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runtimeobject.js
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runtimeobject.js
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/*
* GDevelop JS Platform
* Copyright 2013-2016 Florian Rival ([email protected]). All rights reserved.
* This project is released under the MIT License.
*/
/**
* RuntimeObject represents an object being used on a RuntimeScene.
*
* The constructor can be called on an already existing RuntimeObject:
* In this case, the constructor will try to reuse as much already existing members
* as possible (recycling).
*
* However, you should not be calling the constructor on an already existing object
* which is not a RuntimeObject.
*
* @memberof gdjs
* @class RuntimeObject
* @param {gdjs.RuntimeScene} runtimeScene The RuntimeScene owning the object.
* @param objectData The data defining the object
*/
gdjs.RuntimeObject = function(runtimeScene, objectData)
{
this.name = objectData.name || "";
this._nameId = gdjs.RuntimeObject.getNameIdentifier(this.name);
this.type = objectData.type || "";
this.x = 0;
this.y = 0;
this.angle = 0;
this.zOrder = 0;
this.hidden = false;
this.layer = "";
this.livingOnScene = true;
this.id = runtimeScene.createNewUniqueId();
this._runtimeScene = runtimeScene; //This could/should be avoided.
//Hit boxes:
if ( this._defaultHitBoxes === undefined ) {
this._defaultHitBoxes = [];
this._defaultHitBoxes.push(gdjs.Polygon.createRectangle(0,0));
}
this.hitBoxes = this._defaultHitBoxes;
this.hitBoxesDirty = true;
if ( this.aabb === undefined )
this.aabb = { min:[0,0], max:[0,0] };
else {
this.aabb.min[0] = 0; this.aabb.min[1] = 0;
this.aabb.max[0] = 0; this.aabb.max[1] = 0;
}
//Variables:
if ( !this._variables )
this._variables = new gdjs.VariablesContainer(objectData ? objectData.variables : undefined);
else
gdjs.VariablesContainer.call(this._variables, objectData ? objectData.variables : undefined);
//Forces:
if ( this._forces === undefined )
this._forces = [];
else
this.clearForces();
//A force returned by getAverageForce method:
if (this._averageForce === undefined) this._averageForce = new gdjs.Force(0,0,false);
//Behaviors:
if (this._behaviors === undefined)
this._behaviors = []; //Contains the behaviors of the object
if (this._behaviorsTable === undefined)
this._behaviorsTable = new Hashtable(); //Also contains the behaviors: Used when a behavior is accessed by its name ( see getBehavior ).
else
this._behaviorsTable.clear();
for(var i = 0, len = objectData.behaviors.length;i<len;++i) {
var autoData = objectData.behaviors[i];
var Ctor = gdjs.getBehaviorConstructor(autoData.type);
//Try to reuse already existing behaviors.
if ( i < this._behaviors.length ) {
if ( this._behaviors[i] instanceof Ctor )
Ctor.call(this._behaviors[i], runtimeScene, autoData, this);
else
this._behaviors[i] = new Ctor(runtimeScene, autoData, this);
}
else this._behaviors.push(new Ctor(runtimeScene, autoData, this));
this._behaviorsTable.put(autoData.name, this._behaviors[i]);
}
this._behaviors.length = i;//Make sure to delete already existing behaviors which are not used anymore.
//Timers:
if (this._timers === undefined)
this._timers = new Hashtable();
else
this._timers.clear();
};
gdjs.RuntimeObject.forcesGarbage = []; //Global container for unused forces, avoiding recreating forces each tick.
//Common members functions related to the object and its runtimeScene :
/**
* Return the time elapsed since the last frame,
* in milliseconds, for the object.
*
* Objects can have different elapsed time if they are on layers with different time scales.
*
* @param {gdjs.RuntimeScene} runtimeScene The RuntimeScene the object belongs to.
*/
gdjs.RuntimeObject.prototype.getElapsedTime = function(runtimeScene) {
//TODO: Memoize?
var theLayer = runtimeScene.getLayer(this.layer);
return theLayer.getElapsedTime(runtimeScene);
}
/**
* Called once during the game loop, before events and rendering.
