bd028579
 易尊强
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import Point from './Point.js';
var extent = [0, 0];
var extent2 = [0, 0];
var minTv = new Point();
var maxTv = new Point();
var OrientedBoundingRect = (function () {
function OrientedBoundingRect(rect, transform) {
this._corners = [];
this._axes = [];
this._origin = [0, 0];
for (var i = 0; i < 4; i++) {
this._corners[i] = new Point();
}
for (var i = 0; i < 2; i++) {
this._axes[i] = new Point();
}
if (rect) {
this.fromBoundingRect(rect, transform);
}
}
OrientedBoundingRect.prototype.fromBoundingRect = function (rect, transform) {
var corners = this._corners;
var axes = this._axes;
var x = rect.x;
var y = rect.y;
var x2 = x + rect.width;
var y2 = y + rect.height;
corners[0].set(x, y);
corners[1].set(x2, y);
corners[2].set(x2, y2);
corners[3].set(x, y2);
if (transform) {
for (var i = 0; i < 4; i++) {
corners[i].transform(transform);
}
}
Point.sub(axes[0], corners[1], corners[0]);
Point.sub(axes[1], corners[3], corners[0]);
axes[0].normalize();
axes[1].normalize();
for (var i = 0; i < 2; i++) {
this._origin[i] = axes[i].dot(corners[0]);
}
};
OrientedBoundingRect.prototype.intersect = function (other, mtv) {
var overlapped = true;
var noMtv = !mtv;
minTv.set(Infinity, Infinity);
maxTv.set(0, 0);
if (!this._intersectCheckOneSide(this, other, minTv, maxTv, noMtv, 1)) {
overlapped = false;
if (noMtv) {
return overlapped;
}
}
if (!this._intersectCheckOneSide(other, this, minTv, maxTv, noMtv, -1)) {
overlapped = false;
if (noMtv) {
return overlapped;
}
}
if (!noMtv) {
Point.copy(mtv, overlapped ? minTv : maxTv);
}
return overlapped;
};
OrientedBoundingRect.prototype._intersectCheckOneSide = function (self, other, minTv, maxTv, noMtv, inverse) {
var overlapped = true;
for (var i = 0; i < 2; i++) {
var axis = this._axes[i];
this._getProjMinMaxOnAxis(i, self._corners, extent);
this._getProjMinMaxOnAxis(i, other._corners, extent2);
if (extent[1] < extent2[0] || extent[0] > extent2[1]) {
overlapped = false;
if (noMtv) {
return overlapped;
}
var dist0 = Math.abs(extent2[0] - extent[1]);
var dist1 = Math.abs(extent[0] - extent2[1]);
if (Math.min(dist0, dist1) > maxTv.len()) {
if (dist0 < dist1) {
Point.scale(maxTv, axis, -dist0 * inverse);
}
else {
Point.scale(maxTv, axis, dist1 * inverse);
}
}
}
else if (minTv) {
var dist0 = Math.abs(extent2[0] - extent[1]);
var dist1 = Math.abs(extent[0] - extent2[1]);
if (Math.min(dist0, dist1) < minTv.len()) {
if (dist0 < dist1) {
Point.scale(minTv, axis, dist0 * inverse);
}
else {
Point.scale(minTv, axis, -dist1 * inverse);
}
}
}
}
return overlapped;
};
OrientedBoundingRect.prototype._getProjMinMaxOnAxis = function (dim, corners, out) {
var axis = this._axes[dim];
var origin = this._origin;
var proj = corners[0].dot(axis) + origin[dim];
var min = proj;
var max = proj;
for (var i = 1; i < corners.length; i++) {
var proj_1 = corners[i].dot(axis) + origin[dim];
min = Math.min(proj_1, min);
max = Math.max(proj_1, max);
}
out[0] = min;
out[1] = max;
};
return OrientedBoundingRect;
}());
export default OrientedBoundingRect;
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