new Viewport()
Used to indicate how the user views the content inside of the canvas.
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Members
inverseMatrix
Inverse of the local transformation matrix.
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matrix
Local transformation matrix applied to the object.
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matrixNeedsUpdate
If true the matrix is updated before rendering the object.
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moveOnScale
Flag to indicate if the viewport should move when scalling.
For some application its easier to focus the target if the viewport moves to the pointer location while scalling.
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position
Position of the object.
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rotation
Rotation of the object relative to its center.
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rotationPoint
Value of the initial point of rotation if the viewport is being rotated.
Is set to null when the viewport is not being rotated.
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scale
Scale of the object.
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uuid
UUID of the object.
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Methods
centerObject(object, canvas)
Center the viewport relative to a object.
The position of the object is used a central point, this method does not consider "box" attributes or other strucures in the object.
Parameters:
| Name | Type | Description |
|---|---|---|
object |
Object2D | Object to be centered on the viewport. |
canvas |
DOM | Canvas element where the image is drawn. |
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updateMatrix()
Calculate and update the viewport transformation matrix.
Also updates the inverse matrix of the viewport.
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