Don't have an account? Register now to chat, post, use our tools, and much more.
Latest Headlines
Online Users
There are 108 users online: 4 members, 72 guests and 32 bots.
Members: Ashbad, iconmaster, rfdave.
Bots: VoilaBot (2), Spinn3r (1), MSN/Bing (1), Magpie Crawler (3), VoilaBot (5), Googlebot (19), MSN/Bing (1).
RSS & Social Media
SAX
You must log in to view the SAX chat widget
|
| Author |
Message |
|
Eiyeron
Member
Joined: 12 Dec 2011
Posts: 158
|
 Posted: 02 Apr 2012 10:57:01 am Post subject: |
 |
|
Using TWO trig functions will make SYSTEM Error
And color will work until Xstep or Ystep are above 100, then it's just color glich
_________________
  |
|
| Back to top |
|
|
KermMartian
Site Admin
Joined: 14 Mar 2005
Posts: 55762
Location: Earth, Sol, Milky Way
|
| Posted: 02 Apr 2012 10:58:44 am Post subject: |
|
|
| Eiyeron wrote: | Using TWO trig functions will make SYSTEM Error
And color will work until Xstep or Ystep are above 100, then it's just color glich |
I don't think it's two trig functions specifically, just that my parentheses counting is off. Assuming that my PhD Qual oral exam today goes smoothly (I'm super-duper nervous about it at the moment), I'll look into repairing the parser later this evening. And that's interesting to hear about the Xsteps/Ysteps; I wouldn't expect that to happen unless malloc is doing something odd, but I swear that I check for that.
_________________
 
 
 |
|
| Back to top |
|
|
Eiyeron
Member
Joined: 12 Dec 2011
Posts: 158
|
| Posted: 02 Apr 2012 10:59:48 am Post subject: |
|
|
cos*sin => crash
Cos/sin => crash
cos + sin => crash...
_________________
|
|
| Back to top |
|
|
KermMartian
Site Admin
Joined: 14 Mar 2005
Posts: 55762
Location: Earth, Sol, Milky Way
|
| Posted: 02 Apr 2012 11:01:48 am Post subject: |
|
|
| Eiyeron wrote: | cos*sin => crash
Cos/sin => crash
cos + sin => crash... |
cos(sin()) -> No crash, I believe.  It's not the trig functions themselves, though, trust me on that. It's that I didn't quite fully understand how gCAS2's parse tree assembler worked, and the way that I hacked functions onto operators isn't quite right.
_________________
|
|
| Back to top |
|
|
merthsoft
File Archiver
Joined: 09 May 2010
Posts: 2735
|
| Posted: 02 Apr 2012 11:24:10 am Post subject: |
|
|
| AHelper wrote: | I see you ignored the labels on the casio and used the TI z80 layout  |
Kerm seems to be in the "make it like a TI" camp (see also Tetris, where he uses the 2nd key). I try to stick to the Casio way of doing it (my games all use the F-keys).
_________________
Shaun |
|
| Back to top |
|
|
KermMartian
Site Admin
Joined: 14 Mar 2005
Posts: 55762
Location: Earth, Sol, Milky Way
|
| Posted: 02 Apr 2012 11:24:51 am Post subject: |
|
|
| merthsoft wrote: | | AHelper wrote: | | I see you ignored the labels on the casio and used the TI z80 layout |
Kerm seems to be in the "make it like a TI" camp (see also Tetris, where he uses the 2nd key). I try to stick to the Casio way of doing it (my games all use the F-keys). |
I use the Function keys entirely here. What exactly am I doing that's TI-style?
_________________
|
|
| Back to top |
|
|
merthsoft
File Archiver
Joined: 09 May 2010
Posts: 2735
|
| Posted: 02 Apr 2012 11:26:58 am Post subject: |
|
|
| KermMartian wrote: | | merthsoft wrote: | | AHelper wrote: | | I see you ignored the labels on the casio and used the TI z80 layout |
Kerm seems to be in the "make it like a TI" camp (see also Tetris, where he uses the 2nd key). I try to stick to the Casio way of doing it (my games all use the F-keys). |
I use the Function keys entirely here. What exactly am I doing that's TI-style? |
| AHelper wrote: | | I see you ignored the labels on the casio and used the TI z80 layout |
It's certainly not a problem or anything. Just two ways of approaching it.
