DPlot

Thanks david,

i'll go that route.

jerry

Hi,

i am stuck and wonder if you can help.

i am using Jr to draw a plot in a picture box using your sample code in VB6. i get exactly the plot i want. now i want to save that as a bitmap file a ...

Maybe I finally get it, sometimes i need things to be painfully obvious,
Embarassed

I'll play around with this some more and see what happens, i'l try using the metrics to scale and see of the resul ...

Ok, i posted that so you could read what some of my thinking has been.

so if i use the hll, vll etc, to determine the pixel locations of the corners of the plot then is there a way to get the x an ...

Keep in mind that those are the pixel values of the corners of the plot, though - not the extents of the entire plot. So this still may not be quite what you have in mind.

i don't know what you m ...

i don't see the problem, here is the code i'm using:

' try to get the metrics without drawing the plot
If (hBitmap <> 0) Then
ret = DeleteObject(hBitmap) ...

LOL,

i had a hunch it was something like that!

now i have an idea where to look in the code. i used the DPM to get the corners of the plot and then use the distance between the corners to size t ...

David,

i have gotten the following:

Error in CreateCompatibleBitmap=0x00000008, Size 802x616744

i suspect there is a size issue, can you fill me in on the error and any limitations that i ne ...

David,

as you can imagine i have been reading the DPlotJr help file alot the last few days Laughing

and i notice a bug of sorts: when you open the help file the window is taller than the viewable ...

David,

i started to type another question:

This is so frustrating, every time i think its working and move on a new glitch comes in!

i'm sure you don't have that happen though.....

OK ...

OK, David,

now that's the ticket. i've got what i need, i just need to check the pixels per inch of the picturebox on the form load event and then i can size the plot accordingly once the file to ...

On a quick glance i think i see how this works.

I will try it out after lunch, if i can get (wx,wy) in this way then i'm home free and i only need to scale the bitmap large enough to give at least ...

OK,

i'll take a look at that, i think you understand just what i'm trying to do.

thanks
jerry

I found this which may lead to a solution:

Return the number of twips per pixel for an object measured horizontally (TwipsPerPixelX) or vertically (TwipsPerPixelY).

Syntax

object.TwipsPerPixe ...

"strange VB gizmo"

that made me laugh, but twips do come into play, possibly.

here is what i am working on, i have been playing with it this morning,

if i plot using twips, which should equ ...

David,

can you tell me the number of pixels per inch that a bitmap is created with when i use DPlot_GetBitmapEx ?

i think i have my scaling problem solved once i know that.

thanks
jerry

OH YEAH!!!!

I finally got it,

well OK: YOU finally got it for me, now lets see if i can get the rest of this thing done this week.

Thanks again,
Jerry

David,

thanks a bunch, i got 1. and 2. squared away.

3 however, hmmmm....

i can turn off the axes in DplotJr using the menu, i could not find an equivalent command to do the same, does one e ...

Thanks David that did it.

I now have the plot down to almost exactly what i need. i have three more changes to make, or figure out how to work around.

can I:

1. change all of the colors o ...

after all of that, i think i found the problem, i need to delete docMaximize() from the cmds string don't I?

cheers
jerry

David,

i'm back at it agian, and now i am using your exapmle from btest2 to draw a plot into a form. i simply imported your example into my code and remmed my code, now i get the bitmap in the pic ...

Thanks David,

I should be able to keep moving now.

i really appreciate your continued help on this project, though it is going slow being just a hobby i'm glad to be getting close.

cheers ...

David,

i solved part of the problem of finding the coordinates of the black pixels, but that brings up a new question. since my data needs to be interpreted in sequence by the device, i.e. it is r ...

great,

i'll have to do some experimenting with sizes to find just the right size to give me 1 meter between pixels.

thanks
jerry

Jerry,
To get the same size 2D plot every time, regardless of whether there's a title or axis labels or not, use

wow, that's cool. if i make the plot larger that will give me more bits and theref ...

hi david,

i'm still plugging away at my project! i promise to send you a copy to try out, really. you may recall that i am working with GPS/Sonar data and making bathymetric charts with the goal o ...

thanks for the reply david,

the file size will no longer be a worry to me, though 6 million data points are not out of reality for me either!

as to repeated data: that's interesting that it ...

David,

don't know if you recall, but i am working with GPS/Sonar data to make contour plot for lake bottoms. you helped me with my app last fall and now all is working well and i am ready to go to ...