/// <summary>
///
/// </summary>
/// <param name="job"></param>
private unsafe void RenderJob(RenderingJob job)
{
var threadColor = GetThreadColor();
var pixelColor = (ColorRGB *)job.OutputOffset;
var widthIterator = job.Camera.PixelWidthIterator;
var heightIterator = job.Camera.PixelHeightIterator;
var imageOrigin = job.Camera.ImageOrigin;
var cameraPosition = job.Camera.Position;
var jobOffsetPosition = job.OffsetPosition;
var jobSize = job.Size;
var ray = new Ray();
var threadDebugging = ThreadDebugging;
if (!threadDebugging)
{
threadColor = ColorRGB.White;
}
var jobColorBuffer = job.ColorBuffer;
var jobColorBufferIndex = 0;
var cornerSize = 8;
var jobDebugging = JobDebugging;
if (jobDebugging)
{
#region paint margin as white rectangle
//jobColorBuffer = new ColorRGB[jobSize.X * 2 + (jobSize.Y - 2) * 2];
//// bottom line
//for (var jobx = 0; jobx < jobSize.X; jobx++, pixelColor++)
// (*pixelColor) = marginColor;
//pixelColor += job.NextOutputLineOffset;
//// left and right margin
//for (var joby = 1; joby < jobSize.Y - 1; joby++, pixelColor += job.NextOutputLineOffset + 1)
//{
// (*pixelColor) = marginColor;
// pixelColor += (jobSize.X - 1);
// (*pixelColor) = marginColor;
//}
//// top line
//for (var jobx = 0; jobx < jobSize.X; jobx++, pixelColor++)
// (*pixelColor) = marginColor;
#endregion
#region paint corners of job
// bottom parts of corners
for (var jobx = 0; jobx < cornerSize; jobx++, pixelColor++)
{
(*pixelColor) = threadColor;
}
pixelColor += jobSize.X - cornerSize * 2;
for (var jobx = 0; jobx < cornerSize; jobx++, pixelColor++)
{
(*pixelColor) = threadColor;
}
pixelColor += job.NextOutputLineOffset;
// bottom left and right parts of corners
for (var joby = 1; joby < cornerSize; joby++, pixelColor += job.NextOutputLineOffset + 1)
{
(*pixelColor) = threadColor;
pixelColor += (jobSize.X - 1);
(*pixelColor) = threadColor;
}
// top left and right parts of corners
pixelColor += ((job.NextOutputLineOffset + 1) + (jobSize.X - 1)) * (jobSize.Y - cornerSize * 2);
for (var joby = 1; joby < cornerSize; joby++, pixelColor += job.NextOutputLineOffset + 1)
{
(*pixelColor) = threadColor;
pixelColor += (jobSize.X - 1);
(*pixelColor) = threadColor;
}
// top parts of corners
for (var jobx = 0; jobx < cornerSize; jobx++, pixelColor++)
{
(*pixelColor) = threadColor;
}
pixelColor += jobSize.X - cornerSize * 2;
for (var jobx = 0; jobx < cornerSize; jobx++, pixelColor++)
{
(*pixelColor) = threadColor;
}
pixelColor += job.NextOutputLineOffset;
#endregion
pixelColor = (ColorRGB *)job.OutputOffset;
}
// .
// /|\
// |
for (var joby = 0; joby < jobSize.Y; joby++, pixelColor += job.NextOutputLineOffset)
{
// \
// -----
// /
for (var jobx = 0; jobx < jobSize.X; jobx++, pixelColor++)
{
// create ray for pixel at [x,y]
ray.Prepare(cameraPosition, ((widthIterator * (jobx + jobOffsetPosition.X) + heightIterator * (joby + jobOffsetPosition.Y) + imageOrigin) - cameraPosition).Normalize());
//ray.Pixel.X = jobx + job.OffsetPosition.X;
//ray.Pixel.Y = joby + job.OffsetPosition.Y;
// trace scene
RayTracer.Trace(ray);
if (threadDebugging)
{
ray.Color *= threadColor;
}
if (jobDebugging)
{
#region paint margin with real colors
//if (jobx == 0 || jobx == jobSize.X - 1 || joby == 0 || joby == jobSize.Y - 1)
//{
// jobColorBuffer[colorBufferIndex] = ray.Color;
// colorBufferIndex++;
// continue;
//}
#endregion
#region corner colors
if (((joby == 0 || joby == jobSize.Y - 1) && (jobx < cornerSize || jobx >= jobSize.X - cornerSize)) || ((jobx == 0 || jobx == jobSize.X - 1) && (joby < cornerSize || joby >= jobSize.Y - cornerSize)))
{
jobColorBuffer[jobColorBufferIndex] = ray.Color;
jobColorBufferIndex++;
continue;
}
#endregion
}
(*pixelColor) = ray.Color;
}
}
if (jobDebugging)
{
pixelColor = (ColorRGB *)job.OutputOffset;
jobColorBufferIndex = 0;
#region paint margin with real colors
