一：Graphics類的方法
1． 繪製方法
繪製橢圓
private void Form1_Paint(object sender,
System.Windows.Forms.PaintEventArgs e)
{
Graphics g = e.Graphics ;
// Create pens
Pen redPen = new Pen(Color.Red, 6 );
Pen bluePen = new Pen(Color.Blue, 4 );
Pen greenPen = new Pen(Color.Green, 2);
// Create a rectangle
Rectangle rect =
new Rectangle(80, 80, 50, 50);
// Draw ellipses
g.DrawEllipse(greenPen,
g.DrawEllipse(redPen, rect );
g.DrawEllipse(bluePen, 60, 60, 90, 90);
g.DrawEllipse(greenPen,
// Dispose
redPen.Dispose();
greenPen.Dispose();
bluePen.Dispose();
}
2. 繪製文本
private void Form1_Paint(object sender,
System.Windows.Forms.PaintEventArgs e)
{
// Create brushes
SolidBrush blueBrush = new SolidBrush(Color.Blue);
SolidBrush redBrush = new SolidBrush(Color.Red);
SolidBrush greenBrush = new SolidBrush(Color.Green);
// Create a rectangle
Rectangle rect = new Rectangle(20, 20, 200, 100);
// The text to be drawn
String drawString = "Hello GDI+ World!";
// Create a Font
Font drawFont = new Font("Verdana", 14);
float x =
float y =
// String format
StringFormat drawFormat = new StringFormat();
// Set string format flag to direction vertical
// which draws text vertical
drawFormat.FormatFlags =
StringFormatFlags.DirectionVertical;
// Draw string
e.Graphics.DrawString("Drawing text",
new Font("Tahoma", 14), greenBrush, rect);
e.Graphics.DrawString(drawString,
new Font("Arial", 12), redBrush, 120, 140);
e.Graphics.DrawString(drawString, drawFont,
blueBrush, x, y, drawFormat);
// Dispose
blueBrush.Dispose();
redBrush.Dispose();
greenBrush.Dispose();
drawFont.Dispose();
}
3. 填充方法
填充矩形
private void Form1_Paint(object sender,
System.Windows.Forms.PaintEventArgs e)
{
// Create brushes
SolidBrush blueBrush = new SolidBrush(Color.Blue);
SolidBrush redBrush = new SolidBrush(Color.Red);
// Create a rectangle
Rectangle rect = new Rectangle(10, 20, 100, 50);
// Fill rectangle
e.Graphics.FillRectangle(new HatchBrush
(HatchStyle.BackwardDiagonal,
Color.Yellow, Color.Black),
rect);
e.Graphics.FillRectangle(blueBrush,
new Rectangle(150, 20, 50, 100));
// e.Graphics.FillRectangles(redBrush, rectArray);
// Dispose
blueBrush.Dispose();
redBrush.Dispose();
}
4. 繪製圖像
private void Form1_Paint(object sender,
System.Windows.Forms.PaintEventArgs e)
{
// Create an Image from a file
Image newImage =
Image.FromFile("dnWatcher.gif");
try
{
// Draw image
e.Graphics.DrawImage(newImage,
this.ClientRectangle);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message.ToString());
}
}
5. GDI+ Painter
首先在類級上定義一些私有變量。
下一步是初始化對象。在form-load 事件處理程序中，創建一個位圖並從此位圖創建一個Graphics對象，以代表整個窗體。通過調用Graphics.Clear 方法將此對象的背景色設置爲窗體的背景色。在加載窗體時在創建一個Pen對象和一個Brush對象。
private void Form1_Load(object sender,
System.EventArgs e)
{
// Get the full size of the form
fullSize = SystemInformation
.PrimaryMonitorMaximizedWindowSize;
// Create a bitmap using full size
bitmap = new Bitmap(fullSize.Width,
fullSize.Height);
// Create a Graphics object from Bitmap
curGraphics = Graphics.FromImage(bitmap);
// Set background color as form's color
curGraphics.Clear(this.BackColor);
// Create a new pen and brush as
// default pen and brush
curPen = new Pen(Color.Black);
