void mgnear::beziersBox(
Box2d& box, int count, const Point2d* points, bool closed)
{
box.empty();
for (int i = 0; i + 3 < count; i += 3) {
box.unionWith(computeCubicBox(points + i));
}
if (closed && count > 3) {
box.unionWith(computeCubicBox(points[count - 1],
points[count - 1] * 2 - points[count - 2].asVector(),
points[0] * 2 - points[1].asVector(), points[0]));
}
}
Box2d MgShapeDoc::getExtent() const
{
Box2d rect;
for (unsigned i = 0; i < im->layers.size(); i++) {
rect.unionWith(im->layers[i]->getExtent());
}
return rect;
}
Box2d calcButtonPosition(mgvector<float>& pos, int n, const Box2d& selbox)
{
Box2d rect;
for (int i = 0; i < n; i++) {
switch (i)
{
case 0:
if (n == 1) {
pos.set(2 * i, selbox.center().x, selbox.ymin); // MT
} else {
pos.set(2 * i, selbox.xmin, selbox.ymin); // LT
}
break;
case 1:
if (n == 3) {
pos.set(2 * i, selbox.center().x, selbox.ymin); // MT
} else {
pos.set(2 * i, selbox.xmax, selbox.ymin); // RT
}
break;
case 2:
if (n == 3) {
pos.set(2 * i, selbox.xmax, selbox.ymin); // RT
} else {
pos.set(2 * i, selbox.xmax, selbox.ymax); // RB
}
break;
case 3:
pos.set(2 * i, selbox.xmin, selbox.ymax); // LB
break;
case 4:
pos.set(2 * i, selbox.center().x, selbox.ymin); // MT
break;
case 5:
pos.set(2 * i, selbox.center().x, selbox.ymax); // MB
break;
case 6:
pos.set(2 * i, selbox.xmax, selbox.center().y); // RM
break;
case 7:
pos.set(2 * i, selbox.xmin, selbox.center().y); // LM
break;
default:
return rect;
}
rect.unionWith(Box2d(Point2d(pos.get(2 * i), pos.get(2 * i + 1)), 32, 32));
}
return rect;
}
void mgnear::cubicSplinesBox(
Box2d& box, int n, const Point2d* knots,
const Vector2d* knotvs, bool closed, bool hermite)
{
int n2 = (closed && n > 1) ? n + 1 : n;
float d = hermite ? 1.f/3.f : 1.f;
box.empty();
for (int i = 0; i + 1 < n2; i++)
{
box.unionWith(computeCubicBox(knots[i],
knots[i] + knotvs[i] * d,
knots[(i + 1) % n] - knotvs[(i + 1) % n] * d,
knots[(i + 1) % n]));
}
}