phaser/Phaser/physics/circle/ProjCircleConvex.js

var Phaser;
(function (Phaser) {
    (function (Physics) {
        /// <reference path="../../_definitions.ts" />
        /**
        * Phaser - Physics - Projection
        */
        (function (Projection) {
            var CircleConvex = (function () {
                function CircleConvex() {
                }
                CircleConvex.Collide = function (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));
                            var oy = obj.pos.y - (t.pos.y - (signy * t.yw));

                            var twid = t.xw * 2;
                            var trad = Math.sqrt(twid * twid + 0);

                            //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) {
                                if (x < y) {
                                    //penetration in x is smaller
                                    lenP = x;
                                    y = 0;

                                    if ((obj.pos.x - t.pos.x) < 0) {
                                        x *= -1;
                                    }
                                } else {
                                    //penetration in y is smaller
                                    lenP = y;
                                    x = 0;

                                    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 {
                            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));
                                var oy = obj.pos.y - (t.pos.y - (signy * t.yw));

                                var twid = t.xw * 2;
                                var trad = Math.sqrt(twid * twid + 0);

                                //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) {
                        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));
                            var oy = obj.pos.y - (t.pos.y - (signy * t.yw));

                            var twid = t.xw * 2;
                            var trad = Math.sqrt(twid * twid + 0);

                            //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 (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));
                            var oy = obj.pos.y - (t.pos.y - (signy * t.yw));

                            var twid = t.xw * 2;
                            var trad = Math.sqrt(twid * twid + 0);

                            //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;
                            var dy = obj.pos.y - vy;

                            var len = Math.sqrt(dx * dx + dy * dy);
                            var pen = obj.radius - len;
                            if (0 < pen) {
                                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 = {}));