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Working sprite bounds / vertices regardless of scale or rotation

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This commit is contained in:
Richard Davey
2013-06-11 21:30:15 +01:00
parent 1f8c809f53
commit c5f6817c4c
21 changed files with 1718 additions and 203 deletions
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Phaser/utils/SpriteUtils.ts
+106 -26
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@@ -38,43 +38,39 @@ module Phaser {
else
{
// If the sprite is rotated around its center we can use this quicker method:
// Work out bounding box
SpriteUtils._sin = Phaser.GameMath.sinA[sprite.rotation];
SpriteUtils._cos = Phaser.GameMath.cosA[sprite.rotation];
if (SpriteUtils._sin < 0)
if (sprite.transform.origin.x == 0.5 && sprite.transform.origin.y == 0.5)
{
SpriteUtils._sin = -SpriteUtils._sin;
}
SpriteUtils._sin = Math.sin((sprite.rotation + sprite.transform.rotationOffset) * GameMath.DEG_TO_RAD);
SpriteUtils._cos = Math.cos((sprite.rotation + sprite.transform.rotationOffset) * GameMath.DEG_TO_RAD);
if (SpriteUtils._cos < 0)
{
SpriteUtils._cos = -SpriteUtils._cos;
}
if (SpriteUtils._sin < 0)
{
SpriteUtils._sin = -SpriteUtils._sin;
}
sprite.cameraView.width = Math.round(sprite.height * SpriteUtils._sin + sprite.width * SpriteUtils._cos);
sprite.cameraView.height = Math.round(sprite.height * SpriteUtils._cos + sprite.width * SpriteUtils._sin);
if (SpriteUtils._cos < 0)
{
SpriteUtils._cos = -SpriteUtils._cos;
}
// if origin isn't 0.5 we need to work out the difference to apply to the x/y
if (sprite.transform.origin.equals(0.5))
{
// Easy out
sprite.cameraView.width = Math.round(sprite.height * SpriteUtils._sin + sprite.width * SpriteUtils._cos);
sprite.cameraView.height = Math.round(sprite.height * SpriteUtils._cos + sprite.width * SpriteUtils._sin);
sprite.cameraView.x = Math.round(sprite.x - (camera.worldView.x * sprite.transform.scrollFactor.x) - (sprite.cameraView.width * sprite.transform.origin.x));
sprite.cameraView.y = Math.round(sprite.y - (camera.worldView.y * sprite.transform.scrollFactor.y) - (sprite.cameraView.height * sprite.transform.origin.y));
}
else
{
//var ax = sprite.cameraView.width * sprite.transform.origin.x;
//var ay = sprite.cameraView.height * sprite.transform.origin.y;
//var bx = sprite.cameraView.width * 0.5;
//var by = sprite.cameraView.height * 0.5;
//var c = sprite.game.math.distanceBetween(ax, ay, bx, by) / 2;
//console.log('actual x', ax, 'actual y', ay, 'cx', bx, 'cy', by);
sprite.cameraView.x = Math.round(sprite.x - (camera.worldView.x * sprite.transform.scrollFactor.x) - (sprite.cameraView.width * sprite.transform.origin.x));
sprite.cameraView.y = Math.round(sprite.y - (camera.worldView.y * sprite.transform.scrollFactor.y) - (sprite.cameraView.height * sprite.transform.origin.y));
/*
// Useful to get the maximum AABB size of any given rect
If you want a single box that covers all angles, just take the half-diagonal of your existing box as the radius of a circle.
The new box has to contain this circle, so it should be a square with side-length equal to twice the radius
(equiv. the diagonal of the original AABB) and with the same center as the original.
