似乎无法获得GLFW/OpenGL深度测试工作

Question

我无法在任何项目中使用代码块来使用GLFW进行深度测试，即使使用代码块在开始新项目时提供的默认模板，如下所示。

任何帮助非常感谢，因为我知道我一定在做错事，但我一直没能找到它。

#include <GL/glfw.h> 

int main() 
{ 
int  width, height; 
int  frame = 0; 
bool running = true; 

glfwInit(); 

if(!glfwOpenWindow(512, 512, 0, 0, 0, 0, 0, 0, GLFW_WINDOW)) 
{ 
    glfwTerminate(); 
    return 0; 
} 

glfwSetWindowTitle("GLFW Application"); 

glEnable(GL_DEPTH_TEST); 

while(running) 
{ 
    frame++; 

    glfwGetWindowSize(&width, &height); 
    height = height > 0 ? height : 1; 

    glViewport(0, 0, width, height); 

    glClearColor(0.0f, 0.0f, 0.0f, 0.0f); 
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); 

    glMatrixMode(GL_PROJECTION); 
    glLoadIdentity(); 
    gluPerspective(65.0f, (GLfloat)width/(GLfloat)height, 1.0f, 100.0f); 

    // Draw some rotating garbage 
    glMatrixMode(GL_MODELVIEW); 
    glLoadIdentity(); 
    gluLookAt(0.0f, -10.0f, 0.0f, 
      0.0f, 0.0f, 0.0f, 
      0.0f, 0.0f, 1.0f); 

    //glTranslatef(1.0f, 1.0f, 0.0f); 
    glRotatef(frame, 0.25f, 1.0f, 0.75f); 
    glBegin(GL_TRIANGLES); 
     glColor3f(0.1f, 0.0f, 0.0f); 
     glVertex3f(0.0f, 3.0f, -4.0f); 
     glColor3f(0.0f, 1.0f, 0.0f); 
     glVertex3f(3.0f, -2.0f, -4.0f); 
     glColor3f(0.0f, 0.0f, 1.0f); 
     glVertex3f(-3.0f, -2.0f, -4.0f); 
    glEnd(); 
    glBegin(GL_TRIANGLES); 
     glColor3f(0.0f, 0.1f, 0.0f); 
     glVertex3f(0.0f, 3.0f, -3.0f); 
     glColor3f(0.0f, 0.0f, 1.0f); 
     glVertex3f(3.0f, -2.0f, -2.0f); 
     glColor3f(1.0f, 0.0f, 0.0f); 
     glVertex3f(-3.0f, -2.0f, 2.0f); 
    glEnd(); 
    glfwSwapBuffers(); 

    // exit if ESC was pressed or window was closed 
    running = !glfwGetKey(GLFW_KEY_ESC) && glfwGetWindowParam(GLFW_OPENED); 
} 

glfwTerminate(); 

return 0; 

}

Answer 1

从GLFW2 documentation（重点煤矿）：

int glfwOpenWindow 
    (
    int width, int height, 
    int redbits, int greenbits, int bluebits, 
    int alphabits, 
    int depthbits, 
    int stencilbits, 
    int mode 
    ) 

depthbits：要使用的深度缓冲（0位的数目表示没有深度缓冲）。

并且代码：

glfwOpenWindow(512, 512, 0, 0, 0, 0, 0, 0, GLFW_WINDOW) 
            ^no depth bits 

你不能（有效），使用深度缓冲，没有任何深度位。