toxi::geom::Polygon2D * toxi::geom::Polygon2D::smooth( const float & amount, const float & baseWeight )
{
Vec2D centroid = getCentroid();
int num = vertices.size();
std::vector<Vec2D> filtered;
for (int i = 0, j = num - 1, k = 1; i < num; i++) {
Vec2D a = vertices.at(i);
Vec2D dir = vertices.at(j).sub( a ).addSelf( vertices.at(k).sub( a ))
.addSelf(a.sub( centroid).scaleSelf(baseWeight));
filtered.push_back(a.add(dir.scaleSelf(amount)));
j++;
if (j == num) {
j = 0;
}
k++;
if (k == num) {
k = 0;
}
}
vertices.clear();
for( auto it = filtered.begin(); it != filtered.end(); ++it )
{
vertices.push_back( *it );
}
return this;
}
toxi::geom::Polygon2D::Polygon2D( const Vec2D & baseA, const Vec2D & baseB, const int & res )
{
double theta = -(toxi::math::MathUtils::PI - (toxi::math::MathUtils::PI * (res - 2) / res));
Vec2D dir = baseB.sub( baseA);
Vec2D prev = baseB;
add( baseA );
add( baseB );
for (int i = 1; i < res - 1; i++) {
Vec2D p = prev.add(dir.getRotated(theta * i));
add(p);
prev = p;
}
}