0, 1
|
|
], this._values)
|
|
this.translateSelf(-originX, -originY, -originZ)
|
|
if (scaleZ !== 1 || originZ !== 0) this._is2D = false
|
|
return this
|
|
}
|
|
|
|
rotateFromVector (x, y) {
|
|
return newInstance(this._values).rotateFromVectorSelf(x, y)
|
|
}
|
|
|
|
rotateFromVectorSelf (x, y) {
|
|
if (typeof x !== 'number') x = 0
|
|
if (typeof y !== 'number') y = 0
|
|
const theta = (x === 0 && y === 0) ? 0 : Math.atan2(y, x) * DEGREE_PER_RAD
|
|
return this.rotateSelf(theta)
|
|
}
|
|
|
|
rotate (rotX, rotY, rotZ) {
|
|
return newInstance(this._values).rotateSelf(rotX, rotY, rotZ)
|
|
}
|
|
|
|
rotateSelf (rotX, rotY, rotZ) {
|
|
if (rotY === undefined && rotZ === undefined) {
|
|
rotZ = rotX
|
|
rotX = rotY = 0
|
|
}
|
|
if (typeof rotY !== 'number') rotY = 0
|
|
if (typeof rotZ !== 'number') rotZ = 0
|
|
if (rotX !== 0 || rotY !== 0) this._is2D = false
|
|
rotX *= RAD_PER_DEGREE
|
|
rotY *= RAD_PER_DEGREE
|
|
rotZ *= RAD_PER_DEGREE
|
|
let c, s
|
|
c = Math.cos(rotZ)
|
|
s = Math.sin(rotZ)
|
|
this._values = multiply([
|
|
c, s, 0, 0,
|
|
-s, c, 0, 0,
|
|
0, 0, 1, 0,
|
|
0, 0, 0, 1
|
|
], this._values)
|
|
c = Math.cos(rotY)
|
|
s = Math.sin(rotY)
|
|
this._values = multiply([
|
|
c, 0, -s, 0,
|
|
0, 1, 0, 0,
|
|
s, 0, c, 0,
|
|
0, 0, 0, 1
|
|
], this._values)
|
|
c = Math.cos(rotX)
|
|
s = Math.sin(rotX)
|
|
this._values = multiply([
|
|
1, 0, 0, 0,
|
|
0, c, s, 0,
|
|
0, -s, c, 0,
|
|
0, 0, 0, 1
|
|
], this._values)
|
|
return this
|
|
}
|
|
|
|
rotateAxisAngle (x, y, z, angle) {
|
|
return newInstance(this._values).rotateAxisAngleSelf(x, y, z, angle)
|
|
}
|
|
|
|
rotateAxisAngleSelf (x, y, z, angle) {
|
|
if (typeof x !== 'number') x = 0
|
|
if (typeof y !== 'number') y = 0
|
|
if (typeof z !== 'number') z = 0
|
|
// Normalize axis
|
|
const length = Math.sqrt(x * x + y * y + z * z)
|
|
if (length === 0) return this
|
|
if (length !== 1) {
|
|
x /= length
|
|
y /= length
|
|
z /= length
|
|
}
|
|
angle *= RAD_PER_DEGREE
|
|
const c = Math.cos(angle)
|
|
const s = Math.sin(angle)
|
|
const t = 1 - c
|
|
const tx = t * x
|
|
const ty = t * y
|
|
// NB: This is the generic transform. If the axis is a major axis, there are
|
|
// faster transforms.
