public void ReadingPpmFile_ShouldRespectTheScaleSetting()
{
var file =
@"P3
2 2
100
100 100 100 50 50 50
75 50 25 0 0 0";
var reader = new StringReader(file);
var canvas = PpmReader.ReadCanvasFromPpm(reader);
Assert.Equal(new Color(0.75, 0.5, 0.25), canvas.GetPixel(0, 1));
}
public void ReadingPpmFileWithTheWrongMagicNumber_ShouldFail()
{
var file =
@"P32
1 1
255
0 0 0";
var reader = new StringReader(file);
var canvas = PpmReader.ReadCanvasFromPpm(reader);
Assert.Equal(0, canvas.Width);
Assert.Equal(0, canvas.Height);
}
public void ReadingPixelDataFromPpmFile_ShouldCreateCanvas(int x, int y, Color expected)
{
var file =
@"P3
4 3
255
255 127 0 0 127 255 127 255 0 255 255 255
0 0 0 255 0 0 0 255 0 0 0 255
255 255 0 0 255 255 255 0 255 127 127 127";
var reader = new StringReader(file);
var canvas = PpmReader.ReadCanvasFromPpm(reader);
Assert.Equal(expected, canvas.GetPixel(x, y), ColorComparer);
}
public void ReadingPpmFile_ShouldAllowAnRgbTripleToSpanLines()
{
var file =
@"P3
1 1
255
51
153
204";
var reader = new StringReader(file);
var canvas = PpmReader.ReadCanvasFromPpm(reader);
Assert.Equal(new Color(0.2, 0.6, 0.8), canvas.GetPixel(0, 0));
}
public void ReadingPpmFile_ShouldReturnCanvasWithCorrectDimensions()
{
var file =
@"P3
10 2
255
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0";
var reader = new StringReader(file);
var canvas = PpmReader.ReadCanvasFromPpm(reader);
Assert.Equal(10, canvas.Width);
Assert.Equal(2, canvas.Height);
}
public void ReadingPpmFile_ShouldIgnoreCommentLines()
{
var file =
@"P3
# this is a comment
2 1
# this, too
255
# another comment
255 255 255
# oh, no, comments in the pixel data!
255 0 255";
var reader = new StringReader(file);
var canvas = PpmReader.ReadCanvasFromPpm(reader);
Assert.Equal(Color.White, canvas.GetPixel(0, 0));
Assert.Equal(new Color(1, 0, 1), canvas.GetPixel(1, 0));
}
public void ReadingCheckerPatternFromPpmFile_ShouldReturnCanvas(double u, double v, Color expected)
{
var file =
@"P3
10 10
10
0 0 0 1 1 1 2 2 2 3 3 3 4 4 4 5 5 5 6 6 6 7 7 7 8 8 8 9 9 9
1 1 1 2 2 2 3 3 3 4 4 4 5 5 5 6 6 6 7 7 7 8 8 8 9 9 9 0 0 0
2 2 2 3 3 3 4 4 4 5 5 5 6 6 6 7 7 7 8 8 8 9 9 9 0 0 0 1 1 1
3 3 3 4 4 4 5 5 5 6 6 6 7 7 7 8 8 8 9 9 9 0 0 0 1 1 1 2 2 2
4 4 4 5 5 5 6 6 6 7 7 7 8 8 8 9 9 9 0 0 0 1 1 1 2 2 2 3 3 3
5 5 5 6 6 6 7 7 7 8 8 8 9 9 9 0 0 0 1 1 1 2 2 2 3 3 3 4 4 4
6 6 6 7 7 7 8 8 8 9 9 9 0 0 0 1 1 1 2 2 2 3 3 3 4 4 4 5 5 5
7 7 7 8 8 8 9 9 9 0 0 0 1 1 1 2 2 2 3 3 3 4 4 4 5 5 5 6 6 6
8 8 8 9 9 9 0 0 0 1 1 1 2 2 2 3 3 3 4 4 4 5 5 5 6 6 6 7 7 7
9 9 9 0 0 0 1 1 1 2 2 2 3 3 3 4 4 4 5 5 5 6 6 6 7 7 7 8 8 8";
var reader = new StringReader(file);
var canvas = PpmReader.ReadCanvasFromPpm(reader);
var pattern = new UvImage(canvas);
var color = pattern.UvPatternAt(u, v);
Assert.Equal(expected, color);
}
public (World, Camera) Setup(int width, int height, double fov)
{
// ======================================================
// the camera
// ======================================================
var camera = new Camera(width, height, fov)
{
Transform = Transformation.ViewTransform(
new Point(1, 2, -5), // view from
new Point(0, 2, 0), // view to
new Vector(0, 1, 0)), // vector up
ProgressMonitor = new ParallelConsoleProgressMonitor(height),
};
// ======================================================
// light sources
// ======================================================
var light = new PointLight(
new Point(-20, 20, -20),
new Color(1, 1, 1)
);
var light2 = new PointLight(
new Point(-20, 10, -5),
new Color(1, 1, 1)
);
var areaLight = new AreaLight(
new Point(-100, 100, -100),
new Vector(4, 0, 0),
6,
new Vector(0, 4, 0),
6,
new Color(1.0, 1.0, 1.0)
);
var floor = new Plane()
{
Material = new Material()
{
Color = Color.White,
Ambient = 0.1,
Diffuse = 0.1,
Specular = 0.0,
Reflective = 0.4,
},
};
FileStream stream = File.OpenRead("/Users/rhagan/VSCode Projects/RayTracer/RayTracer.Program/Scenes/Textures/brickwall.ppm");
StreamReader reader = new StreamReader(stream);
var wallTexture = PpmReader.ReadCanvasFromPpm(reader);
var textureLeft = new UvImage(wallTexture);
var textureFront = textureLeft;
