public void Tick()
{
// start timer
timer.Restart();
// run the simulation, 1 step
inBuffer.CopyToDevice();
kernel.Execute(workSize);
outBuffer.CopyFromDevice();
for (int i = 0; i < pw * ph; i++)
{
_in[i] = 0;
}
// visualize current state, DRAW FUNCTION -> GPU BONUS.
screen.Clear(0);
for (uint y = 0; y < screen.height / scale; y++)
{
for (uint x = 0; x < screen.width / scale; x++)
{
if (GetBit(x + xoffset, y + yoffset) == 1)
{
if (scale > 1)
{
for (uint j = 0; ((j + 1) % scale) != 0; j++)
{
for (uint i = 0; ((i + 1) % scale) != 0; i++)
{
screen.Plot((x * scale + i), (y * scale + j), 0xffffff);
}
}
}
else
{
screen.Plot(x, y, 0xffffff);
}
}
}
}
for (uint y = 0; y < ph; y++)
{
for (uint x = 0; x < pw * 32; x++)
{
if (GetBit(x, y) == 1)
{
BitSet(x, y);
}
}
}
string text = "Scale: " + scale + "x";
screen.Print(text, 5, 5, 0xffffff);
// report performance
Console.WriteLine("generation " + generation++ + ": " + timer.ElapsedMilliseconds + "ms");
}
public void Debug()
{
for (int i = 0; i < raytracer.eindpunten.Length; i++)
{
screen.Line(((int)Xtrans(raytracer.cameraPosition.X)), ((int)Ytrans(raytracer.cameraPosition.Z)), ((int)Xtrans(raytracer.eindpunten[i].X)), ((int)Ytrans((raytracer.eindpunten[i].Y))), 0xff00ff);// tekent de ray van de camera naar een intersectie
//screen.Line(((int)Xtrans(raytracer.eindpunten[i].X)), ((int)Ytrans(raytracer.eindpunten[i].Y)), ((int)Xtrans(scene.lightPositie.X)), ((int)Ytrans(scene.lightPositie.Z)),0x00ffff);// tekent de rays van een intersectie naar de lichtbron
}
r = scene.radius * (screen.height / 10);
for (double i = 0.0; i < 360.0; i += 0.1)
{
hoek = i * Math.PI / 180;
xpositieDebug = (int)(Xtrans((int)scene.sphere1Positie.X) + r * Math.Cos(hoek));
ypositieDebug = (int)(Ytrans((int)scene.sphere1Positie.Z) + r * Math.Sin(hoek));
screen.Plot(xpositieDebug, ypositieDebug, CreateColorf(scene.kleur1.X, scene.kleur1.Y, scene.kleur1.Z));
}
for (double i = 0.0; i < 360.0; i += 0.1)
{
hoek = i * Math.PI / 180;
xpositieDebug = (int)(Xtrans((int)scene.sphere2Positie.X) + r * Math.Cos(hoek));
ypositieDebug = (int)(Ytrans((int)scene.sphere2Positie.Z) + r * Math.Sin(hoek));
screen.Plot(xpositieDebug, ypositieDebug, CreateColorf(scene.kleur2.X, scene.kleur2.Y, scene.kleur2.Z));
}
for (double i = 0.0; i < 360.0; i += 0.1)
{
hoek = i * Math.PI / 180;
xpositieDebug = (int)(Xtrans((int)scene.sphere3Positie.X) + r * Math.Cos(hoek));
ypositieDebug = (int)(Ytrans((int)scene.sphere3Positie.Z) + r * Math.Sin(hoek));
screen.Plot(xpositieDebug, ypositieDebug, CreateColorf(scene.kleur3.X, scene.kleur3.Y, scene.kleur3.Z));
}
screen.Plot(((int)Xtrans(raytracer.cameraPosition.X)), ((int)Ytrans(raytracer.cameraPosition.Z)), 0xffffff); // geeft de camera positie
screen.Plot(((int)Xtrans(scene.lightPositie.X)), ((int)Ytrans(scene.lightPositie.Z)), 0x0fffff); // geeft de licht positie
}
private void RenderRaycastScene()
{
int viewportWidth = screen.width / 2;
int viewportHeight = screen.height;
Vector3 origin = camera.GetPosition();
Vector3 direction;
for (int x = 0; x < viewportWidth; x++)
{
for (int y = 0; y < viewportHeight; y++)
{
direction = camera.GetRayDirection(x / (float)viewportWidth, y / (float)viewportHeight);
Ray r = new Ray(origin, direction);
Intersect intersect = new Intersect();
intersect.OriginalRay = r;
scene.IntersectWithScene(intersect);
screen.Plot(x, y, intersect.Col);
if (y == viewportHeight / 2 && x % 32 == 0)
{
screen.Line(TX(camera.GetPosition().X), TY(camera.GetPosition().Y),
TX(intersect.OriginalRay.distance * direction.X + camera.GetPosition().X),
TY(intersect.OriginalRay.distance * direction.Y + camera.GetPosition().Y), 255 << 8);
}
}
}
}
public void Render()
{
// Een tijdelijk array wordt gemaakt om de kleuren van het scherm in te stoppen.
