new Quaternion()
Represents a quaternion with optionally setting the values directly.
Just as a reminder, given an angle a and an axis x,y,z
this is what the quaternion values are:
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Example
var q = new SQR.Quaternion();
var s = Math.sin(a / 2);
q.x = x * s;
q.y = y * s;
q.z = z * s;
q.w = Math.cos(a / 2);Methods
(static) slerp(qa, qb, t, qr)
Returns a spherical linear interpolation between two quaternions.
Parameters:
| Name | Type | Description |
|---|---|---|
qa |
first quaternion |
|
qb |
second quaternion |
|
t |
interpolation value [0-1] |
|
qr |
the quaterion to store the results in and return. If omitted results are returned in a new quaternion object. |
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copyFrom(q)
Copy the values from another quaternion.
Parameters:
| Name | Type | Description |
|---|---|---|
q |
the quaternion to copy values from |
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fromAngleAxis(a, x, y, z)
Creates a quaternion out of an angle axis representation.
Parameters:
| Name | Type | Description |
|---|---|---|
a |
angle in radians |
|
x |
x component of the axis |
|
y |
y component of the axis |
|
z |
z component of the axis |
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identity()
Resets the quaternion values to identity.
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inverse()
Inverses the quaternion.
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lookAt(_dir, _up)
Sets the quaternion to point in the given direction.
Parameters:
| Name | Type | Description |
|---|---|---|
_dir |
the direction to look at |
|
_up |
the up vector |
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mag()
Returns the magniture of the quaternion.
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mul(q, rq)
Multiplies rq (or this if no rq) by q
Parameters:
| Name | Type | Description |
|---|---|---|
q |
||
rq |
if not defined this is multiplied by q |
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neg()
Negates the quaternion.
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normalize()
Normalizes the quaternion.
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set()
Set value of the Quaternion directly.
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toMatrix()
That method doesn't do anything. Check {SQR.Matrix44.TQS()} to see how to turn a Quanternion into a matrix representation.
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- To Do:
-
- Implement (or not... not sure how much this is needed)