java绘制3D
时间: 2023-10-11 12:22:51 浏览: 44
Java 本身并没有提供原生的 3D 绘制功能,但是可以使用一些第三方库来实现。其中比较常用的 3D 绘制库有 Java3D 和 JOGL(Java OpenGL)。
以下是一个使用 JOGL 库绘制 3D 立方体的示例代码:
```java
import javax.media.opengl.GL;
import javax.media.opengl.GLAutoDrawable;
import javax.media.opengl.GLEventListener;
import javax.media.opengl.GLProfile;
import javax.media.opengl.GLCapabilities;
import javax.media.opengl.awt.GLCanvas;
import javax.swing.JFrame;
import com.jogamp.opengl.util.FPSAnimator;
public class Main implements GLEventListener {
private GLCanvas canvas;
private FPSAnimator animator;
private float angle = 0.0f;
public static void main(String[] args) {
JFrame frame = new JFrame("3D Cube");
GLProfile profile = GLProfile.get(GLProfile.GL2);
GLCapabilities capabilities = new GLCapabilities(profile);
Main app = new Main();
app.canvas = new GLCanvas(capabilities);
app.canvas.addGLEventListener(app);
frame.getContentPane().add(app.canvas);
frame.setSize(640, 480);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
app.animator = new FPSAnimator(app.canvas, 60);
app.animator.start();
}
public void init(GLAutoDrawable drawable) {
GL gl = drawable.getGL();
gl.glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
gl.glEnable(GL.GL_DEPTH_TEST);
}
public void dispose(GLAutoDrawable drawable) {
}
public void display(GLAutoDrawable drawable) {
GL gl = drawable.getGL();
gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
gl.glLoadIdentity();
gl.glTranslatef(0.0f, 0.0f, -5.0f);
gl.glRotatef(angle, 1.0f, 1.0f, 1.0f);
gl.glBegin(GL.GL_QUADS);
gl.glColor3f(1.0f, 0.0f, 0.0f);
gl.glVertex3f(-1.0f, 1.0f, -1.0f);
gl.glVertex3f(1.0f, 1.0f, -1.0f);
gl.glVertex3f(1.0f, -1.0f, -1.0f);
gl.glVertex3f(-1.0f, -1.0f, -1.0f);
gl.glColor3f(0.0f, 1.0f, 0.0f);
gl.glVertex3f(-1.0f, 1.0f, 1.0f);
gl.glVertex3f(1.0f, 1.0f, 1.0f);
gl.glVertex3f(1.0f, -1.0f, 1.0f);
gl.glVertex3f(-1.0f, -1.0f, 1.0f);
gl.glColor3f(0.0f, 0.0f, 1.0f);
gl.glVertex3f(-1.0f, 1.0f, -1.0f);
gl.glVertex3f(1.0f, 1.0f, -1.0f);
gl.glVertex3f(1.0f, 1.0f, 1.0f);
gl.glVertex3f(-1.0f, 1.0f, 1.0f);
gl.glColor3f(1.0f, 1.0f, 0.0f);
gl.glVertex3f(-1.0f, -1.0f, -1.0f);
gl.glVertex3f(1.0f, -1.0f, -1.0f);
gl.glVertex3f(1.0f, -1.0f, 1.0f);
gl.glVertex3f(-1.0f, -1.0f, 1.0f);
gl.glColor3f(0.0f, 1.0f, 1.0f);
gl.glVertex3f(1.0f, 1.0f, -1.0f);
gl.glVertex3f(1.0f, 1.0f, 1.0f);
gl.glVertex3f(1.0f, -1.0f, 1.0f);
gl.glVertex3f(1.0f, -1.0f, -1.0f);
gl.glColor3f(1.0f, 0.0f, 1.0f);
gl.glVertex3f(-1.0f, 1.0f, -1.0f);
gl.glVertex3f(-1.0f, 1.0f, 1.0f);
gl.glVertex3f(-1.0f, -1.0f, 1.0f);
gl.glVertex3f(-1.0f, -1.0f, -1.0f);
gl.glEnd();
angle += 1.0f;
}
public void reshape(GLAutoDrawable drawable, int x, int y, int width, int height) {
GL gl = drawable.getGL();
float aspectRatio = (float) height / width;
gl.glMatrixMode(GL.GL_PROJECTION);
gl.glLoadIdentity();
gl.glFrustum(-1.0f, 1.0f, -aspectRatio, aspectRatio, 1.0f, 100.0f);
gl.glMatrixMode(GL.GL_MODELVIEW);
}
}
```
这段代码创建了一个窗口,并使用 JOGL 库在窗口中绘制一个 3D 立方体。在 `init` 方法中启用深度测试,`display` 方法中绘制立方体的六个面,`reshape` 方法中设置投影矩阵。最后在 `main` 方法中创建窗口并启动动画循环。
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