// Dit zorgt ervoor dat de debug niet over het scherm wordt geprint.
Vector3[] colors = new Vector3[512 * 512];
// De i houdt bij welke positie van de array er wordt gebruikt.
int i = 0;
for (int y = 0; y < 512; y++)
{
for (int x = 0; x < 512; x++)
{
// De camera heeft de richtingen per pixel opgeslagen in een array, en maakt hier nu een ray van.
Ray ray = camera.SendRay(i);
// Elke zoveel rays op y = 256 worden getekent.
if (y == 256 && x % 20 == 0)
{
// De uiteindelijke kleur van de ray wordt hier opgeslagen.
colors[i] = Trace(ray, true, maxRecursion);
// De primary rays beginnen met een rood cirkelsegment van lengte 1, zoals in de opdracht vermeld wordt.
DrawDebugRay(new Ray(ray.O, ray.D, 1), new Vector3(255, 0, 0));
}
else
{
// Als het nit in de debug getekent moet worden wordt er false meegegeven.
colors[i] = Trace(ray, false, maxRecursion);
}
i++;
}
}
// Vervolgens worden de camera, screen en primitives (alleen spheres) getekent.
DrawDebug();
// Tenslotte wordt de scene echt geplot.
i = 0;
for (int y = 0; y < 512; y++)
{
for (int x = 0; x < 512; x++)
{
screen.Plot(x, y, FixColor(colors[i]));
i++;
}
}
}
public void Raytracing()
{
// prepare for generic OpenGL rendering
GL.Enable(EnableCap.DepthTest);
GL.Disable(EnableCap.Texture2D);
GL.Clear(ClearBufferMask.DepthBufferBit);
float FOV = 400;
// creating a scene
Scene Scene1 = new Scene();
// Adding axis in the Debug view
Scene1.toggleaxis(true);
if (Scene1.Axis == true)
{
GL.Color4(1f, 1f, 1f, 1f);
GL.Begin(PrimitiveType.Lines);
GL.Vertex2(0.5f, 1); GL.Vertex2(0.5f, -1f);
GL.Vertex2(0, 0); GL.Vertex2(1, 0);
GL.End();
}
// Adding main objects to the scene
Sphere Sphere1 = new Sphere(new Vector3(200, 0, 200), 100f, new Vector3(255,0,0), aspectratio);
Sphere Sphere2 = new Sphere(new Vector3(-200, 0, 200), 100f, new Vector3(0, 0, 255), aspectratio);
Sphere Sphere3 = new Sphere(new Vector3(-100, 0, 200), 100f, new Vector3(0, 255,0), aspectratio);
Camera mainCamera = new Camera(new Vector3(0,0,-400), new Vector3(0,0,1), FOV);
Light LightSource1 = new Light(new Vector3(0, 200, 200), 255, 255, 0);
// adding light source(s) to the list
Scene1.LightList.Add(LightSource1);
//adding primitives to te primitive list
Scene1.PrimitivesList.Add(Sphere1);
Scene1.PrimitivesList.Add(Sphere3);
Scene1.PrimitivesList.Add(Sphere2);
// draw every primitive in the list
foreach (Sphere item in Scene1.PrimitivesList)
{
Scene1.DrawCircle(DebugConverter(item.Position), item.Color, item.Radius, screen);
}
// start raytracing
Raytracer raytracer = new Raytracer();
raytracer.Render(mainCamera, Scene1, screen);
for (int renderx = 0; renderx < 512; renderx++)
{
for (int rendery = 0; rendery < 512; rendery++)
{
int pixel = renderx + rendery * 512;
screen.Plot(renderx, rendery, (int)raytracer.Image[pixel]);
}
}
Raytr = raytracer;
}
// tick: renders one frame
public void Tick()
{
//clear
screen.Clear(0);
raytracer.rays.Clear();
int DEFAULT_COLOR = convertColor(new Vector3(255));
for (int i = 0; i < SCREEN_SIZE; i++)
