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我正在使用 GLFW 和 GLEW 设置一个 OpenGL 3.2 Xcode 项目。我已将 GLFW 包含路径添加到标头路径，并将 libglfw.a 添加到项目中。我还添加了 cocoa 和 OpenGL 框架。然后我尝试使用这个示例代码：

主.cpp：

#include <stdio.h>
#include <string.h>
#include <GL/glew.h>
#include <GL/glfw.h>
#include "math3d.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 RenderScene()
{
    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, &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, &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, &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, &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);
    glfwOpenWindowHint(GLFW_OPENGL_PROFILE,GLFW_OPENGL_CORE_PROFILE);
    glfwOpenWindow(600, 600, 0, 0, 0, 0, 0, 0, GLFW_WINDOW);

    GLenum err = glewInit();
    if (GLEW_OK != err)
    {
        /* Problem: glewInit failed, something is seriously wrong. */
        fprintf(stderr, "Error: %s\n", glewGetErrorString(err));
    }


    CreateVertexBuffer();

    CompileShaders();
    glClearColor(1.0f, 1.0f, 0.0f, 1.0f);
   while (1)
   {
       RenderScene();
   }

    return 0;
}

数学3d.h：

#ifndef GLFWTest_math3d_h
#define GLFWTest_math3d_h

struct Vector3f
{
    float x;
    float y;
    float z;

    Vector3f()
    {
    }

    Vector3f(float _x, float _y, float _z)
    {
        x = _x;
        y = _y;
        z = _z;
    }
};
#endif

但什么都没有画出来，我只得到一个黄色的窗口。知道为什么会这样吗？我正在使用安装了 osx lion 的一年左右的 mac book pro

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0 回答 0