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Added Particle.bounds and getBounds method

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This commit is contained in:
Richard Davey 2023-01-03 17:44:11 +00:00
parent 9e10ee09ce
commit 87e15a4715
1 changed files with 45 additions and 10 deletions
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55
src/gameobjects/particles/Particle.js
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@ -8,6 +8,8 @@ var AnimationState = require('../../animations/AnimationState');
var Class = require('../../utils/Class');
var DegToRad = require('../../math/DegToRad');
var Rectangle = require('../../geom/rectangle/Rectangle');
var RotateAround = require('../../math/RotateAround');
var Vector2 = require('../../math/Vector2');
/**
* @classdesc
@ -311,10 +313,11 @@ var Particle = new Class({
this.anims = new AnimationState(this);
/**
* Internal transform values of this Particle.
* A rectangle that holds the bounds of this Particle after a call to
* the `Particle.getBounds` method has been made.
*
* @name Phaser.GameObjects.Particles.Particle#transform
* @type {object}
* @name Phaser.GameObjects.Particles.Particle#bounds
* @type {Phaser.Geom.Rectangle}
* @since 3.60.0
*/
this.bounds = new Rectangle();
@ -686,23 +689,55 @@ var Particle = new Class({
},
/**
* TODO
* Gets the bounds of this particle as a Geometry Rectangle, factoring in any
* transforms of the parent emitter and anything else above it in the display list.
*
* @method Phaser.Physics.Arcade.Body#getBounds
* Once calculated the bounds can be accessed via the `Particle.bounds` property.
*
* @method Phaser.GameObjects.Particles.Particle#getBounds
* @since 3.60.0
*
* @param {Phaser.GameObjects.Components.TransformMatrix} [matrix] - Optional transform matrix to apply to this particle.
*
* @return {Phaser.Geom.Rectangle} A Rectangle containing the transformed bounds of this particle.
*/
getBounds: function ()
getBounds: function (matrix)
{
var matrix = this.emitter.getWorldTransformMatrix();
if (matrix === undefined) { matrix = this.emitter.getWorldTransformMatrix(); }
var sx = Math.abs(matrix.scaleX) * this.scaleX;
var sy = Math.abs(matrix.scaleY) * this.scaleY;
var x = this.x;
var y = this.y;
var rotation = this.rotation;
var width = (this.frame.width * sx) / 2;
var height = (this.frame.height * sy) / 2;
var bounds = this.bounds;
bounds.setSize(this.frame.sourceWidth * sx, this.frame.sourceHeight * sy);
bounds.centerX = matrix.tx + this.x;
bounds.centerY = matrix.ty + this.y;
var topLeft = new Vector2(x - width, y - height);
var topRight = new Vector2(x + width, y - height);
var bottomLeft = new Vector2(x - width, y + height);
var bottomRight = new Vector2(x + width, y + height);
if (rotation !== 0)
{
RotateAround(topLeft, x, y, rotation);
RotateAround(topRight, x, y, rotation);
RotateAround(bottomLeft, x, y, rotation);
RotateAround(bottomRight, x, y, rotation);
}
matrix.transformPoint(topLeft.x, topLeft.y, topLeft);
matrix.transformPoint(topRight.x, topRight.y, topRight);
matrix.transformPoint(bottomLeft.x, bottomLeft.y, bottomLeft);
matrix.transformPoint(bottomRight.x, bottomRight.y, bottomRight);
bounds.x = Math.min(topLeft.x, topRight.x, bottomLeft.x, bottomRight.x);
bounds.y = Math.min(topLeft.y, topRight.y, bottomLeft.y, bottomRight.y);
bounds.width = Math.max(topLeft.x, topRight.x, bottomLeft.x, bottomRight.x) - bounds.x;
bounds.height = Math.max(topLeft.y, topRight.y, bottomLeft.y, bottomRight.y) - bounds.y;
return bounds;
},