virtualx-engine/doc/classes/Quat.xml

<?xml version="1.0" encoding="UTF-8" ?>
<class name="Quat" category="Built-In Types" version="3.0-alpha">
	<brief_description>
		Quaternion.
	</brief_description>
	<description>
		A 4-dimensional vector representing a rotation.
		The vector represents a 4 dimensional complex number where multiplication of the basis elements is not commutative (multiplying i with j gives a different result than multiplying j with i).
		Multiplying quaternions reproduces rotation sequences. However quaternions need to be often renormalized, or else they suffer from precision issues.
		It can be used to perform SLERP (spherical-linear interpolation) between two rotations.
	</description>
	<tutorials>
	</tutorials>
	<demos>
	</demos>
	<methods>
		<method name="Quat">
			<return type="Quat">
			</return>
			<argument index="0" name="x" type="float">
			</argument>
			<argument index="1" name="y" type="float">
			</argument>
			<argument index="2" name="z" type="float">
			</argument>
			<argument index="3" name="w" type="float">
			</argument>
			<description>
				Returns a quaternion defined by these values.
			</description>
		</method>
		<method name="Quat">
			<return type="Quat">
			</return>
			<argument index="0" name="axis" type="Vector3">
			</argument>
			<argument index="1" name="angle" type="float">
			</argument>
			<description>
				Returns a quaternion that will rotate around the given axis by the specified angle. The axis must be a normalized vector.
			</description>
		</method>
		<method name="Quat">
			<return type="Quat">
			</return>
			<argument index="0" name="from" type="Basis">
			</argument>
			<description>
				Returns the rotation matrix corresponding to the given quaternion.
			</description>
		</method>
		<method name="cubic_slerp">
			<return type="Quat">
			</return>
			<argument index="0" name="b" type="Quat">
			</argument>
			<argument index="1" name="pre_a" type="Quat">
			</argument>
			<argument index="2" name="post_b" type="Quat">
			</argument>
			<argument index="3" name="t" type="float">
			</argument>
			<description>
				Performs a cubic spherical-linear interpolation with another quaternion.
			</description>
		</method>
		<method name="dot">
			<return type="float">
			</return>
			<argument index="0" name="b" type="Quat">
			</argument>
			<description>
				Returns the dot product of two quaternions.
			</description>
		</method>
		<method name="inverse">
			<return type="Quat">
			</return>
			<description>
				Returns the inverse of the quaternion.
			</description>
		</method>
		<method name="is_normalized">
			<return type="bool">
			</return>
			<description>
				Returns whether the quaternion is normalized or not.
			</description>
		</method>
		<method name="length">
			<return type="float">
			</return>
			<description>
				Returns the length of the quaternion.
			</description>
		</method>
		<method name="length_squared">
			<return type="float">
			</return>
			<description>
				Returns the length of the quaternion, squared.
			</description>
		</method>
		<method name="normalized">
			<return type="Quat">
			</return>
			<description>
				Returns a copy of the quaternion, normalized to unit length.
			</description>
		</method>
		<method name="slerp">
			<return type="Quat">
			</return>
			<argument index="0" name="b" type="Quat">
			</argument>
			<argument index="1" name="t" type="float">
			</argument>
			<description>
				Performs a spherical-linear interpolation with another quaternion.
			</description>
		</method>
		<method name="slerpni">
			<return type="Quat">
			</return>
			<argument index="0" name="b" type="Quat">
			</argument>
			<argument index="1" name="t" type="float">
			</argument>
			<description>
				Performs a spherical-linear interpolation with another quaterion without checking if the rotation path is not bigger than 90°.
			</description>
		</method>
		<method name="xform">
			<return type="Vector3">
			</return>
			<argument index="0" name="v" type="Vector3">
			</argument>
			<description>
				Transforms the vector [code]v[/code] by this quaternion.
			</description>
		</method>
	</methods>
	<members>
		<member name="w" type="float" setter="" getter="">
			W component of the quaternion. Default value: [code]1[/code]
		</member>
		<member name="x" type="float" setter="" getter="">
			X component of the quaternion. Default value: [code]0[/code]
		</member>
		<member name="y" type="float" setter="" getter="">
			Y component of the quaternion. Default value: [code]0[/code]
		</member>
		<member name="z" type="float" setter="" getter="">
			Z component of the quaternion. Default value: [code]0[/code]
		</member>
	</members>
	<constants>
	</constants>
</class>