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Question

내가 문제 다음 중 하나의 중심 원의 중심에서 화살표를 그리기가 있어요 안녕하세요, 각 원은 XML에서입니다 다른 곳에서 내 코드를 않는 이유의 크기는 14

입니다 생각 해보자 트릭을하지 않는 것 같은데?

import java.awt.Color; 
import java.awt.Graphics; 
import java.awt.Graphics2D; 
import java.awt.Point; 
import java.awt.geom.AffineTransform; 
import java.io.File; 
import java.io.IOException; 
import java.util.Vector; 
import javax.swing.JFrame; 

다만

// Convenience method to draw from center with radius 
public void drawCircle(Graphics cg, int xCenter, int yCenter, int r) { 
    Graphics2D cg2 = (Graphics2D) cg.create(); 
    cg2.drawOval(xCenter - r, yCenter - r, r, r); 

}// end drawCircle 

문제 방법

private void disposeScene(Graphics g1, int x1, int y1, int r) { 
    Graphics2D g = (Graphics2D) g1.create(); 
    AffineTransform at = g.getTransform(); 
    AffineTransform at2 = new AffineTransform(); 
    at2 = AffineTransform.getScaleInstance(0.5, 0.5); // scaling à faire en 1er 
    g.transform(at2); // prise en compte de la matrice 
    at2 = AffineTransform.getTranslateInstance(getWidth()/2 + x1 + r/2, getHeight()/2 - y1 - r/2); // centrage 
    g.transform(at2); 

    double angle = (double) Math.cos(0); 
     for (int i = 0; i < 14; i++) { 
     angle = Math.rint(angle/(i + 1)); 
     g.setColor(Color.RED); 
     drawCircle(g, 0, 0, 2 * r); 
     Point center = new Point(); 
     center.setLocation(g.getTransform().getTranslateX()/2 + r/2 + x1/2, 
       g.getTransform().getTranslateY()/2 - r/2 - y1/2); 
     point_tab.add(center); 
     at2.concatenate(AffineTransform.getRotateInstance(angle)); // rotation autour d'un centre 
     g.transform(at2); 
     System.out.println(point_tab.elementAt(i).getX() + "," + point_tab.elementAt(i).getY()); 
     g.setColor(Color.BLUE); 
     if (i + 1 < point_tab.size()) { 
      drawArrow(g, point_tab.elementAt(i).getX(), point_tab.elementAt(i).getY(), 
        point_tab.elementAt(i + 1).getX(), point_tab.elementAt(i + 1).getY()); 
     } else { 
      drawArrow(g, point_tab.elementAt(i).getX(), point_tab.elementAt(i).getY(), 
        point_tab.elementAt(0).getX(), point_tab.elementAt(0).getY()); 
     } 
    } 
    g.setTransform(at); 

} 

SRC에서 화살표 도면 (여기에서 발견 재) 동그라미 그리기 프레임

public class GRAPHICS_REPRESENTATION extends JFrame { 
private Vector<Point> point_tab; 
public GRAPHICS_REPRESENTATION() { 
    super("graphic"); 
    point_tab = new Vector<Point>(0); 
    setSize(800, 800); 
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
    setVisible(true); 
} 

설정 to dst (여기에서 발견되고 재 작업 됨)

private final int ARR_SIZE = 4; 

private void drawArrow(Graphics g1, double xsrc, double ysrc, double xdst, double ydst) { 
    Graphics2D g = (Graphics2D) g1.create(); 
    double dx = xdst - xsrc, dy = ydst - ysrc; // distances 
    double angle = Math.atan2(dy, dx); 
    int len = (int) Math.sqrt(dx * dx + dy * dy); 
    AffineTransform at = g.getTransform(); 
    AffineTransform at2 = new AffineTransform(); 
    at2=AffineTransform.getTranslateInstance(xsrc, ysrc); 
    at2.concatenate(AffineTransform.getRotateInstance(angle)); 
    g.transform(at2); 

    // Draw horizontal arrow starting in (0, 0) 
    g.drawLine(0, 0, len, 0); 
    g.fillPolygon(new int[] { len, len - ARR_SIZE, len - ARR_SIZE, len }, new int[] { 0, -ARR_SIZE, ARR_SIZE, 0 }, 
      4); 
    g.setTransform(at); 
} 