_________________
Shaun |
|
| Back to top |
|
|
KermMartian
Site Admin
Joined: 14 Mar 2005
Posts: 55762
Location: Earth, Sol, Milky Way
|
| Posted: 02 Apr 2012 11:28:51 am Post subject: |
|
|
Yes, I saw what he said, but I thought he was joking, since the Prizm labels are "Trace", "Zoom", "Window", "Sketch", "G-Solve", and "G-T", only half of which are relevant to Graph3DP. It doesn't make sense to me to have Trace, Zoom, Window, Z=, Info, Graph, as I would expect the first screen that any application puts me in to be the leftmost of its tabs.
Edit: Ah, ok, as long as it's not a problem. I just did it the way that I expected users would be most familiar with and would find most intuitive.
_________________
|
|
| Back to top |
|
|
flyingfisch
Super-Expert
Joined: 02 Feb 2012
Posts: 896
Location: Akron, OH
|
| Posted: 02 Apr 2012 11:32:48 am Post subject: |
|
|
| KermMartian wrote: | Yes, I saw what he said, but I thought he was joking, since the Prizm labels are "Trace", "Zoom", "Window", "Sketch", "G-Solve", and "G-T", only half of which are relevant to Graph3DP. It doesn't make sense to me to have Trace, Zoom, Window, Z=, Info, Graph, as I would expect the first screen that any application puts me in to be the leftmost of its tabs.
Edit: Ah, ok, as long as it's not a problem. I just did it the way that I expected users would be most familiar with and would find most intuitive. |
The graph menu itself looks kind of ti-ish (block cursor, not as wide as the screen)
Also, when graphing to graphs at once, why not make one graph all one color and the other all another? (If that's already what you are doing, ignore me  )
_________________
 
  
 |
|
| Back to top |
|
|
KermMartian
Site Admin
Joined: 14 Mar 2005
Posts: 55762
Location: Earth, Sol, Milky Way
|
| Posted: 02 Apr 2012 11:34:20 am Post subject: |
|
|
Currently I'm putting them both into the Z-linked color scheme. I am going to be offering three color schemes eventually: the current system, some kind of white-to-aqua/black-to-aqua height-based system, and a third system where each graph is a single uniform color, as you propose.
_________________
|
|
| Back to top |
|
|
flyingfisch
Super-Expert
Joined: 02 Feb 2012
Posts: 896
Location: Akron, OH
|
| Posted: 02 Apr 2012 11:37:23 am Post subject: |
|
|
| KermMartian wrote: | | Currently I'm putting them both into the Z-linked color scheme. I am going to be offering three color schemes eventually: the current system, some kind of white-to-aqua/black-to-aqua height-based system, and a third system where each graph is a single uniform color, as you propose. |
In the finished product, will it remember what settings you chose? (black or white background, namely - I love the black background)
Also, instead of making f1 bring the trace, z=, etc. menu up, why not use shift like casio does? (or both)
_________________
|
|
| Back to top |
|
|
KermMartian
Site Admin
Joined: 14 Mar 2005
Posts: 55762
Location: Earth, Sol, Milky Way
|
| Posted: 02 Apr 2012 11:38:49 am Post subject: |
|
|
Oh yes, and I also need to add an icon on the graph screen so that people know [F6] changes the background color and [F5] changes the graph color. Yes, I hope to make it both remember the settings you choose (colors, equations, and windows) in a file and be able to load them back.
_________________
|
|
| Back to top |
|
|
elfprince13
OVER NINE THOUSAND!
Joined: 23 May 2005
Posts: 10234
Location: A galaxy far far away......
|
|
| Back to top |
|
|
KermMartian
Site Admin
Joined: 14 Mar 2005
Posts: 55762
Location: Earth, Sol, Milky Way
|
| Posted: 02 Apr 2012 12:07:47 pm Post subject: |
|
|
I hadn't really considered the possibility of supporting parametrized functions, because it would be fairly challenging, at least for Graph3D v1.0. For a future version, I think it would be a good feature to add, especially if one could use it to graph snowmen!
_________________
|
|
| Back to top |
|
|
elfprince13
OVER NINE THOUSAND!
