public void TestFlatRender()
{
Color sphereColor = new Color(1f, 2f, 3f);
Sphere sphere = new Sphere(
transformation: Transformation.Translation(new Vec(2f, 0f, 0f)) * Transformation.Scaling(new Vec(0.2f, 0.2f, 0.2f)),
material: new Material(Brdf: new DiffuseBRDF(pig: new UniformPigment(sphereColor)))
);
HdrImage image = new HdrImage(3, 3);
OrthogonalCamera camera = new OrthogonalCamera();
ImageTracer tracer = new ImageTracer(image, camera);
World world = new World();
world.addShape(sphere);
FlatRender renderer = new FlatRender(world);
tracer.fireAllRays(renderer);
Assert.True(image.getPixel(0, 0).isClose(Constant.Black), "TestFlatRender failed - Assert 1/9");
Assert.True(image.getPixel(1, 0).isClose(Constant.Black), "TestFlatRender failed - Assert 2/9");
Assert.True(image.getPixel(2, 0).isClose(Constant.Black), "TestFlatRender failed - Assert 3/9");
Assert.True(image.getPixel(0, 1).isClose(Constant.Black), "TestFlatRender failed - Assert 4/9");
Assert.True(image.getPixel(1, 1).isClose(sphereColor), "TestFlatRender failed - Assert 5/9");
Assert.True(image.getPixel(2, 1).isClose(Constant.Black), "TestFlatRender failed - Assert 6/9");
Assert.True(image.getPixel(0, 2).isClose(Constant.Black), "TestFlatRender failed - Assert 7/9");
Assert.True(image.getPixel(1, 2).isClose(Constant.Black), "TestFlatRender failed - Assert 8/9");
Assert.True(image.getPixel(2, 2).isClose(Constant.Black), "TestFlatRender failed - Assert 9/9");
}
public void TestPointLightRenderer1()
{
World world = new World();
world.addPointLight(new PointLight(new Point(10f, 10f, 10f), Constant.White));
world.addShape(new Sphere(Transformation.Translation(new Vec(10f, 10f, 10f))));
Sphere sphere = new Sphere(
transformation: Transformation.Translation(new Vec(2f, 0f, 0f)) * Transformation.Scaling(new Vec(0.2f, 0.2f, 0.2f)),
material: new Material(Brdf: new DiffuseBRDF(pig: new UniformPigment(Constant.White))));
HdrImage image = new HdrImage(3, 3);
OrthogonalCamera camera = new OrthogonalCamera();
ImageTracer tracer = new ImageTracer(i: image, c: camera);
world.addShape(sphere);
PointLightRender renderer = new PointLightRender(world);
tracer.fireAllRays(renderer);
Assert.True(image.getPixel(0, 0).isClose(renderer.backgroundColor), "TestPointLight rendered failed (light source shielded by a sphere) - Assert 1/9");
Assert.True(image.getPixel(1, 0).isClose(renderer.backgroundColor), "TestPointLight rendered failed (light source shielded by a sphere) - Assert 2/9");
Assert.True(image.getPixel(2, 0).isClose(renderer.backgroundColor), "TestPointLight rendered failed (light source shielded by a sphere) - Assert 3/9");
Assert.True(image.getPixel(0, 1).isClose(renderer.backgroundColor), "TestPointLight rendered failed (light source shielded by a sphere) - Assert 4/9");
Assert.True(image.getPixel(1, 1).isClose(renderer.ambientColor), "TestPointLight rendered failed (light source shielded by a sphere) - Assert 5/9");
Assert.True(image.getPixel(2, 1).isClose(renderer.backgroundColor), "TestPointLight rendered failed (light source shielded by a sphere) - Assert 6/9");
Assert.True(image.getPixel(0, 2).isClose(renderer.backgroundColor), "TestPointLight rendered failed (light source shielded by a sphere) - Assert 7/9");