주요 방법 여기

public void paint(Graphics g) { 
    disposeScene(g, getWidth()/4,getHeight()/4,40); 
} 

Answer 1

내가

/** 
* @brief draw the scene with all shapes set up 
* @param g1 
* @param x1 
* @param y1 
* @param xtg 
* @param r 
*/ 
private void disposeScene(Graphics g1, int x1, int y1, XML_TO_GRAPH xtg, int r) { 
    Graphics2D g = (Graphics2D) g1.create(); 
    g.translate(getWidth()/2, getHeight()/2); 
    drawCircle(g, 0, 0, (x1+y1)/2); // cercle fictif 
    for (int i = 0; i < xtg.getsceneVector().size(); i++) { 
     double angle = Math.toRadians(360.0); // radian mieux 2pi 

     angle = (angle*i/xtg.getsceneVector().size()); 
     System.out.println("angle(" + i + ")=" + angle); 
     g.setColor(Color.RED); 
     drawCircle(g, (int) (Math.cos(angle) * x1), (int) (Math.sin(angle) * y1), r); 

     Point center_big_circle = new Point(); 
     center_big_circle.setLocation((0), (0)); // centre du grand cercle fictif 
     Point center_little_circle = new Point(); 
     center_little_circle.setLocation((Math.cos(angle) * (x1)), (Math.sin(angle) * (y1))); // décalage vers les 
                           // bords 
     System.out.println("centre(" + i + ")=" + center_little_circle.getX() + "," + center_little_circle.getY()); 
     point_tab.add(center_little_circle); 
     g.setColor(Color.BLACK); 
     drawString(g, (int) center_little_circle.getX()-r, (int) center_little_circle.getY()-r, 16, "scène : " + i); 
     System.out.println(point_tab.elementAt(i).getX() + "," + point_tab.elementAt(i).getY()); 
     g.setColor(Color.BLUE); 
     if (i + 1 < point_tab.size()) {// si existe 
      drawArrow(g, point_tab.elementAt(i).getX(), point_tab.elementAt(i).getY(), 
        point_tab.elementAt(i + 1).getX(), point_tab.elementAt(i + 1).getY()); 
//    g.setColor(Color.BLACK); 
//    drawString(g, (int)((point_tab.elementAt(i+1).getX()- 
point_tab.elementAt(i).getX())/2), (int) ((point_tab.elementAt(i+1).getY()- 
point_tab.elementAt(i).getY())/2), 16, "X : " + 
xtg.getcount_occurence().toString()); 

      //idem 
      drawArrow(g, point_tab.elementAt(i+1).getX(), point_tab.elementAt(i+1).getY(), 
        point_tab.elementAt(i).getX(), point_tab.elementAt(i).getY()); 
//    drawString(g, (int)((point_tab.elementAt(i).getX()- 
point_tab.elementAt(i+1).getX())/2), (int) ((point_tab.elementAt(i).getY()- 
point_tab.elementAt(i+1).getY())/2), 16, "X : " + 
xtg.getcount_occurence().toString()); 

     } 
    } 

} 

및

// Convenience method to draw from center with radius 
/** 
* 
* @param cg 
* @param xCenter 
* @param yCenter 
* @param r 
*/ 
public void drawCircle(Graphics cg, int xCenter, int yCenter, int r) { 
    Graphics2D cg2 = (Graphics2D) cg.create(); 
    System.out.println("Center at: " + (xCenter - r) + "," + (yCenter - r)); 
    cg2.drawOval(xCenter - r, yCenter - r, 2 * r, 2 * r); 

}// end drawCircle 

하고 편리한 졸라 방법 혼자있는 솔루션 :

/** 
* 
* @param g1 
* @param x 
* @param y 
* @param size 
* @param str 
*/ 
private void drawString(Graphics g1, int x, int y, int size, String str) { 
    Graphics2D g = (Graphics2D) g1.create(); 
    g.setFont(new Font("Times New Roman", Font.PLAIN, size)); 
    g.drawString(str, x, y); 

} 

및 페인트 :`drawOval로 통화에서

public void paint(Graphics g) { 

    disposeScene(g, (int) (getWidth()/3), (int) (getHeight()/3), 20); 

}