I'm sure this is so easy that it will hurt for anyone to read it, but I
really need some direction. I'm trying to create a color chart (RGB) that
shows steps between two different colors as entered by the user. I know the
web script must convert the values into integers, store them as variables
and then output them, but I cannot seem to establish the calculation for
this. I'm attaching the html I've got, that works when the page is static,
and I know I need to create a fraction for each color by using the formula,
fraction = (i+1.0)/nsteps
r = (1-fraction)*red1 + fraction*red2
but the program won't recognize i... anyway, here is the html...if anyone
can give me any help I'd be so grateful!!
Thanks,
Krista
import cgi
form = cgi.FieldStorag e()
print "Content-type: text/html"
print
print """<!DOCTYP E html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>Colour Blend</title>
<style type="text/css">
#blend {
width: 10em;
padding: 0;
border: 1px solid black;
margin-left: 3em;
}
..colourblock {
width: 10em;
height: 1em;
}
</style>
</head>
<body>
<h1>Colour Blend</h1>
<p>
Here is a mix of the two colours you specified:
</p>
<div id="blend">
<div class="colourbl ock" style="backgrou nd-color: rgb(100.0%,10.0 %,10.0%)">
</div>
<div class="colourbl ock" style="backgrou nd-color: rgb(100.0%,20.0 %,20.0%)">
</div>
<div class="colourbl ock" style="backgrou nd-color: rgb(100.0%,30.0 %,30.0%)">
</div>
<div class="colourbl ock" style="backgrou nd-color: rgb(100.0%,40.0 %,40.0%)">
</div>
<div class="colourbl ock" style="backgrou nd-color: rgb(100.0%,50.0 %,50.0%)">
</div>
<div class="colourbl ock" style="backgrou nd-color: rgb(100.0%,60.0 %,60.0%)">
</div>
<div class="colourbl ock" style="backgrou nd-color: rgb(100.0%,70.0 %,70.0%)">
</div>
<div class="colourbl ock" style="backgrou nd-color: rgb(100.0%,80.0 %,80.0%)">
</div>
<div class="colourbl ock" style="backgrou nd-color: rgb(100.0%,90.0 %,90.0%)">
</div>
<div class="colourbl ock" style="backgrou nd-color:
rgb(100.0%,100. 0%,100.0%)"> </div>
</div>
</body>
</html>""" 7  1816 
On Wed, 14 Jul 2004 05:55:49 GMT, "Krista Bailie" <ba*****@telus. net>
declaimed the following in comp.lang.pytho n: I'm sure this is so easy that it will hurt for anyone to read it, but I
really need some direction. I'm trying to create a color chart (RGB) that
shows steps between two different colors as entered by the user. I know the
web script must convert the values into integers, store them as variables
and then output them, but I cannot seem to establish the calculation for
this. I'm attaching the html I've got, that works when the page is static,
and I know I need to create a fraction for each color by using the formula,
fraction = (i+1.0)/nsteps
r = (1-fraction)*red1 + fraction*red2
but the program won't recognize i... anyway, here is the html...if anyone
can give me any help I'd be so grateful!!
Where's the INPUT HTML? I presume you display something from
which the user is supposed to pick two colors. If "i" is one of the
fields being returned from the input HTML then...
Thanks,
Krista
import cgi
form = cgi.FieldStorag e()
.... it would be accessed as
form["i"]
(unless I misread the help file for the cgi module).
Without knowing the input HTML, it is difficult to guess what
the data looks like. Does the user enter first RGB, then second RGB? Are
the RGB entries triplets in the range 0..255, or 0.0 .. 1.0, or
singletons of the form RRGGBB where each RR, GG, BB is in the range
00..FF?
