루빅스 큐브 만들기2

Posted by 백창
2014. 12. 8. 20:42 개발/Open GL
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 개요

 

 cube 객체를 생성하고 27개의 작은 정육면체로 큰 정육면체를 만들기



 간단한 설명

 

클래스를 작성하여 반복문으로 각 위치를 설정해주고 정육면체를 그린다.


생각나는데로 만들어서 노가다성 코드가 많음.







 좌표설정 및 칼라 설정

 

가장 간단한 노가다로 처리


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static GLfloat vertices[3][9][8][3] = {
    //Front
    {
        //Top
        {
            { -0.5, 0.5, 0.2 }, { -0.5, 0.5, 0.5 }, { -0.2, 0.5, 0.5 }, { -0.2, 0.5, 0.2 }, { -0.5, 0.2, 0.2 }, { -0.5, 0.2, 0.5 }, { -0.2, 0.2, 0.5 }, { -0.2, 0.2, 0.2 }
        },
        {
            { -0.15, 0.5, 0.2 }, { -0.15, 0.5, 0.5 }, { 0.15, 0.5, 0.5 }, { 0.15, 0.5, 0.2 }, { -0.15, 0.2, 0.2 }, { -0.15, 0.2, 0.5 }, { 0.15, 0.2, 0.5 }, { 0.15, 0.2, 0.2 }
        },
        {
            { 0.2, 0.5, 0.2 }, { 0.2, 0.5, 0.5 }, { 0.5, 0.5, 0.5 }, { 0.5, 0.5, 0.2 }, { 0.2, 0.2, 0.2 }, { 0.2, 0.2, 0.5 }, { 0.5, 0.2, 0.5 }, { 0.5, 0.2, 0.2 }
        },
            //Mid
        {
            { -0.5, 0.5, -0.15 }, { -0.5, 0.5, 0.15 }, { -0.2, 0.5, 0.15 }, { -0.2, 0.5, -0.15 }, { -0.5, 0.2, -0.15 }, { -0.5, 0.2, 0.15 }, { -0.2, 0.2, 0.15 }, { -0.2, 0.2, -0.15 }
        },
        {
            { -0.15, 0.5, -0.15 }, { -0.15, 0.5, 0.15 }, { 0.15, 0.5, 0.15 }, { 0.15, 0.5, -0.15 }, { -0.15, 0.2, -0.15 }, { -0.15, 0.2, 0.15 }, { 0.15, 0.2, 0.15 }, { 0.15, 0.2, -0.15 }
        },
        {
            { 0.2, 0.5, -0.15 }, { 0.2, 0.5, 0.15 }, { 0.5, 0.5, 0.15 }, { 0.5, 0.5, -0.15 }, { 0.2, 0.2, -0.15 }, { 0.2, 0.2, 0.15 }, { 0.5, 0.2, 0.15 }, { 0.5, 0.2, -0.15 }
        },
            //Bot
        {
            { -0.5, 0.5, -0.5 }, { -0.5, 0.5, -0.2 }, { -0.2, 0.5, -0.2 }, { -0.2, 0.5, -0.5 }, { -0.5, 0.2, -0.5 }, { -0.5, 0.2, -0.2 }, { -0.2, 0.2, -0.2 }, { -0.2, 0.2, -0.5 }
            
