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camera_CameraViewport.js.html
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<!DOCTYPE html>
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<title>JSDoc: Source: camera/CameraViewport.js</title>
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<h1 class="page-title">Source: camera/CameraViewport.js</h1>
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<article>
<pre class="prettyprint source linenums"><code>//------------------------------------------------------------------------------
// Constructor scope
//------------------------------------------------------------------------------
/**
* Creates a CameraViewport object.
*
* @constructor
* @extends rune.geom.Rectangle
*
* @param {rune.camera.Camera} camera Reference to the camera object to which the viewport is connected.
*
* @class
* @classdesc
*
* The CameraViewport class represents a camera's viewport in the form of a
* rectangle. DisplayObject located inside the viewport is rendered to the
* camera's pixel buffer.
*/
rune.camera.CameraViewport = function(camera) {
//--------------------------------------------------------------------------
// Private properties
//--------------------------------------------------------------------------
/**
* Reference to the camera object to which this viewport is associated.
*
* @type {rune.camera.Camera}
* @private
*/
this.m_camera = camera;
/**
* Current zoom value, where 1.0 is the default, ie. rendered on a 100%
* scale.
*
* @type {number}
* @private
*/
this.m_zoom = 1;
//--------------------------------------------------------------------------
// Super call
//--------------------------------------------------------------------------
/**
* Extend Rectangle.
*/
rune.geom.Rectangle.call(this, 0, 0, camera.width, camera.height);
};
//--------------------------------------------------------------------------
// Inheritance
//--------------------------------------------------------------------------
rune.camera.CameraViewport.prototype = Object.create(rune.geom.Rectangle.prototype);
rune.camera.CameraViewport.prototype.constructor = rune.camera.CameraViewport;
//--------------------------------------------------------------------------
// Override public getter and setter methods
//--------------------------------------------------------------------------
/**
* @inheritDoc
*
* @member {number} width
* @memberof rune.camera.CameraViewport
* @instance
*/
Object.defineProperty(rune.camera.CameraViewport.prototype, "width", {
/**
* @this rune.camera.CameraViewport
* @ignore
*/
get : function() {
return this.m_camera['canvas']['width'];
},
/**
* @this rune.camera.CameraViewport
* @ignore
*/
set : function(value) {
throw new Error("Illegal operation");
}
});
/**
* @inheritDoc
*
* @member {number} height
* @memberof rune.camera.CameraViewport
* @instance
*/
Object.defineProperty(rune.camera.CameraViewport.prototype, "height", {
/**
* @this rune.camera.CameraViewport
* @ignore
*/
get : function() {
return this.m_camera['canvas']['height'];
},
/**
* @this rune.camera.CameraViewport
* @ignore
*/
set : function(value) {
throw new Error("Illegal operation");
}
});
//--------------------------------------------------------------------------
// Public getter and setter methods
//--------------------------------------------------------------------------
/**
* Current zoom value, where 1.0 is the default, ie. rendered on a 100%
* scale. The value can vary between 0.25 (min) and 4.0 (max).
*
* @member {number} zoom
* @memberof rune.camera.CameraViewport
* @instance
*/
Object.defineProperty(rune.camera.CameraViewport.prototype, "zoom", {
/**
* @this rune.camera.CameraViewport
* @ignore
*/
get : function() {
return this.m_zoom;
},
/**
* @this rune.camera.CameraViewport
* @ignore
*/
set : function(value) {
this.m_zoom = rune.util.Math.clamp(value, 0.25, 4.0);
this.m_camera['canvas'].resize(
this.m_camera['width'] / this.m_zoom,
this.m_camera['height'] / this.m_zoom
);
}
});
//------------------------------------------------------------------------------
// Internal prototype methods
//------------------------------------------------------------------------------
/**
* Removes the object and frees allocated memory.
*
* @returns {undefined}
* @package
* @ignore
*/
rune.camera.CameraViewport.prototype.dispose = function() {
this.m_camera = null;
};</code></pre>
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