ERLEDIGT
NEIN
NEIN
ANTWORTEN
0
0
ZUGRIFFE
175
175
EMPFEHLEN
-
Grüß euch

Brauch wieder mal eure Hilfe, muss für die Uni eine Rekursionsaufgabe machen. Im Anhang befindet sich ein Bild wie das ganze aussehen soll
habe es nun probiert und bitte da schonmal um Verbesserungen! Funktioniert auch sehr gut, aber mein Problem ist, dass ich das ganze ohne doppelte Linien zeichnen soll... Also immer nur alles einmal und verstehe nicht ganz wie das gehen soll?
Wäre schon dankbar falls wer CodeVerbesserungen hat (falls was geht)
danke euch!!
Meine Klasse die ich bearbeitet habe:
Code java:1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54
package spinningSquare; class SpinningSquare { public static void main(String [] args){ System.out.println("Rekursionstiefe: "); int recursion = Input.readInt(); int length = 0; while (length <= 0){ System.out.println("Basis-Laenge des 1. Dreiecks: "); length = Input.readInt(); } int angle = 0; while (angle <= 0 || angle >=90){ System.out.println("Winkel: "); angle = Input.readInt(); } draw(recursion, length, angle); } private static void draw(int recursion, double length, double angle){ System.out.println("Spinning Square started"); //start-position Turtle.setPos(150, 20); //Turtle.right(angle); recursion(recursion,length,angle); Turtle.showGraphics("Spinning Square"); System.out.println("Spinning Square ended"); } private static void recursion(int recursion,double length,double angle) { double angle_rad = angle * Math.PI / 180; double x = Math.tan(angle_rad)*length/(1+Math.tan(angle_rad)); Turtle.forward(length); Turtle.left(90); for(int i =0;i<3;i++) { Turtle.forward(length); Turtle.left(90); } Turtle.forward(x); Turtle.left(angle); if(recursion>0) { double new_length=Math.sqrt(Math.pow(x, 2)+Math.pow(length-x,2)); recursion(recursion-1,new_length,angle); } } }
Code java:1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223
package spinningSquare; import java.awt.Color; /** * @author Volker Christian (volker.christian@fh-hagenberg.at) * @version 1.0 */ public class Turtle { private static int[][][] picture = new int[500][800][3]; static { erase(); } private static double x = 0; private static double y = 0; private static double angle = 0; private static int stepWidth = 1; private static Color color = Color.BLACK; private static boolean isDrawing = true; protected static void putPixel(double xx, double yy) { int x = (int) Math.round(xx); int y = (int) Math.round(yy); int yMax = picture.length; if (yMax - y - 1 < 0 || yMax - y - 1 >= picture.length || x < 0 || x >= picture[0].length || !isDrawing) { return; } picture[yMax - y - 1][x][0] = color.getRed(); picture[yMax - y - 1][x][1] = color.getGreen(); picture[yMax - y - 1][x][2] = color.getBlue(); } protected static void drawLine(int x1, int y1, int x2, int y2) { int x = x1, y = y1, d = 0, hx = x2 - x1, hy = y2 - y1; int xInc = 1; int yInc = 1; if (hx < 0) { xInc = -1; hx = -hx; } if (hy < 0) { yInc = -1; hy = -hy; } if (hy <= hx) { int c = 2 * hx; int k = 2 * hy; while (true) { putPixel(x, y); if (x == x2) { break; } x += xInc; d += k; if (d > hx) { y += yInc; d -= c; } } } else { int c = 2 * hy; int k = 2 * hx; while (true) { putPixel(x, y); if (y == y2) { break; } y += yInc; d += k; if (d > hy) { x += xInc; d -= c; } } } } protected static void drawPLine(double x1, double y1, double x2, double y2) { System.out.println("draw ("+x1+"/"+y1+") to ("+x2+"/"+y2+")"); double x = x1, y = y1, d = 0; double hx = x2 - x1, hy = y2 - y1; double xInc = 1; double yInc = 1; if (hx < 0) { xInc = -1; hx = -hx; } if (hy < 0) { yInc = -1; hy = -hy; } if (hy <= hx) { double c = 2 * hx; double k = 2 * hy; while (true) { putPixel(x, y); if ((xInc > 0 && (x > x2)) || ((xInc <= 0) && x <= x2)) { break; } x += xInc; d += k; if (d > hx) { y += yInc; d -= c; } } } else { double c = 2 * hy; double k = 2 * hx; while (true) { putPixel(x, y); if ((yInc > 0 && (y > y2)) || ((yInc <= 0) && y<= 2)) { break; } y += yInc; d += k; if (d > hy) { x += xInc; d -= c; } } } } public static void forward(double n) { double xn = x + n * stepWidth * ((Math.cos((2.0 * Math.PI * angle) / 360.0))%360); double yn = y + n * stepWidth * ((Math.sin((2.0 * Math.PI * angle) / 360.0)%360)); drawLine( (int) Math.round(x), (int) Math.round(y), (int) Math.round(xn), (int) Math.round(yn)); //drawPLine(x, y, xn, yn); x = xn; y = yn; Presenter.updateMovie(picture); } public static void setPos(int x, int y) { Turtle.x = x; Turtle.y = y; } protected static void setAngle(double angle) { Turtle.angle = angle; } protected static void stepWidth(int width) { Turtle.stepWidth = width; } public static void left(double angel) { //IO.writeLn("angle=" + angle); Turtle.angle = (Turtle.angle + angel)%360.0; } public static void right(double angel) { Turtle.angle = (Turtle.angle - angel)%360.0; } public static void setColor(Color color) { Turtle.color = color; } public static void showGraphics(String title) { Presenter.viewImage(title, picture); } protected static void showMovie(String title) { Presenter.viewMovie(title, picture); } protected static void penUp() { Turtle.isDrawing = false; } protected static void penDown() { Turtle.isDrawing = true; } protected static void erase() { for (int y = 0; y < picture.length; y++) { for (int x = 0; x < picture[0].length; x++) { picture[y][x][0] = 255; picture[y][x][1] = 255; picture[y][x][2] = 255; } } } }
Code java:1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618
package spinningSquare; import java.awt.BorderLayout; import java.awt.Canvas; import java.awt.Color; import java.awt.Dimension; import java.awt.Graphics; import java.awt.Frame; import java.awt.Image; import java.awt.Toolkit; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; import java.awt.image.MemoryImageSource; import java.util.HashMap; import java.util.Map; import java.util.Vector; /** * This class provides some static methods to view different styles of content. * Every call to a method creates a frame viewing a simple representation of the * provided content. * * @author Volker Christian (volker.christian@fh-hagenberg.at) * @version 1.0 */ public class Presenter { static private class HistogramFrame extends Frame { private static final long serialVersionUID = -1297885049512116682L; private Vector<Integer> histogramLengths = new Vector<Integer>(); private Vector<int[]> histograms = new Vector<int[]>(); private Vector<Color> histogramColors = new Vector<Color>(); private int maxHeight = Integer.MIN_VALUE; private int maxWidth = Integer.MIN_VALUE; private Color backgroundColor = Color.WHITE; private HistogramCanvas histogramCanvas = null; private class HistogramFrameWindowAdapter extends WindowAdapter { private HistogramFrame histogramFrame = null; HistogramFrameWindowAdapter(HistogramFrame hf) { this.histogramFrame = hf; } public void windowClosing(WindowEvent e) { histogramFrame.closeFrame(); } } private class HistogramCanvas extends Canvas { private static final long serialVersionUID = 5573564144397035012L; private Image offScreenImage = null; private Graphics offScreenGraphics = null; private int oldWidth = Integer.MIN_VALUE; private int oldHeight = Integer.MIN_VALUE; public void paintHistogram(Graphics g) { Dimension d = this.getSize(); int textHeight = g.getFontMetrics().getHeight(); int textWidth = 10; int histogrammXOffset = textWidth; int histogrammYOffset = 0; int histogrammWidth = d.width - textWidth; int histogrammHeight = d.height - textHeight; g.setColor(backgroundColor); g.fillRect(0, 0, histogrammWidth, histogrammHeight); double factorY = (histogrammHeight) / (double) maxHeight; double factorX = (histogrammWidth) / (double) (maxWidth); for (int h = 0; h < histograms.size(); h++) { int red = histogramColors.get(h).getRed(); int green = histogramColors.get(h).getGreen(); int blue = histogramColors.get(h).getBlue(); Color lineColor = new Color(red, green, blue); int[] histogram = histograms.elementAt(h); int yO = histogrammYOffset; int xO = histogrammXOffset; for (int i = 0; i < histogramLengths.get(h).intValue(); i++) { int xN = histogrammXOffset + (int) ((i + 1) * factorX); int yN = histogrammYOffset + histogrammHeight - (int) (((double) histogram[i]) * factorY); g.setColor(lineColor); g.drawLine(xO, yO, xO, yN); g.drawLine(xO, yN, xN, yN); g.setColor((Color) histogramColors.get(h)); int[] xPoints = { xO, xO, xN, xN }; int[] yPoints = { histogrammHeight, yN, yN, histogrammHeight }; g.fillPolygon(xPoints, yPoints, 4); xO = xN; yO = yN; } } if (histograms.size() > 0) { g.setColor(Color.BLACK); g.drawLine(histogrammXOffset, histogrammHeight, histogrammXOffset + (int) (maxWidth * factorX), histogrammHeight); g.drawLine(histogrammXOffset, histogrammHeight, histogrammXOffset, 0); int fontHeight = g.getFontMetrics().getHeight(); int numberOfLabels = 6; for (int i = 0; i <= numberOfLabels; i++) { int dx = (int) (Math .round(((maxWidth - 1.0) / numberOfLabels) * i) * factorX + 0.5 * factorX); String s = String.valueOf(Math.round(i * (maxWidth - 1.0) / numberOfLabels)); g.drawString(s, histogrammXOffset - g.getFontMetrics().stringWidth(s) + dx, histogrammHeight + fontHeight); g.drawLine(histogrammXOffset + dx, histogrammHeight, histogrammXOffset + dx, histogrammHeight + fontHeight); } } } public void paintOffScreenHistogram(Graphics g, boolean forceRepaint) { int width = getSize().width; int height = getSize().height; if (oldWidth != width || oldHeight != height) { oldWidth = width; oldHeight = height; offScreenImage = createImage(width, height); offScreenGraphics = offScreenImage.getGraphics(); forceRepaint = true; } if (forceRepaint) { paintHistogram(offScreenGraphics); } width = getSize().width; height = getSize().height; if (oldWidth == width && oldHeight == height) { g.drawImage(offScreenImage, 0, 0, this); } } public void update(Graphics g) { /* * Called by repaint such an update-call should force a complete * repaint */ paintOffScreenHistogram(g, true); } public void paint(Graphics g) { /* * Called by the system * again visible * resize of the frame * such an paint-call should lead to a selective forced repaint. * * No complete repaint should happen if the frame hasn't changed * size. In this case it is sufficient to map the already filled * offscreen-image to the Graphics g * * A complete repaint should happen if the frame has changed * size */ paintOffScreenHistogram(g, false); } } protected HistogramFrame(String title) { this.setResizable(false); this.setTitle("Histogram - " + title); this.addWindowListener(new HistogramFrameWindowAdapter(this)); this.add(histogramCanvas = new HistogramCanvas()); histogramCanvas.setPreferredSize(new Dimension(260, 150)); // histogramCanvas.setPreferredSize(new Dimension(390, 225)); } protected void addHistogram(int[] histogram, int length, int max, Color color) { histograms.add(histogram); this.histogramLengths.add(new Integer(length)); histogramColors.add(color); this.maxHeight = (this.maxHeight < max) ? max : this.maxHeight; this.maxWidth = (this.maxWidth < length) ? length : this.maxWidth; histogramCanvas.repaint(); } private void closeFrame() { dispose(); } protected void setBackgroundColor(Color c) { backgroundColor = c; } } /** * This method creates a frame and draws a couble of histograms in it. * * @param title * the title showing up in the title bar of the frame * @param histograms * a two-dimensional array containing a couble of histograms. The * first index selects a specific histogram, the second index * numbers all values of a specific histogram selected by the * first index. * @param colors * the colors used for the histograms. The index selects a * specific color for the corresponding specific histogram. */ public static void viewHistogram(String title, int[][] histograms, Color[] colors, Color backGroundColor) { HistogramFrame histogramFrame = new HistogramFrame(title); histogramFrame.setBackground(backGroundColor); histogramFrame.setBackgroundColor(backGroundColor); histogramFrame.pack(); histogramFrame.setVisible(true); for (int h = 0; h < histograms.length; h++) { int max = Integer.MIN_VALUE; int[] histogram = histograms[h]; Color color = colors[h]; for (int i = 0; i < histogram.length; i++) { max = (max < histogram[i]) ? histogram[i] : max; } histogramFrame .addHistogram(histogram, histogram.length, max, color); } } /** * This method creates a frame and draws a histogram in it. * * @param title * the title showing up in the title bar of the frame * @param histogram * an integer array containing