curBrush = new SolidBrush(Color.Black);
}
6. 旋轉體
public MainClass()
{
Xmat=new XRotate(changex);
Ymat=new YRotate(changey);
Zmat=new ZRotate(changez);
Size=new Size(400,260);
Text = "Hellllo 3D!";
FormBorderStyle=FormBorderStyle.FixedToolWindow;
MaximizeBox=false;
Button b1=new Button();
b1.Text="Add X axis Speed";
b1.Size=new Size(115,25);
b1.Click+=new EventHandler(moreX);
Controls.Add(b1);
Button b2=new Button();
b2.Text="Add Y axis Speed";
b2.Size=new Size(115,25);
b2.Location=new Point(0,25);
b2.Click+=new EventHandler(moreY);
Controls.Add(b2);
Button b3=new Button();
b3.Text="Add Z axis Speed";
b3.Size=new Size(115,25);
b3.Location=new Point(0,50);
b3.Click+=new EventHandler(moreZ);
Controls.Add(b3);
Button b4=new Button();
b4.Text="Less X axis Speed";
b4.Size=new Size(115,25);
b4.Location=new Point(0,75);
b4.Click+=new EventHandler(lessX);
Controls.Add(b4);
Button b5=new Button();
b5.Text="Less Y axis Speed";
b5.Size=new Size(115,25);
b5.Location=new Point(0,100);
b5.Click+=new EventHandler(lessY);
Controls.Add(b5);
Button b6=new Button();
b6.Text="Less Z axis Speed";
b6.Size=new Size(115,25);
b6.Location=new Point(0,125);
b6.Click+=new EventHandler(lessZ);
Controls.Add(b6);
b7.Text="Stop !!!";
b7.Size=new Size(115,25);
b7.Location=new Point(0,150);
b7.Click+=new EventHandler(Stop);
Controls.Add(b7);
RadioButton b8=new RadioButton();
b8.Text="CUBE";
b8.Size=new Size(195,25);
b8.Location=new Point(250,210);
b8.BackColor=Color.White;
b8.Checked=false;
b8.CheckedChanged+=new EventHandler(shapeCube);
Controls.Add(b8);
RadioButton b9=new RadioButton();
b9.Text="Sphere";
b9.Checked=false;
b9.Size=new Size(75,25);
b9.BackColor=Color.White;
b9.Location=new Point(115,210);
b9.CheckedChanged+=new EventHandler(shapeSphere);
Controls.Add(b9);
RadioButton b10=new RadioButton();
b10.Text="Axis";
b10.Checked=true;
b10.Size=new Size(115,25);
b10.BackColor=Color.White;
b10.Location=new Point(190,210);
b10.CheckedChanged+=new EventHandler(shapeAxis);
Controls.Add(b10);
t1=new Label();
t2=new Label();
t3=new Label();
t1.Size=new Size(115,20);
t2.Size=new Size(115,20);
t3.Size=new Size(115,20);
t1.Location=new Point(0,175);
t2.Location=new Point(0,195);
t3.Location=new Point(0,215);
t1.BackColor=Color.White;
t2.BackColor=Color.White;
t3.BackColor=Color.White;
Controls.Add(t1);
Controls.Add(t2);
Controls.Add(t3);
SetStyle(ControlStyles.AllPaintingInWmPaint, true);
SetStyle(ControlStyles.DoubleBuffer, true);
Vector z=new Vector(250,105,1000);
Vector[] points1=new Vector[4];
Vector[] points2=new Vector[4];
Vector[] points3=new Vector[4];
Vector[] points4=new Vector[4];
Polygon poly1,poly2,poly3,poly4;
// building the axis shape;
points1[0]=new Vector(-100,0,0);
points1[1]=new Vector(100,0,0);
points2[0]=new Vector(0,-100,0);
points2[1]=new Vector(0,100,0);
points3[0]=new Vector(0,0,-100);
points3[1]=new Vector(0,0,100);
poly1=new Polygon(1000,z,points1[0],points1[1]);
poly2=new Polygon(1000,z,points2[0],points2[1]);
poly3=new Polygon(1000,z,points3[0],points3[1]);
Axis=new Shape3D(poly1,poly2,poly3);
// building the Cube shape;
points1[0]=new Vector(0,0,50);
points1[1]=new Vector(0,50,50);
points1[2]=new Vector(50,50,50);
