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Connector

I still did not get an answer to my question so i try to edit my original post for better understanding and reproducing my Problem to hopefully some hints to my issue:

I am writing an jitter external for Max 9.0.8 with max-sdk-8.2.0:

max.testexternal.c.txt

testexternal.c.txt

Inside the external i am filling a 2x2x3 matrix and storing the matrix to brightnessTest.jxf in the Filesystem. After reading back into a matrix object i want to get the stored Values back in a jitter Patch. 

Testexternal.maxpat

 While storing the values to the matrix with this code: 

for (x->currentframe = 0; x->currentframe < 3; x->currentframe++) {
    for (i = 0; i < x->nrOfCells; i++) {
        yCellPos = i / x->cols;
        xCellPos = i % x->cols;

        brightness = 25. * i;
        post("i: %ld", i);
        post("x->currentframe: %ld, xPos: %ld, yPos: %ld", x->currentframe, xCellPos, yCellPos);
        post("brightness: %f", brightness);

        brightnessp = brightness_bp  
            + xCellPos * sizeof(float) 
            + yCellPos * sizeof(float) * (&brightness_minfo)->dim[0]
            + x->currentframe * sizeof(float) * (&brightness_minfo)->dim[0] * (&brightness_minfo)->dim[1];
        *brightnessp = brightness;

    }
}

The output to console looks fine (frames 0,1,2 are filled with values):

But when i try to read back the matrix values in the patch

it seems that only the first frame (frames 0) was read back correctly. At the second frame (frames 1) i only get 0. Values and the third frame (frames 2) i get no Values.

Hope anyone could give me a hint to solve my problem. 

I still did not get an answer to my question so i try to edit my original post for better understanding and reproducing my Problem to...

problem-with-writing-a-matrix-to-jxf-file-and-reading-it-back-to-jitter

Problem with writing a matrix to jxf File and reading it back to Jitter

Joe Kaplan

I'm playing around with the default colors of my custom UI object made in Min Devkit.  The shift from light background to dark background in the default theme from Max 8 to Max 9 makes my object look terrible by default in Max 9.

I recently added attributes to customize the colors of various elements in my UI Object.

But I noticed in [attrui] that various theme colors are available.  Is there a way to access these theme colors from the External Code?

So I can set the default color of my text to the theme's "Object Text Color"?  Then my object will be responsive to the theme and I won't have to commit to a Max 8 or a Max 9 color scheme.

using-theme-colors-in-custom-externals

Using Theme Colors in Custom Externals?

If you've worked with Min Devkit enough to recognize how awesome it is, you might also have run into a few of its limitations when working with Max's more advanced features such as dictionaries, notifications, UI objects, etc.

Min Devkit is a wrapper around Max SDK, and in fact, the entire Max SDK Base is included in the min-api folder.  Mixing and matching Min Devkit and Max SDK takes some care.  There are also  a few essential, undocumented, setup components that need to be addressed before you're able to do anything substantial here.  The notes below are assembled from my learnings across several threads in this forum.  Thanks especially to 11OLSEN and Rob Ramirez for all the support.

Two Methods for Using Max SDK in Min Devkit Projects

1)  Call Max SDK Functions in Min Devkit Source Code

If you want to use a feature of the Max SDK that isn't fully implement in Min, you can call any Max SDK function by prefixing it with c74::max.  For example: c74::max::object_notify().

Follow these suggestions and you should be able to leverage most of the Max features supported by MaxSDK inside MinDevkit.

2)  Create a Max SDK Object in a Min Devkit Solution

Sometimes calling a few Max SDK functions inside a Min object is not sufficient.  Min's support for UI Objects is either incomplete, incompletely documented, or both.  You might run into something that can be done in Max SDK that is very difficult to achieve in Min (textfields  are a good example).   In this case it can be easier just to build a Min SDK object and include it  in your MinDevkit package.

There are probably a few ways to do this. Below is my preferred solution:

1) Create a new Min Object the way you normally would.

2) Delete the contents of the source file.

3) Replace the contents of the source file with well-formed Max SDK source code.  Ideally, paste in an entire example from the Max-SDK.

