//=============================================================================
Point2F Rectangle2::center() const
{
Point2F result;
Vector2F dir2 = dir();
dir2.multiply(0.5);
result.add(dir2);
Vector2F up2 = up();
up2.multiply(0.5);
result.add(up2);
return result;
}
//=============================================================================
Point2F Ray2::getPoint(double parameter, double offset) const
{
Vector2F delta = dir_;
delta.multiply(parameter);
Point2F result = origin_;
result.add(delta);
if (offset == 0.0) return result;
Vector2F offsetVec = dir_;
offsetVec.setPerpendLeft();
offsetVec.multiply( offset/offsetVec.getLength() );
result.add(offsetVec);
return result;
}
//=============================================================================
Point2F Rectangle2::point(int index) const
{
while ( index < 0 ) index += 4;
while ( index > 3 ) index -= 4;
Point2F result = origin_;
switch (index)
{
case 1:
result.add(width_);
break;
case 2:
result.add(width_);
case 3:
result.add(up_());
break;
case 0:
default:
break;
}
return result;
}