the histogram information */ public static void viewHistogram(String title, int[] histogram) { viewHistogram(title, histogram, Color.BLACK, Color.WHITE); } /** * This method creates a frame and draws a histogram in it. * * @param title * the title showing up in the title bar of the frame * @param histogram * an integer array containing the histogram information * @param foreGroundColor * the color used for the histogram */ public static void viewHistogram(String title, int[] histogram, Color foreGroundColor) { viewHistogram(title, histogram, foreGroundColor, Color.WHITE); } /** * This method creates a frame and draws a histogram in it. * * @param title * the title showing up in the title bar of the frame * @param histogram * an integer array containing the histogram information * @param foreGroundColor * the color used for the histogram * @param backGroundColor * the background color of the histogram */ public static void viewHistogram(String title, int[] histogram, Color foreGroundColor, Color backGroundColor) { int[][] histograms = new int[1][]; histograms[0] = histogram; Color[] colors = new Color[1]; colors[0] = foreGroundColor; viewHistogram(title, histograms, colors, backGroundColor); } /** * This method creates a frame and draws three histograms in it. * * @param title * the title showing up in the title bar of the frame * @param histogram1 * an integer array containing the first histogram information * @param color1 * the color used for the first histogram * @param histogram2 * an integer array containing the second histogram information * @param color2 * the color used for the second histogram * @param histogram3 * an integer array containing the third histogram information * @param color3 * the color used for the third histogram */ public static void viewHistogram(String title, int[] histogram1, Color color1, int[] histogram2, Color color2, int[] histogram3, Color color3) { viewHistogram(title, histogram1, color1, histogram2, color2, histogram3, color3, Color.WHITE); } /** * This method creates a frame and draws three histograms in it. * * @param title * the title showing up in the title bar of the frame * @param histogram1 * an integer array containing the first histogram information * @param color1 * the color used for the first histogram * @param histogram2 * an integer array containing the second histogram information * @param color2 * the color used for the second histogram * @param histogram3 * an integer array containing the third histogram information * @param color3 * the color used for the third histogram * @param backGroundColor * the background color of the histograms */ public static void viewHistogram(String title, int[] histogram1, Color color1, int[] histogram2, Color color2, int[] histogram3, Color color3, Color backGroundColor) { int[][] histograms = new int[3][]; histograms[0] = histogram1; histograms[1] = histogram2; histograms[2] = histogram3; Color[] colors = new Color[3]; colors[0] = color1; colors[1] = color2; colors[2] = color3; viewHistogram(title, histograms, colors, backGroundColor); } /* ---------------------- Image methods ------------------------ */ static private class ImageFrame extends Frame { private static final long serialVersionUID = -3961613485615270343L; private ImageCanvas imageCanvas = null; private Image image = null; private class ImageFrameWindowAdapter extends WindowAdapter { private ImageFrame imageFrame = null; ImageFrameWindowAdapter(ImageFrame imageFrame) { this.imageFrame = imageFrame; } public void windowClosing(WindowEvent e) { imageFrame.closeFrame(); } } private class ImageCanvas extends Canvas { private static final long serialVersionUID = 2481133924901847011L; public void paint(Graphics g) { g.drawImage(image, 0, 0, this); } } public ImageFrame(Image image) { this.addWindowListener(new ImageFrameWindowAdapter(this)); this.setLayout(new BorderLayout()); this.image = image; imageCanvas = new ImageCanvas(); this.add(imageCanvas); } public void setCanvasSize(int width, int height) { imageCanvas.setPreferredSize(new Dimension(width, height)); } private void closeFrame() { dispose(); } } /** * The method