C++ (Cpp) Box2d::empty Examples

Example #1

File: mgnear.cpp Project: codingBobo/vgcore

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]));
    }
}

Example #2

File: mgnear.cpp Project: codingBobo/vgcore

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]));
    }
}