private unsafe void FillTriangleWithShadow(byte *imageData, Triangle3DElement triangle, Camera camera, List <ILightSource> lights, List <Triangle3DElement> shadowers)
{
Point[] triangle2D = triangle.GetProjection();
int minX = int.MaxValue;
int minY = int.MaxValue;
int maxX = int.MinValue;
int maxY = int.MinValue;
for (int i = 0; i < triangle2D.Length; i++)
{
triangle2D[i] = new Point((triangle2D[i].X - camera.TopLeft.X) / camera.Size.Width * this.RenderWidth, (triangle2D[i].Y - camera.TopLeft.Y) / camera.Size.Height * this.RenderHeight);
minX = Math.Min(minX, (int)triangle2D[i].X);
minY = Math.Min(minY, (int)triangle2D[i].Y);
maxX = Math.Max(maxX, (int)Math.Ceiling(triangle2D[i].X));
maxY = Math.Max(maxY, (int)Math.Ceiling(triangle2D[i].Y));
}
minX = Math.Max(minX, 0);
minY = Math.Max(minY, 0);
maxX = Math.Min(maxX, this.RenderWidth - 1);
maxY = Math.Min(maxY, this.RenderHeight - 1);
List <Triangle3DElement> otherShadowers = new List <Triangle3DElement>(shadowers.Count);
for (int i = 0; i < shadowers.Count; i++)
{
if (shadowers[i] != triangle)
{
otherShadowers.Add(shadowers[i]);
}
}
int totalPixels = (maxX - minX + 1) * (maxY - minY + 1);
Parallel.For(0, totalPixels, index =>
{
int y = index / (maxX - minX + 1) + minY;
int x = index % (maxX - minX + 1) + minX;
if (Intersections2D.PointInTriangle(x, y, triangle2D[0], triangle2D[1], triangle2D[2]))
{
Point3D correspPoint = camera.Deproject(new Point((double)x / this.RenderWidth * camera.Size.Width + camera.TopLeft.X, (double)y / this.RenderHeight * camera.Size.Height + camera.TopLeft.Y), triangle);
double zDepth = camera.ZDepth(correspPoint);
int prevZIndexBuffer = ZIndexBuffer[y * RenderWidth + x];
if (prevZIndexBuffer < triangle.ZIndex || (prevZIndexBuffer == triangle.ZIndex && ZBuffer[y * RenderWidth + x] > zDepth))
{
(byte R, byte G, byte B, byte A) = GetPixelColorWithShadow(triangle, lights, otherShadowers, x, y, correspPoint, camera);
if (A == 255)
{
imageData[y * RenderWidth * 4 + x * 4] = R;
imageData[y * RenderWidth * 4 + x * 4 + 1] = G;
imageData[y * RenderWidth * 4 + x * 4 + 2] = B;
imageData[y * RenderWidth * 4 + x * 4 + 3] = A;
}
else
{
BlendFront(ref imageData[y * RenderWidth * 4 + x * 4], ref imageData[y * RenderWidth * 4 + x * 4 + 1], ref imageData[y * RenderWidth * 4 + x * 4 + 2], ref imageData[y * RenderWidth * 4 + x * 4 + 3], R, G, B, A);
}
ZBuffer[y * RenderWidth + x] = zDepth;
ZIndexBuffer[y * RenderWidth + x] = triangle.ZIndex;
}
else if (imageData[y * RenderWidth * 4 + x * 4 + 3] < 255)
{
(byte R, byte G, byte B, byte A) = GetPixelColorWithShadow(triangle, lights, otherShadowers, x, y, correspPoint, camera);
BlendBack(R, G, B, A, ref imageData[y * RenderWidth * 4 + x * 4], ref imageData[y * RenderWidth * 4 + x * 4 + 1], ref imageData[y * RenderWidth * 4 + x * 4 + 2], ref imageData[y * RenderWidth * 4 + x * 4 + 3]);
}
}
});
}
private unsafe void FillTriangle(byte *imageData, Triangle3DElement triangle, Camera camera, List <ILightSource> lights, List <double> obstructions)
{
Point[] triangle2D = triangle.GetProjection();
int minX = int.MaxValue;
int minY = int.MaxValue;
