mirror of
https://github.com/photonstorm/phaser
synced 2024-12-22 11:03:23 +00:00
180 lines
10 KiB
JavaScript
180 lines
10 KiB
JavaScript
var Phaser;
|
|
(function (Phaser) {
|
|
(function (Physics) {
|
|
/// <reference path="../../_definitions.ts" />
|
|
/**
|
|
* Phaser - Physics - Projection
|
|
*/
|
|
(function (Projection) {
|
|
var CircleConvex = (function () {
|
|
function CircleConvex() { }
|
|
CircleConvex.Collide = function Collide(x, y, oH, oV, obj, t) {
|
|
//if the object is horiz AND/OR vertical neighbor in the normal (signx,signy)
|
|
//direction, collide vs. tile-circle only.
|
|
//if we're colliding diagonally:
|
|
// -else, collide vs. the appropriate vertex
|
|
//if obj is in this tile: perform collision as for aabb
|
|
//if obj is horiz or vert neigh against direction of slope: collide vs. face
|
|
var signx = t.signx;
|
|
var signy = t.signy;
|
|
var lenP;
|
|
if(oH == 0) {
|
|
if(oV == 0) {
|
|
//colliding with current tile
|
|
var ox = obj.pos.x - (t.pos.x - (signx * t.xw));//(ox,oy) is the vector from the tile-circle to
|
|
|
|
var oy = obj.pos.y - (t.pos.y - (signy * t.yw));//the circle's center
|
|
|
|
var twid = t.xw * 2;
|
|
var trad = Math.sqrt(twid * twid + 0);//this gives us the radius of a circle centered on the tile's corner and extending to the opposite edge of the tile;
|
|
|
|
//note that this should be precomputed at compile-time since it's constant
|
|
var len = Math.sqrt(ox * ox + oy * oy);
|
|
var pen = (trad + obj.radius) - len;
|
|
if(0 < pen) {
|
|
//find the smallest axial projection vector
|
|
if(x < y) {
|
|
//penetration in x is smaller
|
|
lenP = x;
|
|
y = 0;
|
|
//get sign for projection along x-axis
|
|
if((obj.pos.x - t.pos.x) < 0) {
|
|
x *= -1;
|
|
}
|
|
} else {
|
|
//penetration in y is smaller
|
|
lenP = y;
|
|
x = 0;
|
|
//get sign for projection along y-axis
|
|
if((obj.pos.y - t.pos.y) < 0) {
|
|
y *= -1;
|
|
}
|
|
}
|
|
if(lenP < pen) {
|
|
obj.reportCollisionVsWorld(x, y, x / lenP, y / lenP, t);
|
|
return Phaser.Physics.Circle.COL_AXIS;
|
|
} else {
|
|
//note: len should NEVER be == 0, because if it is,
|
|
//projeciton by an axis shoudl always be shorter, and we should
|
|
//never arrive here
|
|
ox /= len;
|
|
oy /= len;
|
|
obj.reportCollisionVsWorld(ox * pen, oy * pen, ox, oy, t);
|
|
return Phaser.Physics.Circle.COL_OTHER;
|
|
}
|
|
}
|
|
} else {
|
|
//colliding vertically
|
|
if((signy * oV) < 0) {
|
|
//colliding with face/edge
|
|
obj.reportCollisionVsWorld(0, y * oV, 0, oV, t);
|
|
return Phaser.Physics.Circle.COL_AXIS;
|
|
} else {
|
|
//obj in neighboring cell pointed at by tile normal;
|
|
//we could only be colliding vs the tile-circle surface
|
|
var ox = obj.pos.x - (t.pos.x - (signx * t.xw));//(ox,oy) is the vector from the tile-circle to
|
|
|
|
var oy = obj.pos.y - (t.pos.y - (signy * t.yw));//the circle's center
|
|
|
|
var twid = t.xw * 2;
|
|
var trad = Math.sqrt(twid * twid + 0);//this gives us the radius of a circle centered on the tile's corner and extending to the opposite edge of the tile;
|
|
|
|
//note that this should be precomputed at compile-time since it's constant
|
|
var len = Math.sqrt(ox * ox + oy * oy);
|
|
var pen = (trad + obj.radius) - len;
|
|
if(0 < pen) {
|
|
//note: len should NEVER be == 0, because if it is,
|
|
//obj is not in a neighboring cell!