* @param {gdjs.RuntimeScene} runtimeScene The gdjs.RuntimeScene the object belongs to.
*/
gdjs.RuntimeObject.prototype.update = function(runtimeScene) {
//Nothing to do.
};
/**
* Called when the object is created from an initial instance at the startup of the scene.<br>
* Note that common properties (position, angle, z order...) have already been setup.
*
* @param initialInstanceData The data of the initial instance.
*/
gdjs.RuntimeObject.prototype.extraInitializationFromInitialInstance = function(initialInstanceData) {
//Nothing to do.
};
/**
* Remove an object from a scene.<br>
* Extensions writers, do not change this method. Instead, redefine the onDeletedFromScene method.
* @param {gdjs.RuntimeScene} runtimeScene The RuntimeScene owning the object.
*/
gdjs.RuntimeObject.prototype.deleteFromScene = function(runtimeScene) {
if ( this.livingOnScene ) {
runtimeScene.markObjectForDeletion(this);
this.livingOnScene = false;
}
};
/**
* Called when the object is removed from its scene.
*
* @param {gdjs.RuntimeScene} runtimeScene The RuntimeScene owning the object.
*/
gdjs.RuntimeObject.prototype.onDeletedFromScene = function(runtimeScene) {
var theLayer = runtimeScene.getLayer(this.layer);
theLayer.getRenderer().removeRendererObject(this.getRendererObject());
};
//Rendering:
/**
* Called with a callback function that should be called with the internal
* object used for rendering by the object (PIXI.DisplayObject...)
*
* @return {Object} The internal rendered object (PIXI.DisplayObject...)
*/
gdjs.RuntimeObject.prototype.getRendererObject = function() {
};
//Common properties:
/**
* Get the name of the object.
* @return {string} The object's name.
*/
gdjs.RuntimeObject.prototype.getName = function() {
return this.name;
};
/**
* Get the name identifier of the object.
* @return {number} The object's name identifier.
*/
gdjs.RuntimeObject.prototype.getNameId = function() {
return this._nameId;
};
/**
* Get the unique identifier of the object.<br>
* The identifier is set by the runtimeScene owning the object.<br>
* You can also use the id property (this._object.id) for increased efficiency instead of
* calling this method.
*
* @return {number} The object identifier
*/
gdjs.RuntimeObject.prototype.getUniqueId = function() {
return this.id;
}
;
/**
* Set the position of the object.
*
* @param {number} x The new X position
* @param {number} y The new Y position
*/
gdjs.RuntimeObject.prototype.setPosition = function(x,y) {
this.setX(x);
this.setY(y);
};
/**
* Set the X position of the object.
*
* @param {number} x The new X position
*/
gdjs.RuntimeObject.prototype.setX = function(x) {
if ( x === this.x ) return;
this.x = x;
this.hitBoxesDirty = true;
};
/**
* Get the X position of the object.
*
* @return {number} The X position of the object
*/
gdjs.RuntimeObject.prototype.getX = function() {
return this.x;
};
/**
* Set the Y position of the object.
*
* @param {number} y The new Y position
*/
gdjs.RuntimeObject.prototype.setY = function(y) {
if ( y === this.y ) return;
this.y = y;
this.hitBoxesDirty = true;
};
/**
* Get the Y position of the object.
*
* @return {number} The Y position of the object
*/
gdjs.RuntimeObject.prototype.getY = function() {
return this.y;
};
/**
* Get the X position of the rendered object.<br>
* For most objects, this will returns the same value as getX(). But if the object
* has an origin this.is not the same as the point (0,0) of the object displayed,
* getDrawableX will differs.
*
* @return {number} The X position of the rendered object.
*/
gdjs.RuntimeObject.prototype.getDrawableX = function() {
return this.getX();
};
/**
* Get the Y position of the rendered object.<br>
* For most objects, this will returns the same value as getY(). But if the object
* has an origin this.is not the same as the point (0,0) of the object displayed,
* getDrawableY will differs.
