I imported a cube mesh that contains four smaller sub-cubes.
The mesh also contains an animation that pushes the smaller cubes out of the big one. When this is done, one of the small cubes "splits" again (it's not really splitting - it just pushes four children out again).
I'd like to trigger these animations when the user clicks on the big cube.The animation was initially exported as one clip but I cut it in half so that I can either trigger the first or the second split.
I attached a Box Collider to the big cube to be able to get an OnMouseDown event and from there I pass an int parameter to my AnimationController that starts the appropriate animation:
public class ClickToAnimate : MonoBehaviour {
private Animator _animator;
private int _clicks = 1;
void Start()
{
_animator = GetComponent<Animator>();
}
void OnMouseDown()
{
_animator.SetInteger("Clicks", _clicks);
if (_clicks == 3)
{
_clicks = 1;
}
else
{
_clicks++;
}
}
}
The state switching works fine but when I transition from FirstSplit to SecondSplit, the first animation is reverted so that the four medium cubes are driven back in the big cube before the second animation is played.
I tried enabling "Apply Root Motion" but that doesn't help (probably because the big cube is never actually moving?). So how can I "chain" these animations without resetting them in each step? Are my general ideas regarding the AnimationController and animation splitting correct to handle this and what am I missing?
Related
I have a character made of up child objects that are animated using Unity3D's animation system.
While the player is walking, I can programmatically move the hand object up to catch a ball using the following code.
hand.position.y = ball.transform.position.y;
I need the hand object to go back to following the walk animation after it touches the ball, but instead it just stays at the exact position since it was set.
You want to use inverse kinematics and let Unity do the work of figuring out positioning for you. Here's a quick-and-dirty (untested) example for catching a ball (it's in C#, but it should be pretty similar for UnityScript):
// in a script on the same GameObject as your animation controller
bool isCatching;
Transform ball;
void OnAnimatorIK (int layer) {
if (isCatching) {
// set position and rotation weights for your catching hand
animator.SetIKPosition(AvatarIKGoal.RightHand, ball.position);
animator.SetIKRotation(AvatarIKGoal.RightHand, ball.rotation);
} else {
// return your position and rotation weights back to their defaults (probably 0f?)
}
}
You'll need to do some work (possibly raycasting or just checking distance and direction) to determine when to set the isCatching flag to true, and you'll want to play with the weights for position and rotation to make it look natural. The IK manual entry has more detailed information.
In my game, I have a ball and ground. The ball is falling and collides with the ground.
But how can I check if the ball has collided? I've added a script to the ball, and got the following code:
void OnCollisionEnter (Collision collisionInfo)
{
print ("collision!");
Destroy(this);
}
Problem is that nothing happens, am I using the wrong event? Ultimately I would want to trigger an animation.
Your code would work if you were using 3d colliders. However, since you're using 2d, there's a separate event called OnCollisionEnter2D, so just change your event to this:
void OnCollisionEnter2D (Collision2D collisionInfo)
{
print ("collision!");
Destroy(this);
}
I have some images/sprites/buttons (i tried them all :)) scrolling/moving on the stage. The user has to tap them to remove them.
The problem is that the touchevent does not match the position of the image.
The faster the touchable sprites move, the further the distance between the touch and the actual image. i.e.:
a image is moving across the screen with 20px/frame:
Touching the image triggers nothing, touching 20 before it triggers a touch on the image.
when image is not moving, this doesn't happen. It seems that the image is already moved internally, but not yet drawn to the screen, but thats just a wild guess. The example below uses a button, but the same goes for an image. I"ll provide a short example of the code, but i guess its pretty straightforward what i'm trying to do.
private var _image:Button;
protected function init():void {
//create pickup image
_image = new Button(assets.getTexture("button"));
_image.scaleWhenDown = 1;
_image.addEventListener(Event.TRIGGERED, onClick_image);
addChild(_image);
//listen to touch event (not used, but example for touch on image instead of button
//touchable = true;
//addEventListener(TouchEvent.TOUCH, onTouch_image);
}
private function onEnter_frame(e:Event):void {
_image.x -= 20;
}
I'm trying to animate sprites along a path in Three.js using Tween.js by chaining the animations in order to have something like this :
----#----#----#----#----#---- etc
Every sprite has its own tween animation, and I just delay each tween animation at the beginning. Each sprite has in fact N animations along the path (that is not a straight line) and I chain them to have a loop effect.
