I'm trying to implement a aabb to circle collision.
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Somehow the collision does work as expected. Either they never move at all and "collided" was traced, or they'll continue moving and never collide when I tried swapping values around. Is there something i'm missing in my logic??? My box-box and circle-circle collision are working fine.
i am working on a project that needs some collision detection. i have 7 objects and it should check collide for each others. i looked collision detection kit by Corey O'Neil, but cant figure it out.
View 2 RepliesTrying to do circle circle collisions via math which I'm really having trouble with. One circle (player) just moves from keyboard. The ball reacts to the player. All the code shown is in my players class and I passed in a reference to the ball.
On my enterframe I have:
Code:
var xmov1 = xSpeed;
var ymov1 = ySpeed;
var xmov2 = ballRef.xSpeed;
var ymov2 = ballRef.ySpeed;
[code]....
Perhaps I'll go with a box2d equivalent instead of trying out my own physics shenanigans.
Does anyone know of any tutorial or code example that deals with resolving circle-circle collisions including rotation?
View 2 RepliesI'm developing a game atm, and I need some help on the mathematics/coding of colliding circles (and their change in x/y speed). What i need to know is how to calculate the direction and speed a circle has after colliding with a static (non-moving) circle. I know how to detect a collision between the two, but I'm not sure about the maths I need to give the circle the right speed and direction after the collision
If i do know how far away the two circle-points (in the middle of each) are to each other (in both x and y coords) would it be easy for me to find the new speed and direction of the large circle in the example above? I know that I somehow should use the angles to pretend the circle hits a flat "wall" (as it only hits one point), and then calculate the new speed/direction. My only problem is that I'm not sure how to decide the angle of this flat "wall" and how x and y speeds should change when colliding with a wall that is angled. Does anyone here have any insight, links or tips on how I can du this?
I followed the bit101 tutorial on gravity and now have a movie clip called "ball" (instance name) with an embedded invisible button (so you can throw it all over the place).I also have a movie clip called "block1" (instance name too! what a coincidence, isn't life lovely). I want to make them collide, and make the ball bounce away.
View 1 RepliesHow you'd swap; after storing, _x /_y position values of movie clips on button instances ie. onClick ..... Let's say I had four 4 movies and 3 buttons the (first movie looking like a button but is active so it's not clickable at that point) mc1, mc2, mc3, mc4 when the movie loads they are in that order. When the user clicks mc2 or 3 or 4 it slides into the _x position of mc1, and mc1 slides into the _x pos. where mc2/3/ or 4 just was (they swap).... then the user clicks mc4 or 3 or 1 and it swaps pos. with mc2 and so on.... all this done with a smooth easing transition. An example similar to this is the navigation module on [URL].
View 10 RepliesJust was wondering if anyone had any idea on how you'd swap; after storing, _x /_y position values of movie clips on button instances ie. onClick ..... Let's say I had four 4 movies and 3 buttons the (first movie looking like a button but is active so it's not clickable at that point) mc1, mc2, mc3, mc4 when the movie loads they are in that order.
When the user clicks mc2 or 3 or 4 it slides into the _x position of mc1, and mc1 slides into the _x pos. where mc2/3/ or 4 just was (they swap).... then the user clicks mc4 or 3 or 1 and it swaps pos. with mc2 and so on.... all this done with a smooth easing transistion.
most efficient way to test for a collision between a circle and a rectangle?
View 3 RepliesI have a whole heap of circles which are user created and they all bounce off one another. Generally it works fine but occasionally two balls join together and sort of .. orbit each other.
my collision code is this: (it's within two loops going through an array of movie clips, where mc1 is the current movie clip in the first loop and mc2 is the current movie clip within the second loop)
ActionScript Code:
dx = mc1._x-mc2._x
dy = mc1._y-mc2._y
[Code].....
With AS3 I managed to resolve the problem I said in the thread, but now I face a new problem.If you hit the wall, it will register a collision as it should. Goes the same for the exit. But if you look to the upper left, there's a rotating rectangle. If you hit the rotating rectangle, it will register a collision IF YOUR CURSOR MOVED.That's right, if you freeze the cursor in place as the rectangle comes sweeping in, it WILL NOT register a collision, meaning if it were a maze game, people could cheat by just staying still.I forgot, here's the code:
Code:
stop();
stage.addEventListener(MouseEvent.MOUSE_MOVE, detectHits);
[code]......
I'm having a little problem with collision detection. I'm currently with very simple game, where the only thing that is off is the collision.I tried with hittestobject and (as I found) it checks for the outer layer (my objects are a circle, and a weird star), so this method was of no use to me. Then I tried with hittestpoint, and I found that it checks for the center of the objects, so game over happens only where the center of an enemy touch the center of my character.I know that I must have something missing and I found a lot of guides but all of them were with squares or with static objects
View 3 RepliesI have three objects in the main scene (so far), one of them is draggable (up and down only), then the animated one that moves downwards and the start button (activates the animation). So I've been trying to figure out how to script the collision detection for the first two? The collision should take place not because I dragged the slider onto the animated block, but because the falling piece hits the slider after I pressed the start button.
