Below is my current code and i am trying to get my ball to bounce off with the proper angle of refraction based on the random angled walls and direction of the ball…My problem is I have only taken a basic physics class and know the equation “angle of incidence = angle of refraction” also, this is my first year in as3 so my coding is rather crude. The angle seems to be off…the problem is with the code “Bullet.hitTestObject(myblockadeHolder[t])” Thanks guys.
stage.addEventListener(Event.ENTER_FRAME,rotate);
var _trueRotation:Number;
var _dx:Number;
var _dy:Number;
function rotate (e:Event){
// calculate rotation based on mouse X & Y
_dx = Turret.x - stage.mouseX;
_dy = Turret.y - stage.mouseY;
// which way to rotate
var rotateTo:Number = getDegrees(getRadians(_dx, _dy));
// keep rotation positive, between 0 and 360 degrees
if (rotateTo > Turret.rotation + 180) rotateTo -= 360;
if (rotateTo < Turret.rotation - 180) rotateTo += 360;
// ease rotation
_trueRotation = (rotateTo - Turret.rotation - 90) / 3;
// update rotation
Turret.rotation += _trueRotation;
}
//Turret Rotation
//Create an array to hold multiple sprites
var mySpriteHolder:Array = [];
//Create a counter to keep track of the number of sprites
var lbCounter:int = 0;
//Maximum number of sprites on the canvas
var maxLB:int = 1;
//Keypress Code
stage.addEventListener(MouseEvent.CLICK, dropBullet);
//Function for the mouse event to fire bullet
function dropBullet(evt:MouseEvent):void{
var bcos:Number = Math.cos((Turret.rotation - 90) * Math.PI / 180);
var bsin:Number = Math.sin((Turret.rotation - 90) * Math.PI / 180);
//starting x and y
var startx:int = Turret.x + (70 * bcos);
var starty:int = Turret.y + (70 * bsin);
//calculates where the bullet needs to go by aiming in front of the gun
var endx:int = Turret.x + (100 * bcos);
var endy:int = Turret.y + (100 * bsin);
var Bullet:MovieClip = new bullet();
Bullet.x = startx;
Bullet.y = starty;
Bullet.xspeed = (endx - startx)/5;
Bullet.yspeed = (endy - starty)/5;
mySpriteHolder.push(Bullet);
stage.addChild(Bullet);
//this calls the move down function
stage.addEventListener(Event.ENTER_FRAME,BulletFire);
}
//Function to shoot bullet
var Points:Number = 0;
var Life:Number = 100;
stage.addEventListener(Event.ENTER_FRAME, TextCounter);
function BulletFire(evt:Event):void{
var Bullet:MovieClip;
//Use a for loop to move the Bullets
for(var i:int=mySpriteHolder.length-1; i>=0; i--){
Bullet = mySpriteHolder[i];
//Bounds Collision
if(Bullet.hitTestObject(Up)){
Bullet.yspeed*=-1;
}
if(Bullet.hitTestObject(Lower)){
Bullet.yspeed*=-1;
}
if(Bullet.hitTestObject(Left)){
Bullet.xspeed*=-1;
}
if(Bullet.hitTestObject(Right)){
Bullet.xspeed*=-1;
}
if(Bullet.hitTestObject(Tank)){
stage.removeChild(Bullet);
mySpriteHolder.splice(i,1);
lbCounter --;
Life -= 10;
}
//Blockade Collision
for(var t in myBlockadeHolder){
if(Bullet.hitTestObject(myBlockadeHolder[t])){
_trueRotation*=2
var newAngle = (180 - (_trueRotation) - (smallangle))*-1;
var newXspeed = Math.cos(newAngle);
var newYspeed = Math.sin(newAngle);
Bullet.xspeed = newXspeed+2.5;
Bullet.yspeed = newYspeed+2.5;
}
}
//Target Collision
for(var c in mytargetHolder){
if(Bullet.hitTestObject(mytargetHolder[c])){
stage.removeChild(Bullet);
mySpriteHolder.splice(i,1);
lbCounter --;
Points += 10;
mytargetHolder[c].y = Math.random()*380 + 10;
mytargetHolder[c].x = Math.random()*380 + 10;
while(mytargetHolder[c].hitTestObject(Turret)){
mytargetHolder[c].y = Math.random()*380 + 10;
mytargetHolder[c].x = Math.random()*380 + 10;
}
}
for(var a in mytargetHolder){
for(var s in mytargetHolder){
while(mytargetHolder[a].hitTestObject(mytargetHolder[s])&& a!=s){
mytargetHolder[a].y = Math.random()*380 + 10;
mytargetHolder[a].x = Math.random()*380 + 10;
}
}
for(var g in myBlockadeHolder){
while(mytargetHolder[a].hitTestObject(myBlockadeHolder[g])&& a!=g){
mytargetHolder[a].y = Math.random()*380 + 10;
mytargetHolder[a].x = Math.random()*380 + 10;
}
}
}
}
Bullet.y += Bullet.yspeed;
Bullet.x += Bullet.xspeed;
}
}//Bullet Code
stage.addEventListener(Event.ENTER_FRAME, HealthCheck);
function HealthCheck(e:Event):void{
if(Life<=0){
