12,076,669 members (46,087 online)
Rate this:
See more:
I want to convert a string of formula (such as a/b+c* sqrt d)to an image
Like what the following webpage does.

http://www.wolframalpha.com/input/?i=3%2F2%2B%285*%286%2F%284%2F%283%2F%282%2F1%29%29%29%29%29%2F4[^]

somebody provide an example or sth? thanks

(Is this a clear description?why no replys???)
Posted 12-Aug-12 4:15am
Edited 12-Aug-12 4:53am
v2

So create a bitmap and draw the text on it. What are you having trouble with?
ChineseGuy 12-Aug-12 9:58am

there are many factors to consider which makes me confused about draw from where
And the size of the number，sqrt，Fractional line depends how many numbers or something else are included................

Rate this:

## Solution 1

Converting anything in this way requires a little thinking in advance. You need to analyse the information you are converting and figure out how high and wide it might be. For example, showing a division operation such as:
```    23
a = --
10
```
requires first, two 'lines', each of which needs to be high enough to contain characters in the selected font. Secondly a 'line' high enough to contain a separator. The start of the expression "a = " should be positioned centred on the dividing line. The actual calculations would be based on the size of the image you wish to display and the size of the font being used for the characters, so assuming a font 10 px high by 8 px wide we would have something like:
```moveto(32, 0) // position X, Y
write("23")
moveto(0, 6)
write("a = ")
moveto(32, 12)
lineto(48, 12)
moveto(32, 14)
write("10")
```
v2

Top Experts
Last 24hrsThis month
 Richard MacCutchan 420 Sergey Alexandrovich Kryukov 360 Jochen Arndt 350 OriginalGriff 305 F-ES Sitecore 225
 Dave Kreskowiak 2,836 OriginalGriff 2,805 Richard MacCutchan 2,174 CPallini 1,607 CHill60 1,379