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Added Game core loop stepping support. Super-useful for debugging, and helped me track down the issue with jittery physics collision. Double-win!

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This commit is contained in:
photonstorm
2014-01-29 17:10:13 +00:00
parent d51a37211c
commit 651858372c
25 changed files with 1268 additions and 438 deletions
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src/geom/Line.js
+67 -61
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@@ -70,11 +70,9 @@ Phaser.Line.prototype = {
},
/**
* Checks for intersection between two lines.
* If asSegment is true it will check for segment intersection.
* If asSegment is false it will check for line intersection.
* Checks for intersection between this line and another Line.
* If asSegment is true it will check for segment intersection. If asSegment is false it will check for line intersection.
* Returns the intersection segment of AB and EF as a Point, or null if there is no intersection.
* Adapted from code by Keith Hair
*
* @method Phaser.Line#intersects
* @param {Phaser.Line} line - The line to check against this one.
@@ -84,7 +82,7 @@ Phaser.Line.prototype = {
*/
intersects: function (line, asSegment, result) {
return Phaser.Line.intersects(this, line, asSegment, result);
return Phaser.Line.intersectsPoints(this.start, this.end, line.start, line.end, asSegment, result);
},
@@ -173,6 +171,69 @@ Object.defineProperty(Phaser.Line.prototype, "perpSlope", {
});
/**
* Checks for intersection between two lines as defined by the given start and end points.
* If asSegment is true it will check for line segment intersection. If asSegment is false it will check for line intersection.
* Returns the intersection segment of AB and EF as a Point, or null if there is no intersection.
* Adapted from code by Keith Hair
*
* @method Phaser.Line.intersects
* @param {Phaser.Point} a - The start of the first Line to be checked.
* @param {Phaser.Point} b - The end of the first line to be checked.
* @param {Phaser.Point} e - The start of the second Line to be checked.
* @param {Phaser.Point} f - The end of the second line to be checked.
* @param {boolean} [asSegment=true] - If true it will check for segment intersection, otherwise full line intersection.
* @param {Phaser.Point} [result] - A Point object to store the result in, if not given a new one will be created.
* @return {Phaser.Point} The intersection segment of the two lines as a Point, or null if there is no intersection.
*/
Phaser.Line.intersectsPoints = function (a, b, e, f, asSegment, result) {
if (typeof asSegment === 'undefined') { asSegment = true; }
if (typeof result === 'undefined') { result = new Phaser.Point(); }
var a1 = b.y - a.y;
var a2 = f.y - e.y;
var b1 = a.x - b.x;
var b2 = e.x - f.x;
var c1 = (b.x * a.y) - (a.x * b.y);
var c2 = (f.x * e.y) - (e.x * f.y);
var denom = (a1 * b2) - (a2 * b1);
if (denom === 0)
{
return null;
}
result.x = ((b1 * c2) - (b2 * c1)) / denom;
result.y = ((a2 * c1) - (a1 * c2)) / denom;
if (asSegment)
{
if (Math.pow((result.x - b.x) + (result.y - b.y), 2) > Math.pow((a.x - b.x) + (a.y - b.y), 2))
{
return null;
}
if (Math.pow((result.x - a.x) + (result.y - a.y), 2) > Math.pow((a.x - b.x) + (a.y - b.y), 2))
{
return null;
}
if (Math.pow((result.x - f.x) + (result.y - f.y), 2) > Math.pow((e.x - f.x) + (e.y - f.y), 2))
{
return null;
}
if (Math.pow((result.x - e.x) + (result.y - e.y), 2) > Math.pow((e.x - f.x) + (e.y - f.y), 2))
{
return null;
}
}
return result;
};
/**
* Checks for intersection between two lines.
* If asSegment is true it will check for segment intersection.
@@ -189,61 +250,6 @@ Object.defineProperty(Phaser.Line.prototype, "perpSlope", {
*/
Phaser.Line.intersects = function (a, b, asSegment, result) {
if (typeof asSegment === 'undefined') { asSegment = true; }
if (typeof result === 'undefined') { result = new Phaser.Point(); }
// var a1 = B.y - A.y;
// var a2 = F.y - E.y;
// var b1 = A.x - B.x;
// var b2 = E.x - F.x;
// var c1 = (B.x * A.y) - (A.x * B.y);
// var c2 = (F.x * E.y) - (E.x * F.y);
// var denom = (a1 * b2) - (a2 * b1);
// A = a.start
// B = a.end
// E = b.start
// F = b.end
var a1 = a.end.y - a.start.y;
var a2 = b.end.y - b.start.y;
var b1 = a.start.x - a.end.x;
var b2 = b.start.x - b.end.x;
var c1 = (a.end.x * a.start.y) - (a.start.x * a.end.y);
var c2 = (b.end.x * b.start.y) - (b.start.x * b.end.y);
var denom = (a1 * b2) - (a2 * b1);
if (denom === 0)
{
return null;
}
result.x = ((b1 * c2) - (b2 * c1)) / denom;
result.y = ((a2 * c1) - (a1 * c2)) / denom;
if (asSegment)
{
if (Math.pow((result.x - a.end.x) + (result.y - a.end.y), 2) > Math.pow((a.start.x - a.end.x) + (a.start.y - a.end.y), 2))
{
return null;
}
if (Math.pow((result.x - a.start.x) + (result.y - a.start.y), 2) > Math.pow((a.start.x - a.end.x) + (a.start.y - a.end.y), 2))
{
return null;
}
if (Math.pow((result.x - b.end.x) + (result.y - b.end.y), 2) > Math.pow((b.start.x - b.end.x) + (b.start.y - b.end.y), 2))
{
return null;
}
if (Math.pow((result.x - b.start.x) + (result.y - b.start.y), 2) > Math.pow((b.start.x - b.end.x) + (b.start.y - b.end.y), 2))
{
return null;
}
}
return result;
return Phaser.Line.intersectsPoints(a.start, a.end, b.start, b.end, asSegment, result);
};