private RTCf.Canvas GenerateProjectile(int width, int height)
{
var canvas = new RTCf.Canvas(width, height, black);
var m = double.Parse(Magnetude.Text);
var vel = new Tuple <double, double, double>(
double.Parse(VelocityX.Text),
double.Parse(VelocityY.Text),
double.Parse(VelocityZ.Text));
var proj = new obj.Projectile(
RTCf.PointType.Point(0, 1, 0),
RTCf.PointType.Vector(vel.Item1, vel.Item2, vel.Item3).Normalize() * m);
var env = new obj.Environment(
RTCf.PointType.Vector(0, -0.1, 0),
RTCf.PointType.Vector(-0.01, 0, 0));
canvas.WritePixel((int)proj.Position.X, (height - 1) - (int)proj.Position.Y, red);
foreach (var coord in obj.Projectile.GetTick(env, proj))
{
canvas.WritePixel((int)coord.X, (height - 1) - (int)coord.Y, red);
}
return(canvas);
}
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);
}
public void ConstructPPMPixelData()
{
var expected = "255 0 0 0 0 0 0 0 0 0 0 0 0 0 0\n" +
"0 0 0 0 0 0 0 128 0 0 0 0 0 0 0\n" +
"0 0 0 0 0 0 0 0 0 0 0 0 0 0 255";
var c = new RTF.Canvas(5, 3);
var c1 = new RTF.Color(1.5, 0, 0);
var c2 = new RTF.Color(0, 0.5, 0);
var c3 = new RTF.Color(-0.5, 0, 1);
c.WritePixel(0, 0, c1);
c.WritePixel(2, 1, c2);
c.WritePixel(4, 2, c3);
Assert.Equal(expected, string.Join("\n", c.CreatePPMCanvas()));
}
public void WritingPixelToCanvas()
{
var c = new RTF.Canvas(10, 20);
var red = new RTF.Color(1, 0, 0);
c.WritePixel(2, 3, red);
Assert.Equal(red, c.PixelAt(2, 3));
}
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 ConvertPointsToCanvas(List <RTF.PointType> points, int width, int height)
{
RTF.Canvas c = new RTF.Canvas(width, height, new RTF.Color(0, 0, 0));
var radius = (3d / 8d) * width;
var color = new RTF.Color(255, 255, 255);
foreach (var point in points)
{
int x = (int)((radius * point.X) + width / 2);
int y = (int)((radius * point.Z) + height / 2);
c.WritePixel(x, y, color);
}
return(c);
}
