public static IEnumerable <Pixel> GetPixels(int x1, int y1, float z1, int x2, int y2, float z2, int width, int height, Bgr24Bitmap bitmap, ZBuffer zBuf, Color color)
{
List <Pixel> list = new List <Pixel>();
int deltaX = Math.Abs(x2 - x1);
int deltaY = Math.Abs(y2 - y1);
float deltaZ = Math.Abs(z2 - z1);
int signX = x1 < x2 ? 1 : -1;
int signY = y1 < y2 ? 1 : -1;
float signZ = z1 < z2 ? 1 : -1;
float curZ = z1;
float z3 = deltaZ / deltaY;
int error = deltaX - deltaY;
list.Add(new Pixel(x2, y2, z2));
if (x2 > 0 && x2 < zBuf.Width && y2 > 0 && y2 < zBuf.Height)
{
if (z2 <= zBuf[x2, y2])
{
//if (z2 > 0 && z2 < 1)
//{
// zBuf[x2, y2] = z2;
// bitmap[x2, y2] = Color.FromRgb(33, 105, 72); //new Vector4(0, 0, 255, 255);
//}
zBuf[x2, y2] = z2;
bitmap[x2, y2] = color; //Color.FromRgb(0, 0, 255); //new Vector4(0, 0, 255, 255);
}
}
while (x1 != x2 || y1 != y2)
{
list.Add(new Pixel(x1, y1, curZ));
if (x1 > 0 && x1 < zBuf.Width && y1 > 0 && y1 < zBuf.Height)
{
if (curZ <= zBuf[(int)x1, (int)y1])
{
//if (curZ > 0 && curZ < 1)
//{
// zBuf[(int)x1, (int)y1] = curZ; //!!!! curZ????? point2.Z
// bitmap[(int)x1, (int)y1] = Color.FromRgb(0, 0, 255);
//}
zBuf[(int)x1, (int)y1] = curZ; //!!!! curZ????? point2.Z
bitmap[(int)x1, (int)y1] = color; //Color.FromRgb(0, 0, 255);
}
}
int error2 = error * 2;
if (error2 > -deltaY)
{
error -= deltaY;
x1 += signX;
}
if (error2 < deltaX)
{
error += deltaX;
y1 += signY;
curZ += signZ * z3;
}
}
return(list);
}
public static IEnumerable <Pixel> DrawPixelForRasterization(List <Pixel> sidesList, Bgr24Bitmap bitmap, ZBuffer zBuf, Color color)
{
List <Pixel> list = new List <Pixel>();
int minY, maxY;
Pixel xStartPixel, xEndPixel;
FindMinAndMaxY(sidesList, out minY, out maxY);
for (int y = minY + 1; y < maxY; y++)
{
FindStartAndEndXByY(sidesList, y, out xStartPixel, out xEndPixel);
int signZ = xStartPixel.Z < xEndPixel.Z ? 1 : -1;
float deltaZ = Math.Abs((xEndPixel.Z - xStartPixel.Z) / (float)((xEndPixel.X) - (xStartPixel.X)));
float curZ = xStartPixel.Z;
for (int x = xStartPixel.X + 1; x < xEndPixel.X; x++)
{
curZ += signZ * deltaZ;
if (x > 0 && x < zBuf.Width && y > 0 && y < zBuf.Height)
{
if (curZ <= zBuf[x, y])
{
zBuf[x, y] = curZ;
list.Add(new Pixel(x, y, (int)curZ));
bitmap[x, y] = color; //Color.FromRgb(33, 105, 72); //new Vector4(255, 0, 0, 255);
}
}
}
}
return(list);
}