Joined: 23 May 2005
Posts: 10234
Location: A galaxy far far away......
|
| Posted: 02 Apr 2012 12:52:51 pm Post subject: |
|
|
| KermMartian wrote: | | I hadn't really considered the possibility of supporting parametrized functions, because it would be fairly challenging, at least for Graph3D v1.0. For a future version, I think it would be a good feature to add, especially if one could use it to graph snowmen! |
I have some really sweet (procedural/mathematical surface) visualizations in Maple that would be mind-blowing on a hand-held :D Even if I had to calculate the Frenet-Serret frame equations for my spacecurves by hand or not have reusable user-defined convenience functions, being able to use parameterized and/or implicit plots would be amazing. From a computational perspective, I don't think you're missing anything I used in the Maple spreadsheet I used to make the snowman (except for the Frenet-Serret calculations at the beginning). I've transcribed it here, sans the coloring/lighting/window options. Take a look and tell me if you think I'm wrong (as far as capabilities are concerned), but I could see this as a worthy end-goal for your program.
| Quote: | > hatpath := t -> <2*t, 0, -(t-1)^2+1>:
> spacecurve(hatpath(t), t = -1 .. 4):
> TNB := TNBFrame(hatpath(t)):
> T := u -> subs(t = u, TNB[1]): N := u -> subs(t = u, TNB[2]): B := u -> subs(t = u, TNB[3]):
Because poofy hats are styling
> pompombumps := (θ, φ) -> 1+(3/32)*sin(16*θ)*sin(16*φ):
> hatfabric := (s,t) -> 4*cos(s)*N(t)+2*sin(s)*B(t):
Christmas-ish red and green lighting from light2
> mainhatplot := plot3d(hatpath(t)+hatfabric(s, t)*exp(.4*(-1-t)), t = -1 .. 4, s = 0 .. 2*π):
We'll re-use this bit a lot. save it as a convenience function
> ball := (ρ, θ, φ) -> <ρ*sin(φ)*cos(θ), ρ*sin(φ)*sin(θ), ρ*cos(φ)>:
> poofplot := plot3d(hatpath(4)+ball(pompombumps(θ, φ), θ, φ), θ = 0 .. 2*π, φ = 0 .. π):
> poofband := (q, r, s, t, u) -> hatfabric(s, t)+pompombumps(s, u)*(q*cos(u)*cos(s)*N(t)+q*cos(u)*sin(s)*B(t)+r*sin(u)*T(t)):
> bandplot := plot3d(hatpath(-1)+poofband(.5, 1, s, -1, u), s = 0 .. 2*π, u = 0 .. 2*π):
Making some snowballs
> snowman := seq(plot3d(ball(4+2*n, θ, φ)-<4, 0, 2+sum(2*((i+.5)*2), i = 1 .. n)>, θ = 0 .. 2*π, φ = 0 .. π), n = 1 .. 3):
Makes a segmented carrot by scaling the top end of the original segment down towards the tip.
> carrotsegment := (o, r, l, t, s) -> {<-7-o, 0, -7>+<r*t, sqrt(r^2-r^2*t^2)*cos(s), sqrt(r^2-r^2*t^2)*sin(s)>, <-7-o, 0, -7>+<-l*t, (r-r*t)*cos(s), (r-r*t)*sin(s)>}:
> carrot := seq(plot3d(carrotsegment(i, e^(-0.5e-1*i), 7-i, t, s), s = 0 .. 2*π, t = 0 .. 1), i = 0 .. 4);
Another convenience function. Eyes, mouth, buttons
> coal := (θ, φ) -> ball(.75, θ, φ):
> eyes := seq(plot3d(coal(θ, φ)+<-7, -3+6*n, -4.5>, θ = 0 .. 2*π, φ = 0 .. π), n = 0 .. 1):
Magic constants based on the snowball formulation above. This uses a spherical coordinate transform, with the ordered triplet rotated one position to the right so that "vertical" is along the x axis. This allows us to base the mouth curve on a single variable, rather than 2
> mouthsphere := (n, θ, φ) -> <6*cos((7/8)*π)-4, 6*sin((7/8)*π)*cos((9/8)*π+(3/16)*n*π), 6*sin((7/8)*π)*sin((9/8)*π+(3/16)*n*π)-8>+coal(θ, φ):
> mouthplot := seq(plot3d(mouthsphere(n, θ, φ), θ = 0 .. 2*π, φ = 0 .. π), n = 0 .. 4):
See above, only we can get away with just using normal spherical coordinates here, since the buttons only rotate along φ.
