216 lines
6.6 KiB
JavaScript
216 lines
6.6 KiB
JavaScript
|
import * as matrix from './matrix.js';
|
||
|
|
import Point from './Point.js';
|
||
|
|
var mathMin = Math.min;
|
||
|
|
var mathMax = Math.max;
|
||
|
|
var lt = new Point();
|
||
|
|
var rb = new Point();
|
||
|
|
var lb = new Point();
|
||
|
|
var rt = new Point();
|
||
|
|
var minTv = new Point();
|
||
|
|
var maxTv = new Point();
|
||
|
|
var BoundingRect = (function () {
|
||
|
|
function BoundingRect(x, y, width, height) {
|
||
|
|
if (width < 0) {
|
||
|
|
x = x + width;
|
||
|
|
width = -width;
|
||
|
|
}
|
||
|
|
if (height < 0) {
|
||
|
|
y = y + height;
|
||
|
|
height = -height;
|
||
|
|
}
|
||
|
|
this.x = x;
|
||
|
|
this.y = y;
|
||
|
|
this.width = width;
|
||
|
|
this.height = height;
|
||
|
|
}
|
||
|
|
BoundingRect.prototype.union = function (other) {
|
||
|
|
var x = mathMin(other.x, this.x);
|
||
|
|
var y = mathMin(other.y, this.y);
|
||
|
|
if (isFinite(this.x) && isFinite(this.width)) {
|
||
|
|
this.width = mathMax(other.x + other.width, this.x + this.width) - x;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
this.width = other.width;
|
||
|
|
}
|
||
|
|
if (isFinite(this.y) && isFinite(this.height)) {
|
||
|
|
this.height = mathMax(other.y + other.height, this.y + this.height) - y;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
this.height = other.height;
|
||
|
|
}
|
||
|
|
this.x = x;
|
||
|
|
this.y = y;
|
||
|
|
};
|
||
|
|
BoundingRect.prototype.applyTransform = function (m) {
|
||
|
|
BoundingRect.applyTransform(this, this, m);
|
||
|
|
};
|
||
|
|
BoundingRect.prototype.calculateTransform = function (b) {
|
||
|
|
var a = this;
|
||
|
|
var sx = b.width / a.width;
|
||
|
|
var sy = b.height / a.height;
|
||
|
|
var m = matrix.create();
|
||
|
|
matrix.translate(m, m, [-a.x, -a.y]);
|
||
|
|
matrix.scale(m, m, [sx, sy]);
|
||
|
|
matrix.translate(m, m, [b.x, b.y]);
|
||
|
|
return m;
|
||
|
|
};
|
||
|
|
BoundingRect.prototype.intersect = function (b, mtv) {
|
||
|
|
if (!b) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
if (!(b instanceof BoundingRect)) {
|
||
|
|
b = BoundingRect.create(b);
|
||
|
|
}
|
||
|
|
var a = this;
|
||
|
|
var ax0 = a.x;
|
||
|
|
var ax1 = a.x + a.width;
|
||
|
|
var ay0 = a.y;
|
||
|
|
var ay1 = a.y + a.height;
|
||
|
|
var bx0 = b.x;
|
||
|
|
var bx1 = b.x + b.width;
|
||
|
|
var by0 = b.y;
|
||
|
|
var by1 = b.y + b.height;
|
||
|
|
var overlap = !(ax1 < bx0 || bx1 < ax0 || ay1 < by0 || by1 < ay0);
|
||
|
|
if (mtv) {
|
||
|
|
var dMin = Infinity;
|
||
|
|
var dMax = 0;
|
||
|
|
var d0 = Math.abs(ax1 - bx0);
|
||
|
|
var d1 = Math.abs(bx1 - ax0);
|
||
|
|
var d2 = Math.abs(ay1 - by0);
|
||
|
|
var d3 = Math.abs(by1 - ay0);
|
||
|
|
var dx = Math.min(d0, d1);
|
||
|
|
var dy = Math.min(d2, d3);
|
||
|
|
if (ax1 < bx0 || bx1 < ax0) {
|
||
|
|
if (dx > dMax) {
|
||
|
|
dMax = dx;
|
||
|
|
if (d0 < d1) {
|
||
|
|
Point.set(maxTv, -d0, 0);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
Point.set(maxTv, d1, 0);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
if (dx < dMin) {
|
||
|
|
dMin = dx;
|
||
|
|
if (d0 < d1) {
|
||
|
|
Point.set(minTv, d0, 0);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
Point.set(minTv, -d1, 0);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (ay1 < by0 || by1 < ay0) {
|
||
|
|
if (dy > dMax) {
|
||
|
|
dMax = dy;
|