It looks like the output wants percentages, so you'd have to
divide each part of the triplet by (100.0/255.0), or just multiple by
100.0 if the range was 0.0 .. 1.0. I leave the third variant for the
student <G>
start = int(raw_input(" Start value> "))
end = int(raw_input(" End value> "))
steps = int(raw_input(" Number of steps> "))
if start > end:
print "Swapping start and end points"
(start, end) = (end, start)
span = end - start
incr = float(span) / steps
print "Data Point Value"
for n in range(steps+1):
print " %5s %5s (%5s)" % (n,
int(start + incr * n),
(start + incr * n))
Input:
5
18
10
Output:
Data Point Value
0 5 ( 5.0)
1 6 ( 6.3)
2 7 ( 7.6)
3 8 ( 8.9)
4 10 ( 10.2)
5 11 ( 11.5)
6 12 ( 12.8)
7 14 ( 14.1)
8 15 ( 15.4)
9 16 ( 16.7)
10 18 ( 18.0)
Input:
240
128
8
Output:
Swapping start and end points
Data Point Value
0 128 (128.0)
1 142 (142.0)
2 156 (156.0)
3 170 (170.0)
4 184 (184.0)
5 198 (198.0)
6 212 (212.0)
7 226 (226.0)
8 240 (240.0)
Extrapolate for three color components (I'm assuming you want to
do this in RGB coordinates -- you'll likely get different results if you
convert the end-points to HSV and interpolate through that coordinate,
then convert back to RGB)
-- =============== =============== =============== =============== == <
wl*****@ix.netc om.com | Wulfraed Dennis Lee Bieber KD6MOG <
wu******@dm.net | Bestiaria Support Staff <
=============== =============== =============== =============== == <
Home Page: <http://www.dm.net/~wulfraed/> <
Overflow Page: <http://wlfraed.home.ne tcom.com/> <
Krista Bailie schrieb: and I know I need to create a fraction for each color by using the formula,
fraction = (i+1.0)/nsteps
r = (1-fraction)*red1 + fraction*red2
but the program won't recognize i... anyway, here is the html...if anyone
can give me any help I'd be so grateful!!
def longtorgb(c):
'''long to (r,g,b) tuple assuming that r
the r bits are high and the b bits are low'''
return ((c & 0xff0000) >> 16, (c & 0xff00) >> 8, c & 0xff)
colorstring = ""
for i in range(nsteps+1) :
fraction = i/nsteps
mix = (1-fraction)*red1 + fraction*red2
rgb = longtorgb(mix)
colorstring += "color %d is rgb(%d,%d,%d)\n " % ((i,)+rgb)
This is a start. You can insert tuples in a html string with the
formatting operator (%). Literal % characters in the string have to
be doubled if you are using the formatting operator.
Mit freundlichen Gruessen,
Peter Maas
--
-------------------------------------------------------------------
Peter Maas, M+R Infosysteme, D-52070 Aachen, Tel +49-241-93878-0
E-mail 'cGV0ZXIubWFhc0 BtcGx1c3IuZGU=\ n'.decode('base 64')
-------------------------------------------------------------------
On Wed, 14 Jul 2004, Dennis Lee Bieber wrote: Where's the INPUT HTML? I presume you display something from
which the user is supposed to pick two colors. If "i" is one of the
fields being returned from the input HTML then...
... it would be accessed as
form["i"]
(unless I misread the help file for the cgi module).
You did ;) It's form["i"].value (form["i"] returns a FieldStorage
instance).
On Wed, 14 Jul 2004 10:05:41 -0400, Christopher T King
<sq******@WPI.E DU> declaimed the following in comp.lang.pytho n:
You did ;) It's form["i"].value (form["i"] returns a FieldStorage
instance).
Ah well... It would, at least, have returned /something/,
opposed to referencing an undefined i
-- =============== =============== =============== =============== == <
wl*****@ix.netc om.com | Wulfraed Dennis Lee Bieber KD6MOG <
wu******@dm.net | Bestiaria Support Staff <
=============== =============== =============== =============== == <
Home Page: <http://www.dm.net/~wulfraed/> <
Overflow Page: <http://wlfraed.home.ne tcom.com/> <
Okay, I've almost got this, but I still don't understand how to actually
make the data appear. It is supposed to show up in bars(nsteps) that blend
one color to the other, but I can only get the static html colors to show.
Should I just erase the html div class info and put in a formula instead?
(File is below...)
