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