var textureRight = textureLeft;
var textureBack = textureLeft;
var textureUp = textureLeft;
var textureDown = textureLeft;
stream = File.OpenRead("/Users/rhagan/VSCode Projects/RayTracer/RayTracer.Program/Scenes/Textures/brickwall_normal.ppm");
reader = new StreamReader(stream);
var wallNormalMap = PpmReader.ReadCanvasFromPpm(reader);
var normalLeft = new UvImage(wallNormalMap);
var normalFront = normalLeft;
var normalRight = normalLeft;
var normalBack = normalLeft;
var normalUp = normalLeft;
var normalDown = normalLeft;
var mapCubeMaterial = new Material()
{
Pattern = new CubeMap(textureLeft, textureFront, textureRight, textureBack, textureUp, textureDown),
NormalMap = new CubeMap(normalLeft, normalFront, normalRight, normalBack, normalUp, normalDown),
Ambient = 0.7,
Specular = 0.0,
Diffuse = 0.8,
};
var box = new Cube()
{
Transform =
Transformation.Translation(0, 2, 0) *
Transformation.Rotation_y(1.9),
Material = mapCubeMaterial,
};
World world = new World();
world.Shapes = new List <Shape> {
floor, box
};
world.Lights = new List <ILight> {
light
};
return(world, camera);
}
public (World, Camera) Setup(int width, int height, double fov)
{
// ======================================================
// the camera
// ======================================================
var camera = new Camera(width, height, fov)
{
Transform = Transformation.ViewTransform(
new Point(1, 2, -7), // view from
new Point(0, 1, 0), // view to
new Vector(0, 1, 0)), // vector up
ProgressMonitor = new ParallelConsoleProgressMonitor(height),
};
// ======================================================
// light sources
// ======================================================
var light = new PointLight(
new Point(-100, 100, -100),
new Color(1, 1, 1)
);
var areaLight = new AreaLight(
new Point(-100, 100, -100),
new Vector(4, 0, 0),
6,
new Vector(0, 4, 0),
6,
new Color(1.0, 1.0, 1.0)
);
var floor = new Plane()
{
Material = new Material()
{
Color = Color.White,
Ambient = 0.1,
Diffuse = 0.1,
Specular = 0.0,
Reflective = 0.4,
},
};
var pedestal = new Cylinder()
{
Minimum = 0.0,
Maximum = 0.1,
IsClosed = true,
Material = new Material()
{
Color = Color.White,
Ambient = 0.1,
Diffuse = 0.2,
Specular = 0.0,
Reflective = 0.1,
},
};
FileStream stream = File.OpenRead("/Users/rhagan/VSCode Projects/RayTracer/RayTracer.Program/Scenes/Textures/earthmap1k.ppm");
StreamReader reader = new StreamReader(stream);
var earthTexture = PpmReader.ReadCanvasFromPpm(reader);
stream = File.OpenRead("/Users/rhagan/VSCode Projects/RayTracer/RayTracer.Program/Scenes/Textures/earthspec1k.ppm");
reader = new StreamReader(stream);
var earthSpecMap = PpmReader.ReadCanvasFromPpm(reader);
stream = File.OpenRead("/Users/rhagan/VSCode Projects/RayTracer/RayTracer.Program/Scenes/Textures/earthbump1k.ppm");
reader = new StreamReader(stream);
var earthBumpMap = PpmReader.ReadCanvasFromPpm(reader);
var earth = new Sphere()
{
Transform =
Transformation.Translation(0, 1.1, 0) *
Transformation.Rotation_y(1.9),
Material = new Material()
{
Pattern = new TextureMap(
new UvImage(earthTexture),
TextureMapper.SphericalMap
),
SpecularMap = new TextureMap(
new UvImage(earthSpecMap),
TextureMapper.SphericalMap
), /*
* BumpMap = new TextureMap(
* new UvImage(earthBumpMap),
* TextureMapper.SphericalMap
* ), */
Ambient = 0.3,
Diffuse = 0.9,
Specular = 0.0,
Shininess = 300,
Reflective = 0.7,
},
};
stream = File.OpenRead("/Users/rhagan/VSCode Projects/RayTracer/RayTracer.Program/Scenes/Textures/earthcloudmap.ppm");
reader = new StreamReader(stream);
var cloudTexture = PpmReader.ReadCanvasFromPpm(reader);
var clouds = new Sphere()
{
Transform =
Transformation.Translation(0, 1.1, 0) *
Transformation.Scaling(1.1, 1.1, 1.1),
Material = new Material()
{
Pattern = new TextureMap(
new UvImage(cloudTexture),
TextureMapper.SphericalMap
),
Diffuse = 0.1,
Specular = 0.0,
Shininess = 100,
Ambient = 0.1,
Transparency = 1.0,
},
HitBy = RayType.NoShadows,
};
World world = new World();
world.Shapes = new List <Shape> {
floor, pedestal, earth
};
world.Lights = new List <ILight> {
light
};
return(world, camera);
}