*
* @return {number} The Y position of the rendered object.
*/
gdjs.RuntimeObject.prototype.getDrawableY = function() {
return this.getY();
};
gdjs.RuntimeObject.prototype.rotateTowardPosition = function(x, y, speed, scene) {
this.rotateTowardAngle(Math.atan2(y - (this.getDrawableY() + this.getCenterY()),
x - (this.getDrawableX() + this.getCenterX()))*180/Math.PI, speed, scene);
};
gdjs.RuntimeObject.prototype.rotateTowardAngle = function(angle, speed, runtimeScene) {
if (speed === 0) {
this.setAngle(angle);
return;
}
var angularDiff = gdjs.evtTools.common.angleDifference(this.getAngle(), angle);
var diffWasPositive = angularDiff >= 0;
var newAngle = this.getAngle() + (diffWasPositive ? -1.0 : 1.0)
* speed * this.getElapsedTime(runtimeScene) / 1000;
if (gdjs.evtTools.common.angleDifference(newAngle, angle) > 0 ^ diffWasPositive)
newAngle = angle;
this.setAngle(newAngle);
if (this.getAngle() != newAngle) //Objects like sprite in 8 directions does not handle small increments...
this.setAngle(angle); //...so force them to be in the path angle anyway.
};
/**
* Rotate the object at the given speed
*
* @param {number} speed The speed, in degrees per second.
* @param {gdjs.RuntimeScene} runtimeScene The scene where the object is displayed.
*/
gdjs.RuntimeObject.prototype.rotate = function(speed, runtimeScene) {
this.setAngle(this.getAngle() + speed * this.getElapsedTime(runtimeScene) / 1000);
};
/**
* Set the angle of the object.
*
* @param {number} angle The new angle of the object
*/
gdjs.RuntimeObject.prototype.setAngle = function(angle) {
if ( this.angle === angle ) return;
this.angle = angle;
this.hitBoxesDirty = true;
};
/**
* Get the rotation of the object.
*
* @return {number} The rotation of the object, in degrees.
*/
gdjs.RuntimeObject.prototype.getAngle = function() {
return this.angle;
};
/**
* Set the layer of the object.
*
* @param {string} layer The new layer of the object
*/
gdjs.RuntimeObject.prototype.setLayer = function(layer) {
if (layer === this.layer) return;
var oldLayer = this._runtimeScene.getLayer(this.layer);
this.layer = layer;
var newLayer = this._runtimeScene.getLayer(this.layer);
var rendererObject = this.getRendererObject();
oldLayer.getRenderer().removeRendererObject(rendererObject);
newLayer.getRenderer().addRendererObject(rendererObject, this.zOrder);
};
/**
* Get the layer of the object.
*
* @return {string} The layer of the object
*/
gdjs.RuntimeObject.prototype.getLayer = function() {
return this.layer;
};
/**
* Return true if the object is on the specified layer
*
* @param {string} layer The layer to be tested.
* @return {boolean} true if the object is on the specified layer
*/
gdjs.RuntimeObject.prototype.isOnLayer = function(layer) {
return this.layer === layer;
};
/**
* Set the Z order of the object.
*
* @param {number} z The new Z order position of the object
*/
gdjs.RuntimeObject.prototype.setZOrder = function(z) {
if ( z === this.zOrder ) return;
this.zOrder = z;
if ( this.getRendererObject() ) {
var theLayer = this._runtimeScene.getLayer(this.layer);
theLayer.getRenderer().changeRendererObjectZOrder(this.getRendererObject(), z);
}
};
/**
* Get the Z order of the object.
