public void DrawLineBresenham(int x0, int y0, int x1, int y1, double3 color, Func <double3, double3, double3> blendFunc = null)
{
if (Math3.ClampLine(ref x0, ref y0, ref x1, ref y1, Size.width, Size.height))
{
DrawLineBresenhamClamped(x0, y0, x1, y1, color, blendFunc);
}
}
public void RenderRays(double3 xAxis, double3 yAxis, double3 topLeft, double3 bottomLeft)
{
int numRays = NumRaysToDraw.HasValue ? NumRaysToDraw.Value : ViewportSize.height;
int maxRays = Math.Max(numRays, ViewportSize.height);
double3 startP, step;
if (Orientation == SectionOrientation.Horizontal)
{
double hFovX = (AlwaysTakeVerticalFov ? Camera.FovY : Camera.FovX) / 2;
double4x4 rotY = double4x4.RotY(hFovX);
double4x4 rotMinusY = double4x4.RotY(-hFovX);
double3 left = Camera.ViewInvMatrix.Transform(rotMinusY.Transform(double3.UnitZ));
double3 right = Camera.ViewInvMatrix.Transform(rotY.Transform(double3.UnitZ));
step = (right - left) * (1.0 / maxRays);
startP = left + step * 0.5;
}
else
{
double hFovY = Camera.FovY / 2;
double4x4 rotX = double4x4.RotX(hFovY);
double4x4 rotMinusX = double4x4.RotX(-hFovY);
double3 top = Camera.ViewInvMatrix.Transform(rotMinusX.Transform(double3.UnitZ));
double3 bottom = Camera.ViewInvMatrix.Transform(rotX.Transform(double3.UnitZ));
step = (bottom - top) * (1.0 / maxRays);
startP = top + step * 0.5;
}
Scene.TraceCallback = tr => {
double sx = ViewportSize.width / SectionSize.width;
double sy = ViewportSize.height / SectionSize.height;
double3 pV0 = tr.Ray.p - topLeft;
double3 pV1 = tr.NearestIntersect.P - topLeft;
int x0 = ( int )Math.Round(sx * (pV0 & xAxis));
int y0 = ( int )Math.Round(sy * (pV0 & yAxis));
int x1 = ( int )Math.Round(sx * (pV1 & xAxis));
int y1 = ( int )Math.Round(sy * (pV1 & yAxis));
if (Math3.ClampLine(ref x0, ref y0, ref x1, ref y1, ViewportSize.width, ViewportSize.height))
{
image.DrawLineBresenhamClamped(x0, y0, x1, y1, tr.Color);
//image.Values [x0, y0] = 1 - tr.Color;
image.Values [x1, y1] = new double3(1, 1, 0);
}
};
if (numRays == 1)
{
double3 p = startP + step * maxRays * 0.5;
Ray r = new Ray(Camera.Pos, p.Normalized);
Scene.Trace(r, new TraceData(InitTraceData));
}
else
{
ParallelOptions parallelOpts = new ParallelOptions();
parallelOpts.MaxDegreeOfParallelism = MaxDegreeOfParallelism.HasValue ? MaxDegreeOfParallelism.Value : Environment.ProcessorCount;
double xInc = ( double )maxRays / (numRays - 1);
Parallel.For(0, numRays, parallelOpts, x => {
double3 p = startP + step * x * xInc;
Ray r = new Ray(Camera.Pos, p.Normalized);
Scene.Trace(r, new TraceData(InitTraceData));
});
}
}