輪廓形狀

Question

所以基本上我需要的形狀把星號的如本圖片：

所以這是我目前的解決方案。

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); 

    } 

} 

我基本上只是猜測如何使每個形狀和他們去哪裏。這種方法非常慢並且效率低下。我想知道是否可以使用g.draw來製作一個形狀，然後用一個字符來排列它。

Answer 1

您可以創建一個內部由這些星號/星號組成的特殊Stroke。然後，您可以使用stroke.createStrokedShape(shape)創建一個代表另一個形狀的新形狀，並用此筆畫繪製。

有一個（Apache授權）實現這樣的衝程的http://www.jhlabs.com/java/java2d/strokes/（也包含在下面的代碼，與鏈路和版權相關信息）

THRE結果可能是這樣的：

與下面的獨立實例創建：

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

對於你的東東基本實現d創建要繪製的像素的「位圖」。因此，您可以創建一個簡單的形狀圖片，然後創建一個小算法在圖形中繪製每個「x」。

喜歡的東西：

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(); 
      } 
     }); 
    } 
}