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When equations go wrong...

Started by ChemicalImbalance Dec 14, 2005 at 10:49 PM 13 replies 1.5k views

Original Post

Dec 14, 2005 at 10:49 PM

Sometimes when things don't work quite the way you want them to, they still end up looking kind of cool. On the image below, I was trying to generate a sun with realistic plasma. Instead it ended up looking like a balloon that's been popped.

Anyone else's bugs do things like this?

lethalhamster

Dec 14, 2005 at 11:05 PM

My bugs make the computer look as if it can't play Tic Tac Toe...

So the answer is no, none of my bugs look or are cool. [smile]

Programmer One

Dec 14, 2005 at 11:10 PM

This is what happens when my equations go wrong:

ChemicalImbalance

Dec 14, 2005 at 11:21 PM

Quote:
Original post by Programmer One
This is what happens when my equations go wrong:
{pictures}

Did you divide by zero?

smart_idiot

Dec 14, 2005 at 11:23 PM

Font rendering gone wrong:

Cypher19

Dec 14, 2005 at 11:24 PM

Quote:
Original post by Programmer One
This is what happens when my equations go wrong:
{pictures}

LMAO @ the last pic

skyfire

Dec 15, 2005 at 12:02 AM

Quote:
Original post by Programmer One
This is what happens when my equations go wrong:

seriously, this last picture made me laugh so hard snot was coming out of my nose.

necreia

Dec 15, 2005 at 12:03 AM

Quote:
Original post by Programmer One
This is what happens when my equations go wrong:

stuff

[lol]

ordered_disorder

Dec 15, 2005 at 12:09 AM

wow... That was really funny Programmer

njpaul

Dec 15, 2005 at 12:58 AM

I think Mathematica is a prime example of what can happen when equations cross over to the dark side. Mathematica takes perfectly good equations and garbles them up with asinine syntax, in my opinion. Glad I never have to use it again.

kSquared

Dec 15, 2005 at 3:33 AM

Quote:
Original post by njpaul
I think Mathematica is a prime example of what can happen when equations cross over to the dark side. Mathematica takes perfectly good equations and garbles them up with asinine syntax, in my opinion. Glad I never have to use it again.

Can you give an example? I'm curious as to which part of it you think is so horrendous.

njpaul

Dec 15, 2005 at 2:05 PM

I can't remember what this does because it was taken from homework 2 years ago. To me the syntax just seems horrible. If I remember, the _ had various effects on the variables in the equation, but I can't recall what. Maybe part of the reason I don't like it is because we had to use the Sun version of the program.

Clear[f, x, y, a, b, Sol, Slope, ySol]f[x_, y_]  =  x*Cos[x*y]  -  y  +  Cos[y];a = 1.2;b = 3.4;Sol  =      NDSolve[        {y'[x] == f[x, y[x]],         y[a] == b        },        y[x],        {x, -2, 4}]ySol[x_] = y[x] /. Sol[[1]];Sol = Plot[ySol[x], {x, -2, 4}]Slope = PlotVectorField[    {1, f[x, y]},    {x, -2, 4},    {y, 0, 80},    Frame -> True,    AspectRatio -> 2.5,    PlotPoints -> 30,    ColorFunction -> Hue];Show[    Slope,    Sol];

furby100

Dec 15, 2005 at 2:48 PM

That syntax does not even remotely resemble a donkey.

njpaul

Dec 15, 2005 at 3:00 PM

Guess it's just me and my HCI professor who think so then.

jollyjeffers

Dec 15, 2005 at 3:17 PM

I can't express mine as a picture

I think one of the worst ones I've done recently was playing with cubic patches and vertex shaders in Direct3D. I had a nice cubic patch animating on-screen, and changed something such that (I guess) I introduced a numerical instability.

So, from the camera angle I used, it animated a bit and then suddenly rushed straight in the direction of the camera in a big bulging mess. Scared the crap outta me [oh]

Jack

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