public Square(float x, float y, float s, floatColour colour)
{
this.x = x;
this.y = y;
this.s = s;
this.colour = colour;
}
public Circle(float x, float y, float r, bool light, floatColour colour)
{
this.x = x;
this.y = y;
this.r = r;
this.light = light;
this.colour = colour;
}
// initialize
public void Init()
{
float[] aax = { 0, 0.5f, 0, 0.5f };
float[] aay = { 0, 0, 0.5f, 0.5f };
light = new List <Circle>();
circles = new List <Circle>();
squares = new List <Square>();
circles.Add(new Circle(0.3f, 0.1f, 0.1f, false, new floatColour(0, 0, 0)));
circles.Add(new Circle(-0.3f, 0.5f, 0.1f, false, new floatColour(0, 0, 0)));
squares.Add(new Square(-0.3f, -0.3f, 0.2f, new floatColour(0, 0, 0)));
light.Add(new Circle(0f, 0.5f, 0.25f, true, new floatColour(1, 0, 1)));
light.Add(new Circle(-0.2f, 0.2f, 0.25f, true, new floatColour(0, 1, 0)));
light.Add(new Circle(0.2f, -0.4f, 0.25f, true, new floatColour(0, 0, 1)));
ray = new Ray();
for (int x = 0; x < screen.width; x++)
{
for (int y = 0; y < screen.height; y++)
{
floatColour[] pixelColour = { new floatColour(0, 0, 0), new floatColour(0, 0, 0), new floatColour(0, 0, 0), new floatColour(0, 0, 0) };
foreach (Circle c in light)
{
for (int k = 0; k < 4; k++)
{
ray.O = pixelPosition(x + aax[k], y + aay[k]);
ray.D = (new Vector2(ray.O.X - c.x, ray.O.Y - c.y)).Normalized();
ray.t = (float)Math.Sqrt(Math.Pow(ray.O.X - c.x, 2) + Math.Pow(ray.O.Y - c.y, 2));
bool occluded = false;
foreach (Circle p in circles)
{
if ((Math.Pow(ray.O.X - p.x, 2) + Math.Pow(ray.O.Y - p.y, 2)) > (p.r * p.r))
{
if (ray.intersection(p))
{
occluded = true;
float tmp = (float)Math.Sqrt((Math.Pow(c.x - p.x, 2) + Math.Pow(c.y - p.y, 2)));
if (ray.t < tmp && (ray.t > 0 && tmp > 0))
{
occluded = false;
}
tmp = (float)Math.Sqrt((Math.Pow(ray.O.X - p.x, 2) + Math.Pow(ray.O.Y - p.y, 2)));
if (ray.t < tmp)
{
occluded = false;
}
}
}
else
{
occluded = true;
pixelColour[k] = new floatColour(0, 0, 0);
}
}
foreach (Square p in squares)
{
if (ray.intersection2(p))
{
occluded = true;
float tmp = (float)Math.Sqrt((Math.Pow(ray.O.X - (p.x + p.s), 2) + Math.Pow(ray.O.Y - (p.y + p.s), 2)));
if (ray.t < tmp)
{
occluded = false;
}
}
}
if (!occluded)
{
pixelColour[k] += c.colour * lightAttenuation(Vector2.Distance(ray.O, new Vector2(c.x, c.y)), c.r);
}
}
}
screen.Plot(x, y, ((pixelColour[0] + pixelColour[1] + pixelColour[2] + pixelColour[3]) / 4.0f).ToRGB32());
}
}
}
