On Sun, Feb 24, 2008 at 5:21 PM, Alex <[EMAIL PROTECTED]> wrote:
>
> Hello!
>
> After learning Python for a while, I started experimenting with pyglet
> and converting some projects from jogl.
>
> And now I get some errors with the code for shaders. It seems it has
> something to do with ctypes, but I haven't looked into them yet. And
> they look pretty complicated.
>
> Code:
>
> vertex = glCreateShader(GL_VERTEX_SHADER)
> fragment = glCreateShader(GL_FRAGMENT_SHADER)
>
> vsource = 'void main()\n{\ngl_FrontColor = vec4(1.0, 1.0, 1.0,
> 1.0);\ngl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;\n}'
> glShaderSource(vertex, 1, vsource, 0)
> glCompileShader(vertex)
>
> fsource = 'void main()\n{\ngl_FragColor = gl_Color;\n}'
> glShaderSource(fragment, 1, fsource, 0)
> glCompileShader(fragment)
>
> self.program = glCreateProgram()
> glAttachShader(self.program, vertex)
> glAttachShader(self.program, fragment)
> glLinkProgram(self.program)
> glValidateProgram(self.program)
>
> error:
>
> glShaderSource(vertex, 1, vsource, 0)
> ctypes.ArgumentError: argument 3: <type 'exceptions.TypeError'>:
> expected LP_LP_c_char instance instead of str
>
You need to convert the string to the protype C type, like:
def _shaderSource(text, shader_type=GL_VERTEX_SHADER):
buff = c.create_string_buffer(text)
c_text = c.cast(c.pointer(c.pointer(buff)), c.POINTER(c.POINTER(GLchar)))
shader = glCreateShader(shader_type)
glShaderSource(shader, 1, c_text, None)
return shader
--
\\\\\/\"/\\\\\\\\\\\
\\\\/ // //\/\\\\\\\
\\\/ \\// /\ \/\\\\
\\/ /\/ / /\/ /\ \\\
\/ / /\/ /\ /\\\ \\
/ /\\\ /\\\ \\\\\/\
\/\\\\\/\\\\\/\\\\\\
d.p.s
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