|
|
this._values = multiply([
|
|
tx * x + c, tx * y + s * z, tx * z - s * y, 0,
|
|
tx * y - s * z, ty * y + c, ty * z + s * x, 0,
|
|
tx * z + s * y, ty * z - s * x, t * z * z + c, 0,
|
|
0, 0, 0, 1
|
|
], this._values)
|
|
if (x !== 0 || y !== 0) this._is2D = false
|
|
return this
|
|
}
|
|
|
|
skewX (sx) {
|
|
return newInstance(this._values).skewXSelf(sx)
|
|
}
|
|
|
|
skewXSelf (sx) {
|
|
if (typeof sx !== 'number') return this
|
|
const t = Math.tan(sx * RAD_PER_DEGREE)
|
|
this._values = multiply([
|
|
1, 0, 0, 0,
|
|
t, 1, 0, 0,
|
|
0, 0, 1, 0,
|
|
0, 0, 0, 1
|
|
], this._values)
|
|
return this
|
|
}
|
|
|
|
skewY (sy) {
|
|
return newInstance(this._values).skewYSelf(sy)
|
|
}
|
|
|
|
skewYSelf (sy) {
|
|
if (typeof sy !== 'number') return this
|
|
const t = Math.tan(sy * RAD_PER_DEGREE)
|
|
this._values = multiply([
|
|
1, t, 0, 0,
|
|
0, 1, 0, 0,
|
|
0, 0, 1, 0,
|
|
0, 0, 0, 1
|
|
], this._values)
|
|
return this
|
|
}
|
|
|
|
flipX () {
|
|
return newInstance(multiply([
|
|
-1, 0, 0, 0,
|
|
0, 1, 0, 0,
|
|
0, 0, 1, 0,
|
|
0, 0, 0, 1
|
|
], this._values))
|
|
}
|
|
|
|
flipY () {
|
|
return newInstance(multiply([
|
|
1, 0, 0, 0,
|
|
0, -1, 0, 0,
|
|
0, 0, 1, 0,
|
|
0, 0, 0, 1
|
|
], this._values))
|
|
}
|
|
|
|
inverse () {
|
|
return newInstance(this._values).invertSelf()
|
|
}
|
|
|
|
invertSelf () {
|
|
const m = this._values
|
|
const inv = m.map(v => 0)
|
|
|
|
inv[0] = m[5] * m[10] * m[15] -
|
|
m[5] * m[11] * m[14] -
|
|
m[9] * m[6] * m[15] +
|
|
m[9] * m[7] * m[14] +
|
|
m[13] * m[6] * m[11] -
|
|
m[13] * m[7] * m[10]
|
|
|
|
inv[4] = -m[4] * m[10] * m[15] +
|
|
m[4] * m[11] * m[14] +
|
|
m[8] * m[6] * m[15] -
|
|
m[8] * m[7] * m[14] -
|
|
m[12] * m[6] * m[11] +
|
|
m[12] * m[7] * m[10]
|
|
|
|
inv[8] = m[4] * m[9] * m[15] -
|
|
m[4] * m[11] * m[13] -
|
|
m[8] * m[5] * m[15] +
|
|
m[8] * m[7] * m[13] +
|
|
m[12] * m[5] * m[11] -
|
|
m[12] * m[7] * m[9]
|
|
|
|
inv[12] = -m[4] * m[9] * m[14] +
|
|
m[4] * m[10] * m[13] +
|
|
m[8] * m[5] * m[14] -
|
|
m[8] * m[6] * m[13] -
|
|
m[12] * m[5] * m[10] +
|
|
m[12] * m[6] * m[9]
|
|
|
|
// If the determinant is zero, this matrix cannot be inverted, and all
|
|
// values should be set to NaN, with the is2D flag set to false.