viewImage opens a frame and displays a RGB-Image in it. * * @param title * the title showing up in the title bar of the frame * @param rgbImage * a three-dimensional array containing the RGB-data of the * image. The first index is the y-coordinate into the image, the * second index is the x-coordinate into the image and the third * index selects a color-component: red = 0, green = 1, and blue = * 2 */ public static void viewImage(String title, int[][][] rgbImage) { int[] pixels = new int[rgbImage[0].length * rgbImage.length]; int index = 0; for (int y = 0; y < rgbImage.length; y++) { for (int x = 0; x < rgbImage[0].length; x++) { int color = 255 << 24; for (int c = 0; c < 3; c++) { color |= rgbImage[y][x][c] << (8 * (2 - c)); } pixels[index++] = color; } } Image image = Toolkit.getDefaultToolkit().createImage( new MemoryImageSource(rgbImage[0].length, rgbImage.length, pixels, 0, rgbImage[0].length)); ImageFrame imf = new ImageFrame(image); imf.setTitle("Image - " + title); /* ---------------------- Image methods ------------------------ */ imf.setCanvasSize(rgbImage[0].length, rgbImage.length); imf.pack(); imf.setResizable(false); imf.setVisible(true); } /** * The method viewImage opens a frame and displays a RGB-Image in it. * * @param title * the title showing up in the title bar of the frame * @param grayScaleImage * a two-dimensional array containing the luminance-data of the * image. The first index is the y-coordinate into the image, the * second index is the x-coordinate into the image. */ public static void viewImage(String title, int[][] grayScaleImage) { int[][][] rgbImage = new int[grayScaleImage.length][grayScaleImage[0].length][3]; for (int y = 0; y < grayScaleImage.length; y++) { for (int x = 0; x < grayScaleImage[0].length; x++) { rgbImage[y][x] = ImageGrabber.ImageGrabberUtilities .convertYCbCrToRGB( (double) grayScaleImage[y][x] / 256.0, 0.5, 0.5); } } viewImage(title, rgbImage); } /* ---------------------- Movie methods ------------------------ */ static class MovieFrame extends Frame { private static final long serialVersionUID = 2468836318900893949L; private MovieCanvas movieCanvas = null; private Image image = null; private int[][][] rgbImage = null; private int[][] grayScaleImage = null; private class MovieFrameWindowAdapter extends WindowAdapter { private MovieFrame movieFrame = null; MovieFrameWindowAdapter(MovieFrame movieFrame) { this.movieFrame = movieFrame; } public void windowClosing(WindowEvent e) { if (grayScaleImage != null) { movieFrames.remove(grayScaleImage); } else { movieFrames.remove(rgbImage); } movieFrame.closeFrame(); } } private class MovieCanvas extends Canvas { static final long serialVersionUID = -3517264303987741422L; public void update(Graphics g) { paint(g); } public void paint(Graphics g) { g.drawImage(image, 0, 0, this); } } public MovieFrame(String title, int[][][] rgbImage) { this.rgbImage = rgbImage; initFrame(title); } public MovieFrame(String title, int[][] grayScaleImage) { this.grayScaleImage = grayScaleImage; rgbImage = new int[grayScaleImage.length][grayScaleImage[0].length][3]; initFrame(title); } private void initFrame(String title) { this.addWindowListener(new MovieFrameWindowAdapter(this)); this.setLayout(new BorderLayout()); this.image = createImage(); movieCanvas = new MovieCanvas(); this.add(movieCanvas); this.setTitle("Movie - " + title); this.setCanvasSize(rgbImage[0].length, rgbImage.length); this.pack(); this.setResizable(false); this.setVisible(true); } private Image createImage() { if (grayScaleImage != null) { for (int y = 0; y < grayScaleImage.length; y++) { for (int x = 0; x < grayScaleImage[0].length; x++) { rgbImage[y][x] = ImageGrabber.ImageGrabberUtilities .convertYCbCrToRGB( (double) grayScaleImage[y][x] / 256.0, 0.5, 0.5); } } } int[] pixels = new int[rgbImage[0].length * rgbImage.length]; int index = 0; for (int y = 0; y < rgbImage.length; y++) { for (int x = 0; x < rgbImage[0].length; x++) { int color = 255 << 24; for (int c = 0; c < 3; c++) { color |= rgbImage[y][x][c] << (8 * (2 - c)); } pixels[index++] = color; } } Image image = Toolkit.getDefaultToolkit().createImage( new