        },
        {
            { -0.15, 0.5, -0.5 }, { -0.15, 0.5, -0.2 }, { 0.15, 0.5, -0.2 }, { 0.15, 0.5, -0.5 }, { -0.15, 0.2, -0.5 }, { -0.15, 0.2, -0.2 }, { 0.15, 0.2, -0.2 }, { 0.15, 0.2, -0.5 }
        },
        {
            { 0.2, 0.5, -0.5 }, { 0.2, 0.5, -0.2 }, { 0.5, 0.5, -0.2 }, { 0.5, 0.5, -0.5 }, { 0.2, 0.2, -0.5 }, { 0.2, 0.2, -0.2 }, { 0.5, 0.2, -0.2 }, { 0.5, 0.2, -0.5 }
        }
    },
        //Middle
    {
        //Top
        {
            { -0.5, 0.15, 0.2 }, { -0.5, 0.15, 0.5 }, { -0.2, 0.15, 0.5 }, { -0.2, 0.15, 0.2 }, { -0.5, -0.15, 0.2 }, { -0.5, -0.15, 0.5 }, { -0.2, -0.15, 0.5 }, { -0.2, -0.15, 0.2 }
        },
        {
            { -0.15, 0.15, 0.2 }, { -0.15, 0.15, 0.5 }, { 0.15, 0.15, 0.5 }, { 0.15, 0.15, 0.2 }, { -0.15, -0.15, 0.2 }, { -0.15, -0.15, 0.5 }, { 0.15, -0.15, 0.5 }, { 0.15, -0.15, 0.2 }
        },
        {
            { 0.2, 0.15, 0.2 }, { 0.2, 0.15, 0.5 }, { 0.5, 0.15, 0.5 }, { 0.5, 0.15, 0.2 }, { 0.2, -0.15, 0.2 }, { 0.2, -0.15, 0.5 }, { 0.5, -0.15, 0.5 }, { 0.5, -0.15, 0.2 }
        },
            //Mid
        {
            { -0.5, 0.15, -0.15 }, { -0.5, 0.15, 0.15 }, { -0.2, 0.15, 0.15 }, { -0.2, 0.15, -0.15 }, { -0.5, -0.15, -0.15 }, { -0.5, -0.15, 0.15 }, { -0.2, -0.15, 0.15 }, { -0.2, -0.15, -0.15 }
        },
        { //Black One - Center Cube
            { -0.35, 0.35, -0.35 }, { -0.35, 0.35, 0.35 }, { 0.35, 0.35, 0.35 }, { 0.35, 0.35, -0.35 }, { -0.35, -0.35, -0.35 }, { -0.35, -0.35, 0.35 }, { 0.35, -0.35, 0.35 }, { 0.35, -0.35, -0.35 }
        },
        {
            { 0.2, 0.15, -0.15 }, { 0.2, 0.15, 0.15 }, { 0.5, 0.15, 0.15 }, { 0.5, 0.15, -0.15 }, { 0.2, -0.15, -0.15 }, { 0.2, -0.15, 0.15 }, { 0.5, -0.15, 0.15 }, { 0.5, -0.15, -0.15 }
        },
            //Bot
        {
            { -0.5, 0.15, -0.5 }, { -0.5, 0.15, -0.2 }, { -0.2, 0.15, -0.2 }, { -0.2, 0.15, -0.5 }, { -0.5, -0.15, -0.5 }, { -0.5, -0.15, -0.2 }, { -0.2, -0.15, -0.2 }, { -0.2, -0.15, -0.5 }
        },
        {
            { -0.15, 0.15, -0.5 }, { -0.15, 0.15, -0.2 }, { 0.15, 0.15, -0.2 }, { 0.15, 0.15, -0.5 }, { -0.15, -0.15, -0.5 }, { -0.15, -0.15, -0.2 }, { 0.15, -0.15, -0.2 }, { 0.15, -0.15, -0.5 }
        },
        {
            { 0.2, 0.15, -0.5 }, { 0.2, 0.15, -0.2 }, { 0.5, 0.15, -0.2 }, { 0.5, 0.15, -0.5 }, { 0.2, -0.15, -0.5 }, { 0.2, -0.15, -0.2 }, { 0.5, -0.15, -0.2 }, { 0.5, -0.15, -0.5 }
            
        }
    },
        //Back
    {
        //Top
        {
            { -0.5, -0.2, 0.2 }, { -0.5, -0.2, 0.5 }, { -0.2, -0.2, 0.5 }, { -0.2, -0.2, 0.2 }, { -0.5, -0.5, 0.2 }, { -0.5, -0.5, 0.5 }, { -0.2, -0.5, 0.5 }, { -0.2, -0.5, 0.2 }
        },
        {
            { -0.15, -0.2, 0.2 }, { -0.15, -0.2, 0.5 }, { 0.15, -0.2, 0.5 }, { 0.15, -0.2, 0.2 }, { -0.15, -0.5, 0.2 }, { -0.15, -0.5, 0.5 }, { 0.15, -0.5, 0.5 }, { 0.15, -0.5, 0.2 }
        },
        {
            { 0.2, -0.2, 0.2 }, { 0.2, -0.2, 0.5 }, { 0.5, -0.2, 0.5 }, { 0.5, -0.2, 0.2 }, { 0.2, -0.5, 0.2 }, { 0.2, -0.5, 0.5 }, { 0.5, -0.5, 0.5 }, { 0.5, -0.5, 0.2 }
        },
            //Mid
        {
            { -0.5, -0.2, -0.15 }, { -0.5, -0.2, 0.15 }, { -0.2, -0.2, 0.15 }, { -0.2, -0.2, -0.15 }, { -0.5, -0.5, -0.15 }, { -0.5, -0.5, 0.15 }, { -0.2, -0.5, 0.15 }, { -0.2, -0.5, -0.15 }
        },
        {
            { -0.15, -0.2, -0.15 }, { -0.15, -0.2, 0.15 }, { 0.15, -0.2, 0.15 }, { 0.15, -0.2, -0.15 }, { -0.15, -0.5, -0.15 }, { -0.15, -0.5, 0.15 }, { 0.15, -0.5, 0.15 }, { 0.15, -0.5, -0.15 }
        },
        {
            { 0.2, -0.2, -0.15 }, { 0.2, -0.2, 0.15 }, { 0.5, -0.2, 0.15 }, { 0.5, -0.2, -0.15 }, { 0.2, -0.5, -0.15 }, { 0.2, -0.5, 0.15 }, { 0.5, -0.5, 0.15 }, { 0.5, -0.5, -0.15 }
        },
 