View 4 RepliesI am creating a scheduling application that shows projects (wrapped within a canvas) on a 2 week calendar timeline.If the user decides to move a project over by a day, i need to check and see if the moving project would then overlap with any other existing projects. If it does, one of the two projects would need to move down the screen along the y axis until the two projects no longer overlap.I've created a function that loops through a repeater item which is used to create the projects... the end result of this function is an arrayCollection that holds:
0. the id number within the repeater
1. the project title
2. x coordinate
3. y coordinate
4. the width of the project
5. the height of the project
I have also created a function that takes the two objects within the array collection and determines if they're overlapping.I can not, however, figure out a working loop that goes through the array collection, compares each item within it, checks to see if they overlap, moves the project if they do overlap, and then continues onto the next project.
Also, I need to make sure that moving one project will not make it overlap with another.I ended up having to reset each elements y value to 0 each time any project is moved and then re-evaluating whether or not they collide.
I am trying to animate the circle to follow the cursor point. Its working fine, but when you move the cursor little faster the animation struck.
import flash.events.MouseEvent;import fl.transitions.Tween;import fl.transitions.*;import fl.transitions.easing.*;
var moveXY:Number;var speed:Number = 1;
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I have a circle (bounding circle) offset from the centre point of my entity and I'm looking on how to move that circle around the entity as it rotates so that it's always in the same spot of the character.For example,say I have a bounding circle for the front of a car, when the car turns, that bounding circle needs to turn to So I have two points: position which is the position of the entity's centre point and offset which is the offset of the circle from that position. This assumes an angle of 0.
So if my car is facing 0 degrees: position (150, 150) and offset (50, 0) then the bounding circle would be at 200, 150.Now if I rotated the car 90 degrees, the bounding circle should be at position 150, 200.This is what I have now:
var differenceX : Number = _centre.x - _offset.x;
var differenceY : Number = _centre.y - _offset.y;
var rotatedX : Number = differenceX * Math.cos(_angle);[code]........But it's giving me these long ovals and now a perfect circle.
I am trying to move a line around in a circle, around a fixed point (not 0,0). As in the way a clock hand moves around with one end at the middle and the other end traveling in a circle. I tried the rotation function but that moves the entire object around (0,0), I need the point in the middle stationary and at a non (0,0) point.
View 9 RepliesRecently I came across a site showing a no. of images (probably 8 - 10) rotating around an invisible eclipse. When we put mouse-pointer over any of the images it's tip shows a linked site's name and if clicked that particular site opens up. Only one image is displayed perfectly which is on the top while rotating, while other remain blurred out not clickable. How to create such effect as I need to get it implemented.
View 1 RepliesAs the title says: Stop object from moving further when collision occurs.
Right now I'm trying to make a sliding puzzle. So far I have a block which I can click and drag around, and a few walls which are the boundaries. What I'm trying to do is make an area where the block can slide within the boundaries. So when you try to drag the block into an direction it will stop, whether you got mouse_down or mouse_up. My script so far
Code:
stop();
//Sliding Blocks
MCBlock1.addEventListener(MouseEvent.MOUSE_DOWN, pickUp);
[Code]....
Also I need to use a lot of boundaries, so if there's a way to apply this script easily to several objects
I have a circle drawn on the screen, wherein I add a moving object. I want it to keep inside. My strategy is to calculate the circle's radius and compare it with the distance the moving object is off its center. I beleive it's the proper solution. However, I'm having a problem with letting Flash know when the running guy should stop, so he doesn't leave the circle and ruin all the fun. Here's the code I'm using (it's not working of course):
function moveTheCreaturesRightwards(event:Event)
{
if(maleMovingRight == true)
{
[Code]....
The line: rayMale.width = maleRadius.width; was added when nothing else had seemed to be working
has anyone found an AS3 source/Maths-lib etc that covers not just simple collision tests but swept collision tests (at least swept AABB/circle tests) for fast moving objects? I had a quick look at flixel but even that does not seem to have sweep tests for fast moving objects.
View 2 RepliesI have an object called point that I can move around the screen with my mouse. This object has a vector mapped through it (_v1) using the center of the stage and "point"s x,y location in order to draw the vector (note all of this is working fine). My problem is occurring when I set up was a button that simply sets a value to true if you press it. The idea behind this button is that when pressed, whatever location "point" is at, it will move 1 degree clockwise in a circle around the center of the stage (this is all happening in the frameHandler so I can keep clicking the button to make it continue around the stage).
