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three.js
镜像来自 https://github.com/tazdij/three.js.git


			
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		<h1>[name]</h1>

		<div class="desc">A 4x4 Matrix.</div>


		<h2>Example</h2>

		<code>// Simple rig for rotating around 3 axes

		var m = new THREE.Matrix4();

		var m1 = new THREE.Matrix4();
		var m2 = new THREE.Matrix4();
		var m3 = new THREE.Matrix4();

		var alpha = 0;
		var beta = Math.PI;
		var gamma = Math.PI/2;

		m1.makeRotationX( alpha );
		m2.makeRotationY( beta );
		m3.makeRotationZ( gamma );

		m.multiplyMatrices( m1, m2 );
		m.multiply( m3 );
		</code>


		<h2>Constructor</h2>

		<h3>[name]( [page:Float n11], [page:Float n12], [page:Float n13], [page:Float n14], [page:Float n21], [page:Float n22], [page:Float n23], [page:Float n24], [page:Float n31], [page:Float n32], [page:Float n33], [page:Float n34], [page:Float n41], [page:Float n42], [page:Float n43], [page:Float n44] )</h3>

		<div>Initialises the matrix with the supplied n11..n44 values, or just creates an identity matrix if no values are passed.</div>

		<h2>Properties</h2>

		<h3>.[page:Float32Array elements]</h3>


		<h2>Methods</h2>

		<h3>.set( [page:Float n11], [page:Float n12], [page:Float n13], [page:Float n14], [page:Float n21], [page:Float n22], [page:Float n23], [page:Float n24], [page:Float n31], [page:Float n32], [page:Float n33], [page:Float n34], [page:Float n41], [page:Float n42], [page:Float n43], [page:Float n44] ) [page:Matrix4]</h3>
		<div>
		Sets all fields of this matrix.
		</div>

		<h3>.identity() [page:Matrix4]</h3>
		<div>
		Resets this matrix to identity.
		</div>

		<h3>.copy( [page:Matrix4 m] ) [page:Matrix4]</h3>
		<div>
		Copies a matrix *m* into this matrix.
		</div>

		<h3>.copyPosition( [page:Matrix4 m] ) [page:Matrix4]</h3>
		<div>
		Copies the translation component of the supplied matrix *m* into this matrix translation component.
		</div>

		<h3>.copyRotation( [page:Matrix4 m] ) [page:Matrix4]</h3>
		<div>
		Copies the rotation component of the supplied matrix *m* into this matrix rotation component.
		</div>

		<h3>.lookAt( [page:Vector3 eye], [page:Vector3 center], [page:Vector3 up], ) [page:Matrix4]</h3>
		<div>
		Constructs a rotation matrix, looking from *eye* towards *center* with defined *up* vector.
		</div>

		<h3>.multiply( [page:Matrix4 m] ) [page:Matrix4]</h3>
		<div>
		Multiplies this matrix by *m*.
		</div>

		<h3>.multiplyMatrices( [page:Matrix4 a], [page:Matrix4 b] ) [page:Matrix4]</h3>
		<div>
		Sets this matrix to *a x b*.
		</div>

		<h3>.multiplyToArray( [page:Matrix4 a], [page:Matrix4 b], [page:Array r] ) [page:Matrix4]</h3>
		<div>
		Sets this matrix to *a x b* and stores the result into the flat array *r*.<br />
		*r* can be either a regular Array or a TypedArray.
		</div>

		<h3>.multiplyScalar( [page:Float s] ) [page:Matrix4]</h3>
		<div>
		Multiplies this matrix by *s*.
		</div>

		<h3>.multiplyVector3( [page:Vector3 v] ) [page:Vector3]</h3>
		<div>
		Applies this matrix to *v*.
		</div>

		<h3>.multiplyVector4( [page:Vector4 v] ) [page:Vector4]</h3>
		<div>
		Applies this matrix to *v*.
		</div>

		<h3>.crossVector( [page:Vector4 a] ) [page:Vector4]</h3>
		<div>
		Computes the cross product between this matrix and the [page:Vector4] parameter *a*.
		</div>

		<h3>.determinant() [page:Float]</h3>
		<div>
		Computes determinant of this matrix.<br />
		Based on [link:http://www.euclideanspace.com/maths/algebra/matrix/functions/inverse/fourD/index.htm]
		</div>

		<h3>.transpose() [page:Matrix4]</h3>
		<div>
		Transposes this matrix.
		</div>

		<h3>.flatten() [page:Array]</h3>
		<div>
		Flattens this matrix into internal [page:Matrix4 Matrix4.flat] array.
		</div>

		<h3>.flattenToArray( [page:Array flat] ) [page:Array]</h3>
		<div>
		Flattens this matrix into supplied *flat* array.
		</div>

		<h3>.flattenToArrayOffset( [page:Array flat], [page:Integer offset] ) [page:Array]</h3>
		<div>
		Flattens this matrix into supplied *flat* array starting from *offset* position in the array.
		</div>

		<h3>.setPosition( [page:Vector3 v] ) [page:Matrix4]</h3>
		<div>
		Sets the position component for this matrix from vector *v*.
		</div>

