public PlanePrimitive(Vector3F normal, float distance)
{
PrimitiveType = PrimitiveType.Plane;
Normal = normal;
Distance = distance;
}
public override Vector3F GetNormal(Vector3F position)
{
var x = position.X - Center.X == 0.0f ? 0 : Math.Sign(Center.X - position.X);
var y = position.Y - Center.Y == 0.0f ? 0 : Math.Sign(Center.Y - position.Y);
var z = position.Z - Center.Z == 0.0f ? 0 : Math.Sign(Center.Z - position.Z);
return new Vector3F(x, y, z);
}
public SpherePrimitive(Vector3F center, float radius)
{
Center = center;
Radius = radius;
SquareRadius = radius * radius;
RRadius = 1.0f / radius;
PrimitiveType = PrimitiveType.Sphere;
}
public override bool Render()
{
// Render scene
var o = new Vector3F(0.0f, 0.0f, -5.0f);
// Initialize timer
var msecs = Environment.TickCount;
// Render remaining lines
for (var lineY = _currLine; lineY < (Height); lineY++)
{
_sx = _worldX1;
// Render pixels for current line
for (var lineX = 0; lineX < Width; lineX++)
{
// Fire primary ray
var dir = new Vector3F(_sx, _sy, 0.0f) - o;
dir.Normalize();
var r = new Ray(o, dir);
var acc = Raytrace(r, 1);
var red = (int)(acc.X * 256);
var green = (int)(acc.Y * 256);
var blue = (int)(acc.Z * 256);
if (red > 255) red = 255;
if (green > 255) green = 255;
if (blue > 255) blue = 255;
PixelBuffer[_pPos++] = (uint)((red << 16) + (green << 8) + blue);
_sx += _deltaX;
}
_sy += _deltaY;
// See if we've been working to long already
if ((Environment.TickCount - msecs) > 100)
{
// return control to windows so the screen gets updated
_currLine = lineY + 1;
return false;
}
}
// all done
return true;
}
public override Vector3F GetNormal(Vector3F position)
{
return Normal;
}
public BoxPrimitive(Vector3F min, Vector3F max)
{
Min = min;
Max = max;
}
public BoxPrimitive()
{
PrimitiveType = PrimitiveType.Box;
Min = new Vector3F(0);
Max = new Vector3F(1);
}
public override Vector3F GetNormal(Vector3F position)
{
return (position - Center) * RRadius;
}
/// <summary>
/// Initializes the scene.
/// </summary>
public void InitScene()
{
dynamic json = JsonConvert.DeserializeObject(File.ReadAllText("scene.json"));
#region Read materials from json
var defaultColor = new Color(0.2f, 0.2f, 0.2f);
const float defaultReflection = 0.0f;
const float defaultDiffuse = 0.2f;
var materialList = new List<Material>();
var materials = json.materials;
foreach (var material in materials)
{
materialList.Add(new Material
{
Name = material.name,
Color = material.color == null ? defaultColor : new Color((float)material.color[0], (float)material.color[1], (float)material.color[2]),
Diffuse = material.diffuse ?? defaultDiffuse,
Reflection = material.reflection ?? defaultReflection
});
}
#endregion Read materials from json
#region Read primitives from json
var primitives = json.primitives;
foreach (var primitive in primitives)
{
var primitiveType = (PrimitiveType)primitive.primitiveType;
Primitive newPrimitive;
switch (primitiveType)
{
case PrimitiveType.Box:
var min = new Vector3F((float)primitive.min[0], (float)primitive.min[1], (float)primitive.min[2]);
var max = new Vector3F((float)primitive.max[0], (float)primitive.max[1], (float)primitive.max[2]);
newPrimitive = new BoxPrimitive(min, max)
{
Name = primitive.name,
IsLight = primitive.isLight ?? false,
Material = materialList.FirstOrDefault(x => x.Name == (string)primitive.material)
};
break;
case PrimitiveType.Plane:
var normal = new Vector3F((float)primitive.normal[0], (float)primitive.normal[1], (float)primitive.normal[2]);
float distance = primitive.distance ?? 0.0f;
newPrimitive = new PlanePrimitive(normal, distance)
{
Name = primitive.name,
IsLight = primitive.isLight ?? false,
Material = materialList.FirstOrDefault(x => x.Name == (string)primitive.material)
};
break;
case PrimitiveType.Sphere:
var center = new Vector3F((float)primitive.center[0], (float)primitive.center[1], (float)primitive.center[2]);
float radius = primitive.radius ?? 0.0f;
newPrimitive = new SpherePrimitive(center, radius)
{
Name = primitive.name,
IsLight = primitive.isLight ?? false,
Material = materialList.FirstOrDefault(x => x.Name == (string)primitive.material)
};
break;
default:
throw new ArgumentException("Invalid primitive type!");
}
Primitives.Add(newPrimitive);
}
#endregion Read primitives from json
}
public float Dot(Vector3F vector)
{
return Dot(this, vector);
}
public Vector3F Cross(Vector3F b)
{
return new Vector3F(Y * b.Z - Z * b.Y, Z * b.X - X * b.Z, X * b.Y - Y * b.X);
}
/// <summary>
/// Calculates the dot product of two vectors a and b.
/// </summary>
/// <param name="vector1">a.</param>
/// <param name="vector2">The b.</param>
/// <returns></returns>
public static float Dot(Vector3F vector1, Vector3F vector2)
{
return vector1.X * vector2.X + vector1.Y * vector2.Y + vector1.Z * vector2.Z;
}
