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Improved Oversimplified.GameObject.SimpleMove() by allowing the user to specify what interval of pixels they want to check for collisions instead of each and every collision.

This commit is contained in:
Robbie Antenesse 2016-04-07 18:19:30 -06:00
parent 31a61f6808
commit 2c25adab8b
1 changed files with 10 additions and 4 deletions
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14
Oversimplified.js
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@ -941,14 +941,17 @@ Oversimplified.GameObject.prototype.Clicked = function (mouseClick) {
// Move the object based upon xSpeed and ySpeed, stopping if colliding with solid objects
//
// xSpeed and ySpeed are numbers, and checkCollisions is true or false.
Oversimplified.GameObject.prototype.SimpleMove = function (xSpeed, ySpeed, checkCollisions) {
// xSpeed and ySpeed are numbers, checkCollisions is true or false, and checkEveryXPixels is a number.
//
// Returns true if successfully moved and false if not.
Oversimplified.GameObject.prototype.SimpleMove = function (xSpeed, ySpeed, checkCollisions, checkEveryXPixels) {
checkEveryXPixels = (typeof checkEveryXPixels !== 'undefined') ? checkEveryXPixels : 2;
var collisionLeft = false,
collisionRight = false,
collisionUp = false,
collisionDown = false;
if (checkCollisions) {
for (var vert = 0; vert < this.yBound * 2; vert++) {
for (var vert = 0; vert < this.yBound * 2; vert += checkEveryXPixels) {
var yToCheck = (this.y - this.yBound + vert);
if (!collisionLeft) {
collisionLeft = xSpeed < 0 && Oversimplified.CollisionAtPoint((this.x - this.xBound) + xSpeed, yToCheck);
@ -957,7 +960,7 @@ Oversimplified.GameObject.prototype.SimpleMove = function (xSpeed, ySpeed, check
collisionRight = xSpeed > 0 && Oversimplified.CollisionAtPoint((this.x + this.xBound) + xSpeed, yToCheck);
}
}
for (var hor = 0; hor < this.xBound * 2; hor++) {
for (var hor = 0; hor < this.xBound * 2; hor += checkEveryXPixels) {
var xToCheck = (this.x - this.xBound + hor);
if (!collisionUp) {
collisionUp = ySpeed < 0 && Oversimplified.CollisionAtPoint(xToCheck, (this.y - this.yBound) + ySpeed);
@ -970,6 +973,9 @@ Oversimplified.GameObject.prototype.SimpleMove = function (xSpeed, ySpeed, check
if (!checkCollisions || (!collisionLeft && !collisionRight && !collisionUp && !collisionDown)) {
this.x += xSpeed;
this.y += ySpeed;
return true;
} else {
return false;
}
}