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<h1 class="page-title">Source: math/mat32.js</h1>
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<pre class="prettyprint source"><code>if (typeof(define) !== "function") {
var define = require("amdefine")(module);
}
define([
"odin/math/mathf"
],
function(Mathf) {
"use strict";
var sqrt = Math.sqrt,
cos = Math.cos,
sin = Math.sin,
atan2 = Math.atan2;
/**
* @class Mat32
* 3x2 matrix
* @param Number m11
* @param Number m12
* @param Number m13
* @param Number m21
* @param Number m22
* @param Number m23
*/
function Mat32(m11, m12, m13, m21, m22, m23) {
var te = new Float32Array(6);
/**
* @property Float32Array elements
* @memberof Odin.Mat32
*/
this.elements = te;
te[0] = m11 !== undefined ? m11 : 1;
te[2] = m12 || 0;
te[4] = m13 || 0;
te[1] = m21 || 0;
te[3] = m22 !== undefined ? m22 : 1;
te[5] = m23 || 0;
}
Mathf._classes["Mat32"] = Mat32;
/**
* @method clone
* @memberof Odin.Mat32
* returns new instance of this
* @return Mat32
*/
Mat32.prototype.clone = function() {
var te = this.elements;
return new Mat32(
te[0], te[1], te[2],
te[3], te[4], te[5]
);
};
/**
* @method copy
* @memberof Odin.Mat32
* copies other
* @param Mat32 other
* @return this
*/
Mat32.prototype.copy = function(other) {
var te = this.elements,
me = other.elements;
te[0] = me[0];
te[1] = me[1];
te[2] = me[2];
te[3] = me[3];
te[4] = me[4];
te[5] = me[5];
return this;
};
/**
* @method set
* @memberof Odin.Mat32
* sets values of this
* @param Number m11
* @param Number m12
* @param Number m13
* @param Number m21
* @param Number m22
* @param Number m23
* @return this
*/
Mat32.prototype.set = function(m11, m12, m13, m21, m22, m23) {
var te = this.elements;
te[0] = m11;
te[2] = m12;
te[4] = m13;
te[1] = m21;
te[3] = m22;
te[5] = m23;
return this;
};
/**
* @method mul
* @memberof Odin.Mat32
* muliples this's values by other's
* @param Mat32 other
* @return this
*/
Mat32.prototype.mul = function(other) {
var ae = this.elements,
be = other.elements,
a11 = ae[0],
a12 = ae[2],
a13 = ae[4],
a21 = ae[1],
a22 = ae[3],
a23 = ae[5],
b11 = be[0],
b12 = be[2],
b13 = be[4],
b21 = be[1],
b22 = be[3],
b23 = be[5];
ae[0] = a11 * b11 + a21 * b12;
ae[2] = a12 * b11 + a22 * b12;
ae[1] = a11 * b21 + a21 * b22;
ae[3] = a12 * b21 + a22 * b22;
ae[4] = a11 * b13 + a12 * b23 + a13;
ae[5] = a21 * b13 + a22 * b23 + a23;
return this;
};
/**
* @method mmul
* @memberof Odin.Mat32
* muliples a and b saves it in this
* @param Mat32 a
* @param Mat32 b
* @return this
*/
Mat32.prototype.mmul = function(a, b) {
var te = this.elements,
ae = a.elements,
be = b.elements,
a11 = ae[0],
a12 = ae[2],
a13 = ae[4],
a21 = ae[1],
a22 = ae[3],
a23 = ae[5],
b11 = be[0],
b12 = be[2],
b13 = be[4],
b21 = be[1],
b22 = be[3],
b23 = be[5];
te[0] = a11 * b11 + a21 * b12;
te[2] = a12 * b11 + a22 * b12;
te[1] = a11 * b21 + a21 * b22;
te[3] = a12 * b21 + a22 * b22;
te[4] = a11 * b13 + a12 * b23 + a13;
te[5] = a21 * b13 + a22 * b23 + a23;
return this;
};
/**
