轮廓形状

Question

所以基本上我需要的形状把星号的如本图片：

所以这是我目前的解决方案。

import java.applet.Applet; 
import java.awt.BasicStroke; 
import java.awt.Color; 
import java.awt.Graphics; 
import java.awt.Stroke; 

import javax.swing.JFrame; 
import javax.swing.JPanel; 

public class ThreePointTen extends Applet{ 
    public void init(String[] a) { 

    } 

public void paint(Graphics g){ 
    char a = '*'; 
    //square 
     g.drawString("**********", 25, 25); 
     g.drawString("*    *", 25, 35); 
     g.drawString("*    *", 25, 45); 
     g.drawString("*    *", 25, 55); 
     g.drawString("*    *", 25, 65); 
     g.drawString("*    *", 25, 75); 
     g.drawString("*    *", 25, 85); 
     g.drawString("*    *", 25, 95); 
     g.drawString("**********", 25, 105); 

    //oval 
     g.drawString("***", 175, 25); 
     g.drawString("*   * ", 165, 35); 
     g.drawString("*    * ", 158, 45); 
     g.drawString("*    * ", 158, 55); 
     g.drawString("*    * ", 158, 65); 
     g.drawString("*    * ", 158, 75); 
     g.drawString("*    * ", 158, 85); 
     g.drawString("*   * ", 165, 95); 
     g.drawString("***", 175, 105); 

    } 

} 

我基本上只是猜测如何使每个形状和他们去哪里。这种方法非常慢并且效率低下。我想知道是否可以使用g.draw来制作一个形状，然后用一个字符来排列它。

Answer 1

您可以创建一个内部由这些星号/星号组成的特殊Stroke。然后，您可以使用stroke.createStrokedShape(shape)创建一个代表另一个形状的新形状，并用此笔画绘制。

有一个（Apache授权）实现这样的冲程的http://www.jhlabs.com/java/java2d/strokes/（也包含在下面的代码，与链路和版权相关信息）

THRE结果可能是这样的：

与下面的独立实例创建：

import java.awt.Font; 
import java.awt.Graphics; 
import java.awt.Graphics2D; 
import java.awt.RenderingHints; 
import java.awt.Shape; 
import java.awt.Stroke; 
import java.awt.font.FontRenderContext; 
import java.awt.font.GlyphVector; 
import java.awt.geom.AffineTransform; 
import java.awt.geom.FlatteningPathIterator; 
import java.awt.geom.GeneralPath; 
import java.awt.geom.PathIterator; 
import java.awt.geom.Rectangle2D; 

import javax.swing.JFrame; 
import javax.swing.JPanel; 
import javax.swing.SwingUtilities; 

public class StarShapes 
{ 
    public static void main(String[] args) 
    { 
     SwingUtilities.invokeLater(new Runnable() 
     { 
      @Override 
      public void run() 
      { 
       createAndShowGUI(); 
      } 
     }); 
    } 

    private static void createAndShowGUI() 
    { 
     JFrame f = new JFrame(); 
     f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     f.getContentPane().add(new StarShapesPanel()); 
     f.setSize(600,400); 
     f.setLocationRelativeTo(null); 
     f.setVisible(true); 
    } 

} 

class StarShapesPanel extends JPanel 
{ 
    @Override 
    protected void paintComponent(Graphics gr) 
    { 
     super.paintComponent(gr); 
     Graphics2D g = (Graphics2D)gr; 
     g.setRenderingHint(
      RenderingHints.KEY_ANTIALIASING, 
      RenderingHints.VALUE_ANTIALIAS_ON); 

     Font starFont = new Font("Monospaced", Font.BOLD, 20); 
     Shape starShape = createShape(starFont, "*"); 
     Stroke stroke = new ShapeStroke(new Shape[] { starShape }, 12.0f); 

     Font textFont = new Font("Serif", Font.PLAIN, 250); 
     Shape textShape = createShape(textFont, "Stars!"); 
     g.translate(10, 250); 
     Shape strokedTextShape = 
      stroke.createStrokedShape(textShape); 
     g.fill(strokedTextShape); 
    } 

    private static Shape createShape(Font font, String s) 
    { 
     FontRenderContext fontRenderContext = 
      new FontRenderContext(null,true,true); 
     GlyphVector glyphVector = 
      font.createGlyphVector(fontRenderContext, s); 
     return glyphVector.getOutline(); 
    } 

} 



//============================================================================ 
// From http://www.jhlabs.com/java/java2d/strokes/ 

/* 
Copyright 2006 Jerry Huxtable 

Licensed under the Apache License, Version 2.0 (the "License"); 
you may not use this file except in compliance with the License. 
You may obtain a copy of the License at 

    http://www.apache.org/licenses/LICENSE-2.0 

Unless required by applicable law or agreed to in writing, software 
distributed under the License is distributed on an "AS IS" BASIS, 
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
See the License for the specific language governing permissions and 
limitations under the License. 
*/ 

class ShapeStroke implements Stroke { 
    private Shape shapes[]; 
    private float advance; 
    private boolean stretchToFit = false; 
    private boolean repeat = true; 
    private AffineTransform t = new AffineTransform(); 
    private static final float FLATNESS = 1; 

    public ShapeStroke(Shape shapes, float advance) { 
     this(new Shape[] { shapes }, advance); 
    } 

    public ShapeStroke(Shape shapes[], float advance) { 
     this.advance = advance; 
     this.shapes = new Shape[shapes.length]; 