*
* @return {number} The Z order of the object
*/
gdjs.RuntimeObject.prototype.getZOrder = function() {
return this.zOrder;
};
/**
* Get the container of the object variables
* @return {gdjs.VariablesContainer} The variables of the object
*/
gdjs.RuntimeObject.prototype.getVariables = function() {
return this._variables;
};
/**
* Get the value of a variable considered as a number. Equivalent of variable.getAsNumber()
* @param {gdjs.Variable} variable The variable to be accessed
* @return {number} The value of the specified variable
* @static
*/
gdjs.RuntimeObject.getVariableNumber = function(variable) {
return variable.getAsNumber();
};
gdjs.RuntimeObject.prototype.getVariableNumber = gdjs.RuntimeObject.getVariableNumber;
/**
* Return the variable passed as argument without any change.
* Only for usage by events.
*
* @param {gdjs.Variable} variable The variable to be accessed
* @return The specified variable
* @static
*/
gdjs.RuntimeObject.returnVariable = function(variable) {
return variable;
}
gdjs.RuntimeObject.prototype.returnVariable = gdjs.RuntimeObject.returnVariable;
/**
* Get the value of a variable considered as a string. Equivalent of variable.getAsString()
* @param variable The variable to be accessed
* @return The string of the specified variable
* @static
*/
gdjs.RuntimeObject.getVariableString = function(variable) {
return variable.getAsString();
};
gdjs.RuntimeObject.prototype.getVariableString = gdjs.RuntimeObject.getVariableString;
/**
* Get the number of children from a variable
* @param variable The variable to be accessed
* @return The number of children
* @static
*/
gdjs.RuntimeObject.getVariableChildCount = function(variable) {
if (variable.isStructure() == false) return 0;
return Object.keys(variable.getAllChildren()).length;
};
/**
* Shortcut to set the value of a variable considered as a number
* @param variable The variable to be changed
* @param {number} newValue The value to be set
*/
gdjs.RuntimeObject.setVariableNumber = function(variable, newValue) {
variable.setNumber(newValue);
};
gdjs.RuntimeObject.prototype.setVariableNumber = gdjs.RuntimeObject.setVariableNumber;
/**
* Shortcut to set the value of a variable considered as a string
* @param variable The variable to be changed
* @param newValue {String} The value to be set
*/
gdjs.RuntimeObject.setVariableString = function(variable, newValue) {
variable.setString(newValue);
};
gdjs.RuntimeObject.prototype.setVariableString = gdjs.RuntimeObject.setVariableString;
/**
* @static
* @private
* @param {gdjs.Variable} variable The variable to be tested
* @param {string} childName The name of the child
*/
gdjs.RuntimeObject.variableChildExists = function(variable, childName) {
return variable.hasChild(childName);
};
gdjs.RuntimeObject.prototype.variableChildExists = gdjs.RuntimeObject.variableChildExists;
/**
* @static
* @private
* @param {gdjs.Variable} variable The variable to be changed
* @param {string} childName The name of the child
*/
gdjs.RuntimeObject.variableRemoveChild = function(variable, childName) {
return variable.removeChild(childName);
};
gdjs.RuntimeObject.prototype.variableRemoveChild = gdjs.RuntimeObject.variableRemoveChild;
/**
* @static
* @private
* @param {gdjs.Variable} variable The variable to be cleared
*/
gdjs.RuntimeObject.variableClearChildren = function(variable) {
variable.clearChildren();
};
gdjs.RuntimeObject.prototype.variableClearChildren = gdjs.RuntimeObject.variableClearChildren;
/**
* Shortcut to test if a variable exists for the object.
* @param {string} name The variable to be tested
* @return {boolean} true if the variable exists.
*/
gdjs.RuntimeObject.prototype.hasVariable = function(name) {
return this._variables.has(name);
};
/**
* Hide or show the object
* @param {boolean} enable Set it to true to hide the object, false to show it.
*/
gdjs.RuntimeObject.prototype.hide = function(enable) {
if (enable === undefined) enable = true;
this.hidden = enable;
};
/**
* Return true if the object is not hidden.
* @return {boolean} true if the object is not hidden.
*/
gdjs.RuntimeObject.prototype.isVisible = function() {
return !this.hidden;
};
/**
* Return true if the object is hidden.
* @return {boolean} true if the object is hidden.
