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GUI using C++ and QtYHL 1
ECE 462 C++ and Java
Lab Exercise 03Graphical User Interface
using C++ and Qt
Yung-Hsiang Luyunglu@purdue.edu
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Install Qt in Your Computer
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Scroll Down
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Install Qt in Linux
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for Linux
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Install in Linux
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installation complete
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execute Qt designer
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To compile a Qt program:1. qmake -project2. qmake3. make
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Install Qt in Windows
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Install in Windows
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Qt Documentation
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Sample Qt Program
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1. qmake –project2. qmake3. make
executable
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Develop Qt Project in Netbeans
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Add Buttons and Labels
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Handle User Inputs (Signals)
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signal = event (in Java)slot = handler
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Add Paddles and a Bouncing Ball
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Move BallTrack Mouse
Detect Collision
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Law of Reflection
• S: surface of collision• N: normal vector, N ⊥ S• I: incident vector• R: reflection vector• a: angle between I and N• b: angle between R and N• law of reflection: a = b• If N, I, and R are unit vectors (|N| = |I| = |R| = 1),
R - I = 2 N ⋅ (-I), here ⋅ is the inner product.⇒ R = I - 2 N ⋅ I
ab
N
S
IR
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Ball Hits Paddle
• Both are circles. The normal vector is the vector connecting the center of the ball and the center of the paddle.
• Collision occurs when the distance between the two centers is smaller than the sum of the radii.
N
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Exercise Requirements
1. Make the right paddle follow the ball's vertical coordinate.
2. Detect collision between the right paddle and the ball and make the ball bounce.
3. Update the ball's position and direction.
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Submission: A zip file of the CVS repository
Remember to commit all changes first.Submit this exercise only.
Do not submit any other exercise. Do not submit a wrong zip file.
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