|
|
ox /= len;
|
|
oy /= len;
|
|
obj.reportCollisionVsWorld(ox * pen, oy * pen, ox, oy, t);
|
|
return Phaser.Physics.Circle.COL_OTHER;
|
|
}
|
|
}
|
|
}
|
|
} else if(oV == 0) {
|
|
//colliding horizontally
|
|
if((signx * oH) < 0) {
|
|
//colliding with face/edge
|
|
obj.reportCollisionVsWorld(x * oH, 0, oH, 0, t);
|
|
return Phaser.Physics.Circle.COL_AXIS;
|
|
} else {
|
|
//obj in neighboring cell pointed at by tile normal;
|
|
//we could only be colliding vs the tile-circle surface
|
|
var ox = obj.pos.x - (t.pos.x - (signx * t.xw));//(ox,oy) is the vector from the tile-circle to
|
|
|
|
var oy = obj.pos.y - (t.pos.y - (signy * t.yw));//the circle's center
|
|
|
|
var twid = t.xw * 2;
|
|
var trad = Math.sqrt(twid * twid + 0);//this gives us the radius of a circle centered on the tile's corner and extending to the opposite edge of the tile;
|
|
|
|
//note that this should be precomputed at compile-time since it's constant
|
|
var len = Math.sqrt(ox * ox + oy * oy);
|
|
var pen = (trad + obj.radius) - len;
|
|
if(0 < pen) {
|
|
//note: len should NEVER be == 0, because if it is,
|
|
//obj is not in a neighboring cell!
|
|
ox /= len;
|
|
oy /= len;
|
|
obj.reportCollisionVsWorld(ox * pen, oy * pen, ox, oy, t);
|
|
return Phaser.Physics.Circle.COL_OTHER;
|
|
}
|
|
}
|
|
} else {
|
|
//colliding diagonally
|
|
if(0 < ((signx * oH) + (signy * oV))) {
|
|
//obj in diag neighb cell pointed at by tile normal;
|
|
//we could only be colliding vs the tile-circle surface
|
|
var ox = obj.pos.x - (t.pos.x - (signx * t.xw));//(ox,oy) is the vector from the tile-circle to
|
|
|
|
var oy = obj.pos.y - (t.pos.y - (signy * t.yw));//the circle's center
|
|
|
|
var twid = t.xw * 2;
|
|
var trad = Math.sqrt(twid * twid + 0);//this gives us the radius of a circle centered on the tile's corner and extending to the opposite edge of the tile;
|
|
|
|
//note that this should be precomputed at compile-time since it's constant
|
|
var len = Math.sqrt(ox * ox + oy * oy);
|
|
var pen = (trad + obj.radius) - len;
|
|
if(0 < pen) {
|
|
//note: len should NEVER be == 0, because if it is,
|
|
//obj is not in a neighboring cell!
|
|
ox /= len;
|
|
oy /= len;
|
|
obj.reportCollisionVsWorld(ox * pen, oy * pen, ox, oy, t);
|
|
return Phaser.Physics.Circle.COL_OTHER;
|
|
}
|
|
} else {
|
|
//collide vs. vertex
|
|
//get diag vertex position
|
|
var vx = t.pos.x + (oH * t.xw);
|
|
var vy = t.pos.y + (oV * t.yw);
|
|
var dx = obj.pos.x - vx;//calc vert->circle vector
|
|
|
|
var dy = obj.pos.y - vy;
|
|
var len = Math.sqrt(dx * dx + dy * dy);
|
|
var pen = obj.radius - len;
|
|
if(0 < pen) {
|
|
//vertex is in the circle; project outward
|
|
if(len == 0) {
|
|
//project out by 45deg
|
|
dx = oH / Math.SQRT2;
|
|
dy = oV / Math.SQRT2;
|
|
} else {
|
|
dx /= len;
|
|
dy /= len;
|
|
}
|
|
obj.reportCollisionVsWorld(dx * pen, dy * pen, dx, dy, t);
|
|
return Phaser.Physics.Circle.COL_OTHER;
|
|
}
|
|
}
|
|
}
|
|
return Phaser.Physics.Circle.COL_NONE;
|
|
};
|
|
return CircleConvex;
|
|
})();
|
|
Projection.CircleConvex = CircleConvex;
|
|
})(Physics.Projection || (Physics.Projection = {}));
|
|
var Projection = Physics.Projection;
|
|
})(Phaser.Physics || (Phaser.Physics = {}));
|
|
var Physics = Phaser.Physics;
|
|
})(Phaser || (Phaser = {}));
|