*/
gdjs.RuntimeObject.prototype.isHidden = function() {
return this.hidden;
};
/**
* Return the width of the object
* @return {number} The width of the object
*/
gdjs.RuntimeObject.prototype.getWidth = function() {
return 0;
};
/**
* Return the width of the object
* @return {number} The height of the object
*/
gdjs.RuntimeObject.prototype.getHeight = function() {
return 0;
};
/**
* Return the X position of the object center, relative to the object position.
* @return {number} the X position of the object center
*/
gdjs.RuntimeObject.prototype.getCenterX = function() {
return this.getWidth() / 2;
};
/**
* Return the Y position of the object center, relative to the object position.
* @return {number} the Y position of the object center
*/
gdjs.RuntimeObject.prototype.getCenterY = function() {
return this.getHeight() / 2;
};
//Forces :
/**
* Get a force from the garbage, or create a new force is garbage is empty.<br>
* To be used each time a force is created so as to avoid temporaries objects.
*
* @private
* @param {number} x The x coordinates of the force
* @param {number} y The y coordinates of the force
* @param {number} multiplier Set the force multiplier
*/
gdjs.RuntimeObject.prototype._getRecycledForce = function(x, y, multiplier) {
if ( gdjs.RuntimeObject.forcesGarbage.length === 0 )
return new gdjs.Force(x, y, multiplier);
else {
var recycledForce = gdjs.RuntimeObject.forcesGarbage.pop();
recycledForce.setX(x);
recycledForce.setY(y);
recycledForce.setMultiplier(multiplier);
return recycledForce;
}
};
/**
* Add a force to the object to move it.
* @param {number} x The x coordinates of the force
* @param {number} y The y coordinates of the force
* @param {number} multiplier Set the force multiplier
*/
gdjs.RuntimeObject.prototype.addForce = function(x,y, multiplier) {
this._forces.push(this._getRecycledForce(x, y, multiplier));
};
/**
* Add a force using polar coordinates.
* @param {number} angle The angle of the force, in degrees.
* @param {number} len The length of the force, in pixels.
* @param {number} multiplier Set the force multiplier
*/
gdjs.RuntimeObject.prototype.addPolarForce = function(angle, len, multiplier) {
var angleInRadians = angle/180*3.14159; //TODO: Benchmark with Math.PI
var forceX = Math.cos(angleInRadians)*len;
var forceY = Math.sin(angleInRadians)*len;
this._forces.push(this._getRecycledForce(forceX, forceY, multiplier));
};
/**
* Add a force oriented toward a position
* @param {number} x The target x position
* @param {number} y The target y position
* @param {number} len The force length, in pixels.
* @param {number} multiplier Set the force multiplier
*/
gdjs.RuntimeObject.prototype.addForceTowardPosition = function(x,y, len, multiplier) {
var angle = Math.atan2(y - (this.getDrawableY()+this.getCenterY()),
x - (this.getDrawableX()+this.getCenterX()));
var forceX = Math.cos(angle)*len;
var forceY = Math.sin(angle)*len;
this._forces.push(this._getRecycledForce(forceX, forceY, multiplier));
};
/**
* Add a force oriented toward another object.<br>
* (Shortcut for addForceTowardPosition)
* @param {gdjs.RuntimeObject} object The target object
* @param {number} len The force length, in pixels.
* @param {number} multiplier Set the force multiplier
*/
gdjs.RuntimeObject.prototype.addForceTowardObject = function(obj, len, multiplier) {
if ( obj == null ) return;
this.addForceTowardPosition(obj.getDrawableX() + obj.getCenterX(),
obj.getDrawableY() + obj.getCenterY(),
len, multiplier);
};
/**
* Deletes all forces applied on the object
*/
gdjs.RuntimeObject.prototype.clearForces = function() {
gdjs.RuntimeObject.forcesGarbage.push.apply(gdjs.RuntimeObject.forcesGarbage, this._forces);
this._forces.length = 0;
};
/**
* Return true if no forces are applied on the object.
* @return {boolean} true if no forces are applied on the object.
