internal static FloatColour Min(FloatColour value1, FloatColour value2)
{
FloatColour output;
output.R = Math.Min(value1.R, value2.R);
output.G = Math.Min(value1.G, value2.G);
output.B = Math.Min(value1.B, value2.B);
return output;
}
internal static FloatColour Min(FloatColour value1, FloatColour value2)
{
FloatColour output;
output.R = Math.Min(value1.R, value2.R);
output.G = Math.Min(value1.G, value2.G);
output.B = Math.Min(value1.B, value2.B);
return(output);
}
public static FloatColour operator *(FloatColour value, float multiplier)
{
FloatColour output = value;
output.R *= multiplier;
output.G *= multiplier;
output.B *= multiplier;
return(output);
}
public FloatColour TraceRay(Primitive pIgnorePrimitive, Ray tRay, int nDepth)
{
// check whether we have reached maximum recursion depth
if (nDepth > 6)
{
//return new Colour(0, 0, 0);
return(new FloatColour(1));
}
// declare intersection variables
float fClosestIntersectionDistance = float.MaxValue;
Primitive closestIntersectedPrimitive = null;
// loop through all objects in scene
foreach (Primitive primitive in m_pScene.Primitives)
{
// test for intersection
float fDistance;
if (primitive.Intersect(tRay, out fDistance))
{
// check that we are closer than the last intersection
if (fDistance < fClosestIntersectionDistance)
{
// set closest intersection
fClosestIntersectionDistance = fDistance;
closestIntersectedPrimitive = primitive;
}
}
}
// if nothing was intersected, set to background colour
FloatColour tColour = new FloatColour(Color.CornflowerBlue);
if (closestIntersectedPrimitive != null) // test for intersection
{
tColour = closestIntersectedPrimitive.Shade(this,
tRay, fClosestIntersectionDistance, nDepth + 1);
}
tColour = FloatColour.Min(tColour, new FloatColour(1));
// return colour
return(tColour);
}
public bool ProcessFrame()
{
// loop through all pixels
for (int y = 0; y < _height; y++)
{
for (int x = 0; x < _width; x++)
{
// set direction of ray
Ray tPrimaryRay = _camera.GetUnprojectedRay(x, y);
// trace ray (this is recursive)
FloatColour tColour = TraceRay(null, tPrimaryRay, 0);
// set colour of pixels in bitmap
m_pImage[x, y] = tColour;
}
}
return(true);
}
public FloatColour TraceRay(Primitive pIgnorePrimitive, Ray tRay, int nDepth)
{
// check whether we have reached maximum recursion depth
if (nDepth > 6)
{
//return new Colour(0, 0, 0);
return new FloatColour(1);
}
// declare intersection variables
float fClosestIntersectionDistance = float.MaxValue;
Primitive closestIntersectedPrimitive = null;
// loop through all objects in scene
foreach (Primitive primitive in m_pScene.Primitives)
{
// test for intersection
float fDistance;
if (primitive.Intersect(tRay, out fDistance))
{
// check that we are closer than the last intersection
if (fDistance < fClosestIntersectionDistance)
{
// set closest intersection
fClosestIntersectionDistance = fDistance;
closestIntersectedPrimitive = primitive;
}
}
}
// if nothing was intersected, set to background colour
FloatColour tColour = new FloatColour(Color.CornflowerBlue);
if (closestIntersectedPrimitive != null) // test for intersection
{
tColour = closestIntersectedPrimitive.Shade(this,
tRay, fClosestIntersectionDistance, nDepth + 1);
}
tColour = FloatColour.Min(tColour, new FloatColour(1));
// return colour
return tColour;
}
