Difference between revisions of "CSC111 Lab 11 2014"
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− | =Download | + | =Creating the Graphics Library= |
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+ | The graphics library written by Horstmann, the author of our textbook is available [[CSC111 Horstmann's Graphics Library|here]]. Download it and create a file called '''graphics.py''' in your current directory. | ||
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=Simple Test= | =Simple Test= |
Revision as of 17:35, 15 April 2014
--D. Thiebaut (talk) 17:42, 13 April 2014 (EDT)
Contents
- 1 Creating the Graphics Library
- 2 Simple Test
- 3 Improve on it
- 4 Draw circles
- 5 Create a Rectangle Class
- 6 Create a Circle Class
- 7 Create a Circle Class with a Center
- 8 Create a class Wheel that contains two concentric circles
- 9 Generate 200 random wheels on the canvas
- 10 Create a new Class that is a car
- 11 Create a car with a top
Creating the Graphics Library
The graphics library written by Horstmann, the author of our textbook is available here. Download it and create a file called graphics.py in your current directory.
Simple Test
from graphicsH import GraphicsWindow
MAXWIDTH = 800
MAXHEIGHT = 600
def main():
win = GraphicsWindow(MAXWIDTH, MAXHEIGHT)
canvas = win.canvas()
canvas.setFill( 255, 0, 0 ) # full red
canvas.drawRect( 100, 100, 300, 200 )
win.wait()
main()
Improve on it
- Try with different colors by picking a different combination of the three ints in setFill()
- Try a random color. Hints: to generate a random number between 0 and 255, you can do this:
# at the top of the program from random import seed from random import randrange def main(): seed() ... x = randrange( 256 ):
Challenge
Generate 500 random rects of random colors at random locations
Draw circles
Create a Rectangle Class
from graphics import GraphicsWindow
from random import randrange
from random import seed
from time import sleep
MAXWIDTH = 800
MAXHEIGHT= 600
class Rectangle:
def __init__( self, x, y, width, height, color ):
self._x = x
self._y = y
self._width = width
self._height = height
self._color = color # list of 3 ints between 0 and 255
def draw( self, canvas ):
canvas.setFill( self._color[0], self._color[1], self._color[2] )
canvas.drawRect( self._x, self._y, self._width, self._height )
def twoRects( canvas ):
rect1 = Rectangle( 100, 100, 500, 20, (255, 0, 0 ) )
rect1.draw( canvas )
rect2 = Rectangle( 200, 200, 50, 200, (165, 76, 89 ) )
rect2.draw( canvas )
def fiveHundredRects( canvas ):
for i in range( 500 ):
x = randrange( MAXWIDTH*3//4 )
y = randrange( MAXHEIGHT *3//4 )
w = randrange( MAXWIDTH // 2 )
h = randrange( MAXHEIGHT // 2 )
red = randrange( 256 )
green = randrange( 256 )
blue = randrange( 256 )
rect = Rectangle( x, y, w, h, (red, green, blue ) )
rect.draw( canvas )
def main():
seed()
win = GraphicsWindow(MAXWIDTH, MAXHEIGHT)
canvas = win.canvas()
#twoRects( canvas )
fiveHundredRects( canvas )
win.wait()
win.close()
main()
Create a Circle Class
Use the example of Rectangle
Create a Circle Class with a Center
Modify the class so that the x and y passed are the x and y of the center of the circle.
Create a class Wheel that contains two concentric circles
The inside circle will be concentric with the outside one, and will always have a radius half the radius of the large one.
Generate 200 random wheels on the canvas
Create a new Class that is a car
- one rectangle
- two wheels
- x, y of top left corner of rectangle
- width and height of rectangle.
- center of 1st wheel 1/4 width from left of car
- center of 2nd wheel 1/4 width from right of car
- radius of wheel = 1/8 of car width