/
entity.js
1450 lines (1253 loc) · 39.5 KB
/
entity.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* MelonJS Game Engine
* Copyright (C) 2012, Olivier BIOT
* http://www.melonjs.org
*
*/
(function($, undefined) {
// some ref shortcut
var MIN = Math.min;
/**
* me.ObjectSettings contains the object attributes defined in Tiled<br>
* and is created by the engine and passed as parameter to the corresponding object when loading a level<br>
* the field marked Mandatory are to be defined either in Tiled, or in the before calling the parent constructor
* <img src="object_properties.png"/><br>
* @final
* @memberOf me
* @constructor Should not be called by the user.
*/
me.ObjectSettings = {
/**
* object entity name<br>
* as defined in the Tiled Object Properties
* @public
* @type {String}
* @name me.ObjectSettings#name
*/
name : null,
/**
* image ressource name to be loaded<br>
* MANDATORY<br>
* (in case of TiledObject, this field is automatically set)
* @public
* @type {String}
* @name me.ObjectSettings#image
*/
image : null,
/**
* specify a transparent color for the image in rgb format (#rrggb)<br>
* OPTIONAL<br>
* (using this option will imply processing time on the image)
* @public
* @type {String}
* @name me.ObjectSettings#transparent_color
*/
transparent_color : null,
/**
* width of a single sprite in the spritesheet<br>
* MANDATORY<br>
* (in case of TiledObject, this field is automatically set)
* @public
* @type {Int}
* @name me.ObjectSettings#spritewidth
*/
spritewidth : null,
/**
* height of a single sprite in the spritesheet<br>
* OPTIONAL<br>
* if not specified the value will be set to the corresponding image height<br>
* (in case of TiledObject, this field is automatically set)
* @public
* @type {Int}
* @name me.ObjectSettings#spriteheight
*/
spriteheight : null,
/**
* custom type for collision detection<br>
* OPTIONAL
* @public
* @type {String}
* @name me.ObjectSettings#type
*/
type : 0,
/**
* Enable collision detection for this object<br>
* OPTIONAL
* @public
* @type {Boolean}
* @name me.ObjectSettings#collidable
*/
collidable : false
};
/**
* a pool of object entity <br>
* this object is used by the engine to instanciate object defined in the map<br>
* which means, that on level loading the engine will try to instanciate every object<br>
* found in the map, based on the user defined name in each Object Properties<br>
* <img src="object_properties.png"/><br>
* There is no constructor function for me.entityPool, this is a static object
* @final
* @memberOf me
* @constructor Should not be called by the user.
*/
me.entityPool = (function() {
// hold public stuff in our singletong
var obj = {};
/*---------------------------------------------
PRIVATE STUFF
---------------------------------------------*/
var entityClass = {};
/*---------------------------------------------
PUBLIC STUFF
---------------------------------------------*/
/*---
init
---*/
obj.init = function() {
// add default entity object
obj.add("me.LevelEntity", me.LevelEntity);
obj.add("me.ObjectEntity", me.ObjectEntity);
obj.add("me.CollectableEntity", me.CollectableEntity);
obj.add("me.InvisibleEntity", me.InvisibleEntity);
};
/**
* add an object to the pool
* @name me.entityPool#add
* @public
* @function
* @param {String} className as defined in the Name fied of the Object Properties (in Tiled)
* @param {Object} object corresponding Object to be instanciated
* @example
* // add our users defined entities in the entity pool
* me.entityPool.add("playerspawnpoint", PlayerEntity);
* me.entityPool.add("cherryentity", CherryEntity);
* me.entityPool.add("heartentity", HeartEntity);
* me.entityPool.add("starentity", StarEntity);
*/
obj.add = function(className, entityObj) {
entityClass[className.toLowerCase()] = entityObj;
};
/**
* return a new instance of the requested object
* @private
*/
obj.newInstanceOf = function(prop) {
var name = prop.name ? prop.name.toLowerCase() : undefined;
if (!name) {
return null;
}
if (!entityClass[name]) {
console.error("cannot instance entity of type '" + name
+ "': Class not found!");
return null;
}
// i should pass the entity ownProperty instead of the object itself
return new entityClass[name](prop.x, prop.y, prop);
};
// return our object
return obj;
})();
/**
* A Simple object to display a sprite on screen.