Assert.True(image.getPixel(1, 2).isClose(renderer.backgroundColor), "TestPointLight rendered failed (light source shielded by a sphere) - Assert 8/9");
Assert.True(image.getPixel(2, 2).isClose(renderer.backgroundColor), "TestPointLight rendered failed (light source shielded by a sphere) - Assert 9/9");
}
public void TestImageCoverage()
{
HdrImage image = new HdrImage(4, 2);
PerspectiveCamera camera = new PerspectiveCamera();
ImageTracer tracer = new ImageTracer(image, camera);
tracer.fireAllRays((Ray r) => new Color(1f, 2f, 3f));
for (int row = 0; row < image.height; row++)
{
for (int col = 0; col < image.width; col++)
{
Assert.True(image.getPixel(col, row).isClose(new Color(1.0f, 2.0f, 3.0f)), $"TestImageCoverage failed - Assert row={row}, col={col}");
}
}
} //end of function
public static void ExecuteRender(string file, int width, int height, string pfmFile,
string ldrFile, int spp, char rend, Dictionary<string, float> variables,
float factor, float gamma, int maxDepth, int nRays, int rrLimit)
{
Console.WriteLine($"File describing the scene: {file}");
Console.WriteLine($"Image size: {width}x{height}");
Console.WriteLine($"Output PFM-file: {pfmFile}");
Console.WriteLine($"Output LDR-file: {ldrFile}");
Console.WriteLine($"Samples-per-pixel (antialiasing): {spp}");
// Console.WriteLine($"Maximum ray depth: {maxDepth}");
// Console.WriteLine($"Number of sampled rays: {nRays}");
// Console.WriteLine($"Russian Roulette Lower Limit: {rrLimit}");
Console.WriteLine("User-defined overridden variables");
if (variables.Count == 0) Console.WriteLine(" - No Variables");
foreach (var item in variables)
{
Console.WriteLine($" - {item.Key} = {item.Value}");
}
Scene scene = new Scene();
using (FileStream inputSceneStream = File.OpenRead(file))
{
try
{
scene = Scene.parseScene(inputFile: new InputStream(stream: inputSceneStream, fileName: file), variables: variables);
}
catch (GrammarError e)
{
SourceLocation loc = e.sourceLocation;
Console.WriteLine($"{loc.fileName}:{loc.lineNum}:{loc.colNum}: {e.Message}");
return;
}
}
HdrImage image = new HdrImage(width, height);
// Run the ray-tracer
ImageTracer tracer = new ImageTracer(i: image, c: scene.camera, sps: (int)MathF.Sqrt(spp));
Render renderer;
if (rend == 'o')
{
Console.WriteLine("\nUsing on/off renderer:");
renderer = new OnOffRender(world: scene.world, background: CC.Black);
}
else if (rend == 'f')
{
Console.WriteLine("\nUsing flat renderer:");
renderer = new FlatRender(world: scene.world, background: CC.Black);
}
else if (rend == 'r')
{
Console.WriteLine("\nUsing a path tracer:");
renderer = new PathTracer(world: scene.world, numOfRays: nRays, maxDepth: maxDepth, russianRouletteLimit: rrLimit);
Console.WriteLine($">>>> Max depth: {((PathTracer)renderer).maxDepth}");
Console.WriteLine($">>>> Russian Roulette Limit: {((PathTracer)renderer).russianRouletteLimit}");
Console.WriteLine($">>>> Number of rays: {((PathTracer)renderer).numOfRays}");
}
else if (rend == 'p')
{
Console.WriteLine("\nUsing a point-light tracer: ");
renderer = new PointLightRender(world: scene.world, background: CC.Black);
Console.WriteLine($">> Ambient color: {((PointLightRender)renderer).ambientColor}");
}
else
{
Console.WriteLine($"Unknown renderer: {rend}");
return;
}
Stopwatch sw = new Stopwatch();
sw.Start();
tracer.fireAllRays(renderer);
