glbegin 不在 OpenGL 3.3 核心中绘制

Question

我需要绘制一个立方体来指示 OpenGL 3.3 核心中的坐标 profile.It 在没有 glutInitContextVersion (3, 3); 的情况下工作正常，但在应用 glutInitContextVersion (3, 3); 时它会变成全黑。下面是绘图代码。

void display() {
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // Clear color and depth buffers
glMatrixMode(GL_MODELVIEW);     // To operate on model-view matrix

// Render a color-cube consisting of 6 quads with different colors
glLoadIdentity();                 // Reset the model-view matrix
glTranslatef(1.5f, 0.0f, -7.0f);  // Move right and into the screen

glBegin(GL_QUADS);                // Begin drawing the color cube with 6 quads
  // Top face (y = 1.0f)
  // Define vertices in counter-clockwise (CCW) order with normal pointing out
  glColor3f(0.0f, 1.0f, 0.0f);     // Green
  glVertex3f( 1.0f, 1.0f, -1.0f);
  glVertex3f(-1.0f, 1.0f, -1.0f);
  glVertex3f(-1.0f, 1.0f,  1.0f);
  glVertex3f( 1.0f, 1.0f,  1.0f);

  // Bottom face (y = -1.0f)
  glColor3f(1.0f, 0.5f, 0.0f);     // Orange
  glVertex3f( 1.0f, -1.0f,  1.0f);
  glVertex3f(-1.0f, -1.0f,  1.0f);
  glVertex3f(-1.0f, -1.0f, -1.0f);
  glVertex3f( 1.0f, -1.0f, -1.0f);

  // Front face  (z = 1.0f)
  glColor3f(1.0f, 0.0f, 0.0f);     // Red
  glVertex3f( 1.0f,  1.0f, 1.0f);
  glVertex3f(-1.0f,  1.0f, 1.0f);
  glVertex3f(-1.0f, -1.0f, 1.0f);
  glVertex3f( 1.0f, -1.0f, 1.0f);

  // Back face (z = -1.0f)
  glColor3f(1.0f, 1.0f, 0.0f);     // Yellow
  glVertex3f( 1.0f, -1.0f, -1.0f);
  glVertex3f(-1.0f, -1.0f, -1.0f);
  glVertex3f(-1.0f,  1.0f, -1.0f);
  glVertex3f( 1.0f,  1.0f, -1.0f);

  // Left face (x = -1.0f)
  glColor3f(0.0f, 0.0f, 1.0f);     // Blue
  glVertex3f(-1.0f,  1.0f,  1.0f);
  glVertex3f(-1.0f,  1.0f, -1.0f);
  glVertex3f(-1.0f, -1.0f, -1.0f);
  glVertex3f(-1.0f, -1.0f,  1.0f);

  // Right face (x = 1.0f)
  glColor3f(1.0f, 0.0f, 1.0f);     // Magenta
  glVertex3f(1.0f,  1.0f, -1.0f);
  glVertex3f(1.0f,  1.0f,  1.0f);
  glVertex3f(1.0f, -1.0f,  1.0f);
  glVertex3f(1.0f, -1.0f, -1.0f);
glEnd();  // End of drawing color-cube


glutSwapBuffers();  // Swap the front and back frame buffers (double buffering)
}

这是main函数中的代码：

int main(int argc, char** argv) {
glutInit(&argc, argv);            // Initialize GLUT
glutInitDisplayMode(GLUT_DEPTH | GLUT_DOUBLE | GLUT_RGBA); // Enable double buffered mode
glutInitContextVersion (3, 3);
glutInitWindowSize(640, 480);   // Set the window's initial width & height
glutInitWindowPosition(50, 50); // Position the window's initial top-left corner
glutCreateWindow(title);          // Create window with the given title
glutDisplayFunc(display);       // Register callback handler for window re-paint event
glutReshapeFunc(reshape);       // Register callback handler for window re-size event
initGL();                       // Our own OpenGL initialization
glutMainLoop();                 // Enter the infinite event-processing loop
return 0;
}

如何在 OpenGL 3.3 核心配置文件中绘制立方体？

Answer 1

Core Profile 中不存在固定函数管道（glVertex、glBegin 等）。

Answer 2

glBegin 和朋友已弃用并从较新版本（3.2 起）中删除。

相反，您需要将顶点数据上传到顶点缓冲区对象。然后使用 glVertexAttribPointer 告诉 openGL 数据是如何布局的。

此外，您还需要编写着色器。

glbegin 不在 OpenGL 3.3 核心中绘制

glbegin doesn't draw in OpenGL 3.3 core

opengl