* @method smul
* @memberof Odin.Mat32
* muliples this by a scalar value
* @param Number s
* @return this
*/
Mat32.prototype.smul = function(s) {
var te = this.elements;
te[0] *= s;
te[1] *= s;
te[2] *= s;
te[3] *= s;
te[4] *= s;
te[5] *= s;
return this;
};
/**
* @method sdiv
* @memberof Odin.Mat32
* divides this by scalar value
* @param Number s
* @return this
*/
Mat32.prototype.sdiv = function(s) {
var te = this.elements;
s = s !== 0 ? 1 / s : 1;
te[0] *= s;
te[1] *= s;
te[2] *= s;
te[3] *= s;
te[4] *= s;
te[5] *= s;
return this;
};
/**
* @method identity
* @memberof Odin.Mat32
* identity matrix
* @return this
*/
Mat32.prototype.identity = function() {
var te = this.elements;
te[0] = 1;
te[1] = 0;
te[2] = 0;
te[3] = 1;
te[4] = 0;
te[5] = 0;
return this;
};
/**
* @method zero
* @memberof Odin.Mat32
* zero matrix
* @return this
*/
Mat32.prototype.zero = function() {
var te = this.elements;
te[0] = 0;
te[1] = 0;
te[2] = 0;
te[3] = 0;
te[4] = 0;
te[5] = 0;
return this;
};
/**
* @method determinant
* @memberof Odin.Mat32
* returns the determinant of this
* @return this
*/
Mat32.prototype.determinant = function() {
var te = this.elements;
return te[0] * te[3] - te[2] * te[1];
};
/**
* @method inverse
* @memberof Odin.Mat32
* returns the inverse of this
* @return this
*/
Mat32.prototype.inverse = function() {
var te = this.elements,
m11 = te[0],
m12 = te[2],
m13 = te[4],
m21 = te[1],
m22 = te[3],
m23 = te[5],
det = m11 * m22 - m12 * m21;
det = det !== 0 ? 1 / det : 0;
te[0] = m22 * det;
te[1] = -m12 * det;
te[2] = -m21 * det;
te[3] = m11 * det;
te[4] = (m12 * m23 - m22 * m13) * det;
te[5] = (m21 * m13 - m11 * m23) * det;
return this;
};
/**
* @method inverseMat
* @memberof Odin.Mat32
* returns the inverse of other
* @param Mat32 other
* @return this
*/
Mat32.prototype.inverseMat = function(other) {
var te = this.elements,
me = other.elements,
m11 = me[0],
m12 = me[2],
m13 = me[4],
m21 = me[1],
m22 = me[3],
m23 = me[5],
det = m11 * m22 - m12 * m21;
det = det !== 0 ? 1 / det : 0;
te[0] = m22 * det;
te[1] = -m12 * det;
te[2] = -m21 * det;
te[3] = m11 * det;
te[4] = (m12 * m23 - m22 * m13) * det;
te[5] = (m21 * m13 - m11 * m23) * det;
return this;
};
/**
* @method transpose
* @memberof Odin.Mat32
* transposes this matrix
* @return this
*/
Mat32.prototype.transpose = function() {
var te = this.elements,
tmp;
tmp = te[1];
te[1] = te[2];
te[2] = tmp;
return this;
};
/**
* @method setTrace
* @memberof Odin.Mat32
* sets the diagonal of matrix
* @param Number x
* @param Number y
* @return this
*/
Mat32.prototype.setTrace = function(x, y) {
var te = this.elements;
te[0] = x;
te[3] = y;
return this;
};
/**
* @method lookAt
* @memberof Odin.Mat32
* makes matrix look from eye to target
* @param Vec2 eye
* @param Vec2 target
* @return this
*/
Mat32.prototype.lookAt = function(eye, target) {
var te = this.elements,
x = target.x - eye.x,
y = target.y - eye.y,
a = atan2(y, x) - HALF_PI,
c = cos(a),
s = sin(a);
te[0] = c;
te[1] = s;
te[2] = -s;
