2D Graphics animation -bouncing ball (Python)

1. NADAR SARASWATHI COLLEGE OF ARTS AND SCIENCE,
VADAPUTHUPATTI,THENI.
DEPARTEMENT OF COMPUTER SCIENCE
2D Graphics Animation –Bouncing Ball
PRESENTED BY:
S.AISHWARYA LAKSHMI I M.SC(CS)

2. What is Python?
 Python is an interpreted, object-oriented, high-level programming
language with dynamic semantics.
 Its high-level built in data structures, combined with dynamic
typing and dynamic binding, make it very attractive for Rapid
Application Development, as well as for use as a scripting or glue
language to connect existing components together.
 Python's simple, easy to learn syntax emphasizes readability and
therefore reduces the cost of program maintenance.
 Python supports modules and packages, which encourages program
modularity and code reuse.

3. What can Python do?
 Python can be used on a server to create web applications.
 Python can be used alongside software to create workflows.
 Python can connect to database systems. It can also read and
modify files.
 Python can be used to handle big data and perform complex
mathematics.
 Python can be used for rapid prototyping, or for production-ready
software development.

4. Why Python?
 Python works on different platforms (Windows, Mac, Linux,
Raspberry Pi, etc.)
 Python has a simple syntax similar to the English language.
 Python has syntax that allows developers to write programs with
fewer lines than some other programming languages.
 Python runs on an interpreter system, meaning that code can be
executed as soon as it is written. This means that prototyping can
be very quick.
 Python can be treated in a procedural way, an object-oriented way
or a functional way.

5. 2D graphics animation
 2D computer graphics started in the 1950s, based on VECTOR
GRAPHICS DEVICES. These were largely supplanted by RASTER
BASED DEVICES in the following decades.
 The POST SCRIPT: post script is the programming language
optimized for printing graphics and text.
 The main purpose of postscript was to provide in which to describe
images in a device independent manner.

6. 2D graphics animation
 And the X WINDOW SYSTEM protocol were landmark
developments in the field.
 X window provides the basic framework for a GUI environment:
drawing and moving windows on the display device and interacting
with a mouse and keyboard.
 X window does not mandate the user interface – this is handled by
individual programs.
 As such, the visual styling of X-based environments varies greatly;
different programs may present radically different interfaces.

7. 2D graphics animation
 2D computer graphics are mainly used in applications that were
originally developed for
traditional printing and drawing technologies, such
as typography, cartography, technical drawing, advertising, etc.

8. 2D graphic animation
 In those applications, the two-dimensional images is not just a
representation of a real-world object.
 two-dimensional models are therefore preferred, because they
give more direct control of the image than 3D Computer graphic.

9. GRAPHICS MODELS
 2D graphics models may combine :
 Geometric Model (also called Vector graphics),
 Digital images (also called Raster graphics),
 Text to be typeset (defined by content, font style and size, color,
position, and orientation),
 Mathematical functions and equations, and more.
 These components can be modified and manipulated by two
dimensional geometric transformations such as translation ,
rotation , scaling.

10. BOUNCING BALL
01 from visual import*
02 ground= box(size=(10,0.1,10), color = color. White , material=
03 =materials . wood)
04 ball=sphere(pos=(0,4,0),radius=1,color=color . yellow)
05
06 scene. Center = vector(0,5,5)
07 Velocity = 10
08 e = 0.9
09 dt =0.01
10 While True:
(cont…..)

11. BOUNCING BALL
11 rate(300)
12 prevPos = ball.Y
13 ball.y+= velocity * dt
14 If ball.y < ball . radius:
15 Velocity = -velocity * e
16 ball.y = ball . radius
17 if( prevpos –ball.y)==0:
18 Break
19 Velocity =velocity-9.81*dt.

12. ANIMATION-BOUNCING BALL
The animation is a continuous sequence of graphics ,
often termed as Frames , that are played back to back with respect
to time. We create an animation of a bouncing ball.
EXPLANATION:
02 ground= box(size=(10,0.1,10), color = color. White , material=
03 =materials . wood)
04 ball=sphere(pos=(0,4,0),radius=1,color=color . yellow)
In this we create a base ground using a box object and a
ball using sphere object and we have define their attributes .

13. ANIMATION-BOUNCING BALL
EXPLANATION:
06 scene. Center = vector(0,5,5)
The center point of thee visual display window is positioned
at(0,5,5).
07 Velocity = 10
08 e = 0.9
The ball is projected with an initial velocity
10 units/sec . In the direction of Y-axis, and the coefficient of restitution is
0.9.
09 dt =0.01
Change in time dt is set to 0.01sec.
10 While True:
The while loop produces a bouncing ball animation

14. ANIMATION-BOUNCING BALL
EXPLANATION:
11 rate(300)
Function rate defines a maximum number of loop per second.
12 prevPos = ball.Y
13 ball.y+= velocity * dt
The position of the bouncing ball in each iteration is updated using
current velocity and time.
14 If ball.y < ball . radius:
15 Velocity = -velocity * e
The current position of the is less than the radius of the ball, it
touches the floor. In this case , the velocity of the ball is negated changing the
direction of motion and its position is set to coordinates.
Velocity= u + a*t.

15. ANIMATION-BOUNCING BALL
EXPLANATION:
And we can set the visual display window to full screen by
using the following command .
scene.fullscreen = True

16. THANK YOU!!!