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<h1 class="page-title">Source: debug/Histogram.js</h1>
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<pre class="prettyprint source linenums"><code>//------------------------------------------------------------------------------
// Constructor scope
//------------------------------------------------------------------------------
/**
* Creates a new instance of the Histogram class.
*
* @constructor
* @extends rune.display.DisplayObject
* @package
*
* @param {number} [x] The position of the object in the x direction.
* @param {number} [y] The position of the object in the y direction.
* @param {number} [width] The width of the object.
* @param {number} [height] The height of the object.
*
* @class
* @classdesc
*
* The Histogram class represents a histogram of the current application's
* frame rate over time.
*/
rune.debug.Histogram = function(x, y, width, height) {
//--------------------------------------------------------------------------
// Private properties
//--------------------------------------------------------------------------
/**
* Histogram values.
*
* @type {Array.<number>}
* @private
*/
this.m_values = [];
/**
* Update interval delay.
*
* @type {number}
* @private
*/
this.m_delay = 0.0;
//--------------------------------------------------------------------------
// Super call
//--------------------------------------------------------------------------
/**
* Extend DisplayObject.
*/
rune.display.DisplayObject.call(this, x, y, width, height);
};
//------------------------------------------------------------------------------
// Inheritance
//------------------------------------------------------------------------------
rune.debug.Histogram.prototype = Object.create(rune.display.DisplayObject.prototype);
rune.debug.Histogram.prototype.constructor = rune.debug.Histogram;
//------------------------------------------------------------------------------
// Override public methods (ENGINE)
//------------------------------------------------------------------------------
/**
* @inheritDoc
*/
rune.debug.Histogram.prototype.init = function() {
rune.display.DisplayObject.prototype.init.call(this);
this['backgroundColor'] = rune.util.Palette.GRAY;
};
/**
* @inheritDoc
*/
rune.debug.Histogram.prototype.update = function(step) {
rune.display.DisplayObject.prototype.update.call(this, step);
this.m_updateInterval(step);
};
/**
* @inheritDoc
* @suppress {accessControls}
*/
rune.debug.Histogram.prototype.render = function() {
if (this.m_cached == false) {
this.m_renderBackgroundColor();
this.m_renderValues();
this.restoreCache();
}
};
//------------------------------------------------------------------------------
// Private prototype methods
//------------------------------------------------------------------------------
/**
* Updates the update interval.
*
* @param {number} step Current time step.
*
* @returns {undefined}
* @private
* @suppress {accessControls}
*/
rune.debug.Histogram.prototype.m_updateInterval = function(step) {
this.m_delay += step;
if (this.m_delay >= 1000) {
this.m_delay = 0;
this.m_updateValues(step);
this.breakCache();
}
};
/**
* Updates the histogram values.
*
* @returns {undefined}
* @private
* @suppress {accessControls}
*/
rune.debug.Histogram.prototype.m_updateValues = function(step) {
this.m_values.unshift(this['application']['time']['quotient']);
if (this.m_values.length > this['width']) {
this.m_values.pop();
}
};
/**
* Renders the histogram values.
*
* @returns {undefined}
* @private
*/
rune.debug.Histogram.prototype.m_renderValues = function() {
for (var i = 0, len = this.m_values.length; i < len; i++) {
var h = parseInt(this['height'] * this.m_values[i], 10);
this.m_canvas.drawRectFill(
i,
this['height'] - h,
1,
h,
this.m_getColor(this.m_values[i]),
1
);
}
};
/**
* Retrieves a color code depending on a value.
*
* @returns {string}
* @private
*/
rune.debug.Histogram.prototype.m_getColor = function(value) {
if (value < 0.6) return rune.util.Palette.RED;
if (value < 0.8) return rune.util.Palette.ORANGE;
return rune.util.Palette.GREEN;
};</code></pre>
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