            //Bot
        {
            { -0.5, -0.2, -0.5 }, { -0.5, -0.2, -0.2 }, { -0.2, -0.2, -0.2 }, { -0.2, -0.2, -0.5 }, { -0.5, -0.5, -0.5 }, { -0.5, -0.5, -0.2 }, { -0.2, -0.5, -0.2 }, { -0.2, -0.5, -0.5 }
        },
        {
            { -0.15, -0.2, -0.5 }, { -0.15, -0.2, -0.2 }, { 0.15, -0.2, -0.2 }, { 0.15, -0.2, -0.5 }, { -0.15, -0.5, -0.5 }, { -0.15, -0.5, -0.2 }, { 0.15, -0.5, -0.2 }, { 0.15, -0.5, -0.5 }
        },
        {
            { 0.2, -0.2, -0.5 }, { 0.2, -0.2, -0.2 }, { 0.5, -0.2, -0.2 }, { 0.5, -0.2, -0.5 }, { 0.2, -0.5, -0.5 }, { 0.2, -0.5, -0.2 }, { 0.5, -0.5, -0.2 }, { 0.5, -0.5, -0.5 }
            
        }
    }
};
 
GLfloat primary_colors[][3] = {
    { 1.0, 0.0, 0.0 },      // red  
    { 1.0, 1.0, 0.0 },      // yellow  
    { 0.0, 1.0, 0.0 },      // green  
    { 0.0, 0.0, 1.0 },      // blue  
    { 1.0, 1.0, 1.0 },      // gold
    { 1.0, 0.0, 1.0 }        // magenta  
};     




 클래스 생성

 

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class Cube{
private:
    GLfloat vertices[8][3];
    GLfloat colors[6][3];
    int location[3];
    
 
public:
    void setPosition(GLfloat set[8][3]);
 
    void setLocation(int loc[3]);
    void getLocation(int *ptr);
 
    void setColor(GLfloat set[6][3]);
    void getColor(GLfloat get[6][3]);
 
    void setAngle(int new_angleX, int new_angleY, int new_angleZ);
 
    void drawCube();
    void drawBlackCube();
        
};
 
 
void Cube::setColor(GLfloat set[6][3]){
    for (int i = 0; i<6; i++){
        for (int j = 0; j<3; j++){
            colors[i][j] = set[i][j];
        }
    }
}
 
 
void Cube::getColor(GLfloat get[6][3]){
    for (int i = 0; i < 6; i++){
        for (int j = 0; j < 3; j++){
            get[i][j] = colors[i][j];
        }
    }
}
 
/**
* Cube 위치 설정
*/
void Cube::setLocation(int loc[3]){
    for (int i = 0; i < 3; i++){
        location[i] = loc[i];
    }
}
 
/**
* Cube 위치 반환
*/
void Cube::getLocation(int *ptr){
    for (int i = 0; i < 3; i++){
        ptr[i] = location[i];
    }
 
}
 
/**
* Cube 위치 좌표 설정
*/
void Cube::setPosition(GLfloat set[8][3]){
    for (int i = 0; i < 8; i++){
        for (int j = 0; j < 3; j++){
            vertices[i][j] = set[i][j];
        }
    }
 
}
/**
* Cube 그리기
*/
void Cube::drawCube(){
    
    glBegin(GL_QUADS);
    
    glColor3fv(colors[0]);
    glNormal3f(0.0f, 1.0f, 0.0f);//top
    glVertex3fv(vertices[0]);
    glVertex3fv(vertices[3]);
    glVertex3fv(vertices[2]);
    glVertex3fv(vertices[1]);
    
    glColor3fv(colors[1]);
    glNormal3f(0.0f, 0.0f, 1.0f);//front
    glVertex3fv(vertices[1]);
    glVertex3fv(vertices[2]);
    glVertex3fv(vertices[6]);
    glVertex3fv(vertices[5]);
    
