// Render: renders one frame
public void Render()
{
screen.Clear(0);
Vector3 Color;
//render screens
for (int y = 0; y < screen.height; y++)
{
for (int x = 0; x < screen.width; x++)
{
//Create primary ray
Ray ray;
ray.t = 30;
ray.O = camera.CamPos;
ray.D = screen.pos0 + (x * ((screen.pos1 - screen.pos0) / 512.0f)) + (y * ((screen.pos2 - screen.pos0) / 512.0f));
//ray normalized direction
ray.D = (ray.D - camera.CamPos).Normalized();
Intersection nearest = null;
Intersection nearestref = null;
foreach (Primitive p in prims)
{
Intersection overr = p.Intersection(ref ray);
if (overr != null)
{
nearest = overr;
}
}
// if there is an intersection, create a shadow ray
if (nearest != null)
{
//Check if the material is reflective
if (nearest.isMirror == false)
{
Color = CastShadowRay(nearest);
}
else
{
Color = CastShadowRay(nearest) * (1 - recursive / 100);
//Create reflection ray
Ray reflectionRay;
reflectionRay.D = ray.D - 2 * nearest.N * (Vector3.Dot(ray.D, nearest.N));
reflectionRay.O = nearest.I + reflectionRay.D * 0.0001f;
reflectionRay.t = 300;
foreach (Primitive p in prims)
{
Intersection overr = p.Intersection(ref reflectionRay);
if (overr != null)
{
nearestref = overr;
}
}
Vector3 Color2 = Vector3.Zero;
if (nearestref != null)
{
//check if the nearest reflected object is reflective to
if (nearestref.isMirror)
{
if (recursive != 100)
{
Color2 = CastShadowRay(nearestref) * (recursive / 100.0f);
}
}
else
{
Color2 = CastShadowRay(nearestref) * (recursive / 100.0f);
}
}
else
{
Color2 = Vector3.Zero;
}
Color = Color + Color2;
//draw reflectionrays on debug screen.
if (x % 20 == 0 && y == screen.height / 2)
{
screenDebug.Line(CordxTrans(reflectionRay.O.X), CordzTrans(reflectionRay.O.Z), CordxTrans(reflectionRay.D.X * ray.t), CordzTrans(reflectionRay.D.Z * ray.t), 0xff00ff);
}
}
}
else
{
Color = Vector3.Zero;
}
//plot the correct color on the correct pixel
screen.Plot(x, y, Color);
//Draw 1 in 10 rays on the debugscreen
if (x % 20 == 0 && y == screen.height / 2)
{
screenDebug.Line(CordxTrans(camera.CamPos.X), CordzTrans(camera.CamPos.Z), CordxTrans(ray.D.X * ray.t + camera.CamPos.X), CordzTrans(ray.D.Z * ray.t + camera.CamPos.Z), 0xffff00);
}
}
}
//Draw Debug screen
//Draw line between screen and debug screen
screenDebug.Line(0, 0, 0, 1024, 0xffffff);
//Draw camera as 2 orange lines
screenDebug.Line(CordxTrans(camera.CamPos.X) - 5, CordzTrans(camera.CamPos.Y) - 1, CordxTrans(camera.CamPos.X) + 5, CordzTrans(camera.CamPos.Y) - 1, 0xffa500);
screenDebug.Line(CordxTrans(camera.CamPos.X) - 5, CordzTrans(camera.CamPos.Y) + 1, CordxTrans(camera.CamPos.X) + 5, CordzTrans(camera.CamPos.Y) + 1, 0xffa500);
//Draw screen as a blue line
screenDebug.Line(CordxTrans(screen.pos1.X), CordzTrans(screen.pos1.Z), CordxTrans(screen.pos2.X), CordzTrans(screen.pos2.Z), 0x00ffff);
//Draw spheres
var sphere1 = GetSphere1;
screenDebug.DrawSphere(sphere1);
var sphere2 = GetSphere2;
screenDebug.DrawSphere(sphere2);
var sphere3 = GetSphere3;
screenDebug.DrawSphere(sphere3);
}