te[3] = c;
return this;
};
/**
* @method compose
* @memberof Odin.Mat32
* sets matrix from position, scale, and an angle in radians
* @param Vec2 position
* @param Vec2 scale
* @param Number angle
* @return this
*/
Mat32.prototype.compose = function(position, scale, angle) {
var te = this.elements,
sx = scale.x,
sy = scale.y,
c = cos(angle),
s = sin(angle);
te[0] = c * sx;
te[1] = s * sx;
te[2] = -s * sy;
te[3] = c * sy;
te[4] = position.x;
te[5] = position.y;
return this;
};
/**
* @method decompose
* @memberof Odin.Mat32
* gets matrix position, scale, and returns its angle in radians
* @param Vec2 position
* @param Vec2 scale
* @return Number
*/
Mat32.prototype.decompose = function(position, scale) {
var te = this.elements,
m11 = te[0],
m12 = te[1],
sx = scale.set(m11, m12).length(),
sy = scale.set(te[2], te[3]).length();
position.x = te[4];
position.y = te[5];
scale.x = sx;
scale.y = sy;
return atan2(m12, m11);
};
/**
* @method setRotation
* @memberof Odin.Mat32
* sets the rotation in radians this
* @param Number angle
* @return this
*/
Mat32.prototype.setRotation = function(angle) {
var te = this.elements,
c = cos(angle),
s = sin(angle);
te[0] = c;
te[1] = s;
te[2] = -s;
te[3] = c;
return this;
};
/**
* @method getRotation
* @memberof Odin.Mat32
* returns the rotation in radians of this
* @return Number
*/
Mat32.prototype.getRotation = function() {
var te = this.elements;
return atan2(te[1], te[0]);
};
/**
* @method setPosition
* @memberof Odin.Mat32
* sets the position of this
* @param Vec2 v
* @return this
*/
Mat32.prototype.setPosition = function(v) {
var te = this.elements;
te[4] = v.x;
te[5] = v.y;
return this;
};
/**
* @method getPosition
* @memberof Odin.Mat32
* gets the position of this
* @param Vec2 v
* @return Vec2
*/
Mat32.prototype.getPosition = function(v) {
var te = this.elements;
v.x = te[4];
v.y = te[5];
return v;
};
/**
* @method extractPosition
* @memberof Odin.Mat32
* gets position from other saves it in this
* @param Mat32 other
* @return this
*/
Mat32.prototype.extractPosition = function(other) {
var te = this.elements,
me = other.elements;
te[4] = me[4];
te[5] = me[5];
return this;
};
/**
* @method extractRotation
* @memberof Odin.Mat32
* gets rotation from other saves it in this
* @param Mat32 other
* @return this
*/
Mat32.prototype.extractRotation = function(other) {
var te = this.elements,
me = other.elements,
m11 = me[0],
m12 = me[2],
m21 = me[1],
m22 = me[3],
x = m11 * m11 + m21 * m21,
y = m12 * m12 + m22 * m22,
sx = x > 0 ? 1 / sqrt(x) : 0,
sy = y > 0 ? 1 / sqrt(y) : 0;
te[0] = m11 * sx;
te[1] = m21 * sx;
te[2] = m12 * sy;
te[3] = m22 * sy;
return this;
};
/**
* @method translate
* @memberof Odin.Mat32
* translates matrix by vector
* @param Vec2 v
* @return this
*/
Mat32.prototype.translate = function(v) {
var te = this.elements,
x = v.x,
y = v.y;
te[4] = te[0] * x + te[2] * y + te[4];
te[5] = te[1] * x + te[3] * y + te[5];
return this;
};
/**
* @method rotate
* @memberof Odin.Mat32