{
for (int j = 0; j < SCREEN_SIZE; j++)
{
//Render Screen
int location = i + j * SCREEN_SIZE * 2;
Vector3 Color = raytracer.Render(i / (SCREEN_SIZE * 1.0f), j / (SCREEN_SIZE * 1.0f));
screen.pixels[location] = convertColor(Color);
//Debug Screen Default
screen.pixels[i + SCREEN_SIZE + j * SCREEN_SIZE * 2] = 0;
}
}
//Debug View
//Draw Sphere
foreach(Primitive primitive in raytracer.scene.primitives)
{
if(primitive is Sphere)
{
Sphere sphere = (Sphere)primitive;
for (int degree = 0; degree < 360; degree++)
{
int coordX = (int)(CUBE_SIZE * (sphere.radius * Math.Cos(degree) + sphere.pos.X));
int coordY = (int)(CUBE_SIZE * (sphere.radius * Math.Sin(degree) - sphere.pos.Z));
screen.Plot(coordX+ 768, coordY + 350, convertColor(sphere.Color));
}
}
}
//Draw Camera point
screen.Box((int)raytracer.camera.pos.X + 767, (int)raytracer.camera.pos.Z * -1 + 349, (int)raytracer.camera.pos.X + 769, (int)raytracer.camera.pos.Z * -1 + 351, DEFAULT_COLOR);
//Draw Rays
foreach(Ray ray in raytracer.rays)
{
float coordX = CUBE_SIZE * (ray.O.X + 40 * ray.D.X);
float coordY = CUBE_SIZE * (ray.O.Z + 40 * ray.D.Z);
screen.Line((int)ray.O.X + 768, (int)ray.O.Z * -1 + 350, (int)coordX + 768, (int)coordY * -1 + 350, DEFAULT_COLOR);
}
//Dividing Line
screen.Line(SCREEN_SIZE, 0, SCREEN_SIZE, SCREEN_SIZE, DEFAULT_COLOR);
//User Input
application.UpdateCam(raytracer.camera);
}
// Draws pixel on the screen with ability to zoom
public void DrawScreenZoom()
{
// clear the screen
screen.Clear(0);
// you essentially draw a smaller segment of the field
for (uint y = 0; y < screen.height / zoom; y++)
{
for (uint x = 0; x < screen.width / zoom; x++)
{
if (GetBit(x + xoffset, y + yoffset) == 1)
{
// draw a white square per white bit
for (uint i = 0; i < zoom; i++)
{
for (uint j = 0; j < zoom; j++)
{
screen.Plot(x * zoom + i, y * zoom + j, 0xffffff);
}
}
}
}
}
}
public void RenderGL()
{
for (int x = 0; x < screen.width - 1; x++)
{
for (int y = 0; y < screen.height - 1; y++)
{
float rx = -1 + x * 2 / ((float)screen.width - 1);
float ry = -1 + y * 2 / ((float)screen.height - 1);
ray.O = new Vector2(rx, ry);
pixelColor = 0;
foreach (Light l in light_array)
{
float a = l.light_pos.X - ray.O.X,
b = l.light_pos.Y - ray.O.Y,
distanceToLight = (float)Math.Sqrt(a * a + b * b);
ray.D = Vector2.Normalize(l.light_pos - ray.O);
ray.t = distanceToLight;
bool occluded = false;
foreach (Primitive p in primitives)
{
if (p.Intersect(ray))
{
occluded = true; break;
}
}
if (!occluded)
{
int red_int = (int)(l.R * l.attentuation(distanceToLight) * 255),
green_int = (int)(l.G * l.attentuation(distanceToLight) * 255),
blue_int = (int)(l.B * l.attentuation(distanceToLight) * 255);
pixelColor += (red_int << 16) + (green_int << 8) + blue_int;
}
}
screen.Plot(x, y, MathHelper.Clamp(pixelColor, 0, 16777215));
//Clamp the light so it is always between 0,0,0 (Black) and 255,255,255 (White)
}
}
}
// TICK
// Main application entry point: the template calls this function once per frame.
