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POLots of undeclared identifiers related to OpenGL using GLFW
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  1. POLots of undeclared identifiers related to OpenGL using GLFW
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    copied!<p>I'm trying to set up an OpenGL project using GLFW in Visual c++ 2008 (Windows 7). I have added the GLFW include and library directories to the project's include and library paths, and I have put the following in additional dependencies:</p> <pre><code>GLFW.lib glu32.lib opengl32.lib </code></pre> <p>That is everything I need to do, isn't it? But when I try to compile any OpenGl program (except an extremely simple one that only clears the screen using glClear) I get a bunch of undeclared identifier and identifier not found erros. Any Idea why this can happen? Here is the complete error list: </p> <pre><code>1&gt;Compiling... 1&gt;main.cpp 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(9) : error C2146: syntax error : missing ';' before identifier 'VBO' 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(9) : error C2377: 'GLuint' : redefinition; typedef cannot be overloaded with any other symbol 1&gt; c:\program files\microsoft sdks\windows\v6.0a\include\gl\gl.h(52) : see declaration of 'GLuint' 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(9) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(43) : error C3861: 'glEnableVertexAttribArray': identifier not found 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(45) : error C2065: 'GL_ARRAY_BUFFER' : undeclared identifier 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(45) : error C3861: 'glBindBuffer': identifier not found 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(47) : error C3861: 'glVertexAttribPointer': identifier not found 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(55) : error C3861: 'glDisableVertexAttribArray': identifier not found 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(78) : error C3861: 'glGenBuffers': identifier not found 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(80) : error C2065: 'GL_ARRAY_BUFFER' : undeclared identifier 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(80) : error C3861: 'glBindBuffer': identifier not found 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(82) : error C2065: 'GL_ARRAY_BUFFER' : undeclared identifier 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(82) : error C2065: 'GL_STATIC_DRAW' : undeclared identifier 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(82) : error C3861: 'glBufferData': identifier not found 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(87) : error C2146: syntax error : missing ')' before identifier 'ShaderProgram' 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(87) : error C2182: 'AddShader' : illegal use of type 'void' 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(87) : error C2440: 'initializing' : cannot convert from 'Vector3f' to 'int' 1&gt; No user-defined-conversion operator available that can perform this conversion, or the operator cannot be called 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(87) : error C2059: syntax error : ')' 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(89) : error C2143: syntax error : missing ';' before '{' 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(89) : error C2447: '{' : missing function header (old-style formal list?) 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(144) : error C2146: syntax error : missing ';' before identifier 'ShaderProgram' 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(144) : error C2065: 'ShaderProgram' : undeclared identifier 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(144) : error C3861: 'glCreateProgram': identifier not found 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(148) : error C2065: 'ShaderProgram' : undeclared identifier 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(158) : error C2065: 'ShaderProgram' : undeclared identifier 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(158) : error C2065: 'GL_VERTEX_SHADER' : undeclared identifier 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(160) : error C2065: 'ShaderProgram' : undeclared identifier 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(160) : error C2065: 'GL_FRAGMENT_SHADER' : undeclared identifier 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(166) : error C2065: 'GLchar' : undeclared identifier 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(166) : error C2146: syntax error : missing ';' before identifier 'ErrorLog' 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(166) : error C2065: 'ErrorLog' : undeclared identifier 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(166) : error C2059: syntax error : '{' 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(166) : error C2143: syntax error : missing ';' before '{' 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(166) : error C2143: syntax error : missing ';' before '}' 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(170) : error C2065: 'ShaderProgram' : undeclared identifier 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(170) : error C3861: 'glLinkProgram': identifier not found 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(172) : error C2065: 'ShaderProgram' : undeclared identifier 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(172) : error C2065: 'GL_LINK_STATUS' : undeclared identifier 