phaser/Phaser/utils/SpriteUtils.ts
2013-08-16 00:14:57 +01:00

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TypeScript

/// <reference path="../_definitions.ts" />
/**
* @author Richard Davey <rich@photonstorm.com>
* @copyright 2013 Photon Storm Ltd.
* @license https://github.com/photonstorm/phaser/blob/master/license.txt MIT License
* @module Phaser
*/
module Phaser {
/**
* A collection of methods useful for manipulating and comparing Sprites.
*
* @class SpriteUtils
*/
export class SpriteUtils {
/**
* A temporary internal variable.
* @property _tempPoint
* @type {Phaser.Point}
*/
public static _tempPoint: Phaser.Point;
/**
* A temporary internal variable.
* @property _sin
* @type {Number}
*/
public static _sin: number;
/**
* A temporary internal variable.
* @property _cos
* @type {Number}
*/
public static _cos: number;
/**
* Updates a Sprites cameraView Rectangle based on the given camera, sprite world position and rotation.
* @method updateCameraView
* @param {Camera} camera The Camera to use in the view
* @param {Sprite} sprite The Sprite that will have its cameraView property modified
* @return {Rectangle} A reference to the Sprite.cameraView property
*/
public static updateCameraView(camera: Phaser.Camera, sprite: Phaser.Sprite): Phaser.Rectangle {
if (sprite.rotation == 0 || sprite.texture.renderRotation == false)
{
// Easy out
sprite.cameraView.x = Math.floor(sprite.x - (camera.worldView.x * sprite.transform.scrollFactor.x) - (sprite.width * sprite.transform.origin.x));
sprite.cameraView.y = Math.floor(sprite.y - (camera.worldView.y * sprite.transform.scrollFactor.y) - (sprite.height * sprite.transform.origin.y));
sprite.cameraView.width = sprite.width;
sprite.cameraView.height = sprite.height;
}
else
{
// If the sprite is rotated around its center we can use this quicker method:
if (sprite.transform.origin.x == 0.5 && sprite.transform.origin.y == 0.5)
{
Phaser.SpriteUtils._sin = sprite.transform.sin;
Phaser.SpriteUtils._cos = sprite.transform.cos;
if (Phaser.SpriteUtils._sin < 0)
{
Phaser.SpriteUtils._sin = -Phaser.SpriteUtils._sin;
}
if (Phaser.SpriteUtils._cos < 0)
{
Phaser.SpriteUtils._cos = -Phaser.SpriteUtils._cos;
}
sprite.cameraView.width = Math.round(sprite.height * Phaser.SpriteUtils._sin + sprite.width * Phaser.SpriteUtils._cos);
sprite.cameraView.height = Math.round(sprite.height * Phaser.SpriteUtils._cos + sprite.width * Phaser.SpriteUtils._sin);
sprite.cameraView.x = Math.round(sprite.x - (camera.worldView.x * sprite.transform.scrollFactor.x) - (sprite.cameraView.width * sprite.transform.origin.x));
sprite.cameraView.y = Math.round(sprite.y - (camera.worldView.y * sprite.transform.scrollFactor.y) - (sprite.cameraView.height * sprite.transform.origin.y));
}
else
{
sprite.cameraView.x = Math.min(sprite.transform.upperLeft.x, sprite.transform.upperRight.x, sprite.transform.bottomLeft.x, sprite.transform.bottomRight.x);
sprite.cameraView.y = Math.min(sprite.transform.upperLeft.y, sprite.transform.upperRight.y, sprite.transform.bottomLeft.y, sprite.transform.bottomRight.y);
sprite.cameraView.width = Math.max(sprite.transform.upperLeft.x, sprite.transform.upperRight.x, sprite.transform.bottomLeft.x, sprite.transform.bottomRight.x) - sprite.cameraView.x;
sprite.cameraView.height = Math.max(sprite.transform.upperLeft.y, sprite.transform.upperRight.y, sprite.transform.bottomLeft.y, sprite.transform.bottomRight.y) - sprite.cameraView.y;
}
}
return sprite.cameraView;
}
/**
* Returns an array containing 4 Point objects corresponding to the 4 corners of the sprite bounds.
* @method getAsPoints
* @param {Sprite} sprite The Sprite that will have its cameraView property modified
* @return {Array} An array of Point objects.