* rotates this by angle in radians
* @param Number angle
* @return this
*/
Mat32.prototype.rotate = function(angle) {
var te = this.elements,
m11 = te[0],
m12 = te[2],
m21 = te[1],
m22 = te[3],
s = sin(angle),
c = sin(angle);
te[0] = m11 * c + m12 * s;
te[1] = m11 * -s + m12 * c;
te[2] = m21 * c + m22 * s;
te[3] = m21 * -s + m22 * c;
return this;
};
/**
* @method scale
* @memberof Odin.Mat32
* scales matrix by vector
* @param Vec2 v
* @return this
*/
Mat32.prototype.scale = function(v) {
var te = this.elements,
x = v.x,
y = v.y;
te[0] *= x;
te[1] *= x;
te[4] *= x;
te[2] *= y;
te[3] *= y;
te[5] *= y;
return this;
};
/**
* @method orthographic
* @memberof Odin.Mat32
* makes orthographic matrix
* @param Number left
* @param Number right
* @param Number bottom
* @param Number top
* @return Mat32
*/
Mat32.prototype.orthographic = function(left, right, top, bottom) {
var te = this.elements,
w = right - left,
h = top - bottom,
x = (right + left) / w,
y = (top + bottom) / h;
te[0] = 2 / w;
te[1] = 0;
te[2] = 0;
te[3] = 2 / h;
te[4] = -x;
te[5] = -y;
return this;
};
/**
* @method fromMat3
* @memberof Odin.Mat32
* sets this from Mat3
* @param Mat3 m
* @return this
*/
Mat32.prototype.fromMat3 = function(m) {
var te = this.elements,
me = m.elements;
te[0] = me[0];
te[1] = me[1];
te[2] = me[3];
te[3] = me[4];
te[4] = 0;
te[5] = 0;
return this;
};
/**
* @method fromMat4
* @memberof Odin.Mat32
* sets this from Mat4
* @param Mat4 m
* @return this
*/
Mat32.prototype.fromMat4 = function(m) {
var te = this.elements,
me = m.elements;
te[0] = me[0];
te[1] = me[1];
te[2] = me[4];
te[3] = me[5];
te[4] = me[11];
te[5] = me[12];
return this;
};
/**
* @memberof Odin.Mat32
* @param Odin.Mat32 other
* @return this
*/
Mat32.prototype.equals = function(other) {
var ae = this.elements,
be = other.elements;
return !(
ae[0] !== be[0] ||
ae[1] !== be[1] ||
ae[2] !== be[2] ||
ae[3] !== be[3] ||
ae[4] !== be[4] ||
ae[5] !== be[5]
);
};
/**
* @method fromJSON
* @memberof Odin.Mat32
* sets values from JSON object
* @param Object json
* @return this
*/
Mat32.prototype.fromJSON = function(json) {
var te = this.elements,
me = json.elements;
te[0] = me[0];
te[1] = me[1];
te[2] = me[2];
te[3] = me[3];
te[4] = me[4];
te[5] = me[5];
return this;
};
/**
* @method toJSON
* @memberof Odin.Mat32
* returns json object of this
* @return Object
*/
Mat32.prototype.toJSON = function(json) {
json || (json = {});
var te = this.elements,
je = json.elements || (json.elements = []);
json._className = "Mat32";
je[0] = te[0];
je[1] = te[1];
je[2] = te[2];
je[3] = te[3];
je[4] = te[4];
je[5] = te[5];
return json;
};
/**
* @method toString
* @memberof Odin.Mat32
* returns string of this
* @return String
*/
Mat32.prototype.toString = function() {
var te = this.elements;
return (
"Mat32[ " + te[0] + ", " + te[2] + ", " + te[4] + "]\n" +
" [ " + te[1] + ", " + te[3] + ", " + te[5] + "]"
);
};
return Mat32;
}
);
</code></pre>
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