Many, many thanks,
Krista
import cgi
form = cgi.FieldStorag e()
def longtorgb(c):
'''long to (r,g,b) tuple assuming that r
the r bits are high and the b bits are low'''
return ((c & 0xff0000) >> 16, (c & 0xff00) >> 8, c & 0xff)
def nsteps():
nsteps = int(raw_input(" steps> "))
def red1():
red1 = int(raw_input(" red1> "))
def red2():
red2 = int(raw_input(" red2> "))
def blue1():
blue1 = int(raw_input(" blue1> "))
def blue2():
blue2 = int(raw_input(" blue2> "))
def green1():
green1 = int(raw_input(" green1> "))
def green2():
green2 = int(raw_input(" green2> "))
colorstring = ""
def fraction():
fraction = i/nsteps
def mix():
mix = (1-fraction)*blue1 + fraction*blue2
mix = (1-fraction)*red1 + fraction*red2
mix = (1-fraction)*green 1 + fraction*green2
def rgb():
rgb = longtorgb(mix)
colorstring += "color %d is rgb(%d,%d,%d)\n " % ((i,)+rgb)
print "Content-type: text/html"
print
print """<!DOCTYP E html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>Colour Blend</title>
<style type="text/css">
#blend {
width: 10em;
padding: 0;
border: 1px solid black;
margin-left: 3em;
}
..colourblock {
width: 10em;
height: 1em;
}
</style>
</head>
<body>
<h1>Colour Blend</h1>
<p>
Here is a mix of the two colours you specified:
</p>
<div id="blend">
<div class="colourbl ock" style="backgrou nd-color: rgb(100.0%,10.0 %,10.0%)">
</div>
<div class="colourbl ock" style="backgrou nd-color: rgb(100.0%,20.0 %,20.0%)">
</div>
<div class="colourbl ock" style="backgrou nd-color: rgb(100.0%,30.0 %,30.0%)">
</div>
<div class="colourbl ock" style="backgrou nd-color: rgb(100.0%,40.0 %,40.0%)">
</div>
<div class="colourbl ock" style="backgrou nd-color: rgb(100.0%,50.0 %,50.0%)">
</div>
<div class="colourbl ock" style="backgrou nd-color: rgb(100.0%,60.0 %,60.0%)">
</div>
<div class="colourbl ock" style="backgrou nd-color: rgb(100.0%,70.0 %,70.0%)">
</div>
<div class="colourbl ock" style="backgrou nd-color: rgb(100.0%,80.0 %,80.0%)">
</div>
<div class="colourbl ock" style="backgrou nd-color: rgb(100.0%,90.0 %,90.0%)">
</div>
<div class="colourbl ock" style="backgrou nd-color:
rgb(100.0%,100. 0%,100.0%)"> </div>
</div>
</div>
</body>
</html>"""
"Krista Bailie" <ba*****@telus. net> wrote in message
news:FV3Jc.4351 4$Rf.4604@edtnp s84... I'm sure this is so easy that it will hurt for anyone to read it, but I
really need some direction. I'm trying to create a color chart (RGB) that
shows steps between two different colors as entered by the user. I know
the web script must convert the values into integers, store them as variables
and then output them, but I cannot seem to establish the calculation for
this. I'm attaching the html I've got, that works when the page is
static, and I know I need to create a fraction for each color by using the
formula, fraction = (i+1.0)/nsteps
r = (1-fraction)*red1 + fraction*red2
but the program won't recognize i... anyway, here is the html...if anyone
can give me any help I'd be so grateful!!