MemoryImageSource(rgbImage[0].length, rgbImage.length, pixels, 0, rgbImage[0].length)); return image; } public void updateCanvas() { this.image = createImage(); movieCanvas.repaint(); } public void setCanvasSize(int width, int height) { movieCanvas.setPreferredSize(new Dimension(width, height)); } private void closeFrame() { dispose(); } } static Map<Object, MovieFrame> movieFrames = new HashMap<Object, MovieFrame>(); public static MovieFrame viewMovie(String title, int[][][] rgbImage) { MovieFrame mf = null; if (movieFrames.containsKey(rgbImage)) { mf = updateMovie(rgbImage); } else { mf = new MovieFrame(title, rgbImage); movieFrames.put(rgbImage, mf); } return mf; } public static MovieFrame viewMovie(String title, int[][] grayScaleImage) { MovieFrame mf = null; if (movieFrames.containsKey(grayScaleImage)) { mf = updateMovie(grayScaleImage); } else { mf = new MovieFrame(title, grayScaleImage); movieFrames.put(grayScaleImage, mf); } return mf; } public static MovieFrame updateMovie(MovieFrame mf) { mf.updateCanvas(); return mf; } public static MovieFrame updateMovie(int[][][] rgbImage) { MovieFrame mf = null; if (movieFrames.containsKey(rgbImage)) { mf = movieFrames.get(rgbImage); updateMovie(mf); } return mf; } public static MovieFrame updateMovie(int[][] grayScaleImage) { MovieFrame mf = null; if (movieFrames.containsKey(grayScaleImage)) { mf = movieFrames.get(grayScaleImage); updateMovie(mf); } return mf; } }
Code java:1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278
package spinningSquare; import java.awt.Image; import java.awt.Toolkit; import java.awt.image.ImageObserver; import java.awt.image.PixelGrabber; import java.io.File; import java.io.FileNotFoundException; /** * This class provides two static methods for grabbing pixel-information of * images and * * The first one grabGrayScale(String path) converts the image to gray-scale and * returns the gray-scale value of the pixel in a two-dimensional array. The * second one, grabRGB(String path) retrieves all three color-components of the * pixels of the image and returns this information in a three-dimensional * array. * * Two static methods for color-space conversion between the RGB and the YCrCb * colorspaces are also provided. * * @author Volker Christian (volker.christian@fh-hagenberg.at) * @version 1.0 */ public class ImageGrabber { static class ImageGrabberUtilities { private ImageByteArrayObserver imageObserver; private Image image; private int width; private int height; private class ImageByteArrayObserver implements ImageObserver { private boolean errored = false; private ImageGrabberUtilities igu = null; public ImageByteArrayObserver(ImageGrabberUtilities mioi) { igu = mioi; } public boolean imageUpdate(Image img, int infoflags, int x, int y, int width, int height) { if ((infoflags & (ERROR)) != 0) { errored = true; } if ((infoflags & (WIDTH | HEIGHT)) != 0) { if (igu != null) { igu.sizeKnown(); } } boolean done = ((infoflags & (ERROR | FRAMEBITS | ALLBITS)) != 0); return !done; } public boolean isErrored() { return errored; } } private ImageGrabberUtilities() { } private static int[] convertToRGB(int pixel) { int[] RGB = new int[3]; // Alpha = (pixel >> 24) & 0xff; RGB[0] = (int) ((pixel >> 16) & 0xff); RGB[1] = (int) ((pixel >> 8) & 0xff); RGB[2] = (int) ((pixel) & 0xff); return RGB; } private static double[] convertToYCbCr(int pixel) { int[] rgb = convertToRGB(pixel); return convertRGBToYCbCr(rgb[0], rgb[1], rgb[2]); } /** * Transforms the YCbCr color-space into the RGB color-space * * @param Y * the luminance value * @param Cb * the first croma value * @param Cr * the second croma value * @return a integer array containing the three RGB components. The * components have the following indices: red = 0; green = 1; * blue = 2 */ protected static int[] convertYCbCrToRGB(double Y, double Cb, double Cr) { double R = Y + 701.0 / 500.0 * (Cr - 1.0 / 2.0); double G = Y - 25251.0 / 73375.0 * (Cb - 1.0 / 2.0) - 209599.0 / 293500.0 * (Cr - 1.0 / 2.0); double B = Y + 443.0 / 250.0 * (Cb - 1.0 / 2.0); int[] RGB = new int[3]; RGB[0] = (int) (R * 256); RGB[1] = (int) (G * 256); RGB[2] = (int) (B * 256); return