points1[3]=new Vector(50,0,50);
poly1=new Polygon(1000,z,points1);
poly1=poly1.Transpose(new Vector(-5,-5,-30));
points2[0]=new Vector(0,0,50);
points2[1]=new Vector(0,0,100);
points2[2]=new Vector(0,50,100);
points2[3]=new Vector(0,50,50);
poly2=new Polygon(1000,z,points2);
poly2=poly2.Transpose(new Vector(-5,-5,-30));
points3[0]=new Vector(0,0,100);
points3[1]=new Vector(0,50,100);
points3[2]=new Vector(50,50,100);
points3[3]=new Vector(50,0,100);
poly3=new Polygon(1000,z,points3);
poly3=poly3.Transpose(new Vector(-5,-5,-30));
points4[0]=new Vector(50,0,50);
points4[1]=new Vector(50,0,100);
points4[2]=new Vector(50,50,100);
points4[3]=new Vector(50,50,50);
poly4=new Polygon(1000,z,points4);
poly4=poly4.Transpose(new Vector(-5,-5,-30));
Cube=new Shape3D(poly1,poly2,poly3,poly4);
// building the Cube shape;
Polygon[] p = new Polygon[130];
poly1=poly1.Transpose(new Vector(-30,-30,-100));
for (int count=0;count<p.Length;count++)
{
p[count]=poly1.Rotate(new ZRotate(System.Math.PI/20*count)).Rotate(new XRotate(System.Math.PI/60*count)).Rotate(new YRotate(System.Math.PI/180*count));
}
Circle=new Shape3D(p);
this.Paint+=new System.Windows.Forms.PaintEventHandler(MyPaint);
this.Click+=new EventHandler(MyClick);
currentShape=Axis;
tm=new Timer();
tm.Interval=10;
tm.Tick+=new EventHandler(tmEvent);
tm.Start();
}
private void shapeSphere(object sender, System.EventArgs e)
{
currentShape=Circle;
Invalidate(new Rectangle(135,0,235,210));
}
private void shapeCube(object sender, System.EventArgs e)
{
currentShape=Cube;
Invalidate(new Rectangle(135,0,235,210));
}
private void shapeAxis(object sender, System.EventArgs e)
{
currentShape=Axis;
Invalidate(new Rectangle(135,0,235,210));
}
private void moreX(object sender, System.EventArgs e)
{
changex+=
Xmat=new XRotate(changex);
}
private void moreY(object sender, System.EventArgs e)
{
changey+=
Ymat=new YRotate(changey);
}
private void moreZ(object sender, System.EventArgs e)
{
changez+=
Zmat=new ZRotate(changez);
}
private void lessX(object sender, System.EventArgs e)
{
changex-=
Xmat=new XRotate(changex);
}
private void lessY(object sender, System.EventArgs e)
{
changey-=
Ymat=new YRotate(changey);
}
private void lessZ(object sender, System.EventArgs e)
{
changez-=
Zmat=new ZRotate(changez);
}
private void Stop(object sender, System.EventArgs e)
{
stop=!stop;
if (stop)
{
tm.Stop();
b7.Text="Continue";
}
else
{
tm.Start();
b7.Text="Stop!";
}
}
private void tmEvent(object sender, System.EventArgs e)
{
Invalidate(new Rectangle(135,0,235,210));
}
public void MyClick(object sender, EventArgs e)
{
changey=-changey;
changex=-changex;
changez=-changez;
Xmat=new XRotate(changex);
Ymat=new YRotate(changey);
Zmat=new ZRotate(changez);
}
public void MyPaint(object sender, PaintEventArgs e)
{
t1.Text="X speed: "+changex.ToString();
t2.Text="Y speed: "+changey.ToString();
t3.Text="Z speed: "+changez.ToString();
currentShape=currentShape.Rotate(Zmat).Rotate(Xmat).Rotate(Ymat);
currentShape.Draw(e.Graphics);
}
private void InitializeComponent()
{
//
// MainClass
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(416, 309);
this.Name = "MainClass";
}
