VAO and VBO not working. - Printable Version

VAO and VBO not working. - Printable Version

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VAO and VBO not working. - hsunteik - Apr-01-2017

class cube():
    def __init__(self,vertexcount,VAOid):
        self.vertexcount=vertexcount
        self.VAOid=VAOid

    def draw(self):
        GL.glBindVertexArray(self.VAOid)
        GL.glEnableVertexAttributeArray(0)
        GL.glDrawArrays(GL_TRIANGLES,0,self.vertexcount)
        GL.glDisableVertexAttribArray(0)
        GL.glBindVertexArray(0)


#########################################################################################################
class VAO():
    def __init__(self,VAOid,VBOid,attributenum,positions=[],VAOS=[],VBOS=[]):
        self.VAOid,self.VBOid=VAOid,VBOid
        self.positions=positions
        self.attributenum=attributenum
        self.VAOS,self.VBOS=VAOS,VBOS

    def create(self):
        self.VAOid=GL.glGenVertexArrays()
        self.VAOS.append(self.VAOid)
        GL.glBindVertexArray(self.VAOid)
        return self.VAOid

    def store(self,attributenum,data):
        self.VBOid=GL.glGenBuffers()
        self.VBOS.append(self.VBOid)
        GL.glBindBuffer(GL.GL_ARRAY_BUFFER,self.VBOid)

        GL.glBufferData(GL.GL_ARRAY_BUFFER,data,GL.GL_STATIC_DRAW)
        GL.glVertexAttribPointer(attributenum,3,GL.GL_FLOAT,False,0,0)
        GL.glBindBuffer(GL.GL_ARRAY_BUFFER,0)
   
     def clean(self):
        for VAO in self.VAOS:
            GL.glDeleteVertexArrays(VAO)
        for VBO in self.VBOS:
            GL.glDeleteBuffers(VBO)
    def unbind(self):
        GL.glBindVertexArray(0)

    def loadtoVAO(self):
        self.VAOid=self.create()
        self.store(self.attributenum,self.positions)
        self.unbind()
        return cube(self.VAOid,len(self.positions)/3)

Note:This is not the full code just the VAO and VBO part, the part of code that calls this method is also not included.The reason i did not post the full code is because the question asking guideline from this forum says to extract the part that i thinks causes the error only,so here it is.

Error:Traceback (most recent call last):
  File "C:\Users\User\AppData\Local\Programs\Python\Python35-32\lib\site-package
s\pyopengl-3.1.1a1-py3.5.egg\OpenGL\latebind.py", line 41, in __call__
    return self._finalCall( *args, **named )
TypeError: 'NoneType' object is not callable

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "game.py", line 172, in <module>
    game=game(True,'loading','mainmenu',False)
  File "game.py", line 25, in __init__
    square1=VAOcreator.loadtoVAO()
  File "game.py", line 154, in loadtoVAO
    self.VAOid=self.create()
  File "game.py", line 132, in create
    self.VAOid=GL.glGenVertexArrays()
  File "C:\Users\User\AppData\Local\Programs\Python\Python35-32\lib\site-package
s\pyopengl-3.1.1a1-py3.5.egg\OpenGL\latebind.py", line 45, in __call__
    return self._finalCall( *args, **named )
  File "C:\Users\User\AppData\Local\Programs\Python\Python35-32\lib\site-package
s\pyopengl-3.1.1a1-py3.5.egg\OpenGL\wrapper.py", line 655, in wrapperCall
    pyArgs = tuple( calculate_pyArgs( args ))
  File "C:\Users\User\AppData\Local\Programs\Python\Python35-32\lib\site-package
s\pyopengl-3.1.1a1-py3.5.egg\OpenGL\wrapper.py", line 430, in calculate_pyArgs
    args
ValueError: glGenVertexArrays requires 1 arguments (n, arrays), received 0: ()

This code shouldnt give a error,because i copied it(changed a bit) from a youtube tutorial
(https://www.youtube.com/watch?v=WMiggUPst-Q&t=687s)
the few things that i change are:

1)changing the class the method should be in
-the draw method should be in the renderer class(according to the video),but i put it in the cube class.

2)translating from java to python
-the tutorial is in java,so i dont know how to translate it properly,especially the bufferutil part,so i skip that part.(which i think will also work,because it is just used to convert from array\list to buffer)

3)adding constructor
-using the __init__() method in every class

any help will be appreciated. Smile

RE: VAO and VBO not working. - Ofnuts - Apr-01-2017

Error:  File "game.py", line 132, in create
    self.VAOid=GL.glGenVertexArrays()
[.........]
ValueError: glGenVertexArrays requires 1 arguments (n, arrays), received 0: ()

So, it complains it's missing an argument, and your code indeed doesn't provide it (and your code extract doesn't include the problem code...)

RE: VAO and VBO not working. - hsunteik - Apr-01-2017

But i copied it from a youtube tutorial,and it works when he run it.
he doesnt provide the argument for that function,but his code work,why?

RE: VAO and VBO not working. - Ofnuts - Apr-01-2017

1) when some code doesn't work, the best person to ask is the author...

2) check software versions. I see two different signatures for that function (and none of them is the same as the one you use), here and there.

RE: VAO and VBO not working. - hsunteik - Apr-02-2017

After fixing this error ,another error occur.
the error name is NullFunctionError,it says glGenVertexArrays method is undefined,so i checked by doing
print(bool(GL.glGenVertexArrays))
and it returns false,so
i just downloaded GPU caps viewer to check my system supported version.

software
pyopengl version:3.1

gpu/hardware
gpu opengl version:4.0
glsl version:4.0
renderer:Intel® HD Graphic 4400
GPU opengl extension GL_ARB_VAO version:2.1
GPU opengl extension GL_ARB_VBO version:1.5
etc
should i uninstall pyopengl and download a lower version one?
what should i do now?