python, gasp question about draw_houses() function

Question

shasta90 0 Newbie Poster

13 Years Ago

http://www.daniweb.com/software-development/python/threads/187060/1572491#post1572491

based on a previous thread I would like to know how to replicate the appearance of a house five times on the gasp interface via the script below:

#!/usr/bin/env python

from gasp import * # import everything from the gasp library

begin_graphics(title="Houses At Night", background=color.BLACK) # open the graphics canvas

def draw_house(x, y):

Box((20, 20), 100, 100, filled=True, color=color.BLUE) # the house

Box((55, 20), 30, 50, filled=True, color=color.GREEN) # the door

Box((40, 80), 20, 20, filled=True, color=color.YELLOW) # the left window
Box((80, 80), 20, 20, filled=True, color=color.YELLOW) # the right window

a = (20, 120)

b = (70, 160)

c = (70, 120)

Polygon (([a, b , c]), filled=True, color=color.RED) #Left Roof

d = (70, 160)

e = (120, 120)

f = (70, 120)

Polygon (([d, e, f]), filled=True, color=color.RED) #Right Roof

draw_house(20, 100)
#Box((20 + x, 20 + y), 100 + x, 100 + y)

update_when('key_pressed') # keep the canvas open until a key is pressed

end_graphics() # close the canvas (which would happen
# anyway, since the script ends here, but it
# is better to be explicit).

However I am not too sure how to call the function draw_house() 5 times in order to appear on the screen, any ideas?

python

5 Contributors
13 Replies
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Latest Post 13 Years Ago Latest Post by ~s.o.s~

TrustyTony 888 pyMod

13 Years Ago

Code tags are generally good idea of getting response:

#!/usr/bin/env python

from gasp import *          # import everything from the gasp library

begin_graphics(title="Houses At Night", background=color.BLACK) # open the graphics canvas

def draw_house(x, y):
         
	Box((20, 20), 100, 100, filled=True, color=color.BLUE)     # the house

	Box((55, 20), 30, 50, filled=True, color=color.GREEN)       # the door
    
	Box((40, 80), 20, 20, filled=True, color=color.YELLOW)       # the left window
	Box((80, 80), 20, 20, filled=True, color=color.YELLOW)       # the right window

	a = (20, 120)

	b = (70, 160)

	c = (70, 120)
    
	Polygon (([a, b , c]), filled=True, color=color.RED) #Left Roof

	d = (70, 160)

	e = (120, 120)

	f = (70, 120)

	Polygon (([d, e, f]), filled=True, color=color.RED) #Right Roof

draw_house(20, 100)
#Box((20 + x, 20 + y), 100 + x, 100 + y)
    
update_when('key_pressed')  # keep the canvas open until a key is pressed

end_graphics()              # close the canvas (which would happen
                            # anyway, since the script ends here, but it
                            # is better to be explicit).

Also showing some of your failures, and how you tried to correct those, would help enormously getting sympathy to you. Don't be shy!

The fame of gasp as outdated stuff could hinder you, though.

Edited 13 Years Ago by TrustyTony because: n/a

vegaseat 1,735 DaniWeb's Hypocrite

13 Years Ago

gasp has had it's last gasp (no pun intended) a long time ago

For those who are curious, look here:
https://launchpad.net/gasp

Edited 13 Years Ago by vegaseat because: url

TrustyTony 888 pyMod

13 Years Ago

You have not set value for x. About code I can not say anything if you do not use CODE tags.

Edited 11 Years Ago by happygeek because: [code]

~s.o.s~ 2,560 Failure as a human

13 Years Ago

I did something similar a long back when I was playing around with Python. You can find my scribblings here; just adjust the method calls and you should be able to understand how it works. The trick here is to think in terms of co-ordinate, try to plot stuff on a piece of paper and then code for it. Also, please make sure you use the code only as a reference and try to come up with your own implementation. ;-)

Edited 13 Years Ago by ~s.o.s~ because: n/a

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shasta90 0 Newbie Poster · Answer 1 · 2011-06-02T14:24:42+00:00

Please don't mark this thread as solved when it is not and I know gasp is outdated but for the purposes of following a tutorial for learning python I would like to attempt to get this script working.

Here is the error code:

#!/usr/bin/env python

from gasp import *          # import everything from the gasp library

begin_graphics(title="Houses At Night", background=color.BLACK) # open the graphics canvas

def draw_house(x, y):
         
	Box((20, 20), 100, 100, filled=True, color=color.BLUE)     # the house

	Box((55, 20), 30, 50, filled=True, color=color.GREEN)       # the door
    
	Box((40, 80), 20, 20, filled=True, color=color.YELLOW)       # the left window
	Box((80, 80), 20, 20, filled=True, color=color.YELLOW)       # the right window

	a = (20, 120)

	b = (70, 160)

	c = (70, 120)
    
	Polygon (([a, b , c]), filled=True, color=color.RED) #Left Roof

	d = (70, 160)

	e = (120, 120)

	f = (70, 120)

	Polygon (([d, e, f]), filled=True, color=color.RED) #Right Roof

draw_house(20, 100)
Box((20 + x, 20 + y), 100 + x, 100 + y)
Polygon((20 + x, 20 + y), 100 + x, 100 + y)
    
update_when('key_pressed')  # keep the canvas open until a key is pressed

end_graphics()              # close the canvas (which would happen
                            # anyway, since the script ends here, but it
                            # is better to be explicit).

