new CanvasController()
Class creates listeners for a range of user events on the canvas.
This class is responsible for setting up and implimenting listeners for different sets of actions performed
on the canvas area. Including zooming, rotating and moving around the scene.
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Methods
getLatestMoveX() → {Integer}
Returns the last accumulated movement along X axis
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Returns:
getLatestMoveX Amount of movement along x axis in pixels.
- Type
- Integer
getLatestMoveZ() → {Integer}
Returns the last accumulated movement along Z axis
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Returns:
getLatestMoveZ Amount of movement along z axis in pixels.
- Type
- Integer
getLatestTargetRotationX() → {Integer}
Returns the last accumulated rotatoion on X axis
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Returns:
targetRotationX Amount of rotation along x axis in degrees.
- Type
- Integer
getLatestTargetRotationY() → {Integer}
Returns the last accumulated rotation on Y axis
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Returns:
targetRotationY Amount of rotation along y axis in degrees.
- Type
- Integer
init(r, c)
Initial function which is called on startup for creating event listeners in the canvas area.
Including scroll, mouse drag, touch drag and keyboard events.
Parameters:
| Name | Type | Description |
|---|---|---|
r |
Renderer | Renderer object to have listeners added to |
c |
Camera | Camera object to have zoom and aspect ratio modified by events |
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onDocumentMouseDown(event)
Event that calculates the rotation and movement performed by the user starting from the mouse down to
mouse up events. Sets global variables holding these values for use in the get methods used by the
Main class.
Parameters:
| Name | Type | Description |
|---|---|---|
event |
Event | Event triggured |
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onDocumentMouseMove(event)
Multiplies the rotating by 0.02 each time the mouse is moved whilst held down on the canvas.
Parameters:
| Name | Type | Description |
|---|---|---|
event |
Event | Event triggured |
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onDocumentMouseOut(event)
Removes the listeners for mouse events once a user moves the mouse out of the canvas.
Parameters:
| Name | Type | Description |
|---|---|---|
event |
Event | Event triggured |
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onDocumentMouseUp(event)
Removes the listeners for mouse events once a user releases the mouse click button on the canvas.
Parameters:
| Name | Type | Description |
|---|---|---|
event |
Event | Event triggured |
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onDocumentTouchMove(event)
Alternative event for calculating rotation, for touch devices. Will work on phones and rotate scene
when user drags across the screen.
Parameters:
| Name | Type | Description |
|---|---|---|
event |
Event | Event triggured |
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onDocumentTouchStart(event)
Adds the listener for different mouse actions once a user clicks onto the canvas, holding the mouse down/
Parameters:
| Name | Type | Description |
|---|---|---|
event |
Event | Event triggured |
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onKeyDown(event)
A listener to run each time the up, down, left and right arrows are pressed. Sets the global variables
which are acesses in get methods to navigate the camera about the canvas.
Parameters:
| Name | Type | Description |
|---|---|---|
event |
Event | Event triggured |
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onMouseScroll(event)
Updates the camera zoom parameter based on the amount scrolled. Has a maximum and minimum value of scroll.
Parameters:
| Name | Type | Description |
|---|---|---|
event |
Event | Event triggured |
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onWindowResize()
Resizes the canvas in relation to the window size. Resizes all the objects too, and changes the
camera perspective to view from the correct range.
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