public Brush PerceivedColor(LightSource light, _Point CamPosition)
{
_Point LightVector = VectMath.Subtract(this.Position, light.Position);
_Point PercVector = this.Position;
_Point Rvector = VectMath.RotateByAngle(VectMath.Negate(LightVector), Normal, 180);
double whitefactor = Math.Abs(.5 * Math.Sin(VectMath.AngleBetween(Normal, LightVector)) + .5);
double colorfactor = Math.Abs(Math.Cos(VectMath.AngleBetween(Normal, LightVector)));
double Total = Math.Pow(Math.Sin(VectMath.AngleBetween(PercVector, Rvector)), 2);
SolidBrush brush = new SolidBrush(Color.FromArgb(Convert.ToInt32(255 * Total * colorfactor * whitefactor), Convert.ToInt32(255 * Total * whitefactor), Convert.ToInt32(255 * Total * whitefactor)));
return(brush);
}
public void DrawPlane(Plane plane)
{
if (VectMath.AngleBetween(VectMath.Subtract(plane.Position, new _Point(0, 0, 0)), plane.Normal) > Math.PI / 2)
{
PointF[] pf = new PointF[plane.Points.Count];
for (int i = 0; i < pf.Length; i++)
{
Point p = convert2D(plane.Points[i]);
pf[i] = new PointF(p.X, p.Y);
}
graphics.FillPolygon(plane.PerceivedColor(Sun, new _Point(0, 0, 0)), pf);
pictureBox1.Image = bm;
// Globals.PlanePointsToClear.Add(pf);
}
// MessageBox.Show(VectMath.AngleBetween(VectMath.Subtract(plane.Position, new _Point(0, 0, 0)), plane.Normal).ToString());
}
public Point convert2D(_Point p)
{
if (Camera1.NormalAxis != Axes.Z)
{
//IO.Point(p);
p = VectMath.RotateByAngle(p, VectMath.Cross(Axes.Z, Camera1.NormalAxis), 180 * (VectMath.AngleBetween(new _Point(0, 0, 1), Camera1.NormalAxis)) / Math.PI);
//IO.Point(p);
}
//if( Camera1.VerticalAxis != Axes.Y)
// {
// p = VectMath.RotateByAngle(p, Camera1.NormalAxis, 180*(VectMath.AngleBetween(new _Point(0, 1, 0), Camera1.VerticalAxis))/Math.PI);
// }
if (p.z <= 0)
{
return(new Point(0, 0));
}
int Xcoord = Convert.ToInt32((p.x * Globals.BMSize.Width / 2) / (p.z * Math.Tan(45))) + Globals.BMSize.Width / 2;
int Ycoord = Convert.ToInt32((-p.y * Globals.BMSize.Height / 2) / (p.z * Math.Tan(45))) + Globals.BMSize.Height / 2;
p.PF = new PointF(Xcoord, Ycoord);
return(new Point(Xcoord, Ycoord));
}