Everything goes well if the FPS is perfectly stable, but my problem is that if at some point I have a FPS drop, the animations of the different sprites are not in sync anymore, and the space between sprites is not equal anymore. I potentially end up with something like this :
---#--#----#-#-#-----#--- etc
I was wondering if there is a better approach for this, like having only one tween animation for all the sprites, but I don't know how to introduce the offset between each sprite on many line segments.
I cannot post the exact code has it is part of a bigger app, and won't be usable as is, but it looks like this :
// create animations
for each (sprite) {
for each (segment) {
var currentAnimation = new TWEEN.Tween(sprite.position).to({
x : segment.endpoint.x,
y : segment.endpoint.y,
z : segment.endpoint.z
}, animationTime).easing(TWEEN.Easing.Linear.None);
currentAnimation.delay(delayTime * currentSpriteNumber);
previousAnimation.chain(currentAnimation);
}
lastAnimation.chain(firstAnimation);
lastAnimation.onComplete(onEachSpriteAnimationCompleted);
}
// start the animations
for each (sprite) {
spriteFirstAnimation.start();
}
// to remove the delay when each sprite animation has made one loop,
// and instantly replace the sprite at the beginning of the path
// (my paths are not closed)
var onEachSpriteAnimationCompleted = function() {
sprite.position.set(starting position);
for each (sprite animation) {
animation.delay(0);
}
}
G'day all,
In short, I'm using a for loop to create a bunch of identical sprites that I want to bounce around the screen. The problem is how do I write a collision detection process for the sprites. I have used the process of placing rectangles around sprites and using the .intersects method for rectangles but in that case I created each sprite separately and could identify each one uniquely. Now I have a bunch of sprites but no apparent way to pick one from another.
In detail, if I create an object called Bouncer.cs and give it the movement instructions in it's update() method then create a bunch of sprites using this in Game.cs:
for (int i = 1; i < 5; ++i)
{
Vector2 position = new Vector2(i * 50, i * 50);
Vector2 direction = new Vector2(i * 10, i * 10);
Vector2 velocity = new Vector2(10);
Components.Add(new Bouncer(this, position, direction, velocity, i));
}
base.Initialize();
I can draw a rectangle around each one using:
foreach (Bouncer component1 in Components)
{
Bouncer thing = (Bouncer)component1;
Rectangle thingRectangle;
thingRectangle = new Rectangle((int)thing.position.X, (int)thing.position.Y, thing.sprite.Width, thing.sprite.Height);
But now, how do I check for a collision? I can hardly use:
if (thingRectangle.Intersects(thingRectangle))
I should point out I'm a teacher by trade and play with coding to keep my brain from turning to mush. Recently I have been working with Python and with Python I could just put all the sprites into a list:
sprites[];
Then I could simply refer to each as sprite[1] or sprite[2] or whatever its index in the list is. Does XNA have something like this?
Please let me know if any more code needs to be posted.
Thanks,
Andrew.
One solution, which I use in my game engine, is to have a Logic code run inside the objects for every game Update, ie. every frame. It seems you already do this, according to the variable names, which indicate you run some physics code in the objects to update their positions.
You might also want to create the collision rectangle inside the Bouncer's constructor so it's more accessible and you make good use of object oriented programming, maybe even make it an accessor, so you can make it update every time you call it instead of manually updating the bounding/collision box. For example:
public Rectangle #BoundingBox {
get { return new Rectangle(_Position.X, _Position.Y, width, height); }
}
Whichever way works, but the collision checks can be run inside the Bouncer object. You can either make the reference list of the Bouncer objects static or pass it to the objects itself. The code for collisions is very simply:
foreach(Bouncer bouncer in Components) //Components can be a static List or you can pass it on in the constructor of the Bouncer object
{
if (bouncer.BoundingBox.Intersects(this.BoundingBox))
{
//they collided
}
}