private TDPoint GetCurrentPoint(TDPointD start, long step)
{
if (Camera.Direction == Direction.Front)
{
return new TDPoint()
{
X = (long)Math.Round(start.X - step * Camera.NormalSingleVector.X), Y = (long)Math.Round(start.Y - step * Camera.NormalSingleVector.Y), Z = (long)Math.Round(start.Z - step * Camera.NormalSingleVector.Z)
}
}
;
else
{
return new TDPoint()
{
X = (long)Math.Round(start.X + step * Camera.NormalSingleVector.X), Y = (long)Math.Round(start.Y + step * Camera.NormalSingleVector.Y), Z = (long)Math.Round(start.Z + step * Camera.NormalSingleVector.Z)
}
};
}
private Color GetOrthogonalProjectionPixelColor(long x, long y)
{
Color result = Colors.Transparent;
TDPointD start = Camera.GetOffsetStartCoordinates(x, y); // Координаты текущей точки, при step = 0, это координаты точки на приёмной матрице.
TDPoint current;
for (long step = 1; step <= Camera.MaxDistance; step++)
{
current = GetCurrentPoint(start, step);
// Если текущая точка луча ударилась, то определяем цвет от ударившуюся поверность и её окружение по пути:
if (IsObjectInCurrentPoint(current))
{
result = GetColor(current);
break;
}
}
return(result);
}
public TDPointD GetOffsetStartCoordinates(long x, long y)
{
TDPointD result = new TDPointD();
TDPointD top = new TDPointD(), bottom = new TDPointD();
double tx = x / (double)(Width - 1);
double ty = y / (double)(Height - 1);
top.X = TopLeft.X * (1 - tx) + TopRight.X * tx;
top.Y = TopLeft.Y * (1 - tx) + TopRight.Y * tx;
top.Z = TopLeft.Z * (1 - tx) + TopRight.Z * tx;
bottom.X = BottomLeft.X * (1 - tx) + BottomRight.X * tx;
bottom.Y = BottomLeft.Y * (1 - tx) + BottomRight.Y * tx;
bottom.Z = BottomLeft.Z * (1 - tx) + BottomRight.Z * tx;
result.X = top.X * (1 - ty) + bottom.X * ty;
result.Y = top.Y * (1 - ty) + bottom.Y * ty;
result.Z = top.Z * (1 - ty) + bottom.Z * ty;
return(result);
}