*/
public static getAsPoints(sprite: Phaser.Sprite): Phaser.Point[] {
var out: Phaser.Point[] = [];
// top left
out.push(new Phaser.Point(sprite.x, sprite.y));
// top right
out.push(new Phaser.Point(sprite.x + sprite.width, sprite.y));
// bottom right
out.push(new Phaser.Point(sprite.x + sprite.width, sprite.y + sprite.height));
// bottom left
out.push(new Phaser.Point(sprite.x, sprite.y + sprite.height));
return out;
}
/**
* Checks to see if some <code>GameObject</code> overlaps this <code>GameObject</code> or <code>Group</code>.
* If the group has a LOT of things in it, it might be faster to use <code>Collision.overlaps()</code>.
* WARNING: Currently tilemaps do NOT support screen space overlap checks!
*
* @param objectOrGroup {object} The object or group being tested.
* @param inScreenSpace {bool} Whether to take scroll factors numbero account when checking for overlap. Default is false, or "only compare in world space."
* @param camera {Camera} Specify which game camera you want. If null getScreenXY() will just grab the first global camera.
*
* @return {bool} Whether or not the objects overlap this.
*/
/*
static overlaps(objectOrGroup, inScreenSpace: bool = false, camera: Camera = null): bool {
if (objectOrGroup.isGroup)
{
var results: bool = false;
var i: number = 0;
var members = <Group> objectOrGroup.members;
while (i < length)
{
if (this.overlaps(members[i++], inScreenSpace, camera))
{
results = true;
}
}
return results;
}
if (!inScreenSpace)
{
return (objectOrGroup.x + objectOrGroup.width > this.x) && (objectOrGroup.x < this.x + this.width) &&
(objectOrGroup.y + objectOrGroup.height > this.y) && (objectOrGroup.y < this.y + this.height);
}
if (camera == null)
{
camera = this.game.camera;
}
var objectScreenPos: Point = objectOrGroup.getScreenXY(null, camera);
this.getScreenXY(this._point, camera);
return (objectScreenPos.x + objectOrGroup.width > this._point.x) && (objectScreenPos.x < this._point.x + this.width) &&
(objectScreenPos.y + objectOrGroup.height > this._point.y) && (objectScreenPos.y < this._point.y + this.height);
}
*/
public static overlapsPointer(sprite:Phaser.Sprite, pointer: Phaser.Pointer): bool {
if (sprite.transform.scrollFactor.equals(1))
{
// We can do a world vs. world check
return Phaser.SpriteUtils.overlapsXY(sprite, pointer.worldX, pointer.worldY);
}
else if (sprite.transform.scrollFactor.equals(0))
{
// scroll factor 0 means a screen view check, as the sprite will be absolutely positioned
return Phaser.SpriteUtils.overlapsXY(sprite, pointer.x, pointer.y);
}
else
{
// If the sprite has a scroll factor other than 0 or 1 then we need to work out
// what the pointers scroll factor values would be
var px: number = pointer.worldX * sprite.transform.scrollFactor.x;
var py: number = pointer.worldY * sprite.transform.scrollFactor.y;
return Phaser.SpriteUtils.overlapsXY(sprite, px, py);
}
}
/**
* Checks to see if the given x and y coordinates overlaps this <code>Sprite</code>, taking scaling and rotation into account.
* The coordinates must be given in world space, not local or camera space.
*
* @method overlapsXY
* @param {Sprite} sprite The Sprite to check. It will take scaling and rotation into account, but NOT scroll factor.
* @param {Number} x The x coordinate in world space.
* @param {Number} y The y coordinate in world space.
* @return {bool} Whether or not the point overlaps this object.
*/
public static overlapsXY(sprite: Phaser.Sprite, x: number, y: number): bool {
// if rotation == 0 then just do a rect check instead!
//if (sprite.transform.rotation == 0)
//{
// return Phaser.RectangleUtils.contains(sprite.worldView, x, y);
//}
if ((x - sprite.transform.upperLeft.x) * (sprite.transform.upperRight.x - sprite.transform.upperLeft.x) + (y - sprite.transform.upperLeft.y) * (sprite.transform.upperRight.y - sprite.transform.upperLeft.y) < 0)
{
return false;
}
if ((x - sprite.transform.upperRight.x) * (sprite.transform.upperRight.x - sprite.transform.upperLeft.x) + (y - sprite.transform.upperRight.y) * (sprite.transform.upperRight.y - sprite.transform.upperLeft.y) > 0)
{
return false;
}
if ((x - sprite.transform.upperLeft.x) * (sprite.transform.bottomLeft.x - sprite.transform.upperLeft.x) + (y - sprite.transform.upperLeft.y) * (sprite.transform.bottomLeft.y - sprite.transform.upperLeft.y) < 0)
{
return false;
}
if ((x - sprite.transform.bottomLeft.x) * (sprite.transform.bottomLeft.x - sprite.transform.upperLeft.x) + (y - sprite.transform.bottomLeft.y) * (sprite.transform.bottomLeft.y - sprite.transform.upperLeft.y) > 0)
{
return false;
}
return true;
}
/**
* Checks to see if the given point overlaps this <code>Sprite</code>, taking scaling and rotation into account.
