//Input: Light list, graphics g and a Lens
//Output: Change the Light list to the path casued by the lens
public static void LensAlgoritem(List <Light> lightList, Graphics g, Lens obj)
{
try
{
Light last = lightList[lightList.Count - 1];
PointF pi = last.pi;
PointF pf = last.pf;
PointF firstPoint = new PointF(pi.X, pi.Y);
Color lightColor = last.LightColor;
double initialAngle = last.GetAngle();
Region lensReg = obj.GetRegion();
Region rayReg = last.GetRegion();
lensReg.Intersect(rayReg); //Intersect area of lens and the last light
if (!lensReg.IsEmpty(g))
{
//getting the hit point
RectangleF boundsRect = lensReg.GetBounds(g);
PointF hit = new PointF((boundsRect.Right + boundsRect.Left) / 2, (boundsRect.Top + boundsRect.Bottom) / 2);
pf = hit;
//creating a light bewtween initial point and hit point
lightList[lightList.Count - 1] = new Light(pi, pf, lightColor);
pi = pf;
Light light = new Light(pi, pf);
double beta = 0;
beta = GetImagePointAngle(g, firstPoint, obj, initialAngle, hit);
//creating a light between the hit point and on
light = new Light(hit, MathHelper.GetEndLight(hit, beta), lightColor);
lightList.Add(light);
}
}
catch
{
}
}