Thanks,
Krista
import cgi
form = cgi.FieldStorag e()
print "Content-type: text/html"
print
print """<!DOCTYP E html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>Colour Blend</title>
<style type="text/css">
#blend {
width: 10em;
padding: 0;
border: 1px solid black;
margin-left: 3em;
}
.colourblock {
width: 10em;
height: 1em;
}
</style>
</head>
<body>
<h1>Colour Blend</h1>
<p>
Here is a mix of the two colours you specified:
</p>
<div id="blend">
<div class="colourbl ock" style="backgrou nd-color:
rgb(100.0%,10.0 %,10.0%)"> </div>
<div class="colourbl ock" style="backgrou nd-color:
rgb(100.0%,20.0 %,20.0%)"> </div>
<div class="colourbl ock" style="backgrou nd-color:
rgb(100.0%,30.0 %,30.0%)"> </div>
<div class="colourbl ock" style="backgrou nd-color:
rgb(100.0%,40.0 %,40.0%)"> </div>
<div class="colourbl ock" style="backgrou nd-color:
rgb(100.0%,50.0 %,50.0%)"> </div>
<div class="colourbl ock" style="backgrou nd-color:
rgb(100.0%,60.0 %,60.0%)"> </div>
<div class="colourbl ock" style="backgrou nd-color:
rgb(100.0%,70.0 %,70.0%)"> </div>
<div class="colourbl ock" style="backgrou nd-color:
rgb(100.0%,80.0 %,80.0%)"> </div>
<div class="colourbl ock" style="backgrou nd-color:
rgb(100.0%,90.0 %,90.0%)"> </div>
<div class="colourbl ock" style="backgrou nd-color:
rgb(100.0%,100. 0%,100.0%)"> </div>
</div>
</body>
</html>"""
Krista Bailie schrieb: Okay, I've almost got this, but I still don't understand how to actually
make the data appear.
import cgi
def longtorgb(c):
'''long to (r,g,b) tuple assuming that the
r bits are high and the b bits are low'''
return ((c & 0xff0000) >> 16, (c & 0xff00) >> 8, c & 0xff)
if __name__ == '__main__':
form = cgi.FieldStorag e()
# fetch input
#col1 = int(form['color1'].value)
#col2 = int(form['color2'].value)
# test only , to be deleted
col1 = 0xff # blue
col2 = 0xff00 # green
nsteps = 5
print col1, col2
# print header
print 'Content-type: text/html\n'
# print static part 1
print '''
<html>
<head>
<title>
Blending colors
</title>
</head>
<body>
Here is a mix of the two colours you specified:
'''
# print blend fields
for i in range(nsteps+1) :
fraction = float(i)/nsteps
mix = int((1.0-fraction)*col1 + fraction*col2)
rgb = longtorgb(mix)
print '''
<div style="width: 50px; height: 20px; background: rgb(%d,%d,%d)">
step %d
</div>
''' % (rgb+(i,))
# print static part 2
print '''
</body>
</html>
'''
Mit freundlichen Gruessen,
Peter Maas
--
-------------------------------------------------------------------
Peter Maas, M+R Infosysteme, D-52070 Aachen, Tel +49-241-93878-0
E-mail 'cGV0ZXIubWFhc0 BtcGx1c3IuZGU=\ n'.decode('base 64')
-------------------------------------------------------------------
Peter Maas schrieb: import cgi
def longtorgb(c):
'''long to (r,g,b) tuple assuming that the
r bits are high and the b bits are low'''
[...]
Sorry, serious error. longtorgb is nonlinear so the _tuples_
have to be mixed, not the integers. You probably want to work
with tuples only so you can drop the conversion crap. Correct
code:
import cgi
def rgbtolong(rgb):
'''(r,g,b) tuple to long assuming that the
r bits are high and the b bits are low'''
return (rgb[0] << 16) + (rgb[1] << 8) + rgb[2]
def longtorgb(c):
'''long to (r,g,b) tuple assuming that the
r bits are high and the b bits are low'''
return ((c & 0xff0000) >> 16, (c & 0x00ff00) >> 8, c & 0xff)
if __name__ == '__main__':
form = cgi.FieldStorag e()
# fetch input
#col1 = int(form['color1'].value)
#col2 = int(form['color2'].value)
col1 = 0xff # blue
col2 = 0xff0000 # red
rcol1 = longtorgb(col1)
rcol2 = longtorgb(col2)
nsteps = 20
# print header
print 'Content-type: text/html\n'
# print static part 1
print '''
<html>
<head>
<title>
Blending colors
</title>
</head>
<body>
Here is a mix of the two colours you specified:
'''
# print blend fields
for i in range(nsteps+1) :
fraction = float(i)/nsteps
mix = (int((1.0-fraction)*rcol1[0] + fraction*rcol2[0]),
int((1.0-fraction)*rcol1[1] + fraction*rcol2[1]),
int((1.0-fraction)*rcol1[2] + fraction*rcol2[2]))
print '''
<div style="width: 100px; height: 5px; background: rgb(%d,%d,%d)">
step %d
</div>
''' % (mix+(i,))
# print static part 2
print '''
</body>
</html>
'''
Mit freundlichen Gruessen,
Peter Maas
--
-------------------------------------------------------------------
Peter Maas, M+R Infosysteme, D-52070 Aachen, Tel +49-241-93878-0
E-mail 'cGV0ZXIubWFhc0 BtcGx1c3IuZGU=\ n'.decode('base 64')
------------------------------------------------------------------- This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
by: Govind |
last post by:
Hi All,
I want to Convert 32 bit integers to byte in right alighed format .
