public virtual void Draw_without_colors(Graphics3D graphics)
{
//foreach(var vertex in Vertices)
//{
// graphics.DrawPoint(vertex, Color.Black);
//}
foreach (var verge in Verges)
{
Vector p1 = Vertices[verge[0]];
Vector p2 = Vertices[verge[1]];
Vector p3 = Vertices[verge[2]];
double[,] matrix = new double[2, 3];
matrix[0, 0] = p2.X - p1.X;
matrix[0, 1] = p2.Y - p1.Y;
matrix[0, 2] = p2.Z - p1.Z;
matrix[1, 0] = p3.X - p1.X;
matrix[1, 1] = p3.Y - p1.Y;
matrix[1, 2] = p3.Z - p1.Z;
double ni = matrix[0, 1] * matrix[1, 2] - matrix[0, 2] * matrix[1, 1];
double nj = matrix[0, 2] * matrix[1, 0] - matrix[0, 0] * matrix[1, 2];
double nk = matrix[0, 0] * matrix[1, 1] - matrix[0, 1] * matrix[1, 0];
double d = -(ni * p1.X + nj * p1.Y + nk * p1.Z);
Vector pp = new Vector(p1.X + ni, p1.Y + nj, p1.Z + nk);
double val1 = ni * pp.X + nj * pp.Y + nk * pp.Z + d;
double val2 = ni * Center.X + nj * Center.Y + nk * Center.Z + d;
if (val1 * val2 > 0)
{
ni = -ni;
nj = -nj;
nk = -nk;
}
if (ni * 1 + nj * 1 + nk * 1 > 0)
{
graphics.DrawPoint(Vertices[verge[0]], Color.Black);
for (int i = 1; i < verge.Length; ++i)
{
graphics.DrawPoint(Vertices[verge[i]], Color.Black);
graphics.DrawLine(Vertices[verge[i - 1]], Vertices[verge[i]]);
}
graphics.DrawLine(Vertices[verge[verge.Length - 1]], Vertices[verge[0]]);
}
}
}
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
if (current_primitive == null)
{
return;
}
e.Graphics.Clear(SystemColors.Control);
e.Graphics.DrawLines(Pens.Black, new Point[]
{
new Point(1, 1),
new Point(1, Height - 1),
new Point(Width - 1, Height - 1),
new Point(Width - 1, 1),
new Point(1, 1)
});
if (current_primitive == null)
{
return;
}
var graphics3D = new Graphics3D(e.Graphics, ViewCamera.ViewProjection, Width, Height);
if (without_colors)
{
current_primitive.Draw_without_colors(graphics3D);
}
else
{
var x = new Vector(0.8, 0, 0);
var y = new Vector(0, 0.8, 0);
var z = new Vector(0, 0, 0.8);
graphics3D.DrawLine(new Vector(0, 0, 0), x, new Pen(Color.Red, 2));
graphics3D.DrawPoint(x, Color.Red);
graphics3D.DrawLine(new Vector(0, 0, 0), y, new Pen(Color.Green, 2));
graphics3D.DrawPoint(y, Color.Green);
graphics3D.DrawLine(new Vector(0, 0, 0), z, new Pen(Color.Blue, 2));
graphics3D.DrawPoint(z, Color.Blue);
current_primitive.Draw(graphics3D);
}
e.Graphics.DrawImage(graphics3D.ColorBuffer, 0, 0);
}
public virtual void Draw(Graphics3D graphics)
{
Random r = new Random(256);
foreach (var verge in Verges)
{
int k = r.Next(0, 256);
int k2 = r.Next(0, 256);
int k3 = r.Next(0, 256);
for (int i = 1; i < verge.Length - 1; ++i)
{
var a = new Vertex(Vertices[verge[0]], new Vector(), Color.FromArgb(k2, k, k3));
var b = new Vertex(Vertices[verge[i]], new Vector(), Color.FromArgb(k2, k, k3));
var c = new Vertex(Vertices[verge[i + 1]], new Vector(), Color.FromArgb(k2, k, k3));
graphics.DrawTriangle(a, b, c);
}
}
}
private void PictureBox1_Paint(object sender, PaintEventArgs e)
{
//e.Graphics.Clear(Color.White);
if (current_primitive == null)
{
return;
}
var graphics3D = new Graphics3D(e.Graphics, camera.ViewProjection, pictureBox1.Width, pictureBox1.Height, camera.Position);
/*var x = new Vector(1, 0, 0);
* var y = new Vector(0, 1, 0);
* var z = new Vector(0, 0, 1);
* graphics3D.DrawLine(new Vector(0, 0, 0), x, new Pen(Color.Red, 2));
* graphics3D.DrawPoint(x, Color.Red);
* graphics3D.DrawLine(new Vector(0, 0, 0), y, new Pen(Color.Green, 2));
* graphics3D.DrawPoint(y, Color.Green);
* graphics3D.DrawLine(new Vector(0, 0, 0), z, new Pen(Color.Blue, 2));
* graphics3D.DrawPoint(z, Color.Blue);*/
if (without_colors)
{
current_primitive.Draw_without_colors(graphics3D);
}
else if (moreThanOneObj)
{
foreach (var obj in objects)
{
obj.Draw(graphics3D);
}
}
else
{
current_primitive.Draw(graphics3D);
}
e.Graphics.DrawImage(graphics3D.ColorBuffer, 0, 0);
}