||
|
|
if (d2 < d3) {
|
||
|
|
Point.set(maxTv, 0, -d2);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
Point.set(maxTv, 0, d3);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
if (dx < dMin) {
|
||
|
|
dMin = dx;
|
||
|
|
if (d2 < d3) {
|
||
|
|
Point.set(minTv, 0, d2);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
Point.set(minTv, 0, -d3);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (mtv) {
|
||
|
|
Point.copy(mtv, overlap ? minTv : maxTv);
|
||
|
|
}
|
||
|
|
return overlap;
|
||
|
|
};
|
||
|
|
BoundingRect.prototype.contain = function (x, y) {
|
||
|
|
var rect = this;
|
||
|
|
return x >= rect.x
|
||
|
|
&& x <= (rect.x + rect.width)
|
||
|
|
&& y >= rect.y
|
||
|
|
&& y <= (rect.y + rect.height);
|
||
|
|
};
|
||
|
|
BoundingRect.prototype.clone = function () {
|
||
|
|
return new BoundingRect(this.x, this.y, this.width, this.height);
|
||
|
|
};
|
||
|
|
BoundingRect.prototype.copy = function (other) {
|
||
|
|
BoundingRect.copy(this, other);
|
||
|
|
};
|
||
|
|
BoundingRect.prototype.plain = function () {
|
||
|
|
return {
|
||
|
|
x: this.x,
|
||
|
|
y: this.y,
|
||
|
|
width: this.width,
|
||
|
|
height: this.height
|
||
|
|
};
|
||
|
|
};
|
||
|
|
BoundingRect.prototype.isFinite = function () {
|
||
|
|
return isFinite(this.x)
|
||
|
|
&& isFinite(this.y)
|
||
|
|
&& isFinite(this.width)
|
||
|
|
&& isFinite(this.height);
|
||
|
|
};
|
||
|
|
BoundingRect.prototype.isZero = function () {
|
||
|
|
return this.width === 0 || this.height === 0;
|
||
|
|
};
|
||
|
|
BoundingRect.create = function (rect) {
|
||
|
|
return new BoundingRect(rect.x, rect.y, rect.width, rect.height);
|
||
|
|
};
|
||
|
|
BoundingRect.copy = function (target, source) {
|
||
|
|
target.x = source.x;
|
||
|
|
target.y = source.y;
|
||
|
|
target.width = source.width;
|
||
|
|
target.height = source.height;
|
||
|
|
};
|
||
|
|
BoundingRect.applyTransform = function (target, source, m) {
|
||
|
|
if (!m) {
|
||
|
|
if (target !== source) {
|
||
|
|
BoundingRect.copy(target, source);
|
||
|
|
}
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (m[1] < 1e-5 && m[1] > -1e-5 && m[2] < 1e-5 && m[2] > -1e-5) {
|
||
|
|
var sx = m[0];
|
||
|
|
var sy = m[3];
|
||
|
|
var tx = m[4];
|
||
|
|
var ty = m[5];
|
||
|
|
target.x = source.x * sx + tx;
|
||
|
|
target.y = source.y * sy + ty;
|
||
|
|
target.width = source.width * sx;
|
||
|
|
target.height = source.height * sy;
|
||
|
|
if (target.width < 0) {
|
||
|
|
target.x += target.width;
|
||
|
|
target.width = -target.width;
|
||
|
|
}
|
||
|
|
if (target.height < 0) {
|
||
|
|
target.y += target.height;
|
||
|
|
target.height = -target.height;
|
||
|
|
}
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
lt.x = lb.x = source.x;
|
||
|
|
lt.y = rt.y = source.y;
|
||
|
|
rb.x = rt.x = source.x + source.width;
|
||
|
|
rb.y = lb.y = source.y + source.height;
|
||
|
|
lt.transform(m);
|
||
|
|
rt.transform(m);
|
||
|
|
rb.transform(m);
|
||
|
|
lb.transform(m);
|
||
|
|
target.x = mathMin(lt.x, rb.x, lb.x, rt.x);
|
||
|
|
target.y = mathMin(lt.y, rb.y, lb.y, rt.y);
|
||
|
|
var maxX = mathMax(lt.x, rb.x, lb.x, rt.x);
|
||
|
|
var maxY = mathMax(lt.y, rb.y, lb.y, rt.y);
|
||
|
|
target.width = maxX - target.x;
|
||
|
|
target.height = maxY - target.y;
|
||
|
|
};
|
||
|
|
return BoundingRect;
|
||
|
|
}());
|
||
|
|
export default BoundingRect;
|