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About Me

Name: Chen Ma

E-mail: [email protected]

2D Curve Drawing System

Overview

This project is a 2D drawing system that is able to draw Bézier and B-spline curves, and should also be able to open and save files.

Specifications

• User should be able to specify:
  • the name of the input file,
  • all parapmeters in the Bézier and B-Spline curves' equation.

Preface

First of all, wish you have a good time playing with it. I added a lot of my own ideas into this project and devoted a lot of time on it. I made my own decisions on the layout and user interface and tried my best to provide the user with best experience; if you have any suggestions on improving the user experience, please do not hesitate to e-mail me.

Manual

Running the program

1. Open terminal and open the folder
2. Type make to compile the code and type ./project4 filename to run, or just type ./project4 if you don't want to open any file or you don't want to save drawing as a specific filename.
   • filename
     • the file you want to open (if the file exists)
     • the filename you want to use to save (if the file doesn't exist)
     • e.g.: type ./project4 apple.txt, if you want to save the drawing as apple.txt or if you want to open the file apple.txt
   • In case of compile error, these is a precompiled file called project4

Extra

• Three windows
  • Color Picker Panel
    • Set current curve color
  • Main Drawing Panel
    • Draw and edit curve
    • Change current curve parameters
    • Change current stroke width
  • Knot Panel
    • Change current knot position
• Different windows have different reshape approach
  • Color Picker Panel is non-resizable
  • Main Drawing Panel can be freely resized
  • Knot Panel is resized according to the Main Drawing Panel

Manipulation

Key-pressing note: you do not need to press shift, and all key is in low cap.

• Press "b" to start drawing Bézier curve
  • Press again to end drawing
  • This color is used for the control points and lines of Bézier curves
• Press "p" to start drawing B-spline curve
  • Press again to end drawing
  • This color is used for the control points and lines of B-spline curves
• Press "a" to show all control points
  • Press again to hide
• Press "d" to delete control points
  • This color is used for indicating delete points.
• Press "i" to insert control points
  • Click and drag from current existing control points to add
  • This color is used for indicating insert points.
• Click on the curve's control point to select the curve
• Press "↑", "↓" to change the resolution of selected curve
• Press "←", "→" to change the k value of selected B-spline curve (default k = 3)
• Press "[", "]" to change stroke width of selected curve.
• Click on the Color Picker to set color for selected curve.
• Drag on the knot bar to change the knots of current B-spline curve
• Press "s" to save the drawing
  • If no filename is specified in the beginning, then it will save as curves.txt

Quit

• Press "cmd+q" to quit
• Give me 100 points (more is better)