ofxLua

#42

I’ve updated ofxLua to use Semantic Versioning. There is now a changelog and ofxLua-specific version tags to replace the previous tags which were based on OF versions.

#43

@lewislepton and @yeswecan, y’all might be interested in loaf (lua, oscillator, and openFrameworks) which I just released today: http://www.danomatika.com/code/loaf

#44

ofxLua 1.3.0 (& 1.3.1 shortly after) is now out. See the changelog for details.

Main info:

1.3.0

  • updated for OF 0.10
  • build error and bug fixes
  • fleshed out documentation commenting

1.3.1

  • added glm library bindings
#45

Wow Dan, thanks again for your amazing work.

I have a small conversion issues with the last release with XCode

Line 42883 :
SWIG_fail_ptr(“Xml_getAttributes”,1,SWIGTYPE_p_ofXml);

#46

Hi Dan,

I’m trying to compile the luaExample on Linux.
I get many instances of these bugs:

/home/edward/software/of/of_v0.10.1_linux64gcc6_release/addons/ofxLua/src/bindings/desktop/ofBindings.cpp:5646:37: note: in expansion of macro ‘SWIG_contract_assert’
arg3 = (GLint)lua_tonumber(L, 3); SWIG_contract_assert((lua_tonumber(L,4)>=0),“number must not be negative”)

/home/edward/software/of/of_v0.10.1_linux64gcc6_release/addons/ofxLua/src/bindings/desktop/ofBindings.cpp:5647:38: note: …this statement, but the latter is misleadingly indented as if it is guarded by the ‘else’
arg4 = (GLenum)lua_tonumber(L, 4); (arg1)->createAndAttachDepthStencilTexture(arg2,arg3,arg4); return SWIG_arg;

/home/edward/software/of/of_v0.10.1_linux64gcc6_release/addons/ofxLua/src/bindings/desktop/ofBindings.cpp:5865:43: note: …this statement, but the latter is misleadingly indented as if it is guarded by the ‘if’
if (arg1) (arg1)->textureTarget = arg2; return SWIG_arg; if(0) SWIG_fail; fail: lua_error(L); return SWIG_arg; }

This all looks like issues with SWIG. I note you stated: “This branch is fully working and tested on OS X and iOS. It should work pretty easily on Win and Linux now that Boost isn’t required”

#47

i was able to make it work on linux, but you have to regenerate the bindings:

cd ofxLua
git submodule init
git submodule update
cd scripts
./generate_bindings.sh
#48

Thanks! It works.
Nwo I just have to find a way of using framebuffers that don’t crash, but that’s another topic…
Cheers

#49

UPDATE: rolling this back a bit for now. See next post.

ofxLua 1.4.3 is now out. See the changelog for details.

Since my last post here, versions 1.3.2 - 1.3.7 and 1.4.0 - 1.4.2 have also been released.

Main info:

  • OF 0.11 support (ofxLua 1.4.0)
  • OF 0.10.1 support (ofxLua 1.3.6)
  • updated to Lua 5.4.2 Lua 5.3.6
  • added basic Android support and info on how to build ofxLua with Android Studio
  • general bindings updates
#50

Whoops, I noticed a few issues and am rolling back the ofxLua 1.4.3 release for now to address them. The Lua version will also now be 5.3.6 instead of 5.4.2.

#51

Ok, now ofxLua 1.4.3 is out. See the changelog for details.

Main info:

  • OF 0.11 support (ofxLua 1.4.0)
  • OF 0.10.1 support (ofxLua 1.3.6)
  • updated to Lua 5.3.6
  • added basic Android support and info on how to build ofxLua with Android Studio
  • added info about building Lua modules, module.mk helper script, and example
  • general bindings updates

Happy Holidays!

1 Like
#52

Hello!

Does anyone have a basic example of doing a shader in ofxLua?

(i’m not quite getting the hang of it so far)

#53

Hi,
Haven’t done this myself, but saw this post / example which has a simple shader implementation:

#54

does not look like it’s using ofxLua tho… but maybe it’ll give me some ideas. :slight_smile:

#55

Ah, now I see. I thought I recognized Lua, and therefore ofxLua, which isn’t the case :wink:

1 Like
#56

Shaders should work fine. The main difference is that the ofShader begin() and end() member functions are renamed to beginShader() and endShader() as end is a reserved Lua keyword.

As noted in the (basic) wrapper overview in the ofxLua readme, this is also true for other classes which use begin() and end() such as ofFbo.

UDPATE: You can see a full listing of the Lua of module functions and variables generated for my loaf (Lua Osc And openFrameworks) interpreter: https://github.com/danomatika/loaf/blob/master/doc/modules/of_syntax.txt

1 Like
#57

Right right.

I was kinda confused because the various shader examples I was finding were including the shader as a separate file.

Gonna save that function list for perusing later :slight_smile:

#58

Well, you still need the shader as separate files written in GLSL.

1 Like
#59

Can those be included from the local lua filepath (if it’s different from the oF app filepath)?

Have a use-case where the user is just interacting with the lua files and the oF app and its data are in a separate location - so creating a lua script that depends on a shader can get confusing for install process

#60

When loading a script, you can change the working directory: https://github.com/danomatika/ofxLua#lua-require

It basically calls chdir() for you but leaves the ofDataPath alone.

#61

In that case, load resources from the main data path first or save the datapath & append it manually later.

Then for script resources, change the datapath before loading the script. Calling chdir() is really only needed for Lua to find other Lua scripts or libs.

1 Like