     for (int i = 0; i < this.shapes.length; i++) { 
      Rectangle2D bounds = shapes[i].getBounds2D(); 
      t.setToTranslation(-bounds.getCenterX(), -bounds.getCenterY()); 
      this.shapes[i] = t.createTransformedShape(shapes[i]); 
     } 
    } 

    public Shape createStrokedShape(Shape shape) { 
     GeneralPath result = new GeneralPath(); 
     PathIterator it = new FlatteningPathIterator(shape.getPathIterator(null), FLATNESS); 
     float points[] = new float[6]; 
     float moveX = 0, moveY = 0; 
     float lastX = 0, lastY = 0; 
     float thisX = 0, thisY = 0; 
     int type = 0; 
     boolean first = false; 
     float next = 0; 
     int currentShape = 0; 
     int length = shapes.length; 

     float factor = 1; 

     while (currentShape < length && !it.isDone()) { 
      type = it.currentSegment(points); 
      switch(type){ 
      case PathIterator.SEG_MOVETO: 
       moveX = lastX = points[0]; 
       moveY = lastY = points[1]; 
       result.moveTo(moveX, moveY); 
       first = true; 
       next = 0; 
       break; 

      case PathIterator.SEG_CLOSE: 
       points[0] = moveX; 
       points[1] = moveY; 
       // Fall into.... 

      case PathIterator.SEG_LINETO: 
       thisX = points[0]; 
       thisY = points[1]; 
       float dx = thisX-lastX; 
       float dy = thisY-lastY; 
       float distance = (float)Math.sqrt(dx*dx + dy*dy); 
       if (distance >= next) { 
        float r = 1.0f/distance; 
        float angle = (float)Math.atan2(dy, dx); 
        while (currentShape < length && distance >= next) { 
         float x = lastX + next*dx*r; 
         float y = lastY + next*dy*r; 
         t.setToTranslation(x, y); 
         t.rotate(angle); 
         result.append(t.createTransformedShape(shapes[currentShape]), false); 
         next += advance; 
         currentShape++; 
         if (repeat) 
          currentShape %= length; 
        } 
       } 
       next -= distance; 
       first = false; 
       lastX = thisX; 
       lastY = thisY; 
       break; 
      } 
      it.next(); 
     } 

     return result; 
    } 

} 

Answer 2

对于你的东东基本实现d创建要绘制的像素的“位图”。因此，您可以创建一个简单的形状图片，然后创建一个小算法在图形中绘制每个“x”。

喜欢的东西：

import java.awt.*; 
import java.awt.event.*; 
//import java.awt.image.*; 
//import java.util.*; 
import java.util.List; 
import java.util.ArrayList; 
import javax.swing.*; 
import javax.swing.event.*; 
import javax.swing.text.*; 
//import java.beans.*; 
import javax.swing.border.*; 
//import javax.swing.plaf.*; 
//import javax.swing.text.*; 
//import javax.swing.table.*; 
//import java.io.*; 
//import javax.imageio.*; 
//import java.awt.geom.*; 

public class PaintShape extends JPanel 
{ 
    private final static String[] SQUARE = 
    { 
     "xxxxxxxxx", 
     "x  x", 
     "x  x", 
     "x  x", 
     "x  x", 
     "x  x", 
     "x  x", 
     "x  x", 
     "xxxxxxxxx" 
    }; 

    private final static String[] ARROW = 
    { 
     " x ", 
     " xxx ", 
     " xxxxx ", 
     " x ", 
     " x ", 
     " x ", 
     " x ", 
     " x ", 
     " x " 
    }; 

    private ArrayList<String[]> shapes = new ArrayList<String[]>(); 
    private String outlineCharacter = "*"; 

    public void addShape(String[] shape) 
    { 
     this.shapes.add(shape); 
    } 

    public void setOutlineCharacter(String outlineCharacter) 
    { 
     this.outlineCharacter = outlineCharacter; 
    } 

    @Override 
    protected void paintComponent(Graphics g) 
    { 
     super.paintComponent(g); 

     int outlineCharacterWidth = 10; 
     int lineHeight = 10; 

     int shapeStart = 0; 
     int x = shapeStart; 
     int y = 0; 

     for (String[] shape: shapes) 
     { 
      y = lineHeight; 

      for (int row = 0; row < shape.length; row++) 
      { 
       String bitmap = shape[row]; 

       x = shapeStart; 

       for (int column = 0; column < bitmap.length(); column++) 
       { 
        if (bitmap.charAt(column) == 'x') 
        { 
         g.drawString(outlineCharacter, x, y); 
        } 

        x += outlineCharacterWidth; 
       } 

       y += lineHeight; 
      } 

      x += 20; // gap between shapes 
      shapeStart = x; 
     } 
    } 

    private static void createAndShowGUI() 
    { 
     PaintShape paint = new PaintShape(); 
     paint.addShape(PaintShape.SQUARE); 
     paint.addShape(PaintShape.ARROW); 
     paint.addShape(PaintShape.SQUARE); 

     JFrame frame = new JFrame("PaintShape"); 
     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     frame.add(paint); 
     frame.setLocationByPlatform(true); 
     frame.setSize(200, 200); 
     frame.setVisible(true); 
    } 

    public static void main(String[] args) 
    { 
     EventQueue.invokeLater(new Runnable() 
     { 
      public void run() 
      { 
       createAndShowGUI(); 
      } 
     }); 
    } 
}