*/
gdjs.RuntimeObject.prototype.hasNoForces = function() {
return this._forces.length === 0;
};
/**
* Called once a step by runtimeScene to update forces magnitudes and
* remove null ones.
*/
gdjs.RuntimeObject.prototype.updateForces = function(elapsedTime) {
for(var i = 0;i<this._forces.length;) {
var force = this._forces[i];
var multiplier = force.getMultiplier();
if (multiplier === 1) { // Permanent force
++i;
} else if (multiplier === 0 || force.getLength() <= 0.001) { // Instant or force disappearing
gdjs.RuntimeObject.forcesGarbage.push(force);
this._forces.remove(i);
} else { // Deprecated way of updating forces progressively.
force.setLength(force.getLength() - force.getLength() * ( 1 - multiplier ) * elapsedTime);
++i;
}
}
};
/**
* Return a force which is the sum of all forces applied on the object.
*
* @return {gdjs.Force} A force object.
*/
gdjs.RuntimeObject.prototype.getAverageForce = function() {
var averageX = 0;
var averageY = 0;
for(var i = 0, len = this._forces.length;i<len;++i) {
averageX += this._forces[i].getX();
averageY += this._forces[i].getY();
}
this._averageForce.setX(averageX);
this._averageForce.setY(averageY);
return this._averageForce;
};
/**
* Return true if the average angle of the forces applied on the object
* is in a given range.
*
* @param {number} angle The angle to be tested.
* @param {number} toleranceInDegrees The length of the range :
* @return {boolean} true if the difference between the average angle of the forces
* and the angle parameter is inferior to toleranceInDegrees parameter.
*/
gdjs.RuntimeObject.prototype.averageForceAngleIs = function(angle, toleranceInDegrees) {
var averageAngle = this.getAverageForce().getAngle();
if ( averageAngle < 0 ) averageAngle += 360;
return Math.abs(angle-averageAngle) < toleranceInDegrees/2;
};
//Hit boxes and collision :
/**
* Get the hit boxes for the object.<br>
* The default implementation returns a basic bouding box based the size (getWidth and
* getHeight) and the center point of the object (getCenterX and getCenterY).
*
* You should probably redefine updateHitBoxes instead of this function.
*
* @return {Array} An array composed of polygon.
*/
gdjs.RuntimeObject.prototype.getHitBoxes = function() {
//Avoid a naive implementation requiring to recreate temporaries each time
//the function is called:
//(var rectangle = gdjs.Polygon.createRectangle(this.getWidth(), this.getHeight());
//...)
if ( this.hitBoxesDirty ) {
this.updateHitBoxes();
this.updateAABB();
this.hitBoxesDirty = false;
}
return this.hitBoxes;
};
/**
* Update the hit boxes for the object.
*
* The default implementation set a basic bounding box based on the size (getWidth and
* getHeight) and the center point of the object (getCenterX and getCenterY).
* Result is cached until invalidated (by a position change, angle change...).
*
* You should not call this function by yourself, it is called when necessary by getHitBoxes method.
* However, you can redefine it if your object need custom hit boxes.
