quat

Lens Studio v1.0.0+

Description

A quaternion, used to represent rotation.

Constructor

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new quat(Number w, Number x, Number y, Number z) : quat

Creates a new quat.

Methods

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dot(quat y) : Number

Returns the dot product of the two quats.

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equal(quat b) : Boolean

Returns whether this quat and b are equal.

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getAngle() : Number

Returns the rotation angle of the quat.

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getAxis() : vec3

Returns the rotation axis of the quat.

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invert() : quat

Returns an inverted version of the quat.

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multiply(quat b) : quat

Returns the product of this quat and b.

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normalize() : void

Normalizes the quat.

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toEulerAngles() : vec3

Returns an euler angle representation of the quat, in radians.

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static angleAxis(Number angle, vec3 axis) : quat

Returns a new quat with angle angle and axis axis.

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static angleBetween(quat a, quat b) : Number

Returns the angle between a and b.

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static fromEulerAngles(Number x, Number y, Number z) : quat

Returns a new quat using the euler angles x, y, z (in radians).

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static fromEulerVec(vec3 eulerVec) : quat

Returns a new quat using the euler angle eulerVec (in radians).

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static lerp(quat a, quat b, Number t) : quat

Returns a new quat linearly interpolated between a and b.

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static lookAt(vec3 forwardIn, vec3 upIn) : quat

Returns a new quat with a forward vector forwardIn and up vector upIn.

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static quatIdentity() : quat

Returns the identity quaternion.

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static rotationFromTo(vec3 from, vec3 to) : quat

Returns a rotation quat between direction vectors from and to.

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static slerp(quat a, quat b, Number t) : quat

Returns a new quat spherically linearly interpolated between a and b.

Properties

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w : Number

w component of the quat.

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x : Number

x component of the quat.

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y : Number

y component of the quat.

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z : Number

z component of the quat.

Examples

// Rotate a SceneObject around the world Y axis
//@input SceneObject obj

// Degrees to rotate by
var degrees = 90 * getDeltaTime();

// Convert degrees to radians
var radians = degrees * (Math.PI / 180);

// Axis to rotate around
var axis = vec3.up();

// Rotation we will apply to the object's current rotation
var rotationToApply = quat.angleAxis(radians, axis);

// Get the object's current world rotation
var oldRotation = script.obj.getTransform().getWorldRotation();

// Get the new rotation by rotating the old rotation by rotationToApply
var newRotation = rotationToApply.multiply(oldRotation);

// Set the object's world rotation to the new rotation
script.obj.getTransform().setWorldRotation(newRotation);