Like so?
> gauss = pyshaders.from_string('''#version 130
> attribute vec4 a_position;
> attribute vec2 a_texCoord;
> varying vec2 v_texCoord;
> varying vec2 v_blurTexCoords[14];
> void main()
> {
> gl_Position = a_position;
> v_texCoord = a_texCoord;
> v_blurTexCoords[ 0] = v_texCoord + vec2(-0.028, 0.0);
> v_blurTexCoords[ 1] = v_texCoord + vec2(-0.024, 0.0);
> v_blurTexCoords[ 2] = v_texCoord + vec2(-0.020, 0.0);
> v_blurTexCoords[ 3] = v_texCoord + vec2(-0.016, 0.0);
> v_blurTexCoords[ 4] = v_texCoord + vec2(-0.012, 0.0);
> v_blurTexCoords[ 5] = v_texCoord + vec2(-0.008, 0.0);
> v_blurTexCoords[ 6] = v_texCoord + vec2(-0.004, 0.0);
> v_blurTexCoords[ 7] = v_texCoord + vec2( 0.004, 0.0);
> v_blurTexCoords[ 8] = v_texCoord + vec2( 0.008, 0.0);
> v_blurTexCoords[ 9] = v_texCoord + vec2( 0.012, 0.0);
> v_blurTexCoords[10] = v_texCoord + vec2( 0.016, 0.0);
> v_blurTexCoords[11] = v_texCoord + vec2( 0.020, 0.0);
> v_blurTexCoords[12] = v_texCoord + vec2( 0.024, 0.0);
> v_blurTexCoords[13] = v_texCoord + vec2( 0.028, 0.0);
> }''','''#version 130
> precision mediump float;
>
> uniform sampler2D s_texture;
>
> varying vec2 v_texCoord;
> varying vec2 v_blurTexCoords[14];
> void main()
> {
> gl_FragColor = vec4(0.0);
> gl_FragColor += texture2D(s_texture, v_blurTexCoords[
> 0])*0.0044299121055113265;
> gl_FragColor += texture2D(s_texture, v_blurTexCoords[
> 1])*0.00895781211794;
> gl_FragColor += texture2D(s_texture, v_blurTexCoords[
> 2])*0.0215963866053;
> gl_FragColor += texture2D(s_texture, v_blurTexCoords[
> 3])*0.0443683338718;
> gl_FragColor += texture2D(s_texture, v_blurTexCoords[
> 4])*0.0776744219933;
> gl_FragColor += texture2D(s_texture, v_blurTexCoords[
> 5])*0.115876621105;
> gl_FragColor += texture2D(s_texture, v_blurTexCoords[
> 6])*0.147308056121;
> gl_FragColor += texture2D(s_texture, v_texCoord
> )*0.159576912161;
> gl_FragColor += texture2D(s_texture, v_blurTexCoords[
> 7])*0.147308056121;
> gl_FragColor += texture2D(s_texture, v_blurTexCoords[
> 8])*0.115876621105;
> gl_FragColor += texture2D(s_texture, v_blurTexCoords[
> 9])*0.0776744219933;
> gl_FragColor += texture2D(s_texture,
> v_blurTexCoords[10])*0.0443683338718;
> gl_FragColor += texture2D(s_texture,
> v_blurTexCoords[11])*0.0215963866053;
> gl_FragColor += texture2D(s_texture,
> v_blurTexCoords[12])*0.00895781211794;
> gl_FragColor += texture2D(s_texture,
> v_blurTexCoords[13])*0.0044299121055113265;
> }''')
>
Tried the above, with a few variations. No luck; the error message is the
same.
On Friday, 22 July 2016 20:30:52 UTC-6, [email protected] wrote:
>
> Pyshader developer here. Try to add "#version 130" at the top. The shader
> you are trying is for an old version of opengl and glsl. Without this, the
> compiler will try to use the most recent version.
>
> I was able to compile it on my computer once the version was added.