ERROR here:

~$ python house.py
Traceback (most recent call last):
File "house.py", line 33, in <module>
Box((20 + x, 20 + y), 100 + x, 100 + y)
NameError: name 'x' is not defined

shasta90 0 Newbie Poster · Answer 2 · 2011-06-15T17:10:32+00:00

You have not set value for x. About code I can not say anything if you do not use [code] tags.

Yes but the draw house function needs to edited in order to call the preceding function correctly as currently it still does not work even if x is defined as below:

draw_house(20, 100)
Box((20 + x, 20 + y), 100 + x, 100 + y)
Polygon((20 + x, 20 + y), 100 + x, 100 + y)

shasta90 0 Newbie Poster · Answer 3 · 2011-06-29T20:58:09+00:00

shasta90 0 Newbie Poster

13 Years Ago

Any more suggestions to the issue above?

vegaseat 1,735 DaniWeb's Hypocrite Team Colleague · Answer 4 · 2011-07-05T17:57:10+00:00

Try it this way ...

#!/usr/bin/env python

from gasp import *          # import everything from the gasp library

begin_graphics(title="Houses At Night", background=color.BLACK) # open the graphics canvas

def draw_house(x, y):
         
	Box((20, 20), 100, 100, filled=True, color=color.BLUE)     # the house

	Box((55, 20), 30, 50, filled=True, color=color.GREEN)       # the door
    
	Box((40, 80), 20, 20, filled=True, color=color.YELLOW)       # the left window
	Box((80, 80), 20, 20, filled=True, color=color.YELLOW)       # the right window

	a = (20, 120)

	b = (70, 160)

	c = (70, 120)
    
	Polygon (([a, b , c]), filled=True, color=color.RED) #Left Roof

	d = (70, 160)

	e = (120, 120)

	f = (70, 120)

	Polygon (([d, e, f]), filled=True, color=color.RED) #Right Roof

x = 20
y = 100
draw_house(x, y)
# now x and y are set
Box((20 + x, 20 + y), 100 + x, 100 + y)
Polygon((20 + x, 20 + y), 100 + x, 100 + y)
    
update_when('key_pressed')  # keep the canvas open until a key is pressed

end_graphics()              # close the canvas (which would happen
                            # anyway, since the script ends here, but it
                            # is better to be explicit).

shasta90 0 Newbie Poster · Answer 5 · 2011-07-06T16:54:30+00:00

Received this error message:

:~$ python house.py
Traceback (most recent call last):
File "house.py", line 37, in <module>
Polygon((20 + x, 20 + y), 100 + x, 100 + y)
File "/usr/lib/pymodules/python2.6/gasp/api.py", line 264, in __init__
else: raise backend.GaspException("points must be a list")
gasp.backend.GaspException: 'points must be a list'

shasta90 0 Newbie Poster · Answer 6 · 2011-07-14T17:55:12+00:00

Thanks to ~s.o.s.~ for his coding as a reference, I understood that variables x and y must be part of the draw_house function in order to work as shown below:

#!/usr/bin/env python

from gasp import *          # import everything from the gasp library

begin_graphics(title="Houses At Night", background=color.BLACK) # open the graphics canvas

def draw_house(x, y):
         
	Box((x + 20, y + 20), 100, 100, filled=True, color=color.BLUE)     # the house

	Box((x + 55, y + 20), 30, 50, filled=True, color=color.GREEN)       # the door
    
	Box((x + 40, y + 80), 20, 20, filled=True, color=color.YELLOW)       # the left window
	Box((x + 80, y + 80), 20, 20, filled=True, color=color.YELLOW)       # the right window

	a = (x + 20, y + 120)

	b = (x + 70, y + 160)

	c = (x + 70, y + 120)
    
	Polygon (([a, b , c]), filled=True, color=color.RED) #Left Roof

	d = (x + 70, y + 160)

	e = (x + 120, y + 120)

	f = (x + 70, y + 120)

	Polygon (([d, e, f]), filled=True, color=color.RED) #Right Roof

#bottom row
draw_house(0, 0)
draw_house(200, 0)
draw_house(400, 0)

#middle row
draw_house(100, 140)
draw_house(300, 140)

#top row
draw_house(200, 280)


    
update_when('key_pressed')  # keep the canvas open until a key is pressed

end_graphics()              # close the canvas (which would happen
                            # anyway, since the script ends here, but it
                            # is better to be explicit).

~s.o.s~ 2,560 Failure as a human Team Colleague Featured Poster · Answer 7 · 2011-07-14T18:26:12+00:00

Glad it worked out well for you, good luck with your project! :-)

DragonSlayerX 0 Newbie Poster · Answer 8 · 2011-08-08T21:07:32+00:00

I have one question. Why did you make 2 different polygons for roofs. Just wondering because I'm doing a similar program and the polygon isn't working.

~s.o.s~ 2,560 Failure as a human Team Colleague Featured Poster · Answer 9 · 2011-08-09T00:20:31+00:00

Those are not really required, it's just another different (more verbose?) way of drawing the roof. My code snippet referenced on the first page works fine with one polygon.