* The point must be given in world space, not local or camera space.
*
* @method overlapsPoint
* @param {Sprite} sprite The Sprite to check. It will take scaling and rotation into account.
* @param {Point} point The point in world space you want to check.
* @return {bool} Whether or not the point overlaps this object.
*/
public static overlapsPoint(sprite: Phaser.Sprite, point: Phaser.Point): bool {
return Phaser.SpriteUtils.overlapsXY(sprite, point.x, point.y);
}
/**
* Check and see if this object is currently on screen.
*
* @method onScreen
* @param {Sprite} sprite The Sprite to check. It will take scaling and rotation into account.
* @param {Camera} camera Specify which game camera you want. If null getScreenXY() will just grab the first global camera.
* @return {bool} Whether the object is on screen or not.
*/
public static onScreen(sprite: Phaser.Sprite, camera: Phaser.Camera = null): bool {
if (camera == null)
{
camera = sprite.game.camera;
}
Phaser.SpriteUtils.getScreenXY(sprite, SpriteUtils._tempPoint, camera);
return (Phaser.SpriteUtils._tempPoint.x + sprite.width > 0) && (Phaser.SpriteUtils._tempPoint.x < camera.width) && (Phaser.SpriteUtils._tempPoint.y + sprite.height > 0) && (Phaser.SpriteUtils._tempPoint.y < camera.height);
}
/**
* Call this to figure out the on-screen position of the object.
*
* @method getScreenXY
* @param {Sprite} sprite The Sprite to check.
* @param {Point} point Takes a <code>Point</code> object and assigns the post-scrolled X and Y values of this object to it.
* @param {Camera} camera Specify which game camera you want. If null getScreenXY() will just grab the first global camera.
* @return {Point} The <code>Point</code> you passed in, or a new <code>Point</code> if you didn't pass one, containing the screen X and Y position of this object.
*/
public static getScreenXY(sprite: Phaser.Sprite, point: Phaser.Point = null, camera: Phaser.Camera = null): Phaser.Point {
if (point == null)
{
point = new Point();
}
if (camera == null)
{
camera = sprite.game.camera;
}
point.x = sprite.x - camera.x * sprite.transform.scrollFactor.x;
point.y = sprite.y - camera.y * sprite.transform.scrollFactor.y;
point.x += (point.x > 0) ? 0.0000001 : -0.0000001;
point.y += (point.y > 0) ? 0.0000001 : -0.0000001;
return point;
}
/**
* Set the world bounds that this GameObject can exist within based on the size of the current game world.
*
* @param action {number} The action to take if the object hits the world bounds, either OUT_OF_BOUNDS_KILL or OUT_OF_BOUNDS_STOP
*/
/*
static setBoundsFromWorld(action: number = GameObject.OUT_OF_BOUNDS_STOP) {
this.setBounds(this.game.world.bounds.x, this.game.world.bounds.y, this.game.world.bounds.width, this.game.world.bounds.height);
this.outOfBoundsAction = action;
}
*/
/**
* Handy for reviving game objects. Resets their existence flags and position.
*
* @method reset
* @param {Sprite} sprite The Sprite to reset.
* @param {number} x The new X position of this object.
* @param {number} y The new Y position of this object.
* @return {Sprite} The reset Sprite object.
*/
public static reset(sprite: Phaser.Sprite, x: number, y: number):Phaser.Sprite {
sprite.revive();
sprite.x = x;
sprite.y = y;
//sprite.body.velocity.x = 0;
//sprite.body.velocity.y = 0;
//sprite.body.position.x = x;
//sprite.body.position.y = y;
return sprite;
}
/**
* Set the world bounds that this GameObject can exist within. By default a GameObject can exist anywhere
* in the world. But by setting the bounds (which are given in world dimensions, not screen dimensions)
* it can be stopped from leaving the world, or a section of it.
*
* @method setBounds
* @param {number} x x position of the bound
* @param {number} y y position of the bound
* @param {number} width width of its bound
* @param {number} height height of its bound
*/
public static setBounds(x: number, y: number, width: number, height: number) {
// Needed?
}
}
}