|
|
|
|
const det = m[0] * inv[0] + m[1] * inv[4] + m[2] * inv[8] + m[3] * inv[12]
|
|
|
|
if (det === 0) {
|
|
this._values = m.map(v => NaN)
|
|
this._is2D = false
|
|
return this
|
|
}
|
|
|
|
inv[1] = -m[1] * m[10] * m[15] +
|
|
m[1] * m[11] * m[14] +
|
|
m[9] * m[2] * m[15] -
|
|
m[9] * m[3] * m[14] -
|
|
m[13] * m[2] * m[11] +
|
|
m[13] * m[3] * m[10]
|
|
|
|
inv[5] = m[0] * m[10] * m[15] -
|
|
m[0] * m[11] * m[14] -
|
|
m[8] * m[2] * m[15] +
|
|
m[8] * m[3] * m[14] +
|
|
m[12] * m[2] * m[11] -
|
|
m[12] * m[3] * m[10]
|
|
|
|
inv[9] = -m[0] * m[9] * m[15] +
|
|
m[0] * m[11] * m[13] +
|
|
m[8] * m[1] * m[15] -
|
|
m[8] * m[3] * m[13] -
|
|
m[12] * m[1] * m[11] +
|
|
m[12] * m[3] * m[9]
|
|
|
|
inv[13] = m[0] * m[9] * m[14] -
|
|
m[0] * m[10] * m[13] -
|
|
m[8] * m[1] * m[14] +
|
|
m[8] * m[2] * m[13] +
|
|
m[12] * m[1] * m[10] -
|
|
m[12] * m[2] * m[9]
|
|
|
|
inv[2] = m[1] * m[6] * m[15] -
|
|
m[1] * m[7] * m[14] -
|
|
m[5] * m[2] * m[15] +
|
|
m[5] * m[3] * m[14] +
|
|
m[13] * m[2] * m[7] -
|
|
m[13] * m[3] * m[6]
|
|
|
|
inv[6] = -m[0] * m[6] * m[15] +
|
|
m[0] * m[7] * m[14] +
|
|
m[4] * m[2] * m[15] -
|
|
m[4] * m[3] * m[14] -
|
|
m[12] * m[2] * m[7] +
|
|
m[12] * m[3] * m[6]
|
|
|
|
inv[10] = m[0] * m[5] * m[15] -
|
|
m[0] * m[7] * m[13] -
|
|
m[4] * m[1] * m[15] +
|
|
m[4] * m[3] * m[13] +
|
|
m[12] * m[1] * m[7] -
|
|
m[12] * m[3] * m[5]
|
|
|
|
inv[14] = -m[0] * m[5] * m[14] +
|
|
m[0] * m[6] * m[13] +
|
|
m[4] * m[1] * m[14] -
|
|
m[4] * m[2] * m[13] -
|
|
m[12] * m[1] * m[6] +
|
|
m[12] * m[2] * m[5]
|
|
|
|
inv[3] = -m[1] * m[6] * m[11] +
|
|
m[1] * m[7] * m[10] +
|
|
m[5] * m[2] * m[11] -
|
|
m[5] * m[3] * m[10] -
|
|
m[9] * m[2] * m[7] +
|
|
m[9] * m[3] * m[6]
|
|
|
|
inv[7] = m[0] * m[6] * m[11] -
|
|
m[0] * m[7] * m[10] -
|
|
m[4] * m[2] * m[11] +
|
|
m[4] * m[3] * m[10] +
|
|
m[8] * m[2] * m[7] -
|
|
m[8] * m[3] * m[6]
|
|
|
|
inv[11] = -m[0] * m[5] * m[11] +
|
|
m[0] * m[7] * m[9] +
|
|
m[4] * m[1] * m[11] -
|
|
m[4] * m[3] * m[9] -
|
|
m[8] * m[1] * m[7] +
|
|
m[8] * m[3] * m[5]
|
|
|
|
inv[15] = m[0] * m[5] * m[10] -
|
|
m[0] * m[6] * m[9] -
|
|
m[4] * m[1] * m[10] +
|
|
m[4] * m[2] * m[9] +
|
|
m[8] * m[1] * m[6] -
|
|
m[8] * m[2] * m[5]
|
|
|
|
inv.forEach((v, i) => { inv[i] = v / det })
|
|
this._values = inv
|
|
return this
|
|
}
|
|
|
|
setMatrixValue (transformList) {
|
|
