And I love pharo and what you guys have created , a lot of fun and very productive. So yes I will definitely help you out in documenting NB.
Actually my idea was not to publish in a blog. I hate blogs though I have one I just find it very non flexible so I was thinking instead wikibooks . http://en.wikibooks.org/wiki/Help:Contributing <http://en.wikibooks.org/wiki/Help:Contributing> I was thinking moving the entire nativeboost docs (pdf/latex) to wiki books so I make it much easier for everyone can contribute. Wikibooks uses Mediawiki which I am familiar with from the blender wiki when I was making my python book http://wiki.blender.org/index.php/User:Kilon/Python_book_of_magic <http://wiki.blender.org/index.php/User:Kilon/Python_book_of_magic> Mediawiki is nowhere near as powerful as latex but its way easier to learn and it literally takes minutes to learn the syntax and you dont need a special editor you can do it online directly with minimum syntax. This way everyone can contribute , it only needs an account. Stéphane Ducasse wrote > I love your questions! > When you will get all your anwsers you have to write a blog about it so > that we can use that in > a chapter so that every body can know how to do it. > > Just no time to think right now :( sadly > > Stef > > On Jul 1, 2013, at 8:40 PM, kilon < > [email protected] > > wrote: > >> Thanks Igor , yes I was aware of String Cr because I have done some >> googling >> around and it did find information on the subject. Apparently it failed >> because I had an error in my source. >> >> So for our next challenge is learning how to fetch data that a pointer >> points to. >> >> in this case I have an array that contains my vertex positions , called >> vertexPositions >> >> vertexPositions >> "the positions of vertices to be passed to opengl" >> >> ^ #( 0.75 0.75 0.0 1.0 >> 0.75 -0.75 0.0 1.0 >> -0.75 -0.75 0.0 1.0 ) >> >> so far so good >> >> so I create a pointer for that array >> >> vptrsize := (NBExternalType sizeOf: 'float')* self vertexPositions size. >> >> and then take that pointer and insert in each position the individual >> values >> from vertexPositions >> >> vertexPositions withIndexDo: [:each :i | >> "using nbUInt32AtOffset because we know pointer is 4 bytes :) " >> vpos nbFloat32AtOffset: (i-1)*(NBExternalType sizeOf: 'float') >> put: >> each value. >> Transcript show: ' I am putting to vpos in index: '; show: i-1; show:' >> value: '; show: each value; cr. >> ]. >> >> so far so good. >> >> now the tricky part is that I have a function that expects that Array , >> not >> the smalltalk version but the C version we just created >> >> gl bufferData_target: GL_ARRAY_BUFFER size: vptrsize data: ....... >> usage: >> GL_STATIC_DRAW. >> >> where you see the dots is where I should pass the data, in this case the >> C >> array >> >> I could do a vpo nbFloat32AtOffset: but that will return me only the >> individual value at the specific point (index) of the array, while I want >> to >> pass the entire array. >> >> So how I do that ? >> >> I explored NBExternalAdress and I cant find something that would return >> an >> array. Am I missing something obvious here ? >> >> NBExternalAdress value , returns the number of the address and not that >> data >> contained in that address. >> >> I also see a NBExternalArray but I am not sure if it is what I should be >> using . >> >> Igor Stasenko wrote >>> On 30 June 2013 21:11, kilon < >> >>> [email protected] >> >>> > wrote: >>>> I am not going to post my code here cause it has become too big , you >>>> can >>>> find it here >>>> >>>> http://www.smalltalkhub.com/#!/~kilon/GLTutorial >>>> <http://www.smalltalkhub.com/#!/~kilon/GLTutorial> >>>> >>>> I tried adding newlines with String cr to my shaders strings, but >>>> apparently >>>> opengl is not convinced. It looks like smalltalk cr is not converted to >>>> C >>>> "\n" newlines. So how I do that ? >>>> >>> >>> simply replace all occurences of >>> Character cr >>> with >>> Character lf >>> (or crlf, if it wants that) >>> >>>> -- >>>> View this message in context: >>>> http://forum.world.st/Understanding-NBOpenGL-tp4686514p4696465.html >>>> Sent from the Pharo Smalltalk Developers mailing list archive at >>>> Nabble.com. >>>> >>> >>> >>> >>> -- >>> Best regards, >>> Igor Stasenko. >> >> >> >> >> >> -- >> View this message in context: >> http://forum.world.st/Understanding-NBOpenGL-tp4686514p4696666.html >> Sent from the Pharo Smalltalk Developers mailing list archive at >> Nabble.com. >> -- View this message in context: http://forum.world.st/Understanding-NBOpenGL-tp4686514p4696807.html Sent from the Pharo Smalltalk Developers mailing list archive at Nabble.com.
