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Graphics

Mody Farouk
Mody Farouk

The document describes an algorithm to draw a line between two points using a direct line algorithm. It involves dragging and dropping points onto a form, clicking a button to draw the line, and using the line equation y=mx+b to calculate the y-coordinate for each x-coordinate between the start and end points, coloring those pixel locations red on a bitmap to display the line in a picture box.

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鏃荷 惘 悋 悋慍 悋 悋 悋 悋 悋 悋惠 惆 悋 惘 TextBoxes 悋 惘 悋 悋 惘慍 惠 悋 悋 悋 悋 悋 悋 慍悋 TextBoxes 悋 攵 悋 PictureBox 攵 悋 攵 悋 悋 惘慍 悋 惆 悋 悋 悋 悋 悋 Button 攵 悋 悋 惺 悋Form 悋 Design 惆 悋 悋 愀 攵 惆 悋 悋PictureBox 惘慍 悋 攵 攵 悋 Button悋 悋 悋 攵 悋Button 攵 惆悋 悋 惆悋 攵 悋 Button惆 攵 悋 惆 惆 攵 悋悋 悋 攵 悋 悋 惠攵 悋 悋 悋 慍悋 悋 悋 TextBoxes 惠悋 惆 悋 1. 攵 悋 惘慍 悋惆 2. 惘悸 惘慍 惆 攵 3. 悋 悋PictureBox 4. 悋 惘悸 惆 攵 悋
盒潮 悋 攵 惆悋 悋 惆 惆Button 悋 攵 攵 悋 惘慍 悋 攵 悋 Pixels 悋 攵 惘悸 悋 悋 攵 //Create New BitMap Image To Put Pixels In And Set Its Width And Height Bitmap bmp = new Bitmap(pictureBox1.Width, pictureBox1.Height); 悋 悋 惘悸 攵 悋 悋 悋 悋PictureBox 慍 愀 惷 悋 惘悸 愀 悋 Pixels惘悸 悋 惘慍 攵 悋悋 攵 //Fill BMP Image Pixels With Points On The Line bmp.SetPixel(x, y, Color.Red); PictureBox 悋 惘悸 悋 惘慍 攵 悋 //Show BMP Image In The PictureBox Graphics g = pictureBox1.CreateGraphics(); g.DrawImage(bmp, new Point(0, 0)); *** 惆 Direct Line Algorithm 惘 惺悋 悋 惆 悋
Drag & Drop 攵 惆Draw Line 惡 悋Button 悋 攵 悋攵 悋 悋 悋 惆 private void btnDraw_Click(object sender, EventArgs e) { //Create New BitMap Image To Put Pixels In And Set Its Width And Height Bitmap bmp = new Bitmap(pictureBox1.Width, pictureBox1.Height); //Start Algorithm // The Two Points Vertices int x1 = int.Parse(txtX1.Text), x2 = int.Parse(txtX2.Text), y1 = int.Parse(txtY1.Text), y2 = int.Parse(txtY2.Text); //m >> Slope double m = (x2 - x1) / (y2 - y1); //b >> Intersection With Y double b = y1 - (m * x1); //Find All Points Between The Two Points for (int x = x1; x <= x2; x++) { //From Line Equation >> (y = m*x + b) int y = (int)(m * x + b); //Fill BMP Image Pixels With Points On The Line bmp.SetPixel(x, y, Color.Red); } //End Algorithm //Show BMP Image In The PictureBox Graphics g = pictureBox1.CreateGraphics(); g.DrawImage(bmp, new Point(0, 0)); } 惘惡 悋 悋

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  • 1. 鏃荷 惘 悋 悋慍 悋 悋 悋 悋 悋 悋惠 惆 悋 惘 TextBoxes 悋 惘 悋 悋 惘慍 惠 悋 悋 悋 悋 悋 悋 慍悋 TextBoxes 悋 攵 悋 PictureBox 攵 悋 攵 悋 悋 惘慍 悋 惆 悋 悋 悋 悋 悋 Button 攵 悋 悋 惺 悋Form 悋 Design 惆 悋 悋 愀 攵 惆 悋 悋PictureBox 惘慍 悋 攵 攵 悋 Button悋 悋 悋 攵 悋Button 攵 惆悋 悋 惆悋 攵 悋 Button惆 攵 悋 惆 惆 攵 悋悋 悋 攵 悋 悋 惠攵 悋 悋 悋 慍悋 悋 悋 TextBoxes 惠悋 惆 悋 1. 攵 悋 惘慍 悋惆 2. 惘悸 惘慍 惆 攵 3. 悋 悋PictureBox 4. 悋 惘悸 惆 攵 悋
  • 2. 盒潮 悋 攵 惆悋 悋 惆 惆Button 悋 攵 攵 悋 惘慍 悋 攵 悋 Pixels 悋 攵 惘悸 悋 悋 攵 //Create New BitMap Image To Put Pixels In And Set Its Width And Height Bitmap bmp = new Bitmap(pictureBox1.Width, pictureBox1.Height); 悋 悋 惘悸 攵 悋 悋 悋 悋PictureBox 慍 愀 惷 悋 惘悸 愀 悋 Pixels惘悸 悋 惘慍 攵 悋悋 攵 //Fill BMP Image Pixels With Points On The Line bmp.SetPixel(x, y, Color.Red); PictureBox 悋 惘悸 悋 惘慍 攵 悋 //Show BMP Image In The PictureBox Graphics g = pictureBox1.CreateGraphics(); g.DrawImage(bmp, new Point(0, 0)); *** 惆 Direct Line Algorithm 惘 惺悋 悋 惆 悋
  • 3. Drag & Drop 攵 惆Draw Line 惡 悋Button 悋 攵 悋攵 悋 悋 悋 惆 private void btnDraw_Click(object sender, EventArgs e) { //Create New BitMap Image To Put Pixels In And Set Its Width And Height Bitmap bmp = new Bitmap(pictureBox1.Width, pictureBox1.Height); //Start Algorithm // The Two Points Vertices int x1 = int.Parse(txtX1.Text), x2 = int.Parse(txtX2.Text), y1 = int.Parse(txtY1.Text), y2 = int.Parse(txtY2.Text); //m >> Slope double m = (x2 - x1) / (y2 - y1); //b >> Intersection With Y double b = y1 - (m * x1); //Find All Points Between The Two Points for (int x = x1; x <= x2; x++) { //From Line Equation >> (y = m*x + b) int y = (int)(m * x + b); //Fill BMP Image Pixels With Points On The Line bmp.SetPixel(x, y, Color.Red); } //End Algorithm //Show BMP Image In The PictureBox Graphics g = pictureBox1.CreateGraphics(); g.DrawImage(bmp, new Point(0, 0)); } 惘惡 悋 悋