>
> Le vendredi 22 juillet 2016 13:51:57 UTC-4, Erik Olson a écrit :
>>
>> The code I am currently trying to run is this, with the shader functions
>> being examples I found on the internet:
>>
>>> gauss = pyshaders.from_string('''attribute vec4 a_position;
>>> attribute vec2 a_texCoord;
>>>
>>> varying vec2 v_texCoord;
>>> varying vec2 v_blurTexCoords[14];
>>>
>>> void main()
>>> {
>>> gl_Position = a_position;
>>> v_texCoord = a_texCoord;
>>> v_blurTexCoords[ 0] = v_texCoord + vec2(-0.028, 0.0);
>>> v_blurTexCoords[ 1] = v_texCoord + vec2(-0.024, 0.0);
>>> v_blurTexCoords[ 2] = v_texCoord + vec2(-0.020, 0.0);
>>> v_blurTexCoords[ 3] = v_texCoord + vec2(-0.016, 0.0);
>>> v_blurTexCoords[ 4] = v_texCoord + vec2(-0.012, 0.0);
>>> v_blurTexCoords[ 5] = v_texCoord + vec2(-0.008, 0.0);
>>> v_blurTexCoords[ 6] = v_texCoord + vec2(-0.004, 0.0);
>>> v_blurTexCoords[ 7] = v_texCoord + vec2( 0.004, 0.0);
>>> v_blurTexCoords[ 8] = v_texCoord + vec2( 0.008, 0.0);
>>> v_blurTexCoords[ 9] = v_texCoord + vec2( 0.012, 0.0);
>>> v_blurTexCoords[10] = v_texCoord + vec2( 0.016, 0.0);
>>> v_blurTexCoords[11] = v_texCoord + vec2( 0.020, 0.0);
>>> v_blurTexCoords[12] = v_texCoord + vec2( 0.024, 0.0);
>>> v_blurTexCoords[13] = v_texCoord + vec2( 0.028, 0.0);
>>> }''','''precision mediump float;
>>>
>>> uniform sampler2D s_texture;
>>>
>>> varying vec2 v_texCoord;
>>> varying vec2 v_blurTexCoords[14];
>>>
>>> void main()
>>> {
>>> gl_FragColor = vec4(0.0);
>>> gl_FragColor += texture2D(s_texture, v_blurTexCoords[
>>> 0])*0.0044299121055113265;
>>> gl_FragColor += texture2D(s_texture, v_blurTexCoords[
>>> 1])*0.00895781211794;
>>> gl_FragColor += texture2D(s_texture, v_blurTexCoords[
>>> 2])*0.0215963866053;
>>> gl_FragColor += texture2D(s_texture, v_blurTexCoords[
>>> 3])*0.0443683338718;
>>> gl_FragColor += texture2D(s_texture, v_blurTexCoords[
>>> 4])*0.0776744219933;
>>> gl_FragColor += texture2D(s_texture, v_blurTexCoords[
>>> 5])*0.115876621105;
>>> gl_FragColor += texture2D(s_texture, v_blurTexCoords[
>>> 6])*0.147308056121;
>>> gl_FragColor += texture2D(s_texture, v_texCoord
>>> )*0.159576912161;
>>> gl_FragColor += texture2D(s_texture, v_blurTexCoords[
>>> 7])*0.147308056121;
>>> gl_FragColor += texture2D(s_texture, v_blurTexCoords[
>>> 8])*0.115876621105;
>>> gl_FragColor += texture2D(s_texture, v_blurTexCoords[
>>> 9])*0.0776744219933;
>>> gl_FragColor += texture2D(s_texture,
>>> v_blurTexCoords[10])*0.0443683338718;
>>> gl_FragColor += texture2D(s_texture,
>>> v_blurTexCoords[11])*0.0215963866053;
>>> gl_FragColor += texture2D(s_texture,
>>> v_blurTexCoords[12])*0.00895781211794;
>>> gl_FragColor += texture2D(s_texture,
>>> v_blurTexCoords[13])*0.0044299121055113265;
>>> }''')
>>>
>>
>> which gives the error
>>
>>> File
>>> "C:\Users\Erik\Documents\Programming\workspace\drawingLessons\src\draw.py",
>>> line 150, in <module>
>>> }''')
>>> File "C:\Users\Erik\Anaconda3\lib\site-packages\pyshaders.py", line
>>> 791, in from_string
>>> raise ShaderCompilationError(prog.logs)
>>> pyshaders.ShaderCompilationError: Shaders Errors:
>>>
>>> ERROR: Definition for "void main()" not found.
>>
>> Not sure what exactly is wrong here.
>>
>> On Friday, 22 July 2016 11:00:33 UTC-6, Erik Olson wrote:
>>>
>>> Actually, it probably would have helped if I were using the correct
>>> version of python. Oops. I was still on 2.7 due to working with some
>>> outdated libraries which I had long since abandoned, and just hadn't
>>> thought to switch back. It imports just fine now.