* @class
* @extends me.Rect
* @memberOf me
* @constructor
* @param {int} x the x coordinates of the sprite object
* @param {int} y the y coordinates of the sprite object
* @param {me.loader#getImage} image reference to the Sprite Image
* @param {int} [spritewidth] sprite width
* @param {int} [spriteheigth] sprite height
* @example
* // create a static Sprite Object
* mySprite = new SpriteObject (100, 100, me.loader.getImage("mySpriteImage"));
*/
me.SpriteObject = me.Rect
.extend(
/** @scope me.SpriteObject.prototype */
{
// default scale ratio of the object
scale : null,
// if true, image flipping/scaling is needed
scaleFlag : false,
// just to keep track of when we flip
lastflipX : false,
lastflipY : false,
// z position (for ordering display)
z : 0,
// image offset
offset : null,
/**
* the visible state of the object<br>
* default value : true
* @public
* @type Boolean
* @name me.SpriteObject#visible
*/
visible : true,
/**
* Set the angle (in Radians) of a sprite to rotate it <br>
* WARNING: rotating sprites decreases performances
* @public
* @type Number
* @name me.SpriteObject#angle
*/
angle: 0,
/**
* Define the sprite anchor point<br>
* This is used when using rotation, or sprite flipping<br>
* with the default anchor point being the center of the sprite
* @public
* @type me.Vector2d
* @name me.SpriteObject#anchorPoint
*/
anchorPoint: null,
// image reference
image : null,
// create a a default collision rectangle
// this object is useless here, but low level
// function like flipX need to take this in account
collisionBox : null,
// to manage the flickering effect
flickering : false,
flickerTimer : -1,
flickercb : null,
flickerState : false,
// a reference to the game vp
vp : null,
/**
* @ignore
*/
init : function(x, y, image, spritewidth, spriteheight) {
// call the parent constructor
this.parent(new me.Vector2d(x, y),
spritewidth || image.width,
spriteheight || image.height);
// cache image reference
this.image = image;
// scale factor of the object
this.scale = new me.Vector2d(1.0, 1.0);
// create a a default collision rectangle
this.collisionBox = new me.Rect(this.pos, this.width, this.height);
// get a reference to the current viewport
this.vp = me.game.viewport;
// set the default sprite index & offset
this.offset = new me.Vector2d(0, 0);
// set the default anchor point (middle of the sprite)
this.anchorPoint = new me.Vector2d(0.5, 0.5);
// sprite count (line, col)
this.spritecount = new me.Vector2d(~~(this.image.width / this.width),
~~(this.image.height / this.height));
},
/**
* specify a transparent color
* @param {String} color color key in rgb format (rrggb or #rrggb)
*/
setTransparency : function(col) {
// remove the # if present
col = (col.charAt(0) == "#") ? col.substring(1, 7) : col;
// applyRGB Filter (return a context object)
this.image = me.video.applyRGBFilter(this.image, "transparent", col.toUpperCase()).canvas;
},
/**
* return the flickering state of the object
* @return Boolean
*/
isFlickering : function() {
return this.flickering;
},
/**
* make the object flicker
* @param {Int} duration
* @param {Function} callback
* @example
* // make the object flicker for 60 frame
* // and then remove it
* this.flicker(60, function()
* {
* me.game.remove(this);
* });
*/
flicker : function(duration, callback) {
