code project
namespace chuong7
{
public partial class Hinhchop : Form
{
struct wireframe
{
public int numEdges, numVerts;
public point3D[] vert;
public int[,] edge;
}
struct point3D
{
public double x, y, z;
}
struct point2D
{
public double x, y;
}
const float goc = (float)(5 * Math.PI / 180);
double phi = Math.PI * 30 / 180, teta = Math.PI * 30 / 180;
//============data =====================
Bitmap b;
Graphics bg;
Pen p;
Color b1Back, b1Fore;
// vi tri he toa do
int Xo, Ho;
wireframe w;
void initwireframe(ref wireframe w)
{
w.numVerts = 4;
w.numEdges = 6;
w.edge = new int[w.numEdges, 2];
w.vert = new point3D[w.numVerts];
w.vert[0].x = 0; w.vert[0].y = 0; w.vert[0].z = 0;
w.vert[1].x = 80; w.vert[1].y = 0; w.vert[1].z = 40;
w.vert[2].x = 60; w.vert[2].y = 80; w.vert[2].z = 0;
w.vert[3].x = 100; w.vert[3].y = 0; w.vert[3].z = -40;
w.edge[0, 0] = 0; w.edge[0, 1] = 1;
w.edge[1, 0] = 1; w.edge[1, 1] = 2;
w.edge[2, 0] = 2; w.edge[2, 1] = 3;
w.edge[3, 0] = 0; w.edge[3, 1] = 3;
w.edge[4, 0] = 1; w.edge[4, 1] = 3;
w.edge[5, 0] = 2; w.edge[5, 1] = 0;
}
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.numEdges; i++)
{
p1 = w.vert[w.edge[i, 0]];
p2 = w.vert[w.edge[i, 1]];
q1 = chieuSSoxy(p1); q2 = chieuSSoxy(p2);
myLine(q1, q2, g);
}
}
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 xoayWireframeOX(ref wireframe w, float a)
{
for (int i = 0; i < w.numVerts; i++)
w.vert[i] = xoayDiemOX(w.vert[i], a);
}
void xoayWireframeOY(ref wireframe w, float a)
{
for (int i = 0; i < w.numVerts; i++)
w.vert[i] = xoayDiemOY(w.vert[i], a);
}
void xoayWireframeOZ(ref wireframe w, float a)
{
for (int i = 0; i < w.numVerts; i++)
w.vert[i] = xoayDiemOZ(w.vert[i], a);
}
public Hinhchop()
{
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);
vePC_tongQuat(w, 200,phi,teta);
}
//----- Chieu phoi canh tong quat: mat o vector V co toa do
//------R ,phi,teta nhu giao trinh Hue trang 54
void DoiHeToaDo(ref point3D p1,float R,double phi, double teta)
{
double x = p1.x, y= p1.y, z = p1.z;
p1.x= Math.Round(-x*Math.Sin(teta)+y*Math.Cos(teta));
p1.y = Math.Round(-x * Math.Cos(teta) * Math.Sin(phi) - y * Math.Sin(teta) * Math.Sin(phi) + z * Math.Cos(phi));
p1.z = Math.Round(-x * Math.Cos(teta) * Math.Cos(phi) - y * Math.Sin(teta) * Math.Cos(phi) - z * Math.Sin(phi) + R);
}
void vePC_tongQuat(wireframe w, int E, double phi, double teta)
{
double x1,y1,x2,y2;
double t;
point3D p;
for(int i=0; i<w.numEdges; i++)
{
p=w.vert[ w.edge[i,0] ];
DoiHeToaDo(ref p,E, phi, teta);
t=(double)E/p.z;
x1=Math.Round(p.x*t);
y1=Math.Round(p.y*t);
point2D p1; p1.x = x1; p1.y = y1;
p=w.vert[ w.edge[i,1] ];
DoiHeToaDo(ref p,E, phi, teta);
t=(double)E/p.z;
x2 = Math.Round(p.x * t);
y2 = Math.Round(p.y * t);
point2D p2; p2.x = x2; p2.y = y2;
myLine(p1,p2,bg);
}
return;
}
private void Hinhchop_Paint(object sender, PaintEventArgs e)
{
Graphics g = e.Graphics;
g.DrawImageUnscaled(b, 0, 0);
}
private void Hinhchop_KeyDown(object sender, KeyEventArgs e)
{
switch (e.KeyCode)
{
case Keys.X:
//quay ox
xoayWireframeOX(ref w, goc);
bg.Clear(b1Back);
vePC_tongQuat(w, 200, phi, teta);
this.Invalidate();
break;
case Keys.Y:
//quay oy
xoayWireframeOY(ref w, goc);
bg.Clear(b1Back);
vePC_tongQuat(w, 200, phi, teta);
this.Invalidate();
break;
case Keys.Z:
//quay ox
xoayWireframeOZ(ref w, goc);
bg.Clear(b1Back);
vePC_tongQuat(w, 200, phi, teta);
this.Invalidate();
break;
}
}
private void Hinhchop_Load(object sender, EventArgs e)
{
}
}
}
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