The code I am using is based in an if statement listed below:
if(clockwisePressed) {
var v1angle:Number = _v1.angle;
v1angle++; //increase the angle by 1 degree
if(v1angle>180) {
v1angle -= 360; }
[Code] .....
So what is happening here is that clockwisePressed has been set to true so this fires off. My vector (_v1) is set up to tell me the angle (already converted from radians to degrees) but it's a read-only value. So I assign it (_v1.angle) to v1angle so I can mess with it and increase it by 1 so I'm moving clockwise around the center of the stage. Then I just check to make sure that it falls into a range between -180 and 180 (if I trace _v1.angle around the stage, 0 degrees is to the left, 90 degrees is straight up, 180 degrees is to the right, and -90 is straight down). Now using the formula I derived from this thread but converted to work with 0 degrees pointing to the left and the value for Y going up the further down the stage you go, I came up with
x = centerX - radius * cos(angle)
y = centerY - radius * sin(angle)
Now when I make a sample chart on paper and use these values on my calculator, this works like a charm. If I plug in an angle, the radius, and center I get a point right on my circle I draw on a sheet of graph paper. However, when I actually try this in flash, the "point" jumps all over the stage. (Note that _v1.m is just the magnitude of the vector between the center of the stage and "point" which is the same as the radius). So I trace everything and the values for cos and sin don't seem to be coming out right. For example, if my angle is -1.9581 and I take the cos of that on my calculator I get something along the lines of 0.9994 but flash traces Math.cos(angle) to be -0.3777. Isn't using Math.cos(-1.9581) the same as putting -1.9581 into your calculator and hitting cos?
Below is the corrected code that works:
if(clockwisePressed) {
var v1RadAngle:Number = Math.atan2(_v1.vy, _v1.vx); //get angle in radians
v1RadAngle += 0.0174; //increase the angle by ~1 degree more or less
//Now just move the crosshair and get it ready to be redrawn
point.x = centerX - _v1.m * Math.cos(v1RadAngle); //_v1.m = radius
point.y = centerY - _v1.m * Math.sin(v1RadAngle);
clockwisePressed = false; //remove button pressed boolean
}
I have a circle and a big square. The circle can be moved using the keyboard. I want the square to act as an obstacle, so the circle cannot be moved into it and the circle stops when it hits it, just like a if i were to try to walk into a building. Is there an easy way to do this?
View 7 RepliesI want the final result to be a stage with a certain number of circle MC's moving around. I have made the circle MC, and added the AS so that it will start at a random point with a random color, then start moving around randomly. I want to make it so that In the beginning the document will duplicate the movie clip x amount of times, using a for loop. I want to then have all the new circles move around, and when two circles hit each other, they will dissappear, using the removeclip function. You can only use this on duplicated movieclips though, so how would i make all the circles duplicated? Is there a way to duplicate the original movieclip x amount of times then delete it? Or is there a way to remove the original after it is in a collision? Also I don't know how to do the collision detection. I am thinking of using a hittest, but would I just do it with a for loop? Is there a way so that if an MC hits any other MC?
View 3 RepliesIn AS3 is there an easy way for collisions to take place between a moving circle and a rectangle object. A moving circle has a direction and you need to know how it collides with an object rather than knowing it just hits. In .net you use a points test where you test several points around a circle to see what hits an object and then you can work out what direction it will bounce off.
View 2 RepliesI'm trying to move an object along circlular motion guide dynamically using two buttons -- a left button, when pressed down, will move the object counter clockwise, and the right button clockwise.
View 2 RepliesI have a circle and a square on the stage. When you click on the square the circle will go to "circle._x = 300" when the circle is at 300 I want to make it when you click on the square the circle will go "circle._x = 45"
Code:
moveCircle = function () {
circle._x = 300;
if (circle._x >= 300) {
circle._x = 45;
}} square.onRelease = function() {
moveCircle();
trace(circle._x + "is the position of the circle");
}
I'm moving this little red box along the x axis. It just moves w/ the mouse but it moves off the movie clip area, i want to be able to set the left and right boundries. Heres my code.
mc_movingBox.onEnterFrame = function() {
var xMouse = _root._xmouse;
f(Math.abs(xMouse - this._x) < 1) {
[code].....
I'm moving this little red box along the x axis. It just moves w/ the mouse but it moves off the movie clip area, I want to be able to set the left and right boundaries.
Heres my code.
mc_movingBox.onEnterFrame = function() {
var xMouse = _root._xmouse;
if(Math.abs(xMouse - this._x) < 1) {
this._x = xMouse;
} else {
this._x -= (this._x-xMouse) / 6;
}}
I'm moving this little red box along the x axis. It just moves w/ the mouse but it moves off the movie clip area, i want to be able to set the left and right boundries. Heres my code..
mc_movingBox.onEnterFrame = function() {
var xMouse = _root._xmouse;
if(Math.abs(xMouse - this._x) < 1) {
[Code].....