opengl绘制贝塞尔曲面代码

我可以回答这个问题。以下是一个OpenGL绘制贝塞尔曲面的代码示例：

void drawBezierSurface(float controlPoints[][3], int numU, int numV) {
    float u, v;
    int i, j;
    float x, y, z;
    float u1, v1, u2, v2;
    float stepU = 1.0f / (numU - 1);
    float stepV = 1.0f / (numV - 1);
    
    for (i = 0; i < numU - 1; i++) {
        for (j = 0; j < numV - 1; j++) {
            glBegin(GL_QUADS);
            for (u = i * stepU; u <= (i + 1) * stepU; u += stepU) {
                for (v = j * stepV; v <= (j + 1) * stepV; v += stepV) {
                    u1 = 1 - u;
                    v1 = 1 - v;
                    u2 = u * u;
                    v2 = v * v;
                    x = controlPoints[i][0] * u1 * v1 + controlPoints[i + 1][0] * u2 * v1 + controlPoints[i][0] * u1 * v2 + controlPoints[i + 1][0] * u2 * v2;
                    y = controlPoints[i][1] * u1 * v1 + controlPoints[i + 1][1] * u2 * v1 + controlPoints[i][1] * u1 * v2 + controlPoints[i + 1][1] * u2 * v2;
                    z = controlPoints[i][2] * u1 * v1 + controlPoints[i + 1][2] * u2 * v1 + controlPoints[i][2] * u1 * v2 + controlPoints[i + 1][2] * u2 * v2;
                    glVertex3f(x, y, z);
                }
            }
            glEnd();
        }
    }
}

这个函数接受一个二维数组作为控制点，以及曲面的细分数。它使用OpenGL的GL_QUADS模式绘制曲面。