    glColor3fv(colors[2]);
    glNormal3f(1.0f, 0.0f, 0.0f);//right
    glVertex3fv(vertices[3]);
    glVertex3fv(vertices[7]);
    glVertex3fv(vertices[6]);
    glVertex3fv(vertices[2]);
    
    
    glColor3fv(colors[3]);
    glNormal3f(0.0f, 0.0f, -1.0f);//back
    glVertex3fv(vertices[0]);
    glVertex3fv(vertices[3]);
    glVertex3fv(vertices[7]);
    glVertex3fv(vertices[4]);
    
    glColor3fv(colors[4]);
    glNormal3f(0.0f, -1.0f, 0.0f);//buttom
    glVertex3fv(vertices[7]);
    glVertex3fv(vertices[4]);
    glVertex3fv(vertices[5]);
    glVertex3fv(vertices[6]);
    
    glColor3fv(colors[5]);
    glNormal3f(-1.0f, 0.0f, 0.0f);//left 
    glVertex3fv(vertices[4]);
    glVertex3fv(vertices[0]);
    glVertex3fv(vertices[1]);
    glVertex3fv(vertices[5]);
    
    glEnd();            // End Drawing The Cube
}
/**
* Center Cube 그리기
*/
void Cube::drawBlackCube(){
 
    glBegin(GL_QUADS);
    glColor3f(0.5f, 0.5f, 0.5f);
    glVertex3fv(vertices[0]);
    glVertex3fv(vertices[3]);
    glVertex3fv(vertices[2]);
    glVertex3fv(vertices[1]);
 
    glColor3f(0.5f, 0.5f, 0.5f);
    glVertex3fv(vertices[1]);
    glVertex3fv(vertices[2]);
    glVertex3fv(vertices[6]);
    glVertex3fv(vertices[5]);
 
    glColor3f(0.5f, 0.5f, 0.5f);
    glVertex3fv(vertices[3]);
    glVertex3fv(vertices[7]);
    glVertex3fv(vertices[6]);
    glVertex3fv(vertices[2]);
 
    glColor3f(0.5f, 0.5f, 0.5f);
    glVertex3fv(vertices[0]);
    glVertex3fv(vertices[3]);
    glVertex3fv(vertices[7]);
    glVertex3fv(vertices[4]);
 
    glColor3f(0.5f, 0.5f, 0.5f);
    glVertex3fv(vertices[7]);
    glVertex3fv(vertices[4]);
    glVertex3fv(vertices[5]);
    glVertex3fv(vertices[6]);
 
    glColor3f(0.5f, 0.5f, 0.5f);
    glVertex3fv(vertices[4]);
    glVertex3fv(vertices[0]);
    glVertex3fv(vertices[1]);
    glVertex3fv(vertices[5]);
 
    glEnd();            // End Drawing The Cube
}




 Display Func

 

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void setAllCube(){
 
    /**************** 큐브 초기 좌표 설정 *****************/
    for (int i = 0; i < 3; i++){
        for (int j = 0; j < 9; j++){
            cube[i][j].setPosition(vertices[i][j]);
            cube[i][j].setLocation(primaryLocation[i][j]);
            cube[i][j].setColor(primary_colors);
        }
    }
}
 
void drawAllCube(){
 
    for (int a = 0; a < 3; a++){
        for (int b = 0; b < 9; b++){
 
            for (int i = 0; i < 3; i++){
                for (int j = 0; j < 9; j++){
 
                    int save[3];
                    int cnt = 0;
 
                    cube[i][j].getLocation(save);
                    
                    //위치에 맞는 큐브를 선택
                    for (int k = 0; k < 3; k++){
                        if (primaryLocation[a][b][k] == save[k]){
                            cnt++;
                        }
                    }
                    if (cnt == 3){
 
                        glPushMatrix();
                        if (i == 1 && j == 4)
                            cube[i][j].drawBlackCube();
                        else
                            cube[i][j].drawCube();
 
                        glPopMatrix();
                    }
                }
            }
        }
    }
 
    
}
 
 
void Init(){
 
    glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
    glutInitWindowSize(700, 700);
    glutInitWindowPosition(0, 0);
 
 
    glutCreateWindow("Rubik\'s Cube");
 
 
//    glClearColor(1.0, 1.0, 1.0, 0.0);
    glClearColor(0.0, 0.0, 0.0, 0.0);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
 
    glEnable(GL_DEPTH_TEST);
 
    setAllCube();
}
 
 
void MyDisplay(){
    
    
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
 
    glPopMatrix();
    glRotatef(g_fSpinY, 1.0f, 0.0f, 0.0f);
    glRotatef(g_fSpinX, 0.0f, 0.0f, 1.0f);
 
    drawAllCube();
 
    glPopMatrix(); 
    glutSwapBuffers();
    glFlush();
    
}
 


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루빅스 큐브 만들기1

Posted by 백창
2014. 11. 22. 15:03 개발/Open GL
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 개요

 

 Open GL을 사용하여 어릴때 가지고 놀던 장난감, 루빅스 큐브를 만들어 보도록 하자.