*/
}
}
@@ -91,6 +87,90 @@ module Phaser {
}
static getCornersAsPoints(sprite: Sprite): Phaser.Point[] {
var out: Phaser.Point[] = [];
var sin = Math.sin((sprite.transform.rotation + sprite.transform.rotationOffset) * Phaser.GameMath.DEG_TO_RAD);
var cos = Math.cos((sprite.transform.rotation + sprite.transform.rotationOffset) * Phaser.GameMath.DEG_TO_RAD);
// Upper Left
out.push(new Point(sprite.x + (sprite.width / 2) * cos - (sprite.height / 2) * sin, sprite.y + (sprite.height / 2) * cos + (sprite.width / 2) * sin));
// Upper Right
out.push(new Point(sprite.x - (sprite.width / 2) * cos - (sprite.height / 2) * sin, sprite.y + (sprite.height / 2) * cos - (sprite.width / 2) * sin));
// Bottom Left
out.push(new Point(sprite.x + (sprite.width / 2) * cos + (sprite.height / 2) * sin, sprite.y - (sprite.height / 2) * cos + (sprite.width / 2) * sin));
// Bottom Right
out.push(new Point(sprite.x - (sprite.width / 2) * cos + (sprite.height / 2) * sin, sprite.y - (sprite.height / 2) * cos - (sprite.width / 2) * sin));
return out;
}
static getCornersAsPoints2(sprite: Sprite): Phaser.Point[] {
var out: Phaser.Point[] = [];
var sin = Math.sin((sprite.transform.rotation + sprite.transform.rotationOffset) * Phaser.GameMath.DEG_TO_RAD);
var cos = Math.cos((sprite.transform.rotation + sprite.transform.rotationOffset) * Phaser.GameMath.DEG_TO_RAD);
// This = the center point
var cx = sprite.x + (sprite.width / 2) * cos - (sprite.height / 2) * sin;
var cy = sprite.y + (sprite.height / 2) * cos + (sprite.width / 2) * sin;
// Upper Left
out.push(new Point(cx + (sprite.width / 2) * cos - (sprite.height / 2) * sin, cy + (sprite.height / 2) * cos + (sprite.width / 2) * sin));
// Upper Right
out.push(new Point(cx - (sprite.width / 2) * cos - (sprite.height / 2) * sin, cy + (sprite.height / 2) * cos - (sprite.width / 2) * sin));
// Bottom Left
out.push(new Point(cx + (sprite.width / 2) * cos + (sprite.height / 2) * sin, cy - (sprite.height / 2) * cos + (sprite.width / 2) * sin));
// Bottom Right
out.push(new Point(cx - (sprite.width / 2) * cos + (sprite.height / 2) * sin, cy - (sprite.height / 2) * cos - (sprite.width / 2) * sin));
return out;
}
static getCornersAsPoints3(sprite: Sprite): Phaser.Point[] {
var out: Phaser.Point[] = [];
var sin: number = sprite.transform.sin;
var cos: number = sprite.transform.cos;
//var sin = Math.sin((sprite.transform.rotation + sprite.transform.rotationOffset) * Phaser.GameMath.DEG_TO_RAD);
//var cos = Math.cos((sprite.transform.rotation + sprite.transform.rotationOffset) * Phaser.GameMath.DEG_TO_RAD);
// This = the center point
//var cx = sprite.x + sprite.transform.distance * Math.cos((sprite.transform.rotation * Math.PI / 180) + sprite.transform.angleToCenter);
//var cy = sprite.y + sprite.transform.distance * Math.sin((sprite.transform.rotation * Math.PI / 180) + sprite.transform.angleToCenter);
var cx: number = sprite.transform.centerX;
var cy: number = sprite.transform.centerY;
// Upper Left
out.push(new Point(cx + sprite.transform.halfWidth * cos - sprite.transform.halfHeight * sin, cy + sprite.transform.halfHeight * cos + sprite.transform.halfWidth * sin));
// Upper Right
out.push(new Point(cx - sprite.transform.halfWidth * cos - sprite.transform.halfHeight * sin, cy + sprite.transform.halfHeight * cos - sprite.transform.halfWidth * sin));
// Bottom Left
out.push(new Point(cx + sprite.transform.halfWidth * cos + sprite.transform.halfHeight * sin, cy - sprite.transform.halfHeight * cos + sprite.transform.halfWidth * sin));
// Bottom Right
out.push(new Point(cx - sprite.transform.halfWidth * cos + sprite.transform.halfHeight * sin, cy - sprite.transform.halfHeight * cos - sprite.transform.halfWidth * sin));
return out;
}
static getAsPoints(sprite: Sprite): Phaser.Point[] {
var out: Phaser.Point[] = [];