Hey guys, I’ve made some huge progress because of Qwerbers collision tutorial.
I’ve got this last issue to deal with, I have no idea whats causing it.
My character is fine when colliding with a single tile, but colliding with two tiles at once and it goes haywire.
If its colliding with “ground” aka tile from above, than its y rapidly changes between being perfectly on top of the tile and being just above it.
If its colliding with “wall” aka tile from left or right, same but with its x respectively.
Everything is working besides that though, I’m actually quite proud.
Works with arrays of tiles (besides this issue obviously) and its x isn’t stuck if moving left or right while colliding with “ground” and vice versa.
private function updateCollisions(){
for(var i in ground_a){
squareX2 = ground_a[i].x;
squareY2 = ground_a[i].y;
squareWidth2 = ground_a[i].width;
squareHeight2 = ground_a[i].height;
solveCollision();
}
}
public function solveCollision() {
var velocityY = squareY - prevSq1Y;
var velocityX = squareX - prevSq1X;
var distanceX1;
var distanceY1;
var distanceX2;
var distanceY2;
if(velocityX < 0){
distanceX1 = squareX2 + squareWidth2 - prevSq1X;
distanceX2 = squareX2 - prevSq1X - squareWidth;
} else {
distanceX1 = squareX2 - prevSq1X - squareWidth;
distanceX2 = squareX2 + squareWidth2 - prevSq1X;
}
if(velocityY < 0){
distanceY1 = squareY2 + squareHeight2 - prevSq1Y;
distanceY2 = squareY2 - prevSq1Y - squareHeight;
} else {
distanceY1 = squareY2 - prevSq1Y - squareHeight;
distanceY2 = squareY2 + squareHeight2 - prevSq1Y;
}
var timeX = distanceX1/velocityX;
var timeY = distanceY1/velocityY;
var actualTime = Math.max(timeX,timeY);
var disjointTimeX = distanceX2/velocityX;
var disjointTimeY = distanceY2/velocityY;
var actualDisjointTime = Math.min(disjointTimeX, disjointTimeY);
if (timeX < 0 && timeY < 0){
//trace("COLLISION FOUND UNWORTHY");
return;
}
if(timeX > 1 || timeY > 1){
//trace("COLLISION FOUND UNWORTHY");
return;
}
if(actualTime < actualDisjointTime){
//trace("COLLISION FOUND WORTHY~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~>>>>>");
player.y = player.y - ((1-actualTime) * velocityY);
if(timeX < 1 && timeX > 0){
player.x = player.x - ((1-actualTime) * velocityX);
}
}
}