For 32 = the usual way is BitConverter.GetBytes(int32)==> xx xx 00 00 , but
i want right aligned like 00 00 xx xx.Is there any way.
Regards,
Govind.
|
by: David Williams |
last post by:
Hi all, i have been able to convert an ASCII character to an INT however im
lost as to how to change them back. Cant find anything on the net (though im
probably looking in the wrong places!). Could anyone help me out?
Thanks
Dave
|
by: prabha |
last post by:
Hello Everybody,
I have to conert the word doc to multiple html files,according to the templates in the word doc.
I had converted the word to xml.Also through Exsl ,had finished the multiple output html files.
The problem is while reading through the worddoc paragraph,the special characters are not identified.
So in the xml file,it's just storing that as "?".So I couldn't able to retrive the characters in my ouput html files.
|
by: CoreyWhite |
last post by:
Problem:
You have numbers in string format, but you need to convert them to a
numeric type, such as an int or float.
Solution:
You can do this with the standard library functions. The functions
strtol, strtod, and strtoul, defined in <cstdlib>, convert a null-
terminated character string to a long int, double, or unsigned long.
You can use them to convert numeric strings of any base to a numeric
|
by: py_genetic |
last post by:
Hello,
I'm importing large text files of data using csv. I would like to add
some more auto sensing abilities. I'm considing sampling the data
file and doing some fuzzy logic scoring on the attributes (colls in a
data base/ csv file, eg. height weight income etc.) to determine the
most efficient 'type' to convert the attribute coll into for further
processing and efficient storage...
Example row from sampled file data: , ....]
| | |
by: cmdolcet69 |
last post by:
Can anyone give me some ideas on how to convert the following program
to vb 2003? I would like to jsut take this code and implement it in
vb.
def.h
/* Global Type Definitions */
typedef unsigned char byte; // 'byte' is an 8-bit
unsigned value
|
by: kotlakirankumar |
last post by:
please help me out the program for converting the integers to roman
numerals using files in the c language from 1-5000 range send the
program to my
mail id ::::::: kotlakirankumar@gmail.com
thank you all
|
by: rohit |
last post by:
Hi All,
I am new to C language.I want to read integers from a text file and
want to do some operation in the main program.To be more specific I
need to multiply each of these integers with another set of integers
stored in an array.It would be a great help if you could provide some
code for it.I tried the function fscanf but by that I am able to read
only the first integer of the text file.Please help me.
|
by: Paul McGuire |
last post by:
On Sep 2, 12:36 pm, hofer <bla...@dungeon.dewrote:
All that sed'ing, grep'ing and awk'ing, you might want to take a look
at pyparsing. Here is a pyparsing take on your posted problem:
from pyparsing import LineEnd, Word, nums, LineStart, OneOrMore,
restOfLine
test = """
|
by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
|
by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it.
First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
| | |
by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
|
by: tracyyun |
last post by:
Dear forum friends,
With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
|
by: agi2029 |
last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own....
Now, this would greatly impact the work of software developers. The idea...
|
by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules.
He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms.
Adolph will...
|
by: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
|
by: 6302768590 |
last post by:
Hai team
i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
| | |
by: bsmnconsultancy |
last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...
| |
