#include <GL/glut.h>
#pragma comment(linker,"/subsystem:\"windows\" /entry:\"mainCRTStartup\"")

GLfloat yRot = 0;

//用來畫一個座標軸的函式
void axis(double length)
{
    glColor3f(1.0f, 1.0f, 1.0f);
    glPushMatrix();
    glBegin(GL_LINES);
    glVertex3d(0.0, 0.0, 0.0);
    glVertex3d(0.0, 0.0, length);
    glEnd();
    
 
//將當前操作點移到指定位置
    glTranslated(0.0, 0.0, length - 0.2);
    glColor3f(1.0, 0.0, 0.0);
    glutWireCone(0.04, 0.3, 8, 8);
    glPopMatrix();
}
void paint(void)
{
    glClear(GL_COLOR_BUFFER_BIT);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();

    glOrtho(-2.0, 2.0, -2.0, 2.0, -100, 100);
    glPointSize(1);
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
    gluLookAt(
 
1.3, 1.6, 2.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0);

    //畫座標系
    axis(2);

    glPushMatrix();
    glRotated(90.0, 0, 1.0, 0);//繞y軸正方向旋轉90度
    axis(2);
    glPopMatrix();

    glPushMatrix();
    glRotated(-90.0, 1.0, 0.0, 0.0);//繞x軸負方向旋轉
    axis(2);
    glPopMatrix();

    glPushMatrix();//旋轉除座標軸之外的物體
    glRotated(yRot, 0.0, yRot, 0.0
 
);
    glPushMatrix();
    glColor3f(0.0f, 0.0f, 1.0f);
    glTranslated(0.125, 0.125, 0.125);
    glutWireCube(0.25);
    glPopMatrix();

    glPushMatrix();
    glTranslated(1.125,0.125,0.125);
    glutWireTeapot(0.25);
    glPopMatrix();

    glPushMatrix();
    glTranslated(0.125, 0.125, 1.125);
    glutWireSphere(0.25, 12, 8);
    glPopMatrix();

    glPushMatrix();
    glTranslated(1.125,0.125,1.125);
    glRotated(-90, 1.0, 0.0, 0.0);
    glutWireTorus(0.1, 0.25, 12, 12);
    glPopMatrix();

    glPushMatrix();
    glTranslated(0.125, 1.125, 0.125);
    glScaled(0.5*0.25, 0.5*0.25, 0.5*0.25);
    glRotated(-90, 0.0, 0.0, 1.0);
    glutWireDodecahedron();
    glPopMatrix();

    glPushMatrix();
    glTranslated(0.0, 1.0, 1.0);
    GLUquadricObj * quadricObj = gluNewQuadric();
    gluQuadricDrawStyle(quadricObj, GLU_LINE);
    gluCylinder(quadricObj, 0.2, 0.2, 0.3, 6, 6);
    glRotated(-90, 0.0, 0.0, 0.0);
    glPopMatrix();

    glPopMatrix();//用來整體繞y軸旋轉
    glutSwapBuffers();
}
void Init()
{
    glClearColor(0.8,0.8,0.8,1.0);
}
void reshape(int w, int h)
{
    glViewport(0, 0, (GLsizei)w, (GLsizei)h);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    gluPerspective(60.0, (GLfloat)w / (GLfloat)h, 1.0, 20.0);
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
    gluLookAt(1.3, 1.6, 5.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0);
}
void SpecialKeys(int key, int x, int y)
{
    if (key == GLUT_KEY_LEFT)
        yRot -= 5.0f;

    if (key == GLUT_KEY_RIGHT)
        yRot += 5.0f;

    if (key> 356.0f)
        yRot = 0.0f;

    if (key< -1.0f)
        yRot = 355.0f;
    glutPostRedisplay();
}
int main(int argv, char *argc[])
{
    glutInit(&argv, argc);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE);
    glutInitWindowSize(400, 400);
    glutInitWindowPosition(400, 300);
    glutCreateWindow("3D空間繪製各種系統自帶立方體");
    Init();
    glutDisplayFunc(paint);
    glutReshapeFunc(reshape);
    glutSpecialFunc(SpecialKeys);
    glutMainLoop();
}