const temp = new DOMMatrix(transformList)
|
|
this._values = temp._values
|
|
this._is2D = temp._is2D
|
|
return this
|
|
}
|
|
|
|
transformPoint (point) {
|
|
point = new DOMPoint(point)
|
|
const x = point.x
|
|
const y = point.y
|
|
const z = point.z
|
|
const w = point.w
|
|
const values = this._values
|
|
const nx = values[M11] * x + values[M21] * y + values[M31] * z + values[M41] * w
|
|
const ny = values[M12] * x + values[M22] * y + values[M32] * z + values[M42] * w
|
|
const nz = values[M13] * x + values[M23] * y + values[M33] * z + values[M43] * w
|
|
const nw = values[M14] * x + values[M24] * y + values[M34] * z + values[M44] * w
|
|
return new DOMPoint(nx, ny, nz, nw)
|
|
}
|
|
|
|
toFloat32Array () {
|
|
return Float32Array.from(this._values)
|
|
}
|
|
|
|
toFloat64Array () {
|
|
return this._values.slice(0)
|
|
}
|
|
|
|
static fromMatrix (init) {
|
|
if (!(init instanceof DOMMatrix)) throw new TypeError('Expected DOMMatrix')
|
|
return new DOMMatrix(init._values)
|
|
}
|
|
|
|
static fromFloat32Array (init) {
|
|
if (!(init instanceof Float32Array)) throw new TypeError('Expected Float32Array')
|
|
return new DOMMatrix(init)
|
|
}
|
|
|
|
static fromFloat64Array (init) {
|
|
if (!(init instanceof Float64Array)) throw new TypeError('Expected Float64Array')
|
|
return new DOMMatrix(init)
|
|
}
|
|
|
|
[util.inspect.custom || 'inspect'] (depth, options) {
|
|
if (depth < 0) return '[DOMMatrix]'
|
|
|
|
return `DOMMatrix [
|
|
a: ${this.a}
|
|
b: ${this.b}
|
|
c: ${this.c}
|
|
d: ${this.d}
|
|
e: ${this.e}
|
|
f: ${this.f}
|
|
m11: ${this.m11}
|
|
m12: ${this.m12}
|
|
m13: ${this.m13}
|
|
m14: ${this.m14}
|
|
m21: ${this.m21}
|
|
m22: ${this.m22}
|
|
m23: ${this.m23}
|
|
m23: ${this.m23}
|
|
m31: ${this.m31}
|
|
m32: ${this.m32}
|
|
m33: ${this.m33}
|
|
m34: ${this.m34}
|
|
m41: ${this.m41}
|
|
m42: ${this.m42}
|
|
m43: ${this.m43}
|
|
m44: ${this.m44}
|
|
is2D: ${this.is2D}
|
|
isIdentity: ${this.isIdentity} ]`
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Checks that `value` is a number and sets the value.
|
|
*/
|
|
function setNumber2D (receiver, index, value) {
|
|
if (typeof value !== 'number') throw new TypeError('Expected number')
|
|
return (receiver._values[index] = value)
|
|
}
|
|
|
|
/**
|
|
* Checks that `value` is a number, sets `_is2D = false` if necessary and sets
|
|
* the value.
