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    <p>My comment went just over the limit of characters, so hopefully this is worth an answer.</p> <p>The only thing I can see that might be a problem are your <code>glUniformMatrix4fv</code> calls. The second parameter, according to the <a href="http://www.opengl.org/sdk/docs/man4/xhtml/glUniform.xml" rel="nofollow">OpenGl 4 language reference</a> describes it as the number of matrices to change. The 3.2 core reference pages aren't linked on their site, so I couldn't look it up for that particular context. So for <code>glUniformMatrix4fv(projection_loc, 16, GL_TRUE, projection);</code> it intends to find sixteen matrices in an array called "Projection", yet you only defined <code>uniform mat4 Projection;</code>. This may or may not be a part of your problem, and it's possible I'm not even correct, especially if this is a known tutorial that other people have compiled/used.</p> <p>Also, glEnable(GL_TEXTURE_2D) isn't necessary (<a href="http://www.opengl.org/discussion_boards/showthread.php/171415-OpenGL-3-X-glEnable%28GL_TEXTURE_2D%29-GL_INVALID_ENUM" rel="nofollow">or even usable, i think?</a>) with an OpenGL context of version 3.2 core, which was set up here:</p> <pre><code>glutInitContextVersion( 3, 2 ); glutInitContextProfile( GLUT_CORE_PROFILE ); </code></pre> <p>If the compiler isn't giving you any errors, trying adding <code>glGetError()</code> after lines which you think may be problematic. The return value maps to an enum value in the header file for OpenGL (<a href="http://www.opengl.org/registry/#headers" rel="nofollow">glcorearb.h</a> will list them), and i think the documentation lists them as well.</p> <p>Other than that, you may just want to check that the "normals" 3-dimensional array is laid out in memory the way you expect it to be, as I've never tried manually constructing an array to be used as a texture myself (though images are basically strings of byte data anyways, so I don't see how it's a problem in this case).</p> <p>Hopefully this helped you, or at least pointed you in the right direction. Good luck.</p> <p><strong>Edit #1</strong>: I realized my comment about shader checking wasn't very complete, as I failed to mention some API calls. Here's an example of it though:</p> <pre><code> char * dataBuffer; struct _stat fileStat; long fLen; FILE * vSh; FILE * fSh; int desc; GLint status; GLint logLength; GLuint vShader = glCreateShader(GL_VERTEX_SHADER); //errort = glGetError(); GLuint fShader = glCreateShader(GL_FRAGMENT_SHADER); GLuint program = glCreateProgram(); /*__________________________________________________*/ vSh = fopen("vShader.vSh", "r"); desc = _fileno(vSh); _fstat(desc, &amp;fileStat); fLen = fileStat.st_size; dataBuffer = (char *) calloc((fLen + 1), sizeof(char)); if (dataBuffer == NULL) { MessageBox(NULL, "Malloc failure: VS", "Create Program", MB_OK | MB_ICONINFORMATION); return 1; } if(feof(vSh) == 0) { MessageBox(NULL, "Did not reach EoF for VS", "Create Program", MB_OK | MB_ICONINFORMATION); return 2; } fclose(vSh); glShaderSource(vShader, 1, &amp;dataBuffer, NULL); glCompileShader(vShader); //Error checking glGetShaderiv(vShader, GL_COMPILE_STATUS, &amp;status); if (status == GL_FALSE) { glGetShaderiv(vShader, GL_INFO_LOG_LENGTH, &amp;logLength); char resultV[logLength+1]; glGetShaderInfoLog(vShader, logLength, NULL, resultV); MessageBox(NULL, resultV, "Vertex Compile Error", MB_OK); } free(dataBuffer); </code></pre> <p>The way I get my shader isn't the real important part, so hopefully that doesn't confuse you. The part labelled <code>//Error checking</code> is the stuff I meant, when talking about checking your shader for errors.</p>
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    1. COThanks for giving this thought. Good find for the matrix calls, it seems the author mistook the second the parameter for element count rather than matrix count. I thought this must be the issue, but I changed all of the 16's in these calls to 1's and still nothing! I also tried getting rid of the glEnable. Strange thing about error checking: I get error 1282 no matter where I check (even in working code), EXCEPT for a check that I put below glTexImage2D() in, where I get 1280 (GL_INVALID_ENUM?). I can't put much more time into this at the moment, but I appreciate your help.
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    2. COJust looked at the reference pages, and apparently more than one error flag can be raised, but only one flag gets returned at a time per call. So you need to loop until you see `GL_NO_ERROR`, to be sure there aren't other errors hiding around. If it is _always_ 1282, then I'm not sure what's going on... it's possibly that the flag values are OR'd together, so you're getting a combination of errors. On the other hand, it might be gibberish? I really don't know. I'll take a look at the code another time, perhaps. No time at the moment.
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    3. COAlso take a look at glGetShaderInfoLog and glGetProgramInfoLog from the reference pages. I use those to debug my shaders, and they work fairly well. I can edit my answer with an example if you'd like. Or does InitShader take care of that?
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