this.flickerTimer = duration;
if (this.flickerTimer < 0) {
this.flickering = false;
this.flickercb = null;
} else if (!this.flickering) {
this.flickercb = callback;
this.flickering = true;
}
},
/**
* Flip object on horizontal axis
* @param {Boolean} flip enable/disable flip
*/
flipX : function(flip) {
if (flip != this.lastflipX) {
this.lastflipX = flip;
// invert the scale.x value
this.scale.x = -this.scale.x;
// set the scaleFlag
this.scaleFlag = ((this.scale.x != 1.0) || (this.scale.y != 1.0))
// flip the collision box
this.collisionBox.flipX(this.width);
}
},
/**
* Flip object on vertical axis
* @param {Boolean} flip enable/disable flip
*/
flipY : function(flip) {
if (flip != this.lastflipY) {
this.lastflipY = flip;
// invert the scale.x value
this.scale.y = -this.scale.y;
// set the scaleFlag
this.scaleFlag = ((this.scale.x != 1.0) || (this.scale.y != 1.0))
// flip the collision box
this.collisionBox.flipY(this.height);
}
},
/**
* Resize the object around his center<br>
* Note : This won't resize the corresponding collision box
* @param {Boolean} ratio scaling ratio
*/
resize : function(ratio)
{
if (ratio > 0) {
this.scale.x = this.scale.x < 0.0 ? -ratio : ratio;
this.scale.y = this.scale.y < 0.0 ? -ratio : ratio;
// set the scaleFlag
this.scaleFlag = ((this.scale.x!= 1.0) || (this.scale.y!= 1.0))
}
},
/**
* sprite update<br>
* not to be called by the end user<br>
* called by the game manager on each game loop
* @protected
* @return false
**/
update : function() {
//update the "flickering" state if necessary
if (this.flickering) {
this.flickerTimer -= me.timer.tick;
if (this.flickerTimer < 0) {
if (this.flickercb)
this.flickercb();
this.flicker(-1);
}
return true;
}
return false;
},
/**
* object draw<br>
* not to be called by the end user<br>
* called by the game manager on each game loop
* @protected
* @param {Context2d} context 2d Context on which draw our object
**/
draw : function(context) {
// do nothing if we are flickering
if (this.flickering) {
this.flickerState = !this.flickerState;
if (!this.flickerState) return;
}
var xpos = ~~(this.pos.x - this.vp.pos.x), ypos = ~~(this.pos.y - this.vp.pos.y);
if ((this.scaleFlag) || (this.angle!==0)) {
// restore the context
context.save();
// calculate pixel pos of the anchor point
var ax = this.width * this.anchorPoint.x, ay = this.height * this.anchorPoint.y;
// translate to the defined anchor point
context.translate(xpos + ax, ypos + ay);
// scale
if (this.scaleFlag)
context.scale(this.scale.x, this.scale.y);
if (this.angle!==0)
context.rotate(this.angle);
// reset coordinates back to upper left coordinates
xpos = -ax;
ypos = -ay;
}
context.drawImage(this.image,
this.offset.x, this.offset.y,
this.width, this.height,
xpos, ypos,
this.width, this.height);
if ((this.scaleFlag) || (this.angle!==0)) {
// restore the context
context.restore();
}
if (me.debug.renderHitBox) {
// draw the sprite rectangle
this.parent(context, "blue");
// draw the collisionBox
this.collisionBox.draw(context, "red");
}
},
/**
* Destroy function<br>
* @private
*/
destroy : function() {
this.onDestroyEvent.apply(this, arguments);
},
/**
* OnDestroy Notification function<br>
* Called by engine before deleting the object
*/
onDestroyEvent : function() {
;// to be extended !
