namespace _3D
{
public partial class Form2 : Form
{
public Form2()
{
InitializeComponent();
b = new Bitmap(this.ClientRectangle.Width, this.ClientRectangle.Height);
bg = Graphics.FromImage(b);
b1Back = Color.LightYellow;
b1Fore = Color.Red;
p = new Pen(b1Fore);
Xo = b.Width / 2;
Ho = b.Height / 2;
initwireframe(ref w, 70, 200);
veWireframe(w, bg);
khoitaowireframe(ref w1, 200, 70);
veWireframe(w1, bg);
}
int PH = 20;
struct point3D
{
public double x, y, z;
}
struct point2D
{
public double x, y;
}
struct wireframe
{
public int ndinh, ncanh;
public point3D[] dinh;
public int[,] canh;
}
Bitmap b;
Graphics bg;
Pen p;
Color b1Back, b1Fore;
wireframe w,w1;
int Xo, Ho;
double a = 0;
double da;
void khoitaowireframe(ref wireframe w, double l, double r)
{
w.ndinh = 1 + PH;
w.ncanh = 2 * PH;
da = 2 * Math.PI / PH;
w.dinh = new point3D[w.ndinh];
w.canh = new int[w.ncanh, 2];
//dinh
w.dinh[0].x = 0; w.dinh[0].y = l; w.dinh[0].z = 0;
for (int i = 1; i <= PH; i++)
{
w.dinh[i].y = l/2;
w.dinh[i].x = r * Math.Cos(a);
w.dinh[i].z = r * Math.Sin(a);
a += da;
//w.dinh[i] = w.dinh[i];
//w.dinh[i].y = l;
}
//canh
//canh xung quanh
for (int i = 1; i <= PH; i++)
{
w.canh[i-1, 0] = 0;
w.canh[i-1, 1] = i;
}
//canh day
for (int i = 1; i < PH; i++)
{
w.canh[i-1 + PH, 0] = i;
w.canh[i-1 + PH, 1] = i + 1;
}
w.canh[2 * PH - 1, 1] = PH ;
w.canh[2 * PH - 1, 0] = 1;
}
point3D xoayDiemOX(point3D p, float a)
{
point3D q;
q.y = p.y * Math.Cos(a) - p.z * Math.Sin(a);
q.z = p.y * Math.Sin(a) + p.z * Math.Cos(a);
q.x = p.x;
return q;
}
point3D xoayDiemOY(point3D p, float a)
{
point3D q;
q.z = p.z * Math.Cos(a) - p.x * Math.Sin(a);
q.x = p.z * Math.Sin(a) + p.x * Math.Cos(a);
q.y = p.y;
return q;
}
point3D xoayDiemOZ(point3D p, float a)
{
point3D q;
q.x = p.x * Math.Cos(a) - p.y * Math.Sin(a);
q.y = p.x * Math.Sin(a) + p.y * Math.Cos(a);
q.z = p.z;
return q;
}
void initwireframe(ref wireframe w, double r, double l)
{
w.ncanh = 3 * PH;
w.ndinh = 2 * PH;
w.canh = new int[w.ncanh, 2];
w.dinh = new point3D[w.ndinh];
//danh sach dinh
double a = 0, da = Math.PI * 2 / PH;
for (int i = 0; i < PH; i++)
{
w.dinh[i].y = l / 2;
w.dinh[i].z = r * Math.Cos(a);
w.dinh[i].x = r * Math.Sin(a);
a += da;
w.dinh[i + PH] = w.dinh[i];
w.dinh[i + PH].y = -l / 2;
}
//danh sach canh xung quanh
for (int i = 0; i < PH; i++)
{
w.canh[i, 0] = i; w.canh[i, 1] = i + PH;
}
//canh day duoi
for (int i = 0; i < PH - 1; i++)
{
w.canh[i + PH, 0] = i;
w.canh[i + PH, 1] = i + 1;
}
w.canh[2 * PH - 1, 0] = 0; w.canh[2 * PH - 1, 1] = PH - 1;
//canh day tren
for (int i = 0; i < PH - 1; i++)
{
w.canh[i + 2 * PH, 0] = i + PH;
w.canh[i + 2 * PH, 1] = i + 1 + PH;
}
w.canh[3 * PH - 1, 0] = PH;
w.canh[3 * PH - 1, 1] = 2 * PH - 1;
}
void xoayWireframeOX(ref wireframe w, float a)
{
for (int i = 0; i < w.ndinh; i++)
w.dinh[i] = xoayDiemOX(w.dinh[i], a);
}
void xoayWireframeOY(ref wireframe w, float a)
{
for (int i = 0; i < w.ndinh; i++)
w.dinh[i] = xoayDiemOY(w.dinh[i], a);
}
void xoayWireframeOZ(ref wireframe w, float a)
{
for (int i = 0; i < w.ndinh; i++)
w.dinh[i] = xoayDiemOZ(w.dinh[i], a);
}
void myLine(point2D p1, point2D p2, Graphics b1g)
{
p1.y = Ho - p1.y; p1.x += Xo;
p2.y = Ho - p2.y; p2.x += Xo;
b1g.DrawLine(p, (float)p1.x, (float)p1.y, (float)p2.x, (float)p2.y);
}
point2D chieuSSoxy(point3D p)
{
point2D q;
q.x = p.x;
q.y = p.y;
return q;
}
void veWireframe(wireframe w, Graphics g)
{
point2D q1, q2;
point3D p1, p2;
for (int i = 0; i < w.ncanh; i++)
{
p1 = w.dinh[w.canh[i, 0]];
p2 = w.dinh[w.canh[i, 1]];
q1 = chieuSSoxy(p1); q2 = chieuSSoxy(p2);
myLine(q1, q2, g);
}
}
private void Form1_Paint(object sender, PaintEventArgs e)
{
Graphics g = e.Graphics;
g.DrawImageUnscaled(b, 0, 0);
}
const float goc = (float)(5 * Math.PI / 180);
private void Form1_KeyDown(object sender, KeyEventArgs e)
{
switch (e.KeyCode)
{
case Keys.X:
//quay ox
xoayWireframeOX(ref w, goc);
xoayWireframeOX(ref w1, goc);
bg.Clear(b1Back);
veWireframe(w, bg);
veWireframe(w1, bg);
this.Invalidate();
break;
case Keys.Y:
//quay oy
xoayWireframeOY(ref w, goc);
xoayWireframeOY(ref w1, goc);
bg.Clear(b1Back);
veWireframe(w, bg);
veWireframe(w1, bg);
this.Invalidate();
break;
case Keys.Z:
//quay ox
xoayWireframeOZ(ref w, goc);
xoayWireframeOZ(ref w1, goc);
bg.Clear(b1Back);
veWireframe(w, bg);
veWireframe(w1, bg);
this.Invalidate();
break;
}
}
private void Form2_Load(object sender, EventArgs e)
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