//// bottom line
//for (var jobx = 0; jobx < jobSize.X; jobx++, pixelColor++, colorBufferIndex++)
// (*pixelColor) = jobColorBuffer[colorBufferIndex];
//pixelColor += job.NextOutputLineOffset;
//// left and right margin
//for (var joby = 1; joby < jobSize.Y - 1; joby++, pixelColor += job.NextOutputLineOffset + 1)
//{
// (*pixelColor) = jobColorBuffer[colorBufferIndex];
// colorBufferIndex++;
// pixelColor += (jobSize.X - 1);
// (*pixelColor) = jobColorBuffer[colorBufferIndex];
// colorBufferIndex++;
//}
//// top line
//for (var jobx = 0; jobx < jobSize.X; jobx++, pixelColor++, colorBufferIndex++)
// (*pixelColor) = jobColorBuffer[colorBufferIndex];
#endregion
#region paint corners of job
// bottom parts of corners
for (var jobx = 0; jobx < cornerSize; jobx++, pixelColor++, jobColorBufferIndex++)
{
(*pixelColor) = jobColorBuffer[jobColorBufferIndex];
}
pixelColor += jobSize.X - cornerSize * 2;
for (var jobx = 0; jobx < cornerSize; jobx++, pixelColor++, jobColorBufferIndex++)
{
(*pixelColor) = jobColorBuffer[jobColorBufferIndex];
}
pixelColor += job.NextOutputLineOffset;
// bottom left and right parts of corners
for (var joby = 1; joby < cornerSize; joby++, pixelColor += job.NextOutputLineOffset + 1)
{
(*pixelColor) = jobColorBuffer[jobColorBufferIndex];
jobColorBufferIndex++;
pixelColor += (jobSize.X - 1);
(*pixelColor) = jobColorBuffer[jobColorBufferIndex];
jobColorBufferIndex++;
}
// top left and right parts of corners
pixelColor += ((job.NextOutputLineOffset + 1) + (jobSize.X - 1)) * (jobSize.Y - cornerSize * 2);
for (var joby = 1; joby < cornerSize; joby++, pixelColor += job.NextOutputLineOffset + 1)
{
(*pixelColor) = jobColorBuffer[jobColorBufferIndex];
jobColorBufferIndex++;
pixelColor += (jobSize.X - 1);
(*pixelColor) = jobColorBuffer[jobColorBufferIndex];
jobColorBufferIndex++;
}
// top parts of corners
for (var jobx = 0; jobx < cornerSize; jobx++, pixelColor++, jobColorBufferIndex++)
{
(*pixelColor) = jobColorBuffer[jobColorBufferIndex];
}
pixelColor += jobSize.X - cornerSize * 2;
for (var jobx = 0; jobx < cornerSize; jobx++, pixelColor++, jobColorBufferIndex++)
{
(*pixelColor) = jobColorBuffer[jobColorBufferIndex];
}
pixelColor += job.NextOutputLineOffset;
#endregion
}
if (threadDebugging)
{
var invThreaColor = threadColor.Inv();
pixelColor = (ColorRGB *)job.OutputOffset;
for (var joby = 0; joby < jobSize.Y; joby++, pixelColor += job.NextOutputLineOffset)
{
for (var jobx = 0; jobx < jobSize.X; jobx++, pixelColor++)
{
(*pixelColor) = (*pixelColor) * invThreaColor;
}
}
}
}
public void Calculate()
{
// главный цикл по лучам
for (var iteration = 0; iteration < NRays; iteration++)
{
// определяем источник
var light = this.RouletteLight();
// розыгрыш луча от источника
var ray = light.RandomRay();
//ray = new LightRay( light.Position, new Vector( -0f, -0f, -1.0f, true ), new Spectrum( 1f ) );
var wMinFact = ray.Illuminance.ValueMax * WMin;
// основной блуждания луча
int rayIteration = 0;
while (ray.Illuminance.ValueMax > wMinFact && rayIteration < 8)
{
rayIteration++;
// ищем пересечение с элементом сцены
var intersection = RayTracer.Trace(ray.From, ray.Direction, Constants.Epsilon);
while (intersection != null && intersection.Face.Material.Reflectance == null)
{
if (intersection.Face.Material.Mirror != null)
{
var mirrorRay = Vector.Reflect(ray.Direction, intersection.Face.Normal);
mirrorRay.Normalize();
ray.From = intersection.Point;
ray.Direction = mirrorRay;
intersection = this.RayTracer.Trace(ray.From, ray.Direction, Constants.Epsilon);
}
else
{
throw new NotImplementedException();
}
}
if (intersection == null)
{
break;
}
//RayDebugStaticCollection.Add( new Ray( ray.From, intersection.Point ), Color.Blue );
//this.Log.Message( string.Format( "Ray.From = {0}, Ray.To = {1}", ray.From, intersection.Point ) );
