Java 图形学 5种画图方式

import java.awt.Graphics; import java.awt.image.BufferedImage; import java.io.File; import javax.imageio.ImageIO; import javax.swing.JOptionPane; /* * To change this template, choose Tools | Templates * and open the template in the editor. */ /** * * @author ZHBingo */ public class Graphics4 { public static void main(String[] args) { try{ int color; BufferedImage image = ImageIO.read(new File ("image/Undefined.jpg"));//读取一个待处理图像 BufferedImage blank = ImageIO.read(new File ("image/blank.jpg"));//读取一个空白图像 //定义变换矩阵 double[][] matrix = new double[3][3]; //旋转参数 double angle = Math.PI * 0 ;//旋转角度 //平移参数 double moveX = 0;//X轴平移长度 double moveY = 0;//Y轴平移长度 //缩放、旋转、对称、错切参数 double a = -1; double b = 0; double d = 0; double e = 1; //初始化矩阵 matrix[0][0] = a * Math.cos(angle); matrix[0][1] = d * Math.sin(angle); matrix[0][2] = 0; matrix[1][0] = - b * Math.sin(angle); matrix[1][1] = e * Math.cos(angle); matrix[1][2] = 0; matrix[2][0] = moveX; matrix[2][1] = moveY; matrix[2][2] = 1; for(int j = 0;j < HEIGHT;j ++) for(int i =0;i < WIDTH; i++){ color = image.getRGB(i, j); blank.setRGB( (int)( matrix[0][0] * i + matrix[1][0] * j + matrix[2][0] + BLANK_WIDTH / 2), (int)( matrix[0][1] * i + matrix[1][1] * j + matrix[2][1] + BLANK_HEIGHT / 2), color ); } //绘制坐标系 for(int x = 0; x < BLANK_WIDTH; x++){ blank.setRGB(x, BLANK_HEIGHT / 2, 0x000000); } for(int y = 0; y < BLANK_HEIGHT; y++){ blank.setRGB(BLANK_WIDTH / 2, y, 0x000000); } //绘制坐标轴箭头 for(int arrow = 1; arrow < 100; arrow++){ blank.setRGB(BLANK_WIDTH / 2 - arrow, BLANK_HEIGHT - arrow, 0x000000); blank.setRGB(BLANK_WIDTH / 2 + arrow, BLANK_HEIGHT - arrow, 0x000000); blank.setRGB(BLANK_WIDTH - arrow, BLANK_HEIGHT / 2 - arrow, 0x000000); blank.setRGB(BLANK_WIDTH - arrow, BLANK_HEIGHT / 2 + arrow, 0x000000); } //输出已经填充好的图形 Util.creatNewImage(blank,BLANK_WIDTH,BLANK_HEIGHT,0,0,"JPG","image/变换后的图形.jpg"); }catch(Exception ex){ ex.printStackTrace(); JOptionPane.showMessageDialog(null, ex.getMessage(), "ERROR！", 0) ; } } //待处理图像的宽和高 public static final int WIDTH = 800; public static final int HEIGHT = 600; //画板的宽和高 public static final int BLANK_WIDTH = 4000; public static final int BLANK_HEIGHT = 4000; } /* * 功能类 */ class Util{ //生成图像 public static void creatNewImage(BufferedImage image, int height, int width, int leftTopX, int leftTopY, String type, String imageName) throws Exception{ BufferedImage img = new BufferedImage( height,width, BufferedImage.TYPE_INT_RGB); Graphics g = img.getGraphics(); g.drawImage(image, -leftTopX, -leftTopY, null); ImageIO.write(img, type, new File(imageName)); } }