Chapter 3G, Problem 4PP

Program Plan Intro

Draw a given image

Program plan:

• Import necessary package.
• Create a class “DrawImage”,
  • Declare a static final variable.
  • Define the “main()” method,
    • Declare initial velocity.
    • Convert initial velocity to degree.
    • Initialize the number of steps.
    • Call the method “calculate_formula()” to compute the point.
  • Define the method “calculate_formula()”,
    • Construct “DrawingPanel” object.
    • Create Graphics object and call the “getGraphics()” method .
    • Compute the velocities by formula.
    • Compute the time.
    • Initialize the necessary variables.
    • Calculate the necessary values.
    • Set panel’s background color as “CYAN”.
    • Call the method “draw_Dot()”.
    • Execute loop over number of steps,
      • Compute the elapsed time.
      • Compute the points to draw the dot.
      • Compute current y velocity.
      • Call the method “draw_Dot()”.
  • Define the method “draw_Dot()”,
    • Assign the initial radius.
    • Initialize the necessary values.
    • Fill the oval shape.