public RTF.Canvas DrawRedCircle(RTF.Shapes.Sphere s)
{
var rayOrigin = RTF.PointType.Point(0, 0, -5);
double wallZ = 10;
double wallSize = 7;
var canvasPixel = 100;
double pixelSize = (double)wallSize / (double)canvasPixel;
double half = wallSize / 2;
var canvas = new RTF.Canvas(canvasPixel, canvasPixel, new RTF.Color(0, 0, 0));
var color = new RTF.Color(255, 0, 0);
var shape = s;
for (int y = 0; y < canvasPixel; y++)
{
var worldY = half - pixelSize * y;
for (int x = 0; x < canvasPixel; x++)
{
var worldX = -half + pixelSize * x;
var position = RTF.PointType.Point(worldX, worldY, wallZ);
var r = new RTF.Ray(rayOrigin, (position - rayOrigin).Normalize());
var xs = shape.Intersect(r);
var hit = RTF.Intersection.Hit(xs);
if (hit != null)
{
canvas.WritePixel(x, y, color);
}
}
}
return(canvas);
}
private void RotationScalingButton_Click(object sender, RoutedEventArgs e)
{
var s = new RTF.Shapes.Sphere
{
Transform = RTH.Transformations.Scaling(0.5, 1, 1) * RTH.Transformations.RotationZ(Math.PI / 4)
};
var canvas = CreateCircle(s);
canvas.SaveAsPPMFile(FolderPath.Text + "\\Light[Rotation Scaling].ppm");
}
private void ScalingYButton_Click(object sender, RoutedEventArgs e)
{
var s = new RTF.Shapes.Sphere
{
Transform = RTH.Transformations.Scaling(1, 0.5, 1)
};
var canvas = CreateCircle(s);
canvas.SaveAsPPMFile(FolderPath.Text + "\\Light[Scaling Y].ppm");
}
private void ScalingXButton_Click(object sender, RoutedEventArgs e)
{
var s = new RTF.Shapes.Sphere
{
Transform = RTH.Transformations.Scaling(0.5, 1, 1)
};
var canvas = DrawRedCircle(s);
canvas.SaveAsPPMFile(FolderPath.Text + "\\RaySphereIntersections[Scaling X].ppm");
}
public RTF.Canvas CreateCircle(RTF.Shapes.Sphere s)
{
var lightPos = RTF.PointType.Point(-10, 10, -10);
var light = new RTF.Light(lightPos, RTF.Color.White);
var rayOrigin = RTF.PointType.Point(0, 0, -5);
double wallZ = 10;
double wallSize = 7;
var canvasPixel = 100;
double pixelSize = wallSize / canvasPixel;
double half = wallSize / 2;
var canvas = new RTF.Canvas(canvasPixel, canvasPixel, RTF.Color.Black);
var shape = s;
shape.Material.Color = RTF.Color.Magenta;
for (int y = 0; y < canvasPixel; y++)
{
var worldY = half - pixelSize * y;
for (int x = 0; x < canvasPixel; x++)
{
var worldX = -half + pixelSize * x;
var position = RTF.PointType.Point(worldX, worldY, wallZ);
var r = new RTF.Ray(rayOrigin, (position - rayOrigin).Normalize());
var xs = shape.Intersect(r);
var hit = RTF.Intersection.Hit(xs);
if (hit != null)
{
var point = RTH.Transformations.Position(r, hit.T);
var normal = hit.Object.NormalAt(point);
var eye = -r.Direction;
var color = RTF.Light.Lighting(
(hit.Object as RTF.Shapes.Sphere).Material,
hit.Object,
light,
point,
eye,
normal,
false);
canvas.WritePixel(x, y, color);
}
}
}
return(canvas);
}
public RTF.Canvas CreateCircle()
{
var ceilling = new RTF.Shapes.Plane()
{
Material = new RTF.Material()
{
Color = new RTF.Color(1, 0.9, 0.9),
Specular = 0
}
};
var middle = new RTF.Shapes.Sphere()
{
Transform = transform.Translation(-0.5, 1, 0.5),
Material = new RTF.Material(RTF.Color.Purple, 0.7, 0.3)
};
var right = new RTF.Shapes.Sphere()
{
Transform = transform.Translation(1.5, 0.5, -0.5) * transform.Scaling(0.5, 0.5, 0.5),
Material = new RTF.Material(RTF.Color.Lime, 0.7, 0.3)
};
var left = new RTF.Shapes.Sphere()
{
Transform = transform.Translation(-1.5, 0.33, -0.75) * transform.Scaling(0.33, 0.33, 0.33),
Material = new RTF.Material(RTF.Color.Cyan, 0.7, 0.3)
};
var world = new RTF.World
{
Lights = new List <RTF.Light>()
{
new RTF.Light(point.Point(-10, 10, -10), RTF.Color.White)
},
Objects = new List <RTF.Shapes.Shape>()
{
ceilling, right, middle, right, left
}
};
var camera = new RTF.Camera(200, 100, Math.PI / 3)
{
Transform = transform.ViewTransform(
point.Point(0, 1.5, -5),
point.Point(0, 1, 0),
point.Vector(0, 1, 0))
};
return(RTF.Canvas.Render(camera, world));
}
public RTF.Canvas CreatingPerturbedSphere()
{
var p_ceiling = new RTF.Patterns.Checker(RTF.Color.Black, RTF.Color.White);
var ceilling = new RTF.Shapes.Plane()
{
Material = new RTF.Material()
{
Pattern = new RTF.Patterns.Perturbed(p_ceiling),
Color = RTF.Color.Black,
Specular = 0
}
};
var p_sphere = new RTF.Patterns.Ring(RTF.Color.Purple, RTF.Color.Pink);
var middle = new RTF.Shapes.Sphere()
{
Transform = transform.Translation(-0.5, 1, 0.5),
Material = new RTF.Material()
{
Pattern = new RTF.Patterns.Perturbed(p_sphere),
Color = RTF.Color.Black,
Specular = 0
}
};
var world = new RTF.World
{
Lights = new List <RTF.Light>()
{
new RTF.Light(point.Point(-10, 10, -10), RTF.Color.White)
},
Objects = new List <RTF.Shapes.Shape>()
{
ceilling, middle
}
};
var camera = new RTF.Camera(400, 200, Math.PI / 3)
{
Transform = transform.ViewTransform(
point.Point(0, 1.5, -5),
point.Point(0, 1, 0),
point.Vector(0, 1, 0))
};
return(RTF.Canvas.Render(camera, world));
}
public RTF.Canvas CreateWorld()
{
var ceilling = new RTF.Shapes.Plane()
{
Material = new RTF.Material()
{
Color = new RTF.Color(1, 0.9, 0.9),
Specular = 0
}
};
var middle = new RTF.Shapes.Sphere()
{
Transform = transform.Translation(-0.5, 1, 0.5),
Material = new RTF.Material()
{
Color = RTF.Color.Green,
Diffuse = 0.1,
Specular = 1,
Transparency = 1,
Shininess = 300,
Reflective = 0.9
}
};
var world = new RTF.World
{
Lights = new List <RTF.Light>()
{
new RTF.Light(point.Point(-10, 10, -10), RTF.Color.White)
},
Objects = new List <RTF.Shapes.Shape>()
{
ceilling, middle
}
};
var camera = new RTF.Camera(200, 100, Math.PI / 3)
{
Transform = transform.ViewTransform(
point.Point(0, 1.5, -5),
point.Point(0, 1, 0),
point.Vector(0, 1, 0))
};
return(RTF.Canvas.Render(camera, world));
}