}
});
/************************************************************************************/
/* */
/* a generic object entity */
/* */
/************************************************************************************/
/**
* an object to manage animation
* @class
* @extends me.SpriteObject
* @memberOf me
* @constructor
* @param {int} x the x coordinates of the sprite object
* @param {int} y the y coordinates of the sprite object
* @param {me.loader#getImage} Image reference of the animation sheet
* @param {int} spritewidth width of a single sprite within the spritesheet
* @param {int} [spriteheight] height of a single sprite within the spritesheet (value will be set to the image height if not specified)
*/
me.AnimationSheet = me.SpriteObject
.extend(
/** @scope me.AnimationSheet.prototype */
{
// count the fps and manage animation change
fpscount : 0,
/**
* pause and resume animation<br>
* default value : false;
* @public
* @type Boolean
* @name me.AnimationSheet#animationpause
*/
animationpause : false,
/**
* animation cycling speed<br>
* default value : me.sys.fps / 10;
* @public
* @type Number
* @name me.AnimationSheet#animationspeed
*/
animationspeed : 0,
/** @private */
init : function(x, y, image, spritewidth, spriteheight) {
// hold all defined animation
this.anim = [];
// a flag to reset animation
this.resetAnim = null;
// default animation sequence
this.current = null;
// call the constructor
this.parent(x, y, image, spritewidth, spriteheight);
// if one single image, disable animation
if ((this.spritecount.x * this.spritecount.y) == 1) {
// override setAnimationFrame with an empty function
this.setAnimationFrame = function() {;};
}
// default animation speed
this.animationspeed = me.sys.fps / 10;
// create a default animation sequence with all sprites
this.addAnimation("default", null);
// set as default
this.setCurrentAnimation("default");
},
/**
* add an animation <br>
* the index list must follow the logic as per the following example :<br>
* <img src="spritesheet_grid.png"/>
* @param {String} name animation id
* @param {Int[]} index list of sprite index defining the animaton
* @example
* // walking animatin
* this.addAnimation ("walk", [0,1,2,3,4,5]);
* // eating animatin
* this.addAnimation ("eat", [6,6]);
* // rolling animatin
* this.addAnimation ("roll", [7,8,9,10]);
*/
addAnimation : function(name, frame) {
this.anim[name] = {
name : name,
frame : [],
idx : 0,
length : 0
};
if (frame == null) {
frame = [];
// create a default animation with all sprites in the spritesheet
for ( var i = 0, count = this.spritecount.x * this.spritecount.y; i < count ; i++) {
frame[i] = i;
}
}
// compute and add the offset of each frame
for ( var i = 0 , len = frame.length ; i < len; i++) {
this.anim[name].frame[i] = new me.Vector2d(this.width * (frame[i] % this.spritecount.x),
this.height * ~~(frame[i] / this.spritecount.x));
}
this.anim[name].length = this.anim[name].frame.length;
},
/**
* set the current animation
* @param {String} name animation id
* @param {Object} [onComplete] animation id to switch to when complete, or callback
* @example
* // set "walk" animation
* this.setCurrentAnimation("walk");
* // set "eat" animation, and switch to "walk" when complete
* this.setCurrentAnimation("eat", "walk");
* // set "die" animation, and remove the object when finished
* this.setCurrentAnimation("die", function(){me.game.remove(this)});
**/
setCurrentAnimation : function(name, resetAnim) {
this.current = this.anim[name];
this.resetAnim = resetAnim || null;
this.setAnimationFrame(this.current.idx); // or 0 ?
},
/**
* return true if the specified animation is the current one.
* @param {String} name animation id
* @example
* if (!this.isCurrentAnimation("walk"))
* {
* // do something horny...
* }
*/
isCurrentAnimation : function(name) {
return (this.current.name == name);
},
/**
* force the current animation frame index.
