JOGL學習（3）—— 旋轉彩色立方體

• 參考鏈接：https://iowiki.com/jogl/jogl_3d_cube.html

package t1;


//旋轉立方體

import java.awt.DisplayMode;
import com.jogamp.opengl.GL2;
import com.jogamp.opengl.GLAutoDrawable;
import com.jogamp.opengl.GLCapabilities;
import com.jogamp.opengl.GLEventListener;
import com.jogamp.opengl.GLProfile;
import com.jogamp.opengl.awt.GLCanvas;
import com.jogamp.opengl.glu.GLU;
import javax.swing.JFrame;
import com.jogamp.opengl.util.FPSAnimator;

public class T5 implements GLEventListener {
	public static DisplayMode dm, dm_old;
	private GLU glu = new GLU();
	private float rquad = 3.0f;

	@Override
	public void display(GLAutoDrawable drawable) {
		final GL2 gl = drawable.getGL().getGL2();
		gl.glClear(GL2.GL_COLOR_BUFFER_BIT | GL2.GL_DEPTH_BUFFER_BIT);
		gl.glLoadIdentity();
		//出現在屏幕中的位置，
		gl.glTranslatef(0f, 0f, -10.0f);
		// Rotate The Cube On X, Y & Z 沿着哪個點旋轉
		gl.glRotatef(rquad, 1.0f, 1.0f, 1.0f); 
		// giving different colors to different sides
		gl.glBegin(GL2.GL_QUADS); // Start Drawing The Cube
		gl.glColor3f(1f, 0f, 0f); // red color  紅色面
		gl.glVertex3f(1.0f, 1.0f, -1.0f); // Top Right Of The Quad (Top)
		gl.glVertex3f(-1.0f, 1.0f, -1.0f); // Top Left Of The Quad (Top)
		gl.glVertex3f(-1.0f, 1.0f, 1.0f); // Bottom Left Of The Quad (Top)
		gl.glVertex3f(1.0f, 1.0f, 1.0f); // Bottom Right Of The Quad (Top)
		gl.glColor3f(0f, 1f, 0f); // green color  綠色面
		gl.glVertex3f(1.0f, -1.0f, 1.0f); // Top Right Of The Quad
		gl.glVertex3f(-1.0f, -1.0f, 1.0f); // Top Left Of The Quad
		gl.glVertex3f(-1.0f, -1.0f, -1.0f); // Bottom Left Of The Quad
		gl.glVertex3f(1.0f, -1.0f, -1.0f); // Bottom Right Of The Quad
		gl.glColor3f(0f, 0f, 1f); // blue color  藍色面
		gl.glVertex3f(1.0f, 1.0f, 1.0f); // Top Right Of The Quad (Front)
		gl.glVertex3f(-1.0f, 1.0f, 1.0f); // Top Left Of The Quad (Front)
		gl.glVertex3f(-1.0f, -1.0f, 1.0f); // Bottom Left Of The Quad
		gl.glVertex3f(1.0f, -1.0f, 1.0f); // Bottom Right Of The Quad
		gl.glColor3f(1f, 1f, 0f); // yellow (red + green) 黃色面
		gl.glVertex3f(1.0f, -1.0f, -1.0f); // Bottom Left Of The Quad
		gl.glVertex3f(-1.0f, -1.0f, -1.0f); // Bottom Right Of The Quad
		gl.glVertex3f(-1.0f, 1.0f, -1.0f); // Top Right Of The Quad (Back)
		gl.glVertex3f(1.0f, 1.0f, -1.0f); // Top Left Of The Quad (Back)
		gl.glColor3f(1f, 0f, 1f); // purple (red + green) 紫色面
		gl.glVertex3f(-1.0f, 1.0f, 1.0f); // Top Right Of The Quad (Left)
		gl.glVertex3f(-1.0f, 1.0f, -1.0f); // Top Left Of The Quad (Left)
		gl.glVertex3f(-1.0f, -1.0f, -1.0f); // Bottom Left Of The Quad
		gl.glVertex3f(-1.0f, -1.0f, 1.0f); // Bottom Right Of The Quad
		gl.glColor3f(0f, 1f, 1f); // sky blue (blue +green) 天空色面
		gl.glVertex3f(1.0f, 1.0f, -1.0f); // Top Right Of The Quad (Right)
		gl.glVertex3f(1.0f, 1.0f, 1.0f); // Top Left Of The Quad
		gl.glVertex3f(1.0f, -1.0f, 1.0f); // Bottom Left Of The Quad
		gl.glVertex3f(1.0f, -1.0f, -1.0f); // Bottom Right Of The Quad
		gl.glEnd(); // Done Drawing The Quad
		gl.glFlush();
		rquad -= 3.15f;
	}

	@Override
	public void dispose(GLAutoDrawable drawable) {
		// TODO Auto-generated method stub
	}

	@Override
	public void init(GLAutoDrawable drawable) {
		final GL2 gl = drawable.getGL().getGL2();
		gl.glShadeModel(GL2.GL_SMOOTH);
		gl.glClearColor(0f, 0f, 0f, 0f);
		gl.glClearDepth(1.0f);
		gl.glEnable(GL2.GL_DEPTH_TEST);
		gl.glDepthFunc(GL2.GL_LEQUAL);
		gl.glHint(GL2.GL_PERSPECTIVE_CORRECTION_HINT, GL2.GL_NICEST);
	}

	@Override
   public void reshape( GLAutoDrawable drawable, int x, int y, int width, int height ) {
      // TODO Auto-generated method stub
      final GL2 gl = drawable.getGL().getGL2();
      if( height == 0 )
         height = 1;
      final float h = ( float ) width/( float ) height;
      gl.glViewport( 0, 0, width, height );
      gl.glMatrixMode( GL2.GL_PROJECTION );
      gl.glLoadIdentity();
      glu.gluPerspective( 45.0f, h, 1.0, 20.0 );
      gl.glMatrixMode( GL2.GL_MODELVIEW );
      gl.glLoadIdentity();
   }
	
	public void starting() {
		final GLProfile profile = GLProfile.get(GLProfile.GL2);
		GLCapabilities capabilities = new GLCapabilities(profile);
		capabilities.setDoubleBuffered(true);
		// The canvas
		final GLCanvas glcanvas = new GLCanvas(capabilities);
		
		glcanvas.addGLEventListener(this);
		glcanvas.setSize(1200, 1200);
		final JFrame frame = new JFrame(" Multicolored cube");
		frame.getContentPane().add(glcanvas);
		frame.setSize(frame.getContentPane().getPreferredSize());
		frame.setVisible(true);
		final FPSAnimator animator = new FPSAnimator(glcanvas, 300, true);
		animator.start();
	}

	public static void main(String[] args) {
		
		T5 cube = new T5();
		cube.starting();
		
	}
}