public void Tick()
{
// start timer
timer.Restart();
// run the simulation, 1 step
Simulate();
// visualize current state
screen.Clear(0);
for (uint y = 0; y < screen.height; y++)
{
for (uint x = 0; x < screen.width; x++)
{
if (GetBit(x + xoffset, y + yoffset) == 1)
{
screen.Plot(x, y, 0xffffff);
}
}
}
// report performance
Console.WriteLine("generation " + generation++ + ": " + timer.ElapsedMilliseconds + "ms");
}
// tick: renders one frame
public void Tick()
{
screen.Clear(0);
//Parallel.For is used for Multi- threading
//Loop over all pixels in the screen
Parallel.For(0, screen.height, (y) =>
{
Parallel.For(0, screen.width, (x) =>
{
var color = new Vector3(); //Black to begin with
Vector2 ray_position = new Vector2(TransX(x), TransY(y)); //position on the screen
//for each pixel loop over the light sources
foreach (Light light in LightList)
{
//shoot a ray from each pixel to each existing light source
var ray = new Ray(ray_position, light.position - ray_position);
bool occluded = false;
//loop over all primitives that are in the world
foreach (IPrimitive p in PrimitiveList)
{
if (p.Intersect(ray))
{
occluded = true;
}
}
if (!occluded)
{
color += light.color * lightAttenuation(ray.t) * light.brightness;
}
}
screen.Plot(x, y, ToRGB32(color));
});
});
}
public void Tick()
{
for (int i = 0; i < 512; i++)
{
for (int j = 0; j < 512; j++)
{
int location = j + i * 1024;
float u = j / 512f;
float v = i / 512f;
Vector3 floatcolor = tracer.Render(u, v);
int intcolor = getIntColor(floatcolor);
screen.pixels[location] = intcolor;
}
}
//Debug Screen
for (int k = 512; k < 1024; k++)
{
for (int l = 0; l < 512; l++)
{
int location = k + l * 1024;
screen.pixels[location] = 0;
}
}
//Draws every sphere, including its own offset and a bonus offset, so that the spheres don't cling to the edges.
//Color offset is a cheap solution to give the spheres a different color each time.
foreach (Sphere sphere in tracer.scene.sphereList)
{
int intcolor = getIntColor(sphere.material.color);
for (int theta = 0; theta < 360; theta++)
{
double xcord = sphere.rad * 5 * Math.Cos(theta);
double ycord = sphere.rad * 5 * Math.Sin(theta);
int offsetX = 5 * (int)sphere.spherePos.X;
int offsetZ = 5 * (int)sphere.spherePos.Z * -1;
screen.Plot((int)xcord + offsetX + 750, (int)ycord + offsetZ + 400, intcolor);
}
}
//Draws the camera in the debug view
screen.Plot((int)tracer.camera.cameraPos.X + 750, (int)tracer.camera.cameraPos.Z * -1 + 400, 0xff0000);
foreach (Light light in tracer.scene.lightList)
{
screen.Plot((int)light.lightPos.X + 750, (int)light.lightPos.Z * -1 + 400, 0xcc66ff);
}
//Draws the primary rays in the debug view
for (int i = 0; i < tracer.raylist.Count; i++)
{
float t = 50;
foreach (Primitive prim in tracer.scene.sphereList)
{
Intersection intersect = prim.Intersect(tracer.raylist[i]);
if (intersect != null)
{
if (intersect.distance < t)
{
t = intersect.distance;
}
}
}
float primOx = tracer.raylist[i].Origin.X;
float primOz = tracer.raylist[i].Origin.Z;
float primTx = (primOx + t * tracer.raylist[i].Direction.X) * 5;
float primTz = (primOz + t * tracer.raylist[i].Direction.Z) * 5;
screen.Line((int)primOx + 750, (int)primOz * -1 + 400, (int)primTx + 750, (int)primTz * -1 + 400, 0xffff00);
}
tracer.raylist.Clear();
//Draws a seperation line.
