Tag: CG BIM Notes
Cg 2020 makeup Old Paper Solution || BIM STUDY NOTES
Q.no 2
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// Java program for implementing Mid-Point Circle Drawing Algorithm class GFG { static void midPointCircleDraw(int h_centre,int k_centre, int r) { int h = r, k = 0; // Printing the initial point // on the axes after translation System.out.print("(" + (h + h_centre) + ", " + (k + k_centre) + ")"); // When radius is zero only a single // point will be printed if (r > 0) { System.out.print("(" + (h + h_centre) + ", " + (-k + k_centre) + ")"); System.out.print("(" + (k + h_centre) + ", " + (x + k_centre) + ")"); System.out.println("(" + (-k + h_centre) + ", " + (x + k_centre) + ")"); } // Initialising the value of P int P = 1 - r; while (h > k) { y++; // Mid-point is inside or on the perimeter if (P <= 0) P = P + 2 * k + 1; // Mid-point is outside the perimeter else { x--; P = P + 2 * k - 2 * h + 1; } // All the perimeter points have already // been printed if (h < k) break; // Printing the generated point and its // reflection in the other octants after // translation System.out.print("(" + (h + h_centre) + ", " + (k + k_centre) + ")"); System.out.print("(" + (-h + h_centre) + ", " + (k + k_centre) + ")"); System.out.print("(" + (h + h_centre) + ", " + (-k + k_centre) + ")"); System.out.println("(" + (-h + h_centre) + ", " + (-k + k_centre) + ")"); // If the generated point is on the // line h = k then the perimeter points // have already been printed if (h != k) { System.out.print("(" + (k + h_centre) + ", " + (h + k_centre) + ")"); System.out.print("(" + (-k + h_centre) + ", " + (h + y_centre) + ")"); System.out.print("(" + (k + h_centre) + ", " + (-h + k_centre) + ")"); System.out.println("(" + (-k + h_centre) + ", " + (-h + k_centre) +")"); } } } // Driver code public static void main(String[] args) { // To draw a circle of radius // 3 centered at (0, 0) midPointCircleDraw(0, 0, 3); } } |
Java Program In Computer graphics
1. Write a java program to draw a line using DDA Algorithm.
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import java.applet.Applet; import java.awt.Graphics; public class DDA_extends Applet { public void paint(Graphics g) { double dx,dy,steps,x,y,j; double xc,yc; double x1=200, y1= 500, x2= 600, y2= 200; dx = x2-x1; dy = y2-y1; if(Math.abs(dx) > Math.abs(dy)) { steps = Math.abs(dx); } else steps = Math.abs(dy); xc = dx/steps; yc = dy/steps; x = x1; y = y1; //g.fillOval(x, y, width, height); g.fillOval((int)x, (int)y, 5, 5); for(j=1; j<=steps; j++) { x = x+xc; y= y+yc; g.fillOval((int)x, (int)y, 5, 5); System.out.println((int)y); } } } |
2.Write a java program to draw a line using Brasenhem Algorithm
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package computer_Graphics; import java.applet.*; import java.awt.*; public class Bresenhem extends Applet { double x1=200,y1=100,x2=300,y2=500; double dx,dy,steps,x,y,j; double xc,yc; public void paint(Graphics g) { int ch=6; dx=Math.abs(x2-x1); dy=Math.abs(y2-y1); x=x1; y=y1; double p=(2*dy)-(dx); int i=1; one: for(j=10;ch==6;j++) { g.fillOval((int)x,(int)y,5,5); while(p>=0) { y=y+1; p=p-(2*dx); } x=x+1; p=p+(2*dy); i++; if(i<=dx) ch=6; else break one; } } } |
3. Write a java program to draw a line using mid-point Algorithm.
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package computer_Graphics; import java.awt.*; import java.applet.*; public class MidPointCircle extends Applet { public void paint(Graphics g) { int xc=120; int yc=120; int rad=100; int X=0; int Y=rad; int p = 5/4-rad; while(X<Y) { if(p<0) { X++; p=p+2*X+2+1; } else { X++; Y--; p = p+2*X+2+1-2*Y+2; } g.fillOval(xc+X,yc+Y,2,2); g.fillOval(xc+Y,yc-X,2,2); g.fillOval(xc-Y,yc+X,2,2); g.fillOval(xc-X,yc+Y,2,2); g.fillOval(xc+X,yc-Y,2,2); g.fillOval(xc+Y,yc+X,2,2); g.fillOval(xc-Y,yc-X,2,2); g.fillOval(xc-X,yc-Y,2,2); } } } |
4.Write a java program to perform translation on a line.
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package computer_Graphics; import java.awt.Graphics; import javax.swing.JFrame; class Translation extends JFrame{ int x1 = 50; int y1 = 50; int x2 = 150; int y2 = 150; int tx = 200; int ty = 200; int px1,px2,py1,py2; public Translation() { setTitle("Line Translation"); setSize(500,500); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); px1 = x1+tx; px2 = x2+tx; py1 = y1+ty; py2 = y2+ty; setVisible(true); } public void paint(Graphics g) { g.drawLine(x1, y1, x2, y2); g.drawLine(px1, py1, px2, py2); } public static void main(String args[]) { new Translation(); } } |
5.Write a java program to […]
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