/// <summary>
/// Параллельный перенос 3D объекта.
/// </summary>
/// <param name="item">3D объект.</param>
/// <param name="X">Смещение по оси X.</param>
/// <param name="Y">Смещение по оси Y.</param>
/// <param name="Z">Смещение по оси Z.</param>
static public void Translate(Abstract3DInstance item, double X, double Y, double Z)
{
foreach (Point3D point in item.Points)
{
point.X += X;
point.Y += Y;
point.Z += Z;
}
}
/// <summary>
/// Масштабирования 3D объекта.
/// </summary>
/// <param name="item">3D объект.</param>
/// <param name="scaleFactor">масштабный множитель</param>
/// <param name="Xc">X координата точки масштабирования.</param>
/// <param name="Yc">Y координата точки масштабирования.</param>
/// <param name="Zc">Z координата точки масштабирования.</param>
static public void Scale(Abstract3DInstance item, double scaleFactor, double Xc, double Yc, double Zc)
{
foreach (Point3D point in item.Points)
{
point.X = scaleFactor * (point.X - Xc) + Xc;
point.Y = scaleFactor * (point.Y - Yc) + Yc;
point.Z = scaleFactor * (point.Z - Zc) + Zc;
}
}
void FirstTransformation(Abstract3DInstance instance, double Xc, double Yc)
{
if (instance == null)
{
return;
}
TransformEngine.Scale(instance, 140, 0, 0, 0);
TransformEngine.Translate(instance, Xc, Yc, 0);
_scaleFactor = 1;
}
/// <summary>
/// Поворот в плоскости YZ.
/// </summary>
/// <param name="item">3D объект.</param>
/// <param name="angle">Угол в радианах.</param>
/// <param name="Yc">Y координата центра вращения.</param>
/// <param name="Zc">Z координата центра вращения.</param>
static public void RotateYZ(Abstract3DInstance item, double angle, double Yc, double Zc)
{
double si = Math.Sin(angle);
double co = Math.Cos(angle);
foreach (Point3D point in item.Points)
{
double y = co * (point.Y - Yc) - si * (point.Z - Zc) + Yc;
double z = si * (point.Y - Yc) + co * (point.Z - Zc) + Zc;
point.Y = y;
point.Z = z;
}
}
/// <summary>
/// Поворот в плоскости XZ.
/// </summary>
/// <param name="item">3D объект.</param>
/// <param name="angle">Угол в радианах.</param>
/// <param name="Xc">X координата центра вращения.</param>
/// <param name="Zc">Z координата центра вращения.</param>
static public void RotateXZ(Abstract3DInstance item, double angle, double Xc, double Zc)
{
double si = Math.Sin(angle);
double co = Math.Cos(angle);
foreach (Point3D point in item.Points)
{
double x = co * (point.X - Xc) - si * (point.Z - Zc) + Xc;
double z = si * (point.X - Xc) + co * (point.Z - Zc) + Zc;
point.X = x;
point.Z = z;
}
}
private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
int index = comboBox1.SelectedIndex;
if (index < 0)
{
return;
}
_instance3D = Factory3Dinstance.GetInstance(index);
FirstTransformation(_instance3D, pictureBox1.Width / 2, pictureBox1.Height / 2);
trackBar1.Value = (trackBar1.Minimum + trackBar1.Maximum) / 2;
Render();
}
/// <summary>
/// Получение 3D объекта по id.
/// </summary>
/// <param name="id"></param>
/// <returns>Экземпляр класса Abstract3DInstance.</returns>
static public Abstract3DInstance GetInstance(int id)
{
Abstract3DInstance instance = null;
switch (id)
{
case 0:
instance = new Cube();
break;
case 1:
instance = new Tetrahedron();
break;
case 2:
instance = new Octahedron();
break;
}
return(instance);
}
void Render3DInstance(Abstract3DInstance instance, Graphics g, Point3D centerPerspective, int mode)
{
if (instance == null)
{
return;
}
Pen pen = new Pen(Color.Black, 3f);
Pen dashPen = new Pen(Color.Black, 3f)
{
DashStyle = System.Drawing.Drawing2D.DashStyle.Dash
};
IEnumerable <Edge> edges = checkBox1.Checked ?
instance.Render(new PerspectiveTransform(), centerPerspective) :
instance.Render();
foreach (Edge e in edges)
{
switch (mode)
{
case 0:
g.DrawLine(pen, e.Point1.ToPointF(), e.Point2.ToPointF());
break;
case 1:
if (e.Visible)
{
g.DrawLine(pen, e.Point1.ToPointF(), e.Point2.ToPointF());
}
break;
case 2:
g.DrawLine(e.Visible ? pen : dashPen, e.Point1.ToPointF(), e.Point2.ToPointF());
break;
}
}
}
