import java.applet.*; import java.awt.*; import java.awt.event.*; public class homework extends Applet { static int WIDTH, HEIGHT; // 画面サイズ Point point[][]; // 制御点 int point_num = 0; // 制御点の番号 int captured_point = -1; // つかんでいる制御点の番号 //（-1のときつかんでいない） boolean capture_mode_FLG; // 線を制御できるかを表すフラグ static final int point_data[][][] = // 点情報 { //月 {{58,257},{74,412},{235,461},{380,412},{396,243}}, {{58,257},{74,66},{235,48},{380,66},{396,257}}, //うす {{194,268},{226,289},{260,270}}, {{194,268},{202,276},{200,285}}, {{260,270},{251,277},{251,286}}, {{200,285},{202,307},{191,327}}, {{251,286},{248,301},{256,324}}, {{191,327},{228,345},{256,324}}, //餅つき {{232,278},{237,265},{247,255}}, {{247,255},{240,242},{230,240}}, {{230,240},{228,245},{222,252}}, {{219,256},{215,264},{209,270}}, {{209,270},{210,274},{216,276}}, {{219,256},{198,244},{182,225}}, {{222,252},{208,231},{190,217}}, {{190,217},{183,218},{182,225}}, //うさぎ（右） {{286,256},{275,243},{285,224},{299,221},{313,232}}, {{313,232},{332,212},{353,226}}, {{353,226},{340,242},{318,239}}, {{318,239},{328,247},{316,257}}, {{316,257},{334,264},{341,283},{330,308}}, {{330,308},{342,320},{348,336},{338,340},{323,327},{322,311}}, {{322,311},{309,316},{291,315},{279,294},{278,274},{286,256}}, {{303,310},{302,326},{293,334},{284,332},{284,316},{296,304}}, {{336,286},{342,284},{347,292},{344,295},{344,301},{334,299}}, {{305,226},{311,207},{334,201}}, {{334,201},{328,216},{320,225}}, {{285,264},{270,256},{258,257},{262,270},{270,275},{282,277}}, {{307,268},{295,271},{290,283},{296,291},{306,285},{314,277}}, //うさぎ（左） {{171,171},{193,162},{217,183},{199,211},{173,198}}, {{173,198},{177,203},{169,210}}, {{169,210},{180,211},{186,220},{185,232},{176,231},{162,215}}, {{162,215},{157,222},{147,227},{138,223}}, {{138,223},{148,233},{144,263},{134,259},{127,239},{129,224}}, {{129,224},{107,218},{103,194},{125,172},{148,166},{163,180}}, {{163,180},{161,174},{164,173}}, {{164,173},{146,162},{148,137}}, {{148,137},{167,145},{171,170}}, {{182,168},{177,149},{195,139}}, {{194,139},{196,156},{189,170}}, {{121,221},{114,243},{108,245},{103,249},{96,226},{117,215}}, {{113,199},{103,200},{102,189},{110,183},{115,187},{117,193}}, {{171,206},{190,201},{198,223},{181,218}}, //雲（右下右） {{359,386},{358,366},{375,362},{389,376}}, {{384,385},{392,357},{415,353},{426,372}}, {{426,372},{438,352},{453,356},{461,376}}, {{461,376},{474,375},{475,418},{450,407}}, {{458,408},{450,431},{429,433},{420,414}}, {{420,414},{417,430},{387,431},{376,415}}, {{376,415},{352,417},{342,400},{359,386}}, //雲（右下左） {{280,426},{283,406},{307,404},{310,415}}, {{310,415},{318,403},{335,401},{341,413}}, {{341,413},{349,399},{372,428},{363,431}}, {{363,431},{387,433},{389,450},{363,455}}, {{363,455},{367,474},{348,471},{336,458}}, {{336,458},{326,469},{315,469},{302,452}}, {{302,452},{295,466},{273,458},{275,443}}, {{275,443},{261,433},{268,418},{283,417}}, //雲（左上） {{20,88},{26,63},{44,63},{60,79}}, {{52,71},{62,52},{95,56},{102,78}}, {{102,78},{125,77},{132,100},{105,103}}, {{105,103},{119,120},{103,127},{81,121}}, {{82,114},{84,135},{63,137},{59,113}}, {{60,119},{45,139},{31,128},{29,118}}, {{41,115},{10,129},{7,97},{21,89}}, }; Label tf; Graphics offg, backg; Image offi, backi; public void initialize() // 制御点の設定 { int i; point = new Point[point_data.length][]; for(i = 0; i < point.length; i++) { point[i] = new Point[point_data[i].length]; for(int j = 0; j < point_data[i].length; j++) point[i][j] = new Point(point_data[i][j][0], point_data[i][j][1]); } } public void init() { WIDTH = 480; HEIGHT = 480; Button increment, decrement, modify; increment = new