*/
gdjs.RuntimeObject.prototype.updateHitBoxes = function() {
this.hitBoxes = this._defaultHitBoxes;
var width = this.getWidth();
var height = this.getHeight();
var centerX = this.getCenterX();
var centerY = this.getCenterY();
if (this.getCenterX() === width / 2 && this.getCenterY() === height / 2) {
this.hitBoxes[0].vertices[0][0] =-width/2.0;
this.hitBoxes[0].vertices[0][1] =-height/2.0;
this.hitBoxes[0].vertices[1][0] =+width/2.0;
this.hitBoxes[0].vertices[1][1] =-height/2.0;
this.hitBoxes[0].vertices[2][0] =+width/2.0;
this.hitBoxes[0].vertices[2][1] =+height/2.0;
this.hitBoxes[0].vertices[3][0] =-width/2.0;
this.hitBoxes[0].vertices[3][1] =+height/2.0;
this.hitBoxes[0].rotate(this.getAngle()/180*Math.PI);
this.hitBoxes[0].move(this.getDrawableX()+this.getCenterX(), this.getDrawableY()+this.getCenterY());
} else {
this.hitBoxes[0].vertices[0][0] = 0;
this.hitBoxes[0].vertices[0][1] = 0;
this.hitBoxes[0].vertices[1][0] = width;
this.hitBoxes[0].vertices[1][1] = 0;
this.hitBoxes[0].vertices[2][0] = width;
this.hitBoxes[0].vertices[2][1] = height;
this.hitBoxes[0].vertices[3][0] = 0;
this.hitBoxes[0].vertices[3][1] = height;
this.hitBoxes[0].move(-centerX, -centerY);
this.hitBoxes[0].rotate(this.getAngle()/180*Math.PI);
this.hitBoxes[0].move(this.getDrawableX()+centerX, this.getDrawableY()+centerY);
}
};
/**
* @typedef {Object} AABB
* @property {Array} min The [x,y] coordinates of the top left point
* @property {Array} max The [x,y] coordinates of the bottom right point
*/
/**
* Get the AABB (axis aligned bounding box) for the object.
*
* The default implementation uses either the position/size of the object (when angle is 0) or
* hitboxes (when angle is not 0) to compute the bounding box.
* Result is cached until invalidated (by a position change, angle change...).
*
* You should probably redefine updateAABB instead of this function.
*
* @return {AABB} The bounding box (example: `{min: [10,5], max:[20,10]}`)
*/
gdjs.RuntimeObject.prototype.getAABB = function() {
if ( this.hitBoxesDirty ) {
this.updateHitBoxes();
this.updateAABB();
this.hitBoxesDirty = false;
}
return this.aabb;
};
/**
* Get the AABB (axis aligned bounding box) to be used to determine if the object
* is visible on screen. The gdjs.RuntimeScene will hide the renderer object if
* the object is not visible on screen ("culling").
*
* The default implementation uses the AABB returned by getAABB.
*
* If `null` is returned, the object is assumed to be always visible.
*
* @return {?AABB} The bounding box (example: `{min: [10,5], max:[20,10]}`) or `null`.
*/
gdjs.RuntimeObject.prototype.getVisibilityAABB = function() {
return this.getAABB();
};
/**
* Update the AABB (axis aligned bounding box) for the object.
*
* Default implementation uses either the position/size of the object (when angle is 0) or
* hitboxes (when angle is not 0) to compute the bounding box.
*
* You should not call this function by yourself, it is called when necessary by getAABB method.
* However, you can redefine it if your object can have a faster implementation.
*/
gdjs.RuntimeObject.prototype.updateAABB = function() {
if (this.getAngle() === 0) {
// Fast/simple computation of AABB for non rotated object
// (works even for object with non default center/origin
// because we're using getDrawableX/Y)
this.aabb.min[0] = this.getDrawableX();
this.aabb.min[1] = this.getDrawableY();
this.aabb.max[0] = this.aabb.min[0] + this.getWidth();
this.aabb.max[1] = this.aabb.min[1] + this.getHeight();
} else {
// Use hitboxes if object is rotated to ensure that the AABB
// is properly bounding the whole object.
// Slower (10-15% slower).
var first = true;
for(var i = 0;i<this.hitBoxes.length;i++) {
for(var j = 0;j<this.hitBoxes[i].vertices.length;j++) {
var vertex = this.hitBoxes[i].vertices[j];
if (first) {
this.aabb.min[0] = vertex[0];
this.aabb.max[0] = vertex[0];
this.aabb.min[1] = vertex[1];
this.aabb.max[1] = vertex[1];
first = false;
} else {
this.aabb.min[0] = Math.min(this.aabb.min[0], vertex[0]);
this.aabb.max[0] = Math.max(this.aabb.max[0], vertex[0]);
this.aabb.min[1] = Math.min(this.aabb.min[1], vertex[1]);
this.aabb.max[1] = Math.max(this.aabb.max[1], vertex[1]);
}
}
}
}
};
//Behaviors:
/**
* Call each behavior stepPreEvents method.