screen.Line(512, 0, 512, 512, 0xff0000);
app.MoveCam(tracer.camera);
}
// TICK
// Main application entry point: the template calls this function once per frame.
public void Tick()
{
GL.Finish();
// start timer
timer.Restart();
//Initiate work sizes
long[] workSize = { pw, ph };
long[] workSize2 = { pw *ph };
//Set kernel arguments
kernel.SetArgument(5, xoffset);
kernel.SetArgument(6, yoffset);
resolution = (int)(zoom * 512);
long[] workSize3 = { resolution / 32, resolution };
kernel.SetArgument(7, resolution);
// run the simulation, 1 step
screen.Clear(0);
if (GLinterop)
{
if (resolution != oldResolution)
{
image = new OpenCLImage <int>(ocl, resolution, resolution);
oldResolution = resolution;
}
//set image as argument
imageClearKernel.SetArgument(0, image);
imageClearKernel.LockOpenGLObject(image.texBuffer);
imageClearKernel.Execute(workSize3);
imageClearKernel.UnlockOpenGLObject(image.texBuffer);
//lock image object
kernel.SetArgument(0, image);
kernel.LockOpenGLObject(image.texBuffer);
//run kernel
kernel.Execute(workSize);
//unlock image object
kernel.UnlockOpenGLObject(image.texBuffer);
secondKernel.Execute(workSize2);
}
else
{
kernel.SetArgument(0, buffer);
for (int i = 0; i < buffer.Length; i++)
{
buffer[i] = 0;
}
buffer.CopyToDevice();
kernel.Execute(workSize);
secondKernel.Execute(workSize2);
buffer.CopyFromDevice();
for (uint y = 0; y < screen.height; y++)
{
for (uint x = 0; x < screen.width; x++)
{
screen.Plot(x, y, buffer[x + y * 512]);
}
}
}
// visualize current state
// report performance
Console.WriteLine("generation " + generation++ + ": " + timer.ElapsedMilliseconds + "ms");
//Console.ReadLine();
}
// 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);
}
// tick: renders one frame
public void Tick()
{
screen.Clear(0);
//move the lights
if (dir % 2 == 0)
{
lightbuffer[0] += TW(0.1f);
lightbuffer[5] -= TW(0.1f);
lightbuffer[11] += TW(0.1f);
lightbuffer[16] -= TW(0.1f);
}
else
{
lightbuffer[0] -= TW(0.1f);
lightbuffer[5] += TW(0.1f);
lightbuffer[11] -= TW(0.1f);
lightbuffer[16] += TW(0.1f);
}
if (TW(worldsize) < lightbuffer[0] || lightbuffer[0] < TX(-worldsize))
{
dir++;
}
Thread t1 = new Thread(() =>
{
plot(TX((-worldsize + (0f / 8f * worldsize * 2))), TX((-worldsize + (1f / 8f * worldsize * 2))));
});
Thread t2 = new Thread(() =>
{
plot(TX((-worldsize + (1f / 8f * worldsize * 2))), TX((-worldsize + (2f / 8f * worldsize * 2))));
});
Thread t3 = new Thread(() =>
{
plot(TX((-worldsize + (2f / 8f * worldsize * 2))), TX((-worldsize + (3f / 8f * worldsize * 2))));
});
Thread t4 = new Thread(() =>
{
plot(TX((-worldsize + (3f / 8f * worldsize * 2))), TX((-worldsize + (4f / 8f * worldsize * 2))));
});
Thread t5 = new Thread(() =>
{