Console.WriteLine("Saving in pfm format...");
using (FileStream outpfmstream = File.OpenWrite(pfmFile))
{
image.savePfm(outpfmstream);
Console.WriteLine($"Image saved in {pfmFile}");
}
Convert.ExecuteConvert(pfmFile, ldrFile, factor, gamma, null);
sw.Stop();
TimeSpan ts = sw.Elapsed;
string elapsedTime = String.Format("{0:00}:{1:00}:{2:00}.{3:00}", ts.Hours, ts.Minutes, ts.Seconds, ts.Milliseconds / 10);
Console.WriteLine("\nRun Time: " + elapsedTime);
Console.WriteLine("See you next time!\n");
} //RenderScene
public static void ExecuteDemo(int width, int height, int angle, bool orthogonal, string pfmFile,
string ldrFile, int scene, float?luminosity, int spp, char rendType)
{
Stopwatch sw = new Stopwatch();
sw.Start();
Console.WriteLine("Starting Demo with these parameters:\n");
Console.WriteLine("Width: " + width + " pixels");
Console.WriteLine("Height: " + height + " pixels");
Console.WriteLine("Angle: " + angle + " degrees");
Console.WriteLine(orthogonal ? "Orthogonal Camera" : "Perspective Camera");
Console.WriteLine("pfmFile: " + pfmFile);
Console.WriteLine("ldrFile: " + ldrFile);
Console.WriteLine("Samples per pixel: " + spp);
Console.WriteLine("Render type: " + dictRend[rendType]);
Console.WriteLine("\n");
HdrImage image = new HdrImage(width, height);
// Camera initialization
Console.WriteLine("Creating the camera...");
// var cameraTransf = Transformation.RotationZ(Utility.DegToRad(angle)) * Transformation.Translation(-2.0f, 0.0f, 0.5f) * Tsf.RotationY(Utility.DegToRad(15));
var cameraTransf = Transformation.Translation(-2.0f, 0.0f, 0.0f);
Camera camera;
if (orthogonal)
{
camera = new OrthogonalCamera(aspectRatio: (float)width / height, transformation: cameraTransf);
}
else
{
camera = new PerspectiveCamera(aspectRatio: (float)width / height, transformation: cameraTransf);
}
// Default value on/off renderer
Render?renderer = null;
Console.WriteLine("Creating the scene...");
World world = new World();
List <float> Vertices = new List <float>()
{
-0.5f, 0.5f
};
switch (scene)
{
case 1:
//One sphere for each vertex of the cube
foreach (var x in Vertices)
{
foreach (var y in Vertices)
{
foreach (var z in Vertices)
{
world.addShape(new Sphere(Tsf.Translation(new Vec(x, y, z))
* Tsf.Scaling(new Vec(0.1f, 0.1f, 0.1f))));
} // z
} // y
} // x
//Adding two more spheres to break simmetry
world.addShape(new Sphere(Tsf.Translation(new Vec(0f, 0f, -0.5f))
* Tsf.Scaling(0.1f)));
world.addShape(new Sphere(Tsf.Translation(new Vec(0f, 0.5f, 0f))
* Tsf.Scaling(0.1f)));
break;
case 2:
HdrImage img = new HdrImage();
string inputpfm = "Texture/CokeTexture.pfm";
using (FileStream inputStream = File.OpenRead(inputpfm))
{
img.readPfm(inputStream);
Console.WriteLine($"Texture {inputpfm} has been correctly read from disk.");
}
Material groundM = new Material(new DiffuseBRDF(new CheckeredPigment(CC.BrightGreen, CC.Orange, 4)), new UniformPigment(CC.Black));
world.addShape(CC.SKY);
world.addShape(new Plane(Tsf.Translation(0f, 0f, -3f), groundM));
world.addShape(
new Cylinder(
transformation: Tsf.Translation(.5f, -1f, -1f) * Transformation.Scaling(.6f, 0.6f, 1.3f) * Tsf.RotationY(Utility.DegToRad(45)),
material: new Material(
Brdf: new DiffuseBRDF(new ImagePigment(img))
//EmittedRadiance: new UniformPigment(CC.Red)// new ImagePigment(img)