> button := (n, θ, φ) -> ball(8, π, (3/8)*π+(1/8)*n*π)-<4, 0, 18>+coal(θ, φ):
> buttons := seq(plot3d(button(n, θ, φ), θ = 0 .. 2*π, φ = 0 .. π), n = 0 .. 2):
> armpath := t -> <-3, t, abs(.25*t)-18>:
Taper the arms so they don't appear open at the end (even though they really are)
> armplot := plot3d(armpath(t)+<e^(-.1*abs(t))*cos(s), 0, e^(-.1*abs(t))*sin(s)>, s = 0 .. 2*π, t = -15 .. 15):
> display({armplot, buttons, carrot, eyes, snowman, bandplot, mainhatplot, mouthplot, poofplot});
|
Similarly, for this shell: http://img821.imageshack.us/img821/4992/shellrender.png
_________________
StickFigure Graphic Productions || VSHI: Vermont Sustainable Heating Initiative
 
 |
|
| Back to top |
|
|
Deep Thought
Expert
Joined: 11 Mar 2010
Posts: 739
Location: The Universe
|
| Posted: 04 Apr 2012 07:33:21 pm Post subject: |
|
|
I tried it today, and I love it, though I wish there were some way to rotate around that other axis in the graph...
_________________
  |
|
| Back to top |
|
|
KermMartian
Site Admin
Joined: 14 Mar 2005
Posts: 55762
Location: Earth, Sol, Milky Way
|
| Posted: 04 Apr 2012 10:57:20 pm Post subject: |
|
|
| Deep Thought wrote: | | I tried it today, and I love it, though I wish there were some way to rotate around that other axis in the graph... |
Yeah, that's the whole "dynamic axis" thing that I need to do. I want it to always rotate about a pair of virtual axes that are in-out of the screen in the horizontal and vertical directions.
_________________
|
|
| Back to top |
|
|
zeldaking
Power User
Joined: 31 Jul 2011
Posts: 470
Location: Utah
|
| Posted: 04 Apr 2012 11:33:52 pm Post subject: |
|
|
| Great job Kerm. This is already better than the best ti-84 3d grapher; as this has color, multiple equations and is on the Prizm. Keep up the good work. |
|
| Back to top |
|
|
KermMartian
Site Admin
Joined: 14 Mar 2005
Posts: 55762
Location: Earth, Sol, Milky Way
|
| Posted: 04 Apr 2012 11:36:02 pm Post subject: |
|
|
| zeldaking wrote: | | Great job Kerm. This is already better than the best ti-84 3d grapher; as this has color, multiple equations and is on the Prizm. Keep up the good work. |
Thanks very much, Zelda. I look forward to continuing to improve it.
_________________
|
|
| Back to top |
|
|
Ashbad
... I think redheaded girls are kind of cool
Joined: 01 Dec 2010
Posts: 2418
Location: Stomp Stomp Stomp, The Idiot Convention
|
| Posted: 20 Apr 2012 05:52:06 pm Post subject: |
|
|
One thing I noticed, that probably needs to be fixed by the next version: Open Graph3D, press the [WINDOW] option, which IIRC is F2. Set XSteps or YSteps (or both!) to a high number, something along the lines of 500. Either when you press EXE to confirm the new [X|Y]Steps value(s), or when you next draw a graph, crashes galore. System memory error. I assume that you're allocating memory, or just pushing and array of vertexes of the graph onto the stack, and with such a high number of steps, I also assume you're filling memory and then some with them, causing the memory error.
If you want, I can test around later to find the safest, highest number of steps that don't cause a crash (on the current version), and report them here, so you can add a catch if any higher numbers are entered and say something along the lines of "TOO HIGH A NUMBER FOR FIELD".
_________________
-Ashbad |
|
| Back to top |
|
|
|
Register to Join the Conversation
Have your own thoughts to add to this or any other topic? Want to ask a question, offer a suggestion, share your own programs and projects, upload a file to the file archives, get help with calculator and computer programming, or simply chat with like-minded coders and tech and calculator enthusiasts via the site-wide AJAX SAX widget? Registration for a free Cemetech account only takes a minute.
» Go to Registration page
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
|
© Copyright 2000-2013 Cemetech & Kerm Martian :: Page Execution Time: 0.049894 seconds.
|
![[t]](/forum/templates/Cemetech6/images/twitter.png)
![[t]](/forum/templates/Cemetech6/images/fb.png)
![[RSS]](/forum/templates/Cemetech6/images/rss.png)