		<h3>.getPosition() [page:Vector3]</h3>
		<div>
		Returns position component from this matrix.<br />
		Note: this method returns a reference to the internal class vector, make a copy or clone it if you don't use it right away.
		</div>

		<h3>.getColumnX() [page:Vector3]</h3>
		<div>
		Returns x column component from this matrix.<br />
		Note: this method returns a reference to the internal class vector, make a copy or clone it if you don't use it right away.
		</div>

		<h3>.getColumnY() [page:Vector3]</h3>
		<div>
		Returns y column component from this matrix.<br />
		Note: this method returns a reference to the internal class vector, make a copy or clone it if you don't use it right away.
		</div>

		<h3>.getColumnZ() [page:Vector3]</h3>
		<div>
		Returns z column component from this matrix.<br />
		Note: this method returns a reference to the internal class vector, make a copy or clone it if you don't use it right away.
		</div>

		<h3>.getInverse( [page:Matrix4 m] ) [page:Matrix4]</h3>
		<div>
		Sets this matrix to the inverse of matrix *m*.<br />
		Based on [link:http://www.euclideanspace.com/maths/algebra/matrix/functions/inverse/fourD/index.htm].
		</div>

		<h3>.makeRotationFromEuler( [page:Vector3 v], [page:String order] ) [page:Matrix4]</h3>
		<div>
		v — Rotation vector.
		order — The order of rotations. Eg. "XYZ".
		</div>
		<div>
		Sets the rotation submatrix of this matrix to the rotation specified by Euler angles, the rest of the matrix is identity.<br />
		Default order is *"XYZ"*.
		</div>

		<h3>.makeRotationFromQuaternion( [page:Quaternion q] ) [page:Matrix4]</h3>
		<div>
		Sets the rotation submatrix of this matrix to the rotation specified by *q*. The rest of the matrix is identity.
		</div>

		<h3>.scale( [page:Vector3 v] ) [page:Matrix4]</h3>
		<div>
		Multiplies the columns of this matrix by vector *v*.
		</div>

		<h3>.compose( [page:Vector3 translation], [page:Quaternion rotation], [page:Vector3 scale] ) [page:Matrix4]</h3>
		<div>
		Sets this matrix to the transformation composed of *translation*, *rotation* and *scale*.
		</div>

		<h3>.decompose( [page:Vector3 translation], [page:Quaternion rotation], [page:Vector3 scale] ) [page:Array]</h3>
		<div>
		Decomposes this matrix into the *translation*, *rotation* and *scale* components.<br />
		If parameters are not passed, new instances will be created.
		</div>

		<h3>.makeTranslation( [page:Float x], [page:Float y], [page:Float z] ) [page:Matrix4]</h3>
		<div>
		Sets this matrix as translation transform.
		</div>

		<h3>.makeRotationX( [page:Float theta] ) [page:Matrix4]</h3>
		<div>
		theta — Rotation angle in radians.
		</div>
		<div>
		Sets this matrix as rotation transform around x axis by *theta* radians.
		</div>

		<h3>.makeRotationY( [page:Float theta] ) [page:Matrix4]</h3>
		<div>
		theta — Rotation angle in radians.
		</div>
		<div>
		Sets this matrix as rotation transform around y axis by *theta* radians.
		</div>

		<h3>.makeRotationZ( [page:Float theta] ) [page:Matrix4]</h3>
		<div>
		theta — Rotation angle in radians.
		</div>
		<div>
		Sets this matrix as rotation transform around z axis by *theta* radians.
		</div>

		<h3>.makeRotationAxis( [page:Vector3 axis], [page:Float theta] ) [page:Matrix4]</h3>
		<div>
		axis — Rotation axis, should be normalized.
		theta — Rotation angle in radians.
		</div>
		<div>
		Sets this matrix as rotation transform around *axis* by *angle* radians.<br />
		Based on [link:http://www.gamedev.net/reference/articles/article1199.asp].
		</div>

		<h3>.makeScale( [page:Float x], [page:Float y], [page:Float z] ) [page:Matrix4]</h3>
		<div>
		Sets this matrix as scale transform.
		</div>

		<h3>.makeFrustum( [page:Float left], [page:Float right], [page:Float bottom], [page:Float top], [page:Float near], [page:Float far] ) [page:Matrix4]</h3>
		<div>
		Creates a [page:Frustum frustum] matrix.
		</div>

		<h3>.makePerspective( [page:Float fov], [page:Float aspect], [page:Float near], [page:Float far] ) [page:Matrix4]</h3>
		<div>
		Creates a perspective projection matrix.
		</div>

		<h3>.makeOrthographic( [page:Float left], [page:Float right], [page:Float bottom], [page:Float top], [page:Float near], [page:Float far] ) [page:Matrix4]</h3>
		<div>
		Creates an orthographic projection matrix.
		</div>

		<h3>.clone() [page:Matrix4]</h3>
		<div>
		Clones this matrix.
		</div>

		<h2>Source</h2>

		[link:https://github.com/mrdoob/three.js/blob/master/src/[path].js src/[path].js]
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