var intersectionNormal = intersection.Face.Normal;
var intesectionPointOcclude = intersection.Point + intersectionNormal * Constants.Epsilon;
// для всех расчетных точек производимы вычисления
foreach (var obj in Scene.Objects)
{
foreach (var vertex in obj.Vertices)
{
var renderPointNormal = vertex.Face.Normal;
if (vertex.Face == intersection.Face)
{
continue;
}
var dnormals = intersection.Face.Normal - renderPointNormal;
if (Math.Abs(dnormals.X) < Constants.Epsilon && Math.Abs(dnormals.Y) < Constants.Epsilon && Math.Abs(dnormals.Z) < Constants.Epsilon)
{
continue;
}
var mr = (new Vector(intersection.Point, vertex.Point).Reflect(vertex.Face.Normal));
//RayDebugStaticCollection.Add( new Ray( intersection.Point, vertex.Point ), Color.Green );
//RayDebugStaticCollection.Add( new Ray( vertex.Point,mr ), Color.Red );
//if (point.Obj.Name == "Box2")
//{
// point.Illuminance = new Spectrum(1f, 0, 0);
// continue;
//}
//if ( Vector.Dot( intersectionNormal, renderPointNormal ) > Constants.Epsilon )
//{
// vertex.CounterVisibleNormals++;
// continue;
//}
var pointOcclude = vertex.Point;
// направление от точки до точки рендеринга
var r2 = Point3D.LenghtSquared(intesectionPointOcclude, pointOcclude);
var coreDirection = new Vector(intesectionPointOcclude, pointOcclude, true);
//var occludeRayLength = (float)Math.Sqrt( r2 ) - Constants.Epsilon;
//r2 = Point3D.LenghtSquared(intesectionPointOcclude, point.Position );
var occludeRayLength = (float)Math.Sqrt(r2) - Constants.Epsilon;
if (this.RayTracer.Occluded(intesectionPointOcclude, coreDirection, 0, occludeRayLength))
{
//vertex.CounterOccluded++;
continue;
}
//if ( this.RayTracer.Occluded( intersection.Point, coreDirection, Constants.Epsilon, occludeRayLength ) )
// continue;
var cos1 = (Vector.Dot(coreDirection, intersectionNormal));
var cos2 = Math.Abs(Vector.Dot(coreDirection, renderPointNormal));
/*
* if ( cos1 < Constants.Epsilon2 )
* vertex.CounterRaysCos1Zero++;
* if ( cos2 < Constants.Epsilon )
* vertex.CounterRaysCos2Zero++;
*/
cos1 = Math.Abs(cos1);
cos2 = Math.Abs(cos2);
var sigma1 = intersection.Face.Material.Reflectance.BRDF(ray.Direction, intersectionNormal, coreDirection);
if (sigma1.ValueMax > 0)
{
cos1 = Math.Abs(cos1);
}
var kernel1 = sigma1 * cos1 * cos2 / r2;
//var kernel1 = intersection.Face.Material.BRDF( ray.Direction, intersection.Face.Normal,
// core1Direction );
//var kernel1 = new Spectrum( sigma1 );
//kernel1.Multiplication( cos1 * cos2 / r2 );
// Ядро 2. Переход из суб. точки в искомое направление
for (int i = 0; i < vertex.IlluminanceAngles.Directions.Count; i++)
{
var sigma2 = vertex.Face.Material.Reflectance.BRDF(coreDirection, renderPointNormal, vertex.IlluminanceAngles.Directions[i]);
var kernel2 = sigma2;
var q = ray.Illuminance * kernel1 * kernel2;
if (float.IsNaN(q.R) || float.IsNaN(q.G) || float.IsNaN(q.B))
{
q = new Spectrum( );
}
vertex.IlluminanceIndirect[i] += q;
}
}
}
var newDirection = intersection.Face.Material.Reflectance.RandomReflectedDirection(ray.Direction,
intersectionNormal);
var brdf = intersection.Face.Material.Reflectance.BRDF(ray.Direction, intersectionNormal, newDirection);
ray = new LightRay(intersection.Point, newDirection, ray.Illuminance * brdf);
/*
* if (rayIteration == 1)
* ray = new LightRay(ray.From, new Vector(1f, 0, 1f), ray.Illuminance);
* else if ( rayIteration == 2 )
* ray = new LightRay( ray.From, new Vector( -0.85f, 1.5f, 1.5f, true ), ray.Illuminance );
*
* */
}
if (iteration % 10 == 0)
{
Log.Message(string.Format("Render {0} rays", iteration), 1);
}
}
const float XXXX = 0.25f;
const float norm = 4 * Constants.PI * XXXX;
foreach (var obj in Scene.Objects)
{
foreach (var vertex in obj.Vertices)
{
for (int i = 0; i < vertex.IlluminanceAngles.Directions.Count; i++)
{
vertex.IlluminanceIndirect[i] *= (norm / (NRays * Constants.PI * Constants.PI));
}
}
}
}