plot(TX((-worldsize + (4f / 8f * worldsize * 2))), TX((-worldsize + (5f / 8f * worldsize * 2))));
});
Thread t6 = new Thread(() =>
{
plot(TX((-worldsize + (5f / 8f * worldsize * 2))), TX((-worldsize + (6f / 8f * worldsize * 2))));
});
Thread t7 = new Thread(() =>
{
plot(TX((-worldsize + (6f / 8f * worldsize * 2))), TX((-worldsize + (7f / 8f * worldsize * 2))));
});
Thread t8 = new Thread(() =>
{
plot(TX((-worldsize + (7f / 8f * worldsize * 2))), (TX((-worldsize + (8f / 8f * worldsize * 2)))) - 1);
});
tarr[0] = t1;
tarr[1] = t2;
tarr[2] = t3;
tarr[3] = t4;
tarr[4] = t5;
tarr[5] = t6;
tarr[6] = t7;
tarr[7] = t8;
for (int td = 0; td < tarr.Length; td++)
{
tarr[td].Start();
}
for (int td = 0; td < tarr.Length; td++)
{
tarr[td].Join();
}
for (int i = 0; i < (screen.width - 1); i++)
{
for (int j = 0; j < (screen.height - 1); j++)
{
screen.Plot(i, j, MixColor(MathHelper.Clamp(floatbuffer[i, j][0], 0, 1), MathHelper.Clamp(floatbuffer[i, j][1], 0, 1), MathHelper.Clamp(floatbuffer[i, j][2], 0, 1)));
}
}
primitivesDraw();
}
// 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());
}
}
}
// tick: renders one frame
public void Tick()
{
for (int i = 0; i < _lights.Length; i++)
{
_lights[i].Location = Tools.MoveUp(0.05f, _lights[i].Location);
}
Parallel.For(0, (screen.width + 1) * (screen.height + 1), k =>
{
int x = k % (screen.width + 1);
int y = k / (screen.width + 1);
float tx = (float)2 * x / (screen.width + 1) - 1;
float ty = -((float)2 * y / (screen.height + 1) - 1);
Vector2 location = new Vector2(tx, ty);
Vector3 pixelColor = new Vector3(0, 0, 0);
if (location.LengthSquared() < 1)
{
for (int i = 0, im = _lights.Length; i < im; i++)
{
Light light = _lights[i];
Ray ray = new Ray(location, Tools.Project(light.Location));
bool occluded = false;
float shade = 0;
for (int j = 0, jm = _primitives.Length; !occluded && j < jm; j++)
{
if (_primitives[j].Intersects(ray, out bool locked))
{
occluded = true;
shade *= locked ? 0 : 0.5f;
}
}
if (!occluded)
{
shade = LightAttenuation(ray.Distance);
}
pixelColor += light.Color * shade;
}
}
preBlend[x, y] = pixelColor;
});
// blend!
Parallel.For(0, screen.height * screen.width, k =>
{
int x = k % screen.width;
int y = k / screen.width;
Vector3 pixelColor = new Vector3(0, 0, 0);
pixelColor += preBlend[x, y];
pixelColor += preBlend[x + 1, y];
pixelColor += preBlend[x, y + 1];
pixelColor += preBlend[x + 1, y + 1];
pixelColor /= 4;
screen.Plot(x, y, MixColor(pixelColor));
});
/*
* Ray ray2 = new Ray(new Vector2(0, 0.25f), new Vector2(0.25f, 0));
* screen.Box(500 - 2, 400 - 2, 500 + 2, 400 + 2, MixColor(new Vector3(0, 0, 255)));
* screen.Box(400 - 2, 300 - 2, 400 + 2, 300 + 2, MixColor(new Vector3(0, 0, 255)));
* ray2.Draw(screen);
* Console.WriteLine(_primitives[0].Intersects(ray2, out bool temp));
*/
}
