We need something to create challenge in the game. Alien jelly monsters are the obvious choice. Lots of them. Here's a sprite sheet for the monsters:
Right click and save to the
data/texture folder in our project as “monster.png”.
Create a graphic from the sprite sheet in the config:
[MonsterGraphic] Texture = monster.png TextureOrigin = (0, 0, 0) ;required by the animation system for sizing. TextureSize = (32, 32, 0) Pivot = center
We need an object:
[MonsterObject] Graphic = MonsterGraphic AnimationSet = MonsterAnimationSet Position = (-310, -210, 0) Scale = 2.0
Then to define the animation set and the one animation we need:
[MonsterAnimationSet] Texture = monster.png KeyDuration = 0.1 FrameSize = (32, 32, 0) MonsterWobbleAnim = -1 ;use the entire sheet StartAnim = MonsterWobbleAnim MonsterWobbleAnim-> = MonsterWobbleAnim Pivot = center
Just so you can see the monster working… add a MonsterObject to the Scene childlist:
[Scene] ChildList = PlatformObject # MiddlePlatformObject # TopLeftPlatformObject # TopPlatformObject # TopRightPlatformObject # StarObject # MonsterObject
Run the game and you'll see a monster wobbling in the top left hand corner of the screen:
We need more than one monster, very soon we'll make lots of them drop out of the sky.
Last job is to give the monster a body and ensure he collides with platforms, bullets, and our hero:
[MonsterObject] Graphic = MonsterGraphic AnimationSet = MonsterAnimationSet Position = (-310, -210, 0) Scale = 2.0 Body = MonsterBody [MonsterBody] Dynamic = true PartList = MonsterBodyPart [MonsterBodyPart] Type = box Solid = true SelfFlags = monster CheckMask = hero # platforms # bullet
monster to the
PlatformBody so that collisions work on both object types:
[PlatformBodyPart] Type = box Solid = true SelfFlags = platforms CheckMask = hero # monster
Run it again and the monster should drop down onto a platform.
Next: Part 17 – Timeline Tracks.