*/
gdjs.RuntimeObject.prototype.stepBehaviorsPreEvents = function(runtimeScene) {
for(var i = 0, len = this._behaviors.length;i<len;++i) {
this._behaviors[i].stepPreEvents(runtimeScene);
}
};
/**
* Call each behavior stepPostEvents method.
*/
gdjs.RuntimeObject.prototype.stepBehaviorsPostEvents = function(runtimeScene) {
for(var i = 0, len = this._behaviors.length;i<len;++i) {
this._behaviors[i].stepPostEvents(runtimeScene);
}
};
/**
* Get a behavior from its name.
*
* Be careful, the behavior must exists, no check is made on the name.
*
* @param name {String} The behavior name.
* @return {gdjs.RuntimeBehavior} The behavior with the given name, or undefined.
*/
gdjs.RuntimeObject.prototype.getBehavior = function(name) {
return this._behaviorsTable.get(name);
};
/**
* Check if a behavior is used by the object.
*
* @param name {String} The behavior name.
*/
gdjs.RuntimeObject.prototype.hasBehavior = function(name) {
return this._behaviorsTable.containsKey(name);
};
/**
* De/activate a behavior of the object.
*
* @param name {String} The behavior name.
* @param enable {boolean} true to activate the behavior
*/
gdjs.RuntimeObject.prototype.activateBehavior = function(name, enable) {
if ( this._behaviorsTable.containsKey(name) ) {
this._behaviorsTable.get(name).activate(enable);
}
};
/**
* Check if a behavior is activated
*
* @param name {String} The behavior name.
* @return true if the behavior is activated.
*/
gdjs.RuntimeObject.prototype.behaviorActivated = function(name) {
if ( this._behaviorsTable.containsKey(name) ) {
return this._behaviorsTable.get(name).activated();
}
return false;
};
//Timers:
/**
* Updates the object timers. Called once during the game loop, before events and rendering.
* @param {number} elapsedTime The elapsed time since the previous frame in milliseconds.
*/
gdjs.RuntimeObject.prototype.updateTimers = function(elapsedTime) {
for (var name in this._timers.items) {
if (this._timers.items.hasOwnProperty(name)) {
this._timers.items[name].updateTime(elapsedTime);
}
}
};
/**
* Test a timer elapsed time, if the timer doesn't exist it is created
* @param {String} timerName The timer name
* @param {number} timeInSeconds The time value to check in seconds
* @return {boolean} True if the timer exists and its value is greater than or equal than the given time, false otherwise
*/
gdjs.RuntimeObject.prototype.timerElapsedTime = function(timerName, timeInSeconds) {
if ( !this._timers.containsKey(timerName) ) {
this._timers.put(timerName, new gdjs.Timer(timerName));
return false;
}
return this.getTimerElapsedTimeInSeconds(timerName) >= timeInSeconds;
};
/**
* Test a if a timer is paused
* @param {String} timerName The timer name
* @return {boolean} True if the timer exists and is paused, false otherwise
*/
gdjs.RuntimeObject.prototype.timerPaused = function(timerName) {
if ( !this._timers.containsKey(timerName) ) {
return false;
}
return this._timers.get(timerName).isPaused();
};
/**
* Reset a timer, if the timer doesn't exist it is created
* @param {String} timerName The timer name
*/
gdjs.RuntimeObject.prototype.resetTimer = function(timerName) {
if ( !this._timers.containsKey(timerName) ) {
this._timers.put(timerName, new gdjs.Timer(timerName));
}
this._timers.get(timerName).reset();
};
/**
* Pause a timer, if the timer doesn't exist it is created
* @param {String} timerName The timer name
*/
gdjs.RuntimeObject.prototype.pauseTimer = function(timerName) {
if ( !this._timers.containsKey(timerName) ) {
this._timers.put(timerName, new gdjs.Timer(timerName));
}
this._timers.get(timerName).setPaused(true);
};