)
)
);
world.addShape(
new Cylinder(
transformation: Tsf.Translation(.5f, 1f, -1f) * Transformation.Scaling(.6f, 0.6f, 1.3f) * Tsf.RotationY(Utility.DegToRad(-45)),
material: new Material(
Brdf: new DiffuseBRDF(new ImagePigment(img))
//EmittedRadiance: new UniformPigment(CC.Red)// new ImagePigment(img)
)
)
);
break;
case 3:
PCG pcg = new PCG();
Material sph1Mat = new Material(new DiffuseBRDF(new UniformPigment(CC.BlueChill)));
Material sph2Mat = new Material(new DiffuseBRDF(new UniformPigment(Color.random())));
Material boxMat = new Material(new DiffuseBRDF(new UniformPigment(CC.BrightGreen)));
world.addShape(new Sphere(Tsf.Scaling(500f), CC.skyMat));
world.addShape(new Plane(Tsf.Translation(0f, 0f, -1f), CC.groundMat));
world.addShape(new CSGUnion(new Sphere(Transformation.Translation(0.5f, -2.6f, 1f) * Transformation.Scaling(0.6f), sph2Mat),
new Box(new Point(0f, -2.25f, 0.9f), new Point(1f, -3.25f, 1.8f), null, boxMat)));
world.addShape(new Sphere(Tsf.Translation(3f, 5f, 1.6f) * Tsf.Scaling(2.0f, 4.0f, 2.0f), CC.refMat));
world.addShape(new Sphere(Tsf.Translation(4f, -1f, 1.3f) * Tsf.Scaling(1.0f), sph1Mat));
world.addShape(new Sphere(Tsf.Translation(-4f, -0.5f, 1f) * Tsf.Scaling(2f), sph2Mat));
break;
case 4:
Material mat = new Material(null, new UniformPigment(new Color(10f, 10f, 10f)));
world.addShape(CC.SKY);
world.addShape(new Plane(Tsf.Scaling(-3f, 0f, 0f) * Tsf.RotationY(Utility.DegToRad(270)), mat));
world.addShape(CC.wikiShape(Tsf.RotationZ(Utility.DegToRad(23))));
// world.addShape(CC.wikiShape(Tsf.RotationZ(Utility.DegToRad(45))));
break;
case 5:
Material skyM = new Material(new DiffuseBRDF(new UniformPigment(CC.SkyBlue)), new UniformPigment(CC.SkyBlue));
Material checkered = new Material(new DiffuseBRDF(new CheckeredPigment(CC.Blue, CC.Yellow)), new UniformPigment(CC.Black));
Material ground = new Material(new DiffuseBRDF(new CheckeredPigment(CC.LightRed, CC.Orange)), new UniformPigment(CC.Black));
world.addShape(new Sphere(Tsf.Scaling(500f), skyM));
world.addShape(new Cylinder(Tsf.Translation(0f, 2f, -0.5f) * Tsf.Scaling(0.5f), checkered));
world.addShape(new Cone(r: 0.5f, material: checkered));
world.addShape(new Plane(Tsf.Translation(0f, 0f, -1f), ground));
break;
default:
break;
}
switch (rendType)
{
case 'o':
renderer = new OnOffRender(world);
break;
case 'f':
renderer = new FlatRender(world);
break;
case 'p':
renderer = new PointLightRender(world);
break;
case 'r':
renderer = new PathTracer(world, CC.Black, new PCG());
break;
default:
break;
}
// Ray tracing
Console.WriteLine("Rendering the scene...");
var rayTracer = new ImageTracer(image, camera, (int)Math.Sqrt(spp));
if (renderer == null)
{
renderer = new OnOffRender(world);
}
rayTracer.fireAllRays(renderer);
// Write PFM image
Console.WriteLine("Saving in pfm format...");
using (FileStream outpfmstream = File.OpenWrite(pfmFile))
{
image.savePfm(outpfmstream);
Console.WriteLine($"Image saved in {pfmFile}");
}
Convert.ExecuteConvert(pfmFile, ldrFile, Default.factor, Default.gamma, luminosity);
sw.Stop();
TimeSpan ts = sw.Elapsed;
string elapsedTime = String.Format("{0:00}:{1:00}:{2:00}.{3:00}",
ts.Hours, ts.Minutes, ts.Seconds, ts.Milliseconds / 10);
Console.WriteLine("RunTime " + elapsedTime);
}//Demo