4)  Somewhere early in the ext_main function you will find the line where class_new() creates the class.

In the simplemax example from Max SDK it looks like this:

c = class_new("simplemax", (method)simplemax_new, (method)simplemax_free,  ....

The first argument, the string in quotes, needs to match the name of your file.  So if your source file is "MyNewObject.cpp" then the first argument of class_new() should be "MyNewObject". eg:

c = class_new("MyNewObject", (method)simplemax_new, (method)simplemax_free,  ...

You can replace the name of your template (in this case, simplemax) throughout the code, but the only one that matter is the first argument of class_new().  If you don't do this, your object will appear red in Max and there will be no indicator as to why.

5)  You could stop here, but it's possible to go a step further.  Delete all the includes from the top of the file.  Replace them with: 

Now we are literally running Max SDK inside of Min.  We could even call Min functions inside it using the  c74::min:: prefix.  (Very cool in theory, use in practice at your own risk)

Most importantly, the new Max SDK object is running entirely on modern C++ which means you get access to the C++ standard libraries and any third party C++ libs you want to use.

The same concern about common symbols applies.  Be sure to include 

 in your cmakelists.txt as described above.

. Include this as well using the same method.

Your cmakelists.txt for a Min object that uses Max SDK to create a UI Object should have the following:

	${MAX_SDK_INCLUDES}/common/jpatcher_syms.c

Armed with this, you should be able achieve anything Max SDK is capable of inside a Min Devkit Package.

I hope this is helpful to someone.  I offer it as gratitude to the folks who helped me figure this stuff out.

Hi all,

If you've worked with Min Devkit enough to recognize how awesome it is, you might also have run into a few of its limitations when...

using-max-sdk-in-min-devkit-projects-a-how-to-guide

Using Max SDK in MIN Devkit Projects:  A How To Guide

// the "maxclass_setup" method is called when the class is created
// it is not called on an instance at what we think of in Max as "runtime"
message<> maxclass_setup { this, "maxclass_setup", 
    MIN_FUNCTION {
		c74::max::t_class* c = args[0];

		CLASS_ATTR_ENUM(c,	"shape", 0, "linear equal_power square_root");
		CLASS_ATTR_LABEL(c,	"shape", 0, "Shape of the crossfade function");

		return {};
	}
};

But when I do that, the linter gives an error gensym is unidentified.  I tried expanding the macro and putting c74::max in front of all the max terms.  But this causes a "read access violation" hard crash when the object loads.  Is there any 

Greetings,

i'm trying to get this example from the Min documentation to run:


// the "maxclass_setup" method is called when the class is...

min-devkit-unable-to-call-max-macros-in-maxclasssetup

Min Devkit: Unable to call Max Macros in Maxclass_setup

I've built an external with MinDevkit on Windows using visual studio.  Everything is working the way I like.  I'd like to support MacOS as well, and I'm running into some challenges.

One thing I need to do is write and read a local file in order to persist some settings.  My code contains

On windows this works fine.  It creates the file in the same folder as the external.

However on Mac, i get the "could not open file" error.   I did some searching and one thing that was suggested was that maybe i didn't have write access to the working path.

On windows I get back the path to my external, as expected.

I suspect this is a clue to why I'm not able to write my file.  But I'm not clear on the best way to fix it.  Does anyone have any experience developing externals for Mac and have any advice on this one?  Thanks!

Hi all,

I've built an external with MinDevkit on Windows using visual studio.  Everything is working the way I like.  I'd like to support...

sdk-development-working-path-on-macos

SDK Development: Working Path on MacOS?

I have a UI object with some attributes to control colors of text and various other things that the object paints.  

Something I'm noticing is that updating the attribute doesn't immediately trigger redraw().  So I don't get the common Max experience of dragging the color swatch around and watching the object change in real time.  

If I update the attribute and then do something in the object that would ordinarily trigger a redraw() then the new colors appear.  But that's not how Max objects typically behave.

Is there a way to get my UI objects to redraw() when an attribute gets updated?

Dev Forum