 설계

 

 각각의 정육면체를 Class로 생성, 각각의 객체에 3차원 좌표와 각 면의 색깔을 지정해준다.


 그리고 회전하고자 하는 면의 좌표를 선택하여 아래와 같은 규칙을 따라 회전 시킨다. 


(나는 좌표 값을 사용하지 않고 각 객체가 위치한 좌표를 식별하기 편하게 1 , 2 , 3 으로 주었다.)


(반대 방향으로 회전하고자 하는 경우 규칙을 반대로 적용하면 된다.)




단면을 봤을 때 위와 같은 규칙으로 회전하고 전체적인 그림을 봤을때 색깔의 변경은 아래와 같다.



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정육면체 그리기

Posted by 백창
2014. 11. 21. 10:56 개발/Open GL
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 개요

 

 사각형을 이용해 정육면체 즉, 큐브를 그려보자



 코드

 

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#include <gl/glut.h>
 
GLfloat vertices[][3] = {
    { -0.5, 0.5, -0.5 }, 
    { -0.5, 0.5, 0.5 }, 
    { 0.5, 0.5, 0.5 }, 
    { 0.5, 0.5, -0.5 }, 
    { -0.5, -0.5, -0.5 }, 
    { -0.5, -0.5, 0.5 }, 
    { 0.5, -0.5, 0.5 }, 
    { 0.5, -0.5, -0.5 }
};
 
GLfloat colors[][3] = {
    { 1.0, 0.0, 0.0 },      // red  
    { 1.0, 1.0, 0.0 },      // yellow  
    { 0.0, 1.0, 0.0 },      // green  
    { 0.0, 0.0, 1.0 },      // blue  
    { 0.5, 0.5, 0.0 },      // gold
    { 1.0, 0.0, 1.0 }        // magenta  
};
 
 
void display(){
 
 
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
    glTranslatef(0.0f, 0.0f, 0.0f);
    glRotatef(30, 1.0f, 0.0f, 0.0f);
    glRotatef(30, 0.0f, 0.0f, 1.0f);
 
    glBegin(GL_QUADS);
 
    glColor3fv(colors[0]);
    glVertex3fv(vertices[0]);
    glVertex3fv(vertices[3]);
    glVertex3fv(vertices[2]);
    glVertex3fv(vertices[1]);
 
    glColor3fv(colors[1]);
    glVertex3fv(vertices[1]);
    glVertex3fv(vertices[2]);
    glVertex3fv(vertices[6]);
    glVertex3fv(vertices[5]);
 
    glColor3fv(colors[2]);
    glVertex3fv(vertices[3]);
    glVertex3fv(vertices[7]);
    glVertex3fv(vertices[6]);
    glVertex3fv(vertices[2]);
 
    glColor3fv(colors[3]);
    glVertex3fv(vertices[0]);
    glVertex3fv(vertices[3]);
    glVertex3fv(vertices[7]);
    glVertex3fv(vertices[4]);
 
    glColor3fv(colors[4]);
    glVertex3fv(vertices[7]);
    glVertex3fv(vertices[4]);
    glVertex3fv(vertices[5]);
    glVertex3fv(vertices[6]);
 
    glColor3fv(colors[5]);
    glVertex3fv(vertices[4]);
    glVertex3fv(vertices[0]);
    glVertex3fv(vertices[1]);
    glVertex3fv(vertices[5]);
 
    glEnd();            // End Drawing The Cube
 
    glutSwapBuffers();
}
 
 
void Init(){
 
    glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
    glutInitWindowSize(700, 700);
    glutInitWindowPosition(0, 0);
 
    glutCreateWindow("Cube");
 
    glClearColor(1.0, 1.0, 1.0, 1.0);
 
    glEnable(GL_DEPTH_TEST);
 
}
 
int main(int argc, char **argv){
    glutInit(&argc, argv);
 
    Init();
 
    glutDisplayFunc(display);
    glutMainLoop();
 
    return 0;
}



 결과

 




 참고

 

 glEnable(GL_DEPTH_TEST) 를 사용하지 않으면 어떤 도형이 화면과 가까운지 체크할 수 없어 앞면과 뒷면이 구분되지 않는 문제가 발생한다.

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