int maxX = int.MinValue;
int maxY = int.MinValue;
for (int i = 0; i < triangle2D.Length; i++)
{
triangle2D[i] = new Point((triangle2D[i].X - camera.TopLeft.X) / camera.Size.Width * this.RenderWidth, (triangle2D[i].Y - camera.TopLeft.Y) / camera.Size.Height * this.RenderHeight);
minX = Math.Min(minX, (int)triangle2D[i].X);
minY = Math.Min(minY, (int)triangle2D[i].Y);
maxX = Math.Max(maxX, (int)Math.Ceiling(triangle2D[i].X));
maxY = Math.Max(maxY, (int)Math.Ceiling(triangle2D[i].Y));
}
minX = Math.Max(minX, 0);
minY = Math.Max(minY, 0);
maxX = Math.Min(maxX, this.RenderWidth - 1);
maxY = Math.Min(maxY, this.RenderHeight - 1);
int totalPixels = (maxX - minX + 1) * (maxY - minY + 1);
Parallel.For(0, totalPixels, index =>
{
int y = index / (maxX - minX + 1) + minY;
int x = index % (maxX - minX + 1) + minX;
if (Intersections2D.PointInTriangle(x, y, triangle2D[0], triangle2D[1], triangle2D[2]))
{
Point3D correspPoint = camera.Deproject(new Point((double)x / this.RenderWidth * camera.Size.Width + camera.TopLeft.X, (double)y / this.RenderHeight * camera.Size.Height + camera.TopLeft.Y), triangle);
double zDepth = camera.ZDepth(correspPoint);
int prevZIndexBuffer = ZIndexBuffer[y * RenderWidth + x];
if (prevZIndexBuffer < triangle.ZIndex || (prevZIndexBuffer == triangle.ZIndex && ZBuffer[y * RenderWidth + x] > zDepth))
{
byte R = 0;
byte G = 0;
byte B = 0;
byte A = 0;
for (int i = 0; i < triangle.Fill.Count; i++)
{
Colour col = triangle.Fill[i].GetColour(correspPoint, triangle.GetNormalAt(correspPoint), camera, lights, obstructions);
if (col.A == 1)
{
R = (byte)(col.R * 255);
G = (byte)(col.G * 255);
B = (byte)(col.B * 255);
A = (byte)(col.A * 255);
}
else
{
BlendFront(ref R, ref G, ref B, ref A, (byte)(col.R * 255), (byte)(col.G * 255), (byte)(col.B * 255), (byte)(col.A * 255));
}
}
if (A == 255)
{
imageData[y * RenderWidth * 4 + x * 4] = R;
imageData[y * RenderWidth * 4 + x * 4 + 1] = G;
imageData[y * RenderWidth * 4 + x * 4 + 2] = B;
imageData[y * RenderWidth * 4 + x * 4 + 3] = A;
}
else
{
BlendFront(ref imageData[y * RenderWidth * 4 + x * 4], ref imageData[y * RenderWidth * 4 + x * 4 + 1], ref imageData[y * RenderWidth * 4 + x * 4 + 2], ref imageData[y * RenderWidth * 4 + x * 4 + 3], R, G, B, A);
}
ZBuffer[y * RenderWidth + x] = zDepth;
ZIndexBuffer[y * RenderWidth + x] = triangle.ZIndex;
}
else if (imageData[y * RenderWidth * 4 + x * 4 + 3] < 255)
{
byte R = 0;
byte G = 0;
byte B = 0;
byte A = 0;
for (int i = 0; i < triangle.Fill.Count; i++)
{
Colour col = triangle.Fill[i].GetColour(correspPoint, triangle.GetNormalAt(correspPoint), camera, lights, obstructions);
if (col.A == 1)
{
R = (byte)(col.R * 255);
G = (byte)(col.G * 255);
B = (byte)(col.B * 255);
A = (byte)(col.A * 255);
}
else
{
BlendFront(ref R, ref G, ref B, ref A, (byte)(col.R * 255), (byte)(col.G * 255), (byte)(col.B * 255), (byte)(col.A * 255));
}
}
BlendBack(R, G, B, A, ref imageData[y * RenderWidth * 4 + x * 4], ref imageData[y * RenderWidth * 4 + x * 4 + 1], ref imageData[y * RenderWidth * 4 + x * 4 + 2], ref imageData[y * RenderWidth * 4 + x * 4 + 3]);
}
}
});
}