* @param {int} [index=0]
* @example
* //reset the current animation to the first frame
* this.setAnimationFrame();
*/
setAnimationFrame : function(idx) {
this.current.idx = (idx || 0) % this.current.length;
this.offset = this.current.frame[this.current.idx];
},
/**
* update the animation<br>
* this is automatically called by the game manager {@link me.game}
* @protected
*/
update : function() {
// call the parent function
this.parent();
// update animation if necessary
if (this.visible && !this.animationpause && (this.fpscount++ > this.animationspeed)) {
this.setAnimationFrame(++this.current.idx);
this.fpscount = 0;
// switch animation if we reach the end of the strip
// and a callback is defined
if ((this.current.idx == 0) && this.resetAnim) {
// if string, change to the corresponding animation
if (typeof(this.resetAnim) == "string")
this.setCurrentAnimation(this.resetAnim);
// if function (callback) call it
else if (typeof(this.resetAnim) == "function")
this.resetAnim();
}
return true;
}
return false;
}
});
/************************************************************************************/
/* */
/* a generic object entity */
/* */
/************************************************************************************/
/**
* a Generic Object Entity<br>
* Object Properties (settings) are to be defined in Tiled, <br>
* or when calling the parent constructor
*
* @class
* @extends me.AnimationSheet
* @memberOf me
* @constructor
* @param {int} x the x coordinates of the sprite object
* @param {int} y the y coordinates of the sprite object
* @param {me.ObjectSettings} settings Object Properties as defined in Tiled <br> <img src="object_properties.png"/>
*/
me.ObjectEntity = me.AnimationSheet
.extend(
/** @scope me.ObjectEntity.prototype */
{
/**
* Entity "Game Unique Identifier"<br>
* @public
* @type String
* @name me.ObjectEntity#GUID
*/
GUID : null,
/**
* define the type of the object<br>
* default value : none<br>
* @public
* @type {Object}
* @name me.ObjectEntity#type
*/
type : 0,
/**
* flag to enable collision detection for this object<br>
* default value : false<br>
* @public
* @type {Boolean}
* @name me.ObjectEntity#collidable
*/
collidable : false,
/** @private */
init : function(x, y, settings) {
this.parent(x, y,
(typeof settings.image == "string") ? me.loader.getImage(settings.image) : settings.image,
settings.spritewidth,
settings.spriteheight);
// check for user defined transparent color
if (settings.transparent_color) {
this.setTransparency(settings.transparent_color);
}
// set the object GUID value
this.GUID = me.utils.createGUID();
// set the object entity name
this.name = settings.name?settings.name.toLowerCase():"";
/**
* entity current velocity<br>
* @public
* @type me.Vector2d
* @name me.ObjectEntity#vel
*/
this.vel = new me.Vector2d();
/**
* entity current acceleration<br>
* @public
* @type me.Vector2d
* @name me.ObjectEntity#accel
*/
this.accel = new me.Vector2d();
/**
* entity current friction<br>
* @public
* @type me.Vector2d
* @name me.ObjectEntity#friction
*/
this.friction = new me.Vector2d();
/**
* max velocity (to limit entity velocity)<br>
* @public
* @type me.Vector2d
* @name me.ObjectEntity#maxVel
*/
this.maxVel = new me.Vector2d(1000,1000);
// some default contants
/**
* Default gravity value of the entity<br>
* default value : 0.98 (earth gravity)<br>
* to be set to 0 for RPG, shooter, etc...
* @public
* @type Number
* @name me.ObjectEntity#gravity
*/
this.gravity = (me.sys.gravity!=undefined)?me.sys.gravity:0.98;
// just to identify our object
this.isEntity = true;
// dead state :)
/**
* dead/living state of the entity<br>
* default value : true
* @public
* @type Boolean
* @name me.ObjectEntity#alive
*/
this.alive = true;
// some usefull variable
/**
* falling state of the object<br>
* true if the object is falling<br>
* false if the object is standing on something<br>
* (!) READ ONLY property
* @public
* @type Boolean
* @name me.ObjectEntity#falling
*/
this.falling = false;
/**
* jumping state of the object<br>
* equal true if the entity is jumping<br>
* (!) READ ONLY property
* @public
* @type Boolean
* @name me.ObjectEntity#jumping
*/
this.jumping = true;
// some usefull slope variable
this.slopeY = 0;
/**
* equal true if the entity is standing on a slope<br>
* (!) READ ONLY property
