JOGL 3D基本形状

在3D物体中，z 轴也与 x 轴和 y 轴同时存在。这些轴表示对象的高度、宽度和深度。因此，它代表了对象的真实视图。

JOGL 3D 示例

在这个例子中，我们正在创建一个简单的 3D 对象。

package cn.xnip;

import javax.media.opengl.*;
import javax.media.opengl.awt.GLCanvas;
import javax.media.opengl.glu.GLU;
import javax.swing.*;

public class J3DBasic implements GLEventListener {
    private GLU glu = new GLU();

    @Override
    public void display(GLAutoDrawable drawable) {

        final GL2 gl = drawable.getGL().getGL2();
        gl.glTranslatef(0f, 0f, -3f);
        gl.glBegin(GL2.GL_LINES);
        gl.glVertex3f(-1f, 0f, 0);
        gl.glVertex3f(0f, 1f, 0);
        gl.glEnd();

        //3D
        gl.glBegin(GL2.GL_LINES);
        gl.glVertex3f(-1f, 0f, -2f);
        gl.glVertex3f(0f, 1f, -2f);
        gl.glEnd();

        //top
        gl.glBegin(GL2.GL_LINES);
        gl.glVertex3f(-1f, 0f, 0);
        gl.glVertex3f(-1f, 0f, -2f);
        gl.glEnd();

        //bottom
        gl.glBegin(GL2.GL_LINES);
        gl.glVertex3f(0f, 1f, 0);
        gl.glVertex3f(0f, 1f, -2f);
        gl.glEnd();
    }

    @Override
    public void dispose(GLAutoDrawable arg0) {
        //method body
    }

    @Override
    public void init(GLAutoDrawable arg0) {
        // method body
    }

    @Override
    public void reshape(GLAutoDrawable drawable, int x, int y, int width, int height) {


        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(40.0f, h, 1.5, 18.0);
        gl.glMatrixMode(GL2.GL_MODELVIEW);
        gl.glLoadIdentity();

    }

    public static void main(String[] args) {


        final GLProfile gp = GLProfile.get(GLProfile.GL2);
        GLCapabilities cap = new GLCapabilities(gp);


        final GLCanvas gc = new GLCanvas(cap);
        J3DBasic b = new J3DBasic();
        gc.addGLEventListener(b);
        gc.setSize(600, 400);
        
        final JFrame frame = new JFrame("xnip.cn:JOGL 3D");

        frame.getContentPane().add(gc);
        frame.setSize(frame.getContentPane().getPreferredSize());
        frame.setVisible(true);
    }
}

输出结果为：