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Talk:OpenGL: Difference between revisions
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(Commented on 'Go entry broken' section.) |
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== needs local hosting ? ==
This task really needs local hosting of the image in question. I'll work on enabling that sometime later today.--[[User:Short Circuit|Short Circuit]] 03:19, 7 October 2007 (MDT)
:Took me longer than expected, but it is done. See the resident bureaucrats if you need an image uploaded. --[[User:Short Circuit|Short Circuit]] 22:25, 9 October 2007 (MDT)
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Another item: The C example appears to create a managed window, which goes slightly beyond the bounds of the task. Considering that such steps may be necessary for some languages, it should be mentioned in the example preamble. --[[User:Short Circuit|Short Circuit]] 12:21, 8 October 2007 (MDT)
===Go entry broken===
It seems "github.com/mewmew/glfw/win" has not been updated in 5 years, matching when the Go sample was last modified.
My suspicion is that glfw has been updated meanwhile and now split into 3.0/3.1/3.2 or something like that.
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:Hi Pete. Although I didn't write the original, I've managed to fix it (at least on my Ubuntu 16.04 box) by using the newer 'GLFW 3.2 for Go' library. When I have time, I'll see if it works on Windows 10 as well.--[[User:PureFox|PureFox]] ([[User talk:PureFox|talk]]) 20:20, 22 January 2019 (UTC)
::Hi. Tested on Windows 10: failed with "unable to initialize VERSION_1_2", tracked down to the err from gl.Init().
::In case it helps, it opens C:\Windows\System32\opengl32.dll and glu32.dll, both version 10.0.17134.1 (18/04/2018).
::There was no error from glfw.Init(), and if I comment out the third&last check(err) line, it runs fine. --[[User:Petelomax|Pete Lomax]] ([[User talk:Petelomax|talk]]) 23:31, 22 January 2019 (UTC)
:I've just tried it on Windows 10 myself but with exactly the same results as you obtained.
:My versions of opengl32.dll and glu32.dll are a bit earlier than yours - 10.0.16299.15 (29/09/17).
:I've tracked down the error to this C function which is called (via cgo) by gl.Init() in gl21.go:
<lang c>int init_VERSION_2_1() {
ptrglUniformMatrix2x3fv = goglGetProcAddress("glUniformMatrix2x3fv");
if(ptrglUniformMatrix2x3fv == NULL) return 1;
ptrglUniformMatrix3x2fv = goglGetProcAddress("glUniformMatrix3x2fv");
if(ptrglUniformMatrix3x2fv == NULL) return 1;
ptrglUniformMatrix2x4fv = goglGetProcAddress("glUniformMatrix2x4fv");
if(ptrglUniformMatrix2x4fv == NULL) return 1;
ptrglUniformMatrix4x2fv = goglGetProcAddress("glUniformMatrix4x2fv");
if(ptrglUniformMatrix4x2fv == NULL) return 1;
ptrglUniformMatrix3x4fv = goglGetProcAddress("glUniformMatrix3x4fv");
if(ptrglUniformMatrix3x4fv == NULL) return 1;
ptrglUniformMatrix4x3fv = goglGetProcAddress("glUniformMatrix4x3fv");
if(ptrglUniformMatrix4x3fv == NULL) return 1;
return 0;
}</lang>
:So it appears that one (or more) of these tests is producing a null pointer though - as it works fine when the error returned by :gl.Init() is ignored - that this doesn't matter as far as this particular application is concerned.
:I've tried various things including updating the graphics card driver but to no avail so, unless you've any other ideas, I think for now I'll just note that it ''may'' only work on Windows 10 if you ignore the initialization error.--[[User:PureFox|PureFox]] ([[User talk:PureFox|talk]]) 11:15, 23 January 2019 (UTC)
::plenty good enough for me, thanks. --[[User:Petelomax|Pete Lomax]] ([[User talk:Petelomax|talk]]) 16:40, 23 January 2019 (UTC)
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