在openGL中：如何在平面上移动对象（立方体）并保持曲面静止？ #包括 #包括 GLfloat顶点[][3]={ {0.0,0.0,0.0},{0.0,0.4,0.0},{0.4,0.4,0.0},{0.4,0.0,0.0} }; GLfloat color[2][3]={{1.0,0.0,0.0}，{0.0,1.0,0.0}； 无效董事会（） { GL3F（0.0,0.0,1.0）； glBegin（GL_线_环）； glVertex3f（-0.8，-0.8,0.0）； glVertex3f（-0.8,0.80,0.0）； glVertex3f（0.80,0.80,0.0）； glVertex3f（0.8，-0.80,0.0）； 格伦德（）； } void立方体（） { glBegin（GL_线_环）； GL3F（1.0,0.0,0.0）； glVertex3fv（顶点[0]）； glVertex3fv（顶点[1]）； glVertex3fv（顶点[2]）； glVertex3fv（顶点[3]）； 格伦德（）； } 无效显示（） { glClearColor（1.0,1.0,1.0,1.0）； 政府统计处(0,0600600),； glClear（GL_颜色_缓冲_位| GL_深度_缓冲_位）； 立方体（）； 董事会（）； glFlush（）； } void mykey（int key，int x，int y） { 开关（钥匙）{ 案例过量键左：GLTRANSTEF（-0.4,0.0,0.0）；中断； 案例过量键右：GLTRANSTEF（0.4,0.0,0.0）；中断； 案例过量键：GLTRANSTEF（0.0,0.4,0.0）；中断； 案例过量键向下：GLTRANSTEF（0.0，-0.3,0.0）；中断； } 再发现（）； } void myinit（） { glMatrixMode（GL_投影）； glLoadIdentity（）； 格洛托（02000400，-1,1）； glMatrixMode（GLU模型视图）； } int main（int argc，字符**argv） { glutInit（&argc，argv）； glutInitDisplayMode（GLUT_单个| GLUT_RGB | GLUT_深度）； glutInitWindowSize（600600）； “你好”； glutDisplayFunc（显示器）； glutSpecialFunc（mykey）； glutMainLoop（）； 返回0； }

OpenGL是一种绘图API，而不是场景渲染器。你想改变什么吗？然后你必须重新画出整件事

#include<gl/glut.h>
#include<stdio.h>

GLfloat vertices[][3]={
{0.0,0.0,0.0},{0.0,0.4,0.0},{0.4,0.4,0.0},{0.4,0.0,0.0} };

GLfloat color[2][3]={ {1.0,0.0,0.0},{0.0,1.0,0.0}};

void board()
{
    glColor3f(0.0,0.0,1.0);
    glBegin(GL_LINE_LOOP);
        glVertex3f(-0.8,-0.8,0.0);
        glVertex3f(-0.8,0.80,0.0);
        glVertex3f(0.80,0.80,0.0);
        glVertex3f(0.8,-0.80,0.0);
    glEnd();
}

void cube() 
{
    glBegin(GL_LINE_LOOP);
        glColor3f(1.0,0.0,0.0);
        glVertex3fv(vertices[0]);
        glVertex3fv(vertices[1]);
        glVertex3fv(vertices[2]);
        glVertex3fv(vertices[3]);
    glEnd();    
}

void display()
{
    glClearColor(1.0,1.0,1.0,1.0);
    glViewport(0,0,600,600);
    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    cube();
    board();

    glFlush();
}

void mykey(int key,int x,int y)
{
    switch(key){
        case GLUT_KEY_LEFT:  glTranslatef(-0.4,0.0,0.0); break;        
        case GLUT_KEY_RIGHT: glTranslatef(0.4,0.0,0.0);  break;
        case GLUT_KEY_UP:    glTranslatef(0.0,0.4,0.0);  break;
        case GLUT_KEY_DOWN:  glTranslatef(0.0,-0.3,0.0); break;
    }

    glutPostRedisplay();
}


void myinit()
{
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    glOrtho(0,200,0,400,-1,1);
    glMatrixMode(GL_MODELVIEW);
}

int main(int argc,char **argv)
{
    glutInit(&argc,argv);
    glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB|GLUT_DEPTH);
    glutInitWindowSize(600,600);
    glutCreateWindow("hello");
    glutDisplayFunc(display);
    glutSpecialFunc(mykey);
    glutMainLoop();

    return 0;
}