About archiving a file

Rhino Developer
1

hi everyone
i am try to save a archive in one step without enter a dialog.
i try the " Archiving Curves to a File" on web but its not create a new file and fail

2

i use SDK c++ this is my code

CRhinoGetObject go;
		go.SetCommandPrompt(L"Select curve ");
		go.SetGeometryFilter(CRhinoGetObject::curve_object);
		go.GetObjects(1, 1);
		if (go.CommandResult() != success)
		return go.CommandResult();
		const ON_Curve* curve = go.Object(0).Curve();
		if (0 == curve)
			return failure;

		bool rc = false;
			const wchar_t  * filename = L"Rwrite.jpg";
			//const wchar_t  * filemode = L"wb";

		FILE* fp = ON::OpenFile(filename, L"w");
		if (fp)
		{
			rc = WriteCurveFile(fp, curve);
			ON::CloseFile(fp);
		}

		if (rc)
			RhinoApp().Print(L"Successfully wrote %s.\n", filename);
		else
			RhinoApp().Print(L"Errors while writing %s.\n", filename);
		
	return success;

this code is on web and that can build a command but always stop at " FILE* fp = ON::OpenFile(filename, L"w");" this line.

3

You should specify the full file name, including the directory. Otherwise, it tries to write into the working directory which is the install directory of Rhino. Usually, this is C:\Program Files\Rhino 6\System and that is write protected, so opening the file there will lead to failure.

4

Hi @tll4568523,

Here a working sample you can try:

cmdSampleWriteCurve.cpp

– Dale

5

@menno @dale thank you both very much. it’s helpful.
Have a good day.

6

Hi and excuse me. For the same topic
After i creating a picture file(maybe a .jpg file)
How can i put my object at rhino into there.
i do not find the code to change a curve or other thing into a picture.

The second question is that is there the c++ code can’t be used in rhino function?
Like we have to use “ON::OpenFile” instead of “fopen”

7

Hi I don’t understand the first question. Do you want to use your jpg file as a background image with you Rhino object in the foreground?
On the second if I understand correctly you are asking whether you can mix Rhinoscript with cpp. I don’t think this is possible : you have lots of different scripting languages available but you can’t mix them except for calling rhino commands from the other languages.

8

to @Dancergraham ,yes,but the jpg file doesn’t have anything before this work. In easy way to say is that I want to save my Rhino painting to a jpg file just in only one command without enter the dialog which is appear as we take the “Save” features.So i trying to create a empty file and throw something in. but now I don’t know what’s the code I needed to transform objects or the format my objects in painting need to transform to.

And thanks a lot for the second answer!

9

So you are trying to save a screenshot?

10

Yes, it’s my direction and if it can save only the object which i selected that will be better.
The background will be complex, include coordinate、gray_mesh background.etc,if save the screenshot. But now I even can not save the screenshot. lol…

11

Hi @tll4568523,

Keep in mind that the sample I provided (above) does not write (nor read) a Rhino 3dm file. Rather, it simply demonstrates how to write some geometry (a curve in this case) to a binary file.

If all you want to to is write a a bitmap to this binary file, in addition to a curve, then I suggest looking at the ON_WindowsBitmap class, as it can serialized just like an ON_Curve. In Rhino, you can use the CRhinoDib helper class to assist in creating bitmaps.

If you are trying to save a thumbnail image, something that you can view from Explorer, then that is a much different issue.

– Dale

12

To @dale
Ok,I will look for given information to try.thanks a lot!