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@ -34,84 +34,71 @@ import java.util.Set;
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public class CircleTool {
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private static short[][] circles = new short[0][];
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private static List<int[]> circles = new ArrayList<>();
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private static short[] getCircleCoords(final short radius) {
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if ((radius - 1) < circles.length) return circles[radius - 1];
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private static int[] getCircleCoords(final short radius) {
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if (radius - 1 < circles.size()) return circles.get(radius - 1);
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// read some lines from known circles
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Set<String> crds = new HashSet<String>();
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//crds.add("0|0");
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String co;
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for (short i = (short) Math.max(0, circles.length - 2); i < circles.length; i++) {
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for (short j = 0; j < circles[i].length; j = (short) (j + 2)) {
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co = circles[i][j] + "|" + circles[i][j + 1];
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if (!(crds.contains(co))) crds.add(co);
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}
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Set<Integer> crds = new HashSet<>();
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Integer co;
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for (short i = (short) Math.max(0, circles.size() - 1); i < circles.size(); i++) {
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int[] circle = circles.get(i);
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for (int c: circle) crds.add(c);
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}
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// copy old circles into new array
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short[][] newCircles = new short[radius][];
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System.arraycopy(circles, 0, newCircles, 0, circles.length);
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// compute more lines in new circles
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short x, y;
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List<short[]> crc;
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List<Integer> crc;
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short r1;
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for (short r = (short) circles.length; r < newCircles.length; r++) {
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for (short r = (short) circles.size(); r < radius; r++) {
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r1 = (short) (r + 1);
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crc = new ArrayList<short[]>();
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crc = new ArrayList<>();
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for (short a = 0; a < 2 * (r + 1); a++) {
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x = (short) (r1 * Math.cos(RasterPlotter.PI4 * a / r1));
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y = (short) (r1 * Math.sin(RasterPlotter.PI4 * a / r1));
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co = x + "|" + y;
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co = x << 16 | y;
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if (!(crds.contains(co))) {
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crc.add(new short[]{x, y});
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crc.add(co);
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crds.add(co);
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}
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x = (short) ((r + 0.5) * Math.cos(RasterPlotter.PI4 * a / r1));
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y = (short) ((r + 0.5) * Math.sin(RasterPlotter.PI4 * a / r1));
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co = x + "|" + y;
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co = x << 16 | y;
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if (!(crds.contains(co))) {
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crc.add(new short[]{x, y});
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crc.add(co);
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crds.add(co);
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}
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}
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// put coordinates into array
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//System.out.print("Radius " + r + " => " + crc.size() + " points: ");
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newCircles[r] = new short[2 * (crc.size() - 1)];
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short[] coords;
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short i2 = 0;
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int[] newCircle = new int[crc.size() - 1];
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int coords;
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for (short i = 0; i < crc.size() - 1; i++) {
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coords = crc.get(i);
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newCircles[r][i2++] = coords[0];
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newCircles[r][i2++] = coords[1];
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//System.out.print(circles[r][i][0] + "," +circles[r][i][1] + "; ");
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newCircle[i] = coords;
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}
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//System.out.println();
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circles.add(newCircle);
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}
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crc = null;
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crds = null;
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// move newCircles to circles array
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circles = newCircles;
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newCircles = null;
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// finally return wanted slice
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return circles[radius - 1];
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return circles.get(radius - 1);
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}
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public static void circle(final RasterPlotter matrix, final int xc, final int yc, final int radius, final int intensity) {
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if (radius == 0) {
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//matrix.plot(xc, yc, 100);
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} else {
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final short[] c = getCircleCoords((short) radius);
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final int[] c = getCircleCoords((short) radius);
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short x, y;
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short limit = (short) (c.length / 2);
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short i2 = 0;
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short limit = (short) c.length;
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int co;
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for (short i = 0; i < limit; i++) {
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x = c[i2++];
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y = c[i2++];
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co = c[i];
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x = (short) (0xffff & (co >> 16));
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y = (short) (0xffff & co);
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matrix.plot(xc + x , yc - y - 1, intensity); // quadrant 1
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matrix.plot(xc - x + 1, yc - y - 1, intensity); // quadrant 2
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matrix.plot(xc + x , yc + y , intensity); // quadrant 4
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@ -130,21 +117,24 @@ public class CircleTool {
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if (radius == 0) {
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//matrix.plot(xc, yc, 100);
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} else {
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final short[] c = getCircleCoords((short) radius);
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final short q = (short) (c.length / 2);
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final int[] c = getCircleCoords((short) radius);
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final short q = (short) c.length;
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final short q2 = (short) (q * 2);
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final short q3 = (short) (q * 3);
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final short q4 = (short) (q * 4);
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final short[] c4x = new short[q4];
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final short[] c4y = new short[q4];
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short a0, a1, a2, a3, b0, b1;
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int co;
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for (short i = 0; i < q; i++) {
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b0 = (short) (2 * (i ));
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b1 = (short) (2 * (q - 1 - i));
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a0 = c[b0 ];
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a1 = c[b0 + 1];
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a2 = c[b1 ];
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a3 = c[b1 + 1];
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b0 = i;
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b1 = (short) (q - 1 - i);
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co = c[b0];
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a0 = (short) (0xffff & (co >> 16));
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a1 = (short) (0xffff & co);
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co = c[b1];
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a2 = (short) (0xffff & (co >> 16));
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a3 = (short) (0xffff & co);
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c4x[i ] = a0 ; // quadrant 1
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c4y[i ] = (short) (-a1 - 1); // quadrant 1
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c4x[i + q ] = (short) ( 1 - a2); // quadrant 2
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Michael Peter Christen
11 years ago