>>>
>>> On Friday, 22 July 2016 10:13:43 UTC-6, Erik Olson wrote:
>>>>
>>>> As best I can tell, the error occurs purely from trying to import
>>>> pyshaders. I tried running solely "import pyshaders" with no other code,
>>>> and it still gave the same error. It appears to be taking issue with:
>>>>
>>>> File "C:\Users\Erik\Anaconda2\lib\site-packages\pyshaders.py", line
>>>>> 167
>>>>> c_type, bcount, setter, *mat_size = UNIFORMS_DATA[type]
>>>>>
>>>> and in particular once it reaches the asterisk (which makes it a rather
>>>> annoying error to try to search for on google). I might indeed report
>>>> this
>>>> as a bug, if looking into those extensions doesn't yield anything.
>>>>
>>>> On Thursday, 21 July 2016 19:43:28 UTC-6, Benjamin Moran wrote:
>>>>>
>>>>> I'm not very familiar with the library yet, but from what I can see it
>>>>> requires activating some extensions for higher level GLSL support. If you
>>>>> can share a copy of the code you're trying to run, I can give it a try
>>>>> here. You might also consider just openening up a ticket on the project
>>>>> page if it turns out to be a bug.
>>>>>
>>>>>
>>>>>
>>>>> On Thursday, July 21, 2016 at 5:14:31 AM UTC+9, Erik Olson wrote:
>>>>>>
>>>>>> Thanks for the suggestion! I'm currently looking it over. I tried
>>>>>> inserting the strings for an example vertex and fragment shader I found,
>>>>>> but I haven't been able to get pyshaders to work. It keeps giving the
>>>>>> following error:
>>>>>>
>>>>>> Traceback (most recent call last):
>>>>>>> File
>>>>>>> "C:\Users\Erik\Documents\Programming\workspace\drawingLessons\src\draw.py",
>>>>>>>
>>>>>>> line 12, in <module>
>>>>>>> import pyshaders
>>>>>>> File "C:\Users\Erik\Anaconda2\lib\site-packages\pyshaders.py",
>>>>>>> line 167
>>>>>>> c_type, bcount, setter, *mat_size = UNIFORMS_DATA[type]
>>>>>>> ^
>>>>>>> SyntaxError: invalid syntax
>>>>>>>
>>>>>> Not really sure what's going on there. As far as I can tell the
>>>>>> error seems to be an issue with pyshaders itself.
>>>>>>
>>>>>>
>>>>>>
>>>>>> On Wednesday, 20 July 2016 02:57:32 UTC-6, Benjamin Moran wrote:
>>>>>>>
>>>>>>> Hi Erik,
>>>>>>>
>>>>>>> I think the issue with shaders on pyglet at the moment is that you
>>>>>>> need some ctypes knowlege in order to make use of the OpenGL bindings.
>>>>>>> There aren't currently any built-in abstractions that make things
>>>>>>> easier.
>>>>>>>
>>>>>>> However, Gabriel Dube has recently released a new shader library for
>>>>>>> pyglet: https://github.com/gabdube/pyshaders
>>>>>>> That may do what you want. Have a look, and post back.
>>>>>>>
>>>>>>> -Ben
>>>>>>>
>>>>>>>
>>>>>>> On Tuesday, July 19, 2016 at 2:02:41 AM UTC+9, Erik Olson wrote:
>>>>>>>>
>>>>>>>> Hello!
>>>>>>>>
>>>>>>>> I am currently using pyglet for neuroscience research and have
>>>>>>>> encountered an issue. The program I currently have draws simple black
>>>>>>>> primitives (triangle fans, etc.) to a blank white screen. What I
>>>>>>>> would
>>>>>>>> like to do now is to be able to draw some of the primitives which
>>>>>>>> represent
>>>>>>>> a background, apply a gaussian blur using a shader, then draw the
>>>>>>>> remaining
>>>>>>>> objects on top, unblurred. I have found extensive examples of shader
>>>>>>>> classes to use in pyglet, along with resources stating how to write
>>>>>>>> shaders
>>>>>>>> in GLSL. However, I have found practically nothing explaining how to
>>>>>>>> use
>>>>>>>> existing shaders to actually do things. Currently I am working with
>>>>>>>> Tristam McDonald's shader class, but I have no idea how I would
>>>>>>>> actually
>>>>>>>> get such shaders to apply to what appears on the screen.
>>>>>>>>
>>>>>>>> What should the code actually look like? Are there any good
>>>>>>>> resources or examples (which I seem to be completely unable to find)?
>>>>>>>> It
>>>>>>>> seems like anywhere discussing how to use shaders glosses over this
>>>>>>>> part,
>>>>>>>> which makes me wonder if it's really obvious and I'm just an idiot.
>>>>>>>>
>>>>>>>
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