|
|
*/
|
|
function setNumber3D (receiver, index, value) {
|
|
if (typeof value !== 'number') throw new TypeError('Expected number')
|
|
if (index === M33 || index === M44) {
|
|
if (value !== 1) receiver._is2D = false
|
|
} else if (value !== 0) receiver._is2D = false
|
|
return (receiver._values[index] = value)
|
|
}
|
|
|
|
Object.defineProperties(DOMMatrix.prototype, {
|
|
m11: { get () { return this._values[M11] }, set (v) { return setNumber2D(this, M11, v) } },
|
|
m12: { get () { return this._values[M12] }, set (v) { return setNumber2D(this, M12, v) } },
|
|
m13: { get () { return this._values[M13] }, set (v) { return setNumber3D(this, M13, v) } },
|
|
m14: { get () { return this._values[M14] }, set (v) { return setNumber3D(this, M14, v) } },
|
|
m21: { get () { return this._values[M21] }, set (v) { return setNumber2D(this, M21, v) } },
|
|
m22: { get () { return this._values[M22] }, set (v) { return setNumber2D(this, M22, v) } },
|
|
m23: { get () { return this._values[M23] }, set (v) { return setNumber3D(this, M23, v) } },
|
|
m24: { get () { return this._values[M24] }, set (v) { return setNumber3D(this, M24, v) } },
|
|
m31: { get () { return this._values[M31] }, set (v) { return setNumber3D(this, M31, v) } },
|
|
m32: { get () { return this._values[M32] }, set (v) { return setNumber3D(this, M32, v) } },
|
|
m33: { get () { return this._values[M33] }, set (v) { return setNumber3D(this, M33, v) } },
|
|
m34: { get () { return this._values[M34] }, set (v) { return setNumber3D(this, M34, v) } },
|
|
m41: { get () { return this._values[M41] }, set (v) { return setNumber2D(this, M41, v) } },
|
|
m42: { get () { return this._values[M42] }, set (v) { return setNumber2D(this, M42, v) } },
|
|
m43: { get () { return this._values[M43] }, set (v) { return setNumber3D(this, M43, v) } },
|
|
m44: { get () { return this._values[M44] }, set (v) { return setNumber3D(this, M44, v) } },
|
|
|
|
a: { get () { return this.m11 }, set (v) { return (this.m11 = v) } },
|
|
b: { get () { return this.m12 }, set (v) { return (this.m12 = v) } },
|
|
c: { get () { return this.m21 }, set (v) { return (this.m21 = v) } },
|
|
d: { get () { return this.m22 }, set (v) { return (this.m22 = v) } },
|
|
e: { get () { return this.m41 }, set (v) { return (this.m41 = v) } },
|
|
f: { get () { return this.m42 }, set (v) { return (this.m42 = v) } },
|
|
|
|
is2D: { get () { return this._is2D } }, // read-only
|
|
|
|
isIdentity: {
|
|
get () {
|
|
const values = this._values
|
|
return (values[M11] === 1 && values[M12] === 0 && values[M13] === 0 && values[M14] === 0 &&
|
|
values[M21] === 0 && values[M22] === 1 && values[M23] === 0 && values[M24] === 0 &&
|
|
values[M31] === 0 && values[M32] === 0 && values[M33] === 1 && values[M34] === 0 &&
|
|
values[M41] === 0 && values[M42] === 0 && values[M43] === 0 && values[M44] === 1)
|
|
}
|
|
}
|
|
})
|
|
|
|
/**
|
|
* Instantiates a DOMMatrix, bypassing the constructor.
|
|
* @param {Float64Array} values Value to assign to `_values`. This is assigned
|
|
* without copying (okay because all usages are followed by a multiply).
|
|
*/
|
|
function newInstance (values) {
|
|
const instance = Object.create(DOMMatrix.prototype)
|
|
instance.constructor = DOMMatrix
|
|
instance._is2D = true
|
|
instance._values = values
|
|
return instance
|
|
}
|
|
|
|
function multiply (A, B) {
|
|
const dest = new Float64Array(16)
|
|
for (let i = 0; i < 4; i++) {
|
|
for (let j = 0; j < 4; j++) {
|
|
let sum = 0
|
|
for (let k = 0; k < 4; k++) {
|
|
sum += A[i * 4 + k] * B[k * 4 + j]
|
|
}
|
|
dest[i * 4 + j] = sum
|
|
}
|
|
}
|
|
return dest
|
|
}
|
|
|
|
module.exports = { DOMMatrix, DOMPoint }
|