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(172) : error C3861: 'glGetProgramiv': identifier not found 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(176) : error C2065: 'ShaderProgram' : undeclared identifier 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(176) : error C2065: 'ErrorLog' : undeclared identifier 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(176) : error C2070: ''unknown-type'': illegal sizeof operand 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(176) : error C2065: 'ErrorLog' : undeclared identifier 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(176) : error C3861: 'glGetProgramInfoLog': identifier not found 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(178) : error C2065: 'ErrorLog' : undeclared identifier 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(186) : error C2065: 'ShaderProgram' : undeclared identifier 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(186) : error C3861: 'glValidateProgram': identifier not found 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(188) : error C2065: 'ShaderProgram' : undeclared identifier 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(188) : error C2065: 'GL_VALIDATE_STATUS' : undeclared identifier 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(188) : error C3861: 'glGetProgramiv': identifier not found 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(192) : error C2065: 'ShaderProgram' : undeclared identifier 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(192) : error C2065: 'ErrorLog' : undeclared identifier 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(192) : error C2070: ''unknown-type'': illegal sizeof operand 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(192) : error C2065: 'ErrorLog' : undeclared identifier 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(192) : error C3861: 'glGetProgramInfoLog': identifier not found 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(194) : error C2065: 'ErrorLog' : undeclared identifier 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(202) : error C2065: 'ShaderProgram' : undeclared identifier 1&gt;c:\glfw-2.7.3\opengl ikasi\main.cpp(202) : error C3861: 'glUseProgram': identifier not found </code></pre> <p>EDIT: here is the whole program</p> <pre><code>#include &lt;stdio.h&gt; #include &lt;string.h&gt; #include &lt;GL/glfw.h&gt; #include "math_3d.h" GLuint VBO; static const char* pVS = " \n\ #version 150 \n\ \n\ layout (location = 0) in vec3 Position; \n\ \n\ void main() \n\ { \n\ gl_Position = vec4(0.5 * Position.x, 0.5 * Position.y, Position.z, 1.0); \n\ }"; static const char* pFS = " \n\ #version 150 \n\ \n\ out vec4 FragColor; \n\ \n\ void main() \n\ { \n\ FragColor = vec4(1.0, 0.0, 0.0, 1.0); \n\ }"; static void RenderSceneCB() { glClear(GL_COLOR_BUFFER_BIT); glEnableVertexAttribArray(0); glBindBuffer(GL_ARRAY_BUFFER, VBO); glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, 0); glDrawArrays(GL_TRIANGLES, 0, 3); glDisableVertexAttribArray(0); glfwSwapBuffers(); } static void CreateVertexBuffer() { Vector3f Vertices[3]; Vertices[0] = Vector3f(-1.0f, -1.0f, 0.0f); Vertices[1] = Vector3f(1.0f, -1.0f, 0.0f); Vertices[2] = Vector3f(0.0f, 1.0f, 0.0f); glGenBuffers(1, &amp;VBO); glBindBuffer(GL_ARRAY_BUFFER, VBO); glBufferData(GL_ARRAY_BUFFER, sizeof(Vertices), Vertices, GL_STATIC_DRAW); } static void AddShader(GLuint ShaderProgram, const char* pShaderText, GLenum ShaderType) { GLuint ShaderObj = glCreateShader(ShaderType); if (ShaderObj == 0) { fprintf(stderr, "Error creating shader type %d\n", ShaderType); return ; } const GLchar* p[1]; p[0] = pShaderText; GLint Lengths[1]; Lengths[0]= strlen(pShaderText); glShaderSource(ShaderObj, 1, p, Lengths); glCompileShader(ShaderObj); GLint success; glGetShaderiv(ShaderObj, GL_COMPILE_STATUS, &amp;success); if (!success) { GLchar InfoLog[1024]; glGetShaderInfoLog(ShaderObj, 1024, NULL, InfoLog); fprintf(stderr, "Error compiling shader type %d: '%s'\n", ShaderType, InfoLog); return; } glAttachShader(ShaderProgram, ShaderObj); } static void CompileShaders() { GLuint ShaderProgram = glCreateProgram(); if (ShaderProgram == 0) { fprintf(stderr, "Error creating shader program\n"); return; } AddShader(ShaderProgram, pVS, GL_VERTEX_SHADER); AddShader(ShaderProgram, pFS, GL_FRAGMENT_SHADER); GLint Success = 0; GLchar ErrorLog[1024] = { 0 }; glLinkProgram(ShaderProgram); glGetProgramiv(ShaderProgram, GL_LINK_STATUS, &amp;Success); if (Success == 0) { glGetProgramInfoLog(ShaderProgram, sizeof(ErrorLog), NULL, ErrorLog); fprintf(stderr, "Error linking shader program: '%s'\n", ErrorLog); return; } glValidateProgram(ShaderProgram); glGetProgramiv(ShaderProgram, GL_VALIDATE_STATUS, &amp;Success); if (!Success) { glGetProgramInfoLog(ShaderProgram, sizeof(ErrorLog), NULL, ErrorLog); fprintf(stderr, "Invalid shader program: '%s'\n", ErrorLog); return; } glUseProgram(ShaderProgram); } int main(int argc, char** argv) { glfwInit(); glfwOpenWindowHint(GLFW_OPENGL_VERSION_MAJOR, 3); glfwOpenWindowHint(GLFW_OPENGL_VERSION_MINOR, 2); glfwOpenWindow(600, 600, 0, 0, 0, 0, 0, 0, GLFW_WINDOW); glClearColor(0.0f, 0.0f, 0.0f, 0.0f); CreateVertexBuffer(); CompileShaders(); while (1) { RenderSceneCB(); } return 0; } </code></pre> <p>EDIT 2: And here the math_3d.h header</p> <pre><code>#ifndef MATH_3D_H #define MATH_3D_H struct Vector3f { float x; float y; float z; Vector3f() { } Vector3f(float _x, float _y, float _z) { x = _x; y = _y; z = _z; } }; #endif </code></pre>
 

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