On 14 May 2013 00:45, Igor Stasenko <siguctua@gmail.com> wrote:
On 9 May 2013 00:04, kilon <thekilon@yahoo.co.uk> wrote:
Ok so I tried to learn Opengl ES 2 (and opengl 4) during my eastern vacations because I realised
that I dont really need Athens or vector graphics for my GUI , since I will be dealing mostly with 3d graphics anyway. (My project "ephestos" will be an effort of creating a 3d app for pharo, see also "blender")
well, Athens provides convenient API for 2d vector graphics, which not exists in opengl .. One day i want to begin implementing opengl backend for Athens.
So when I tried to run the demos i get an error with
NBMacGLContextDriver>>supportsCurrentPlatform "obviously, for Mac intel-32 only :)" ^ NativeBoost platformId = NativeBoostConstants mac32PlaformId
My mac is "obviously" not 32-bit but 64 bit, but I dont know if that matters since pharo is only 32 bit anyway. The bug is also obvious it should be mac32PlatformId and not mac32PlaformId.
I correct and proceed and gives me a new error this time in
NBMacGlApi>>glApiCall: fnSpec index: fnIndex attributes: attributes context: contextToRetry
^[ (NBCallFailureHandler for: contextToRetry) retryWith: [ :targetClass :targetMethod | (NBFFICallout targetClass: targetClass targetMethod: targetMethod fnSpec: fnSpec) stdcall; generate: [ :gen | self emitCall: fnIndex generator: gen ] ] ] on: NBNativeCodeError do: [:err :handler | err errorCode = ErrorFnNotAvailable ifTrue: [ "Native code is installed, but function pointer not loaded yet. Try to load function and retry the call" (self tryGetFunctionPointer: (self class glFunctions at: fnIndex)) ifFalse: [ ^ err pass ]. ^ handler retrySend ]. err pass ]
The problem here that NBCallFailureHandler is nowhere to be found. At first I though my NB was lagging behind in version so I download from smalltalk Hub and did
ConfigurationOfNativeboost loadStable.
Neither my image has "NBCallFailureHandler". Looks like you loaded wrong version of NBOpenGL. How did you loaded NBOpenGL? For 2.0/3.0 pharo image use (ConfigurationOfNBOpenGL project version: '2.0') load
it should work out of the box. (and you don't need to load NativeBoost, because it is already in image).
it updated without errors but still that class is nowhere to be found.
So my question is this, does it really worth it to struggle with NBOpengl or will it better to learn how Nativeboost works and use Opengl myself ?
That what exactly NBOpenGL is. Its contents is bindings to OpenGL library (over 3000 functions) the rest is glue code , which mostly serves as an example how to create and initialize opengl context depending on platform you using.
The subcategory "NBOpenGL-Display" contains root classes with that glue code. While NBOpenGL-Core is 99% is just plain opengl api.
If you don't like this glue, you can just avoid using it.. but throwing away opengl core and making own.. makes little sense. I actually encouraged people to write better glue code for initializing context.. The main problem is that its highly platform specific.. and my knowledge doesn't covers deeply all 3 platforms. I did windows and mac parts.. and linux made by Javier.
Oh, and i should also mention, since depending on application you may want to initialize context differently (different pixel format , different number of buffers etc).. you will need to override/rewrite context initialization part by youself. So, the existing context initialization code is more for demo purposes but not for serious use. Another thing, that i don't see how i can provide sufficient "generic" context creation part, because there's a lot of flags and options which sometimes need fine tuning (like selecting most matching pixel format), which would make code too clever, and therefore rigid.. and i know by myself that it is best to be left for developer to decide what he wants and how.
-- View this message in context: http://forum.world.st/Understanding-NBOpenGL-tp4686514.html Sent from the Pharo Smalltalk mailing list archive at Nabble.com.
-- Best regards, Igor Stasenko.
-- Best regards, Igor Stasenko.