Button("線を選ぶ(+)"); // 画面設定 decrement = new Button("線を選ぶ(-)"); modify = new Button("制御点を移動する"); tf = new Label(Integer.toString(point_num)); add(modify); add(increment); add(decrement); add(tf); increment.addActionListener(new ActionListener() // 制御点番号を増やす { public void actionPerformed(ActionEvent ae) { point_num++; if(point_num >= point.length) point_num = 0; tf.setText(Integer.toString(point_num)); repaint(); } }); decrement.addActionListener(new ActionListener() // 制御点番号を減らす { public void actionPerformed(ActionEvent ae) { point_num--; if(point_num < 0) point_num = point.length-1; tf.setText(Integer.toString(point_num)); repaint(); } }); modify.addActionListener(new ActionListener() // モード変更 { public void actionPerformed(ActionEvent ae) { capture_mode_FLG = !capture_mode_FLG; repaint(); } }); addMouseListener(new MouseAdapter() { public void mousePressed(MouseEvent me) // 制御点をつかむ { int i, mx = me.getX(), my = me.getY(); for(i = 0; i < point[point_num].length; i++) { if(point[point_num][i].x-3 <= mx && point[point_num][i].x+3 >= mx && point[point_num][i].y-3 <= my && point[point_num][i].y+3 >= my) break; } if(i < point[point_num].length) captured_point = i; } public void mouseReleased(MouseEvent me) { captured_point = -1; } }); addMouseMotionListener(new MouseMotionAdapter() // 制御点を動かす { public void mouseDragged(MouseEvent me) { if(captured_point == -1) return; point[point_num][captured_point].setLocation(me.getX(), me.getY()); repaint(); } }); initialize(); offi = createImage(WIDTH, HEIGHT); offg = offi.getGraphics(); backi = createImage(WIDTH, HEIGHT); backg = backi.getGraphics(); setBackImage(backg); // test! addKeyListener(new KeyAdapter() { public void keyPressed(KeyEvent ke) { int c = ke.getKeyCode(); if(c == 'P') { System.out.println("{"); for(int i = 0; i < point[point_num].length; i++) System.out.println(""+point[point_num][i].x +", "+point[point_num][i].y); System.out.println("},"); } else if(c == 'B') { // BezierCurve(backg, Color.black); repaint(); } } }); } public void setBackImage(Graphics g) // 背景の用意 { g.setColor(Color.white); g.fillRect(0, 0, WIDTH, HEIGHT); g.setColor(Color.black); g.drawRect(0, 0, WIDTH-1, HEIGHT-1); // 枠描画 } public int kaijyo(int num) // 階乗を計算 { int total = 1; if(num == 0) return 1; for(; num > 1; num--) total *= num; return total; } public void BezierCurve(Graphics g, Color color, Point point[]) // 曲線描画 { int i, j; double x1, x2, y1, y2; double bernstein[] = new double[point.length]; x1 = point[0].x; y1 = point[0].y; g.setColor(color); for(double t = 0; t <= 1; t += 0.01) { for(i = 0; i < point.length; i++) // bernstein関数を計算 { bernstein[i] = (double)kaijyo(point.length-1) / (kaijyo(i)*kaijyo(point.length-1-i)); for(j = 1; j <= i; j++) bernstein[i] *= t; for(j = 1; j <= point.length-1-i; j++) bernstein[i] *= (1-t); } x2 = y2 = 0; for(i = 0; i < point.length; i++) { x2 += point[i].x * bernstein[i]; y2 += point[i].y * bernstein[i]; } g.drawLine((int)x1, (int)y1, (int)x2, (int)y2); x1 = x2; y1 = y2; } } public void paint(Graphics g) { requestFocus(); offg.drawImage(backi, 0, 0, this); // 背景の描画 if(capture_mode_FLG) // 制御点の描画 { offg.setColor(Color.red); for(int i = 0; i < point[point_num].length; i++) { offg.fillRect(point[point_num][i].x-3, point[point_num][i].y-3, 7, 7); offg.drawString(Integer.toString(i+1), point[point_num][i].x-3, point[point_num][i].y-6); } } for(int i = 0; i < point.length; i++) // 曲線描画 { if(capture_mode_FLG && point_num == i) BezierCurve(offg, Color.blue, point[i]); else BezierCurve(offg, Color.black, point[i]); } g.drawImage(offi, 0, 0, this); } public void update(Graphics g) { paint(g); } }