* @public
* @type Boolean
* @name me.ObjectEntity#onslope
*/
this.onslope = false;
/**
* equal true if the entity is on a ladder<br>
* (!) READ ONLY property
* @public
* @type Boolean
* @name me.ObjectEntity#onladder
*/
this.onladder = false;
// to enable collision detection
this.collidable = settings.collidable || false;
//this.collectable = false;
this.type = settings.type || 0;
// ref to the collision map
this.collisionMap = me.game.collisionMap;
// to know if our object can break tiles
/**
* Define if an entity can go through breakable tiles<br>
* default value : false<br>
* @public
* @type Boolean
* @name me.ObjectEntity#canBreakTile
*/
this.canBreakTile = false;
/**
* a callback when an entity break a tile<br>
* @public
* @type Function
* @name me.ObjectEntity#onTileBreak
*/
this.onTileBreak = null;
},
/**
* specify the size of the hit box for collision detection<br>
* (allow to have a specific size for each object)<br>
* e.g. : object with resized collision box :<br>
* <img src="me.Rect.colpos.png"/>
* @param {int} x x offset (specify -1 to not change the width)
* @param {int} w width of the hit box
* @param {int} y y offset (specify -1 to not change the height)
* @param {int} h height of the hit box
*/
updateColRect : function(x, w, y, h) {
this.collisionBox.adjustSize(x, w, y, h);
},
/**
* collision detection
* @private
*/
checkCollision : function(obj) {
var res = this.collisionBox.collideVsAABB(obj.collisionBox);
if (res.x != 0 || res.y != 0) {
// notify the object
this.onCollision(res, obj);
// return the type (deprecated)
res.type = this.type;
// return a reference of the colliding object
res.obj = this;
return res;
}
return null;
},
/**
* onCollision Event function<br>
* called by the game manager when the object collide with shtg<br>
* by default, if the object type is Collectable, the destroy function is called
* @param {me.Vector2d} res collision vector
* @param {me.ObjectEntity} obj the other object that hit this object
* @protected
*/
onCollision : function(res, obj) {
// destroy the object if collectable
if (this.collidable
&& (this.type == me.game.COLLECTABLE_OBJECT))
me.game.remove(this);
},
/**
* set the entity default velocity<br>
* note : velocity is by default limited to the same value, see setMaxVelocity if needed<br>
* @param {Int} x velocity on x axis
* @param {Int} y velocity on y axis
* @protected
*/
setVelocity : function(x, y) {
this.accel.x = (x != 0) ? x : this.accel.x;
this.accel.y = (y != 0) ? y : this.accel.y;
// limit by default to the same max value
this.setMaxVelocity(x,y);
},
/**
* cap the entity velocity to the specified value<br>
* @param {Int} x max velocity on x axis
* @param {Int} y max velocity on y axis
* @protected
*/
setMaxVelocity : function(x, y) {
this.maxVel.x = x;
this.maxVel.y = y;
},
/**
* set the entity default friction<br>
* @param {Int} x horizontal friction
* @param {Int} y vertical friction
* @protected
*/
setFriction : function(x, y) {
this.friction.x = x || 0;
this.friction.y = y || 0;
},
/**
* helper function for platform games: <br>
* make the entity move left of right<br>
* @param {Boolean} left will automatically flip horizontally the entity sprite
* @protected
* @example
* if (me.input.isKeyPressed('left'))
* {
* this.doWalk(true);
* }
* else if (me.input.isKeyPressed('right'))
* {
* this.doWalk(false);
* }
*/
doWalk : function(left) {
this.flipX(left);
this.vel.x += (left) ? -this.accel.x * me.timer.tick : this.accel.x * me.timer.tick;
},
/**
* helper function for platform games: <br>
* make the entity move up and down<br>
* only valid is the player is on a ladder
* @param {Boolean} up will automatically flip vertically the entity sprite
* @protected
* @example
* if (me.input.isKeyPressed('up'))
* {
* this.doClimb(true);
* }
* else if (me.input.isKeyPressed('down'))
* {
* this.doClimb(false);
* }
*/
doClimb : function(up) {
// add the player x acceleration to the y velocity
if (this.onladder) {
this.vel.y = (up) ? -this.accel.x * me.timer.tick
: this.accel.x * me.timer.tick;
return true;
}
return false;
},
/**
* helper function for platform games: <br>
* make the entity jump<br>
* @protected
*/
doJump : function() {
// only jump if standing
if (!this.jumping && !this.falling) {
this.vel.y = -this.maxVel.y * me.timer.tick;
this.jumping = true;
return true;