RGB; } /** * Transforms the RGB color-space into the YCrCb color-space * * @param r * the red component * @param g * the green component * @param b * the blue component * @return a integer array containing the three YCrCb components. The * components have the following indices: Y = 0; Cr = 1; Cb = 2 */ protected static double[] convertRGBToYCbCr(int r, int g, int b) { double R = ((double) r) / 256.0; double G = ((double) g) / 256.0; double B = ((double) b) / 256.0; double Y = 0.299 * R + 0.587 * G + 0.114 * B; double Cb = (B - Y) / 1.772 + 0.5; double Cr = (R - Y) / 1.402 + 0.5; double[] YCbCr = new double[3]; YCbCr[0] = Y; YCbCr[1] = Cb; YCbCr[2] = Cr; return YCbCr; } private int[] grabPixels() throws InterruptedException { int[] pixels = null; width = image.getWidth(imageObserver); height = image.getHeight(imageObserver); if (width != -1 && height != -1) { pixels = new int[width * height]; PixelGrabber pg = new PixelGrabber(image, 0, 0, width, height, pixels, 0, width); pg.grabPixels(); if ((pg.getStatus() & ImageObserver.ABORT) != 0) { if (imageObserver.isErrored()) { throw new InterruptedException( "Error in grabbing Pixels"); } else { throw new InterruptedException( "Grabbing Pixels aborted"); } } } return pixels; } private int getWidth() { return width; } private int getHeight() { return height; } synchronized private void sizeKnown() { notify(); } synchronized private int[] loadImage(String path) throws InterruptedException, FileNotFoundException { int[] pixels = null; File f = new File(path); if (f.exists()) { image = Toolkit.getDefaultToolkit().createImage(path); imageObserver = new ImageByteArrayObserver(this); Toolkit.getDefaultToolkit().prepareImage(image, -1, -1, imageObserver); wait(); pixels = grabPixels(); } else { String wd = ""; if (path.charAt(0) != System.getProperty("file.separator") .charAt(0)) { wd = System.getProperty("user.dir") + System.getProperty("file.separator").charAt(0); } throw new FileNotFoundException("File " + wd + path + " not found"); } return pixels; } } /** * This method reads a image and provides its RGB color-components in an * three-dimensional array to the caller. * * @param fileName * the path to the image-source used for grabbing * @return a three-dimensional integer array of the RGB values of the * pixels. The first index is the y-coordinate, the second index is * the x-coordinate into the image, and the third index is the * color-component. red = 0; green = 1; blue = 2. * @throws FileNotFoundException * if the image specified in the path-argument does not exist. * @throws InterruptedException * if the grabb-process is interrupted unexpectedly. */ public static int[][][] grabRGB(String fileName) throws FileNotFoundException, InterruptedException { ImageGrabberUtilities igu = new ImageGrabberUtilities(); int[] pixels = igu.loadImage(fileName); int w = igu.getWidth(); int h = igu.getHeight(); int[][][] rgb = new int[h][w][]; for (int y = 0; y < h; y++) { for (int x = 0; x < w; x++) { rgb[y][x] = ImageGrabberUtilities .convertToRGB(pixels[y * w + x]); } } return rgb; } /** * This method reads a image, converts it into gray-scale and provides this * information in a two-dimensional array to the caller. * * @param fileName * the path to the image-source used for grabbing * @return a two-dimensional integer array of the gray-scale values of the * pixels. The first index is the y-coordinate and the second index * is the x-coordinate into the image * @throws FileNotFoundException * if the image specified in the path-argument does not exist. * @throws InterruptedException * if the grabb-process is interrupted unexpectedly. */ public static int[][] grabGrayScale(String fileName) throws FileNotFoundException, InterruptedException { ImageGrabberUtilities igu = new ImageGrabberUtilities(); int[] pixels = igu.loadImage(fileName); int w = igu.getWidth(); int h = igu.getHeight(); int[][] grayScale = new int[h][w]; for (int y = 0; y < h; y++) { for (int x = 0; x < w; x++) { grayScale[y][x] = (int) (256 * ImageGrabberUtilities .convertToYCbCr(pixels[y * w + x])[0]); } } return grayScale; } }
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