stage.removeEventListener(MouseEvent.CLICK, dropBullet);
stage.removeEventListener(Event.ENTER_FRAME, BulletFire);
stage.removeEventListener(Event.ENTER_FRAME, droptarget);
stage.removeEventListener(Event.ENTER_FRAME, dropblockade);
}
}//Health Code
//variables for blockade
var myblockadeSprite:Sprite;
//blockade is the linkage name in the library
var blockade:Blockade;
//Create an array to hold multiple sprites
var myBlockadeHolder:Array = new Array();
//Create a counter to keep track of the number of sprites
var LbCounter:int = 0;
//Maximum number of sprites on the canvas
var maxlb:int = 6;
//Keypress Code
stage.addEventListener(Event.ENTER_FRAME, dropblockade);
//Function for the mouse event to fire blockade
function dropblockade(evt:Event):void{
for(var i:int=0;i<maxlb; i++){
//PLACE DO LOOP INSIDE TO GENERATE EMPTY IN RANDOM COORDS
//add the blockades to the canvas
myblockadeSprite = new Sprite();
stage.addChild(myblockadeSprite);
//Get the actual picture from the library
blockade = new Blockade();
myblockadeSprite.addChild(blockade);
//Going to load up the array with the sprites
myBlockadeHolder[i] = myblockadeSprite;
myBlockadeHolder[i].y = Math.random()*390 + 10;
myBlockadeHolder[i].x = Math.random()*390 + 10;
myBlockadeHolder[i].rotation = Math.random()*360;
while(myBlockadeHolder[i].hitTestObject(Tank)){
myBlockadeHolder[i].y = Math.random()*390 + 10;
myBlockadeHolder[i].x = Math.random()*390 + 10;
}
}
for(var t:int=0;t<maxlb; t++){
for(var d:int=0;d<maxlb; d++){
while(myBlockadeHolder[t].hitTestObject(myBlockadeHolder[d])&& t!=d){
myBlockadeHolder[t].y = Math.random()*390 + 10;
myBlockadeHolder[t].x = Math.random()*390 + 10;
}
}
}
stage.removeEventListener(Event.ENTER_FRAME, dropblockade);
}//Blockade Code
//variables for target
var mytargetSprite:Sprite;
//target is the linkage name in the library
var target:Target;
//Create an array to hold multiple sprites
var mytargetHolder:Array = new Array();
//Create a counter to keep track of the number of sprites
var TargetCounter:int = 0;
//Maximum number of sprites on the canvas
var maxtrgs:int = 3;
//Keypress Code
stage.addEventListener(Event.ENTER_FRAME, droptarget);
function droptarget(evt:Event):void{
for(var i:int=0;i<maxtrgs; i++){
//PLACE DO LOOP INSIDE TO GENERATE EMPTY IN RANDOM COORDS
//add the targets to the canvas
mytargetSprite = new Sprite();
stage.addChild(mytargetSprite);
//Get the actual picture from the library
target = new Target();
mytargetSprite.addChild(target);
//Going to load up the array with the sprites
mytargetHolder[i] = mytargetSprite;
mytargetHolder[i].y = Math.random()*390 + 10;
mytargetHolder[i].x = Math.random()*390 + 10;
while(mytargetHolder[i].hitTestObject(Tank)){
mytargetHolder[i].y = Math.random()*390 + 10;
mytargetHolder[i].x = Math.random()*390 + 10;
}
}
for(var t:int=0;t<maxtrgs; t++){
for(var d:int=0;d<maxtrgs; d++){
while(mytargetHolder[t].hitTestObject(mytargetHolder[d])&& t!=d){
mytargetHolder[t].y = Math.random()*390 + 10;
mytargetHolder[t].x = Math.random()*390 + 10;
}
}
for(var w:int=0;w<maxtrgs; w++){
while(mytargetHolder[t].hitTestObject(myBlockadeHolder[w])&& t!=w){
mytargetHolder[t].y = Math.random()*390 + 10;
mytargetHolder[t].x = Math.random()*390 + 10;
}
}
}
stage.removeEventListener(Event.ENTER_FRAME, droptarget);
}//Target Code
function getRadians(delta_x:Number, delta_y:Number):Number{
var r:Number = Math.atan2(delta_y, delta_x);
if (delta_y < 0){
r += (2 * Math.PI);
}
return r;
}
/**
* Get degrees
* @param radians Takes radians
* @return Returns degrees
*/
function getDegrees(radians:Number):Number{
return Math.floor(radians/(Math.PI/180));
}
function TextCounter(e:Event):void{
PointCounter.text = String(Points);
LifeCounter.text = String(Life);
}
I’m not really a physics guy but I can refer you to an article/tutorial that will most likely help you solve this issue. If it does, please post your fixed code as an answer because that’s a better/more direct answer for this question. If not, hopefully someone else will come along with a better answer:
http://blog.generalrelativity.org/actionscript-30/dynamic-circlecircle-collision-detection-in-actionscript-3/