5. Text

invalid-file

 

< 텍스트 출력 >



import javax.media.opengl.*;
import javax.media.opengl.glu.*;
import com.sun.opengl.util.*;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Test extends JFrame{
    public Test(){
        this.setSize(400, 300);
        this.setTitle("Test1");

        GLCapabilities    glCaps=    new GLCapabilities();
        glCaps.setRedBits(8);
        glCaps.setBlueBits(8);
        glCaps.setGreenBits(8);
        glCaps.setAlphaBits(8);

        GLCanvas canvas=    new GLCanvas(glCaps);
        
        canvas.addGLEventListener(new TestRenderer());
        
        this.add(canvas);
        this.addWindowListener(new WindowAdapter(){
            public void windowClosing(WindowEvent we){
                System.exit(0);
            }
        });

        Animator anim=  new Animator(canvas);   //에니메이션 등록
         anim.start();                           //에니메이션 시작(GLEventListener 의 display(...) 지속적인 호출)
    }

    public static void main(String args[]){
        Test test=    new Test();
        test.setVisible(true);
    }
};

class TestRenderer implements GLEventListener{
    private GL          gl;
    private GLU         glu=    new GLU();
    private GLUT        glut=   new GLUT();

    //########################################################################################
    //# GLEventListener 클래스의 추상 메소드
    //########################################################################################
    public void display(GLAutoDrawable drawable){
        gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
        gl.glLoadIdentity();

        gl.glRasterPos2f(0.0f, 0.0f);                               // (0, 0)은 좌측 상단
         glut.glutBitmapString(GLUT.BITMAP_8_BY_13, "Hello~~ ");
    }

    //########################################################################################
    //# GLEventListener 클래스의 추상 메소드
    //########################################################################################
    public void displayChanged(GLAutoDrawable drawable, boolean modeChanged, boolean deviceChanged){

    }

    //########################################################################################
    //# GLEventListener 클래스의 추상 메소드
    //########################################################################################
    public void init(GLAutoDrawable drawable){
        gl=            drawable.getGL();

        gl.glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
    }

    //########################################################################################
    //# GLEventListener 클래스의 추상 메소드
    //########################################################################################
    public void reshape(GLAutoDrawable drawable, int x, int y, int w, int h){
        gl.glMatrixMode(GL.GL_PROJECTION);
        gl.glLoadIdentity();

        gl.glViewport(0, -10, w, h);                                    //-10은 제목표시줄 두께
         glu.gluOrtho2D(0, drawable.getWidth(), drawable.getHeight(), 0);

        gl.glMatrixMode(GL.GL_MODELVIEW);
        gl.glLoadIdentity();
    }
};

//########################################################################################
//# com.sun.opengl.util.Animator 클래스는 최상위 클래스로 Object클래스를 둔다.
//# GLEventListener 클래스의 display(...) 함수를 지속적으로 호출한다.
//#
//# gluOrtho2D(...)를 사용하여, World를 2차원으로 설정했다.
//# 그러면 glRasterPos2f(...)을 이용하여 화면의 정확한 위치(2차원의 위치)에 출력할 수 있다.
//# ,
//# 만약, gluPerspective(...)등을 사용한다면, 화면의 중앙이 원점이 된다.
//# 그리고 glRasterPos3f(...)을 이용하여 z축 값도 추가해 준다.
//# 이 경우, 출력 위치는 화면 좌표계가 아니라, OpenGL 좌표계를 따르게 된다.
//########################################################################################