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plotting

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serso 2011-12-05 00:26:20 +04:00
parent 75b4d1adc7
commit e2deb7fab3
1 changed files with 6 additions and 11 deletions
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17
src/main/java/org/solovyev/android/calculator/CalculatorPlotActivity.java
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@ -272,8 +272,6 @@ public class CalculatorPlotActivity extends Activity {
Double prevRealY = null; Double prevRealY = null;
Double prevX = null; Double prevX = null;
Double prevImagY = null; Double prevImagY = null;
boolean wasRealSingularity = false;
boolean wasImagSingularity = false;
while (x <= max) { while (x <= max) {
boolean needToCalculateRealY = needToCalculate(realSeries, step, x); boolean needToCalculateRealY = needToCalculate(realSeries, step, x);
@ -283,7 +281,7 @@ public class CalculatorPlotActivity extends Activity {
final Complex c = unwrap(numeric); final Complex c = unwrap(numeric);
Double y = prepareY(c.realPart()); Double y = prepareY(c.realPart());
if (y != null) { if (y != null) {
wasRealSingularity = addSingularityPoint(realSeries, prevX, x, prevRealY, y, wasRealSingularity); addSingularityPoint(realSeries, prevX, x, prevRealY, y);
realSeries.add(x, y); realSeries.add(x, y);
prevRealY = y; prevRealY = y;
prevX = x; prevX = x;
@ -293,7 +291,7 @@ public class CalculatorPlotActivity extends Activity {
if (needToCalculateImagY) { if (needToCalculateImagY) {
y = prepareY(c.imaginaryPart()); y = prepareY(c.imaginaryPart());
if (y != null) { if (y != null) {
wasImagSingularity = addSingularityPoint(imagSeries, prevX, x, prevImagY, y, wasImagSingularity); addSingularityPoint(imagSeries, prevX, x, prevImagY, y);
imagSeries.add(x, y); imagSeries.add(x, y);
prevImagY = y; prevImagY = y;
prevX = x; prevX = x;
@ -309,7 +307,7 @@ public class CalculatorPlotActivity extends Activity {
final Complex c = unwrap(numeric); final Complex c = unwrap(numeric);
Double y = prepareY(c.imaginaryPart()); Double y = prepareY(c.imaginaryPart());
if (y != null) { if (y != null) {
wasImagSingularity = addSingularityPoint(imagSeries, prevX, x, prevImagY, y, wasImagSingularity); addSingularityPoint(imagSeries, prevX, x, prevImagY, y);
imagSeries.add(x, y); imagSeries.add(x, y);
prevImagY = y; prevImagY = y;
prevX = x; prevX = x;
@ -333,17 +331,14 @@ public class CalculatorPlotActivity extends Activity {
// todo serso: UNABLE TO PLOT i/ln(t)!!! // todo serso: UNABLE TO PLOT i/ln(t)!!!
private static boolean addSingularityPoint(@NotNull XYSeries series, @Nullable Double prevX, @NotNull Double x, @Nullable Double prevY, @NotNull Double y, boolean wasSingularity) { private static void addSingularityPoint(@NotNull XYSeries series, @Nullable Double prevX, @NotNull Double x, @Nullable Double prevY, @NotNull Double y) {
if ( !wasSingularity && prevX != null && prevY != null) { if (prevX != null && prevY != null) {
if ( y > 0.00000000001d && prevY > 0.00000000001d && (Math.abs(prevY / y) > MAX_Y_DIFF || Math.abs(y / prevY) > MAX_Y_DIFF)) { if ( (Math.abs(y) > 0.00000000001d && Math.abs(prevY / y) > MAX_Y_DIFF) || (Math.abs(prevY) > 0.00000000001d && Math.abs(y / prevY) > MAX_Y_DIFF)) {
//Log.d(CalculatorPlotActivity.class.getName(), "Singularity! Prev point: (" + prevX + ", " + prevY + "), current point: (" +x+ ", " + y +")" ); //Log.d(CalculatorPlotActivity.class.getName(), "Singularity! Prev point: (" + prevX + ", " + prevY + "), current point: (" +x+ ", " + y +")" );
//Log.d(CalculatorPlotActivity.class.getName(), String.valueOf(prevX + Math.abs(x - prevX) / 2) + ", null"); //Log.d(CalculatorPlotActivity.class.getName(), String.valueOf(prevX + Math.abs(x - prevX) / 2) + ", null");
series.add( prevX + Math.abs(x - prevX) / 2, MathHelper.NULL_VALUE); series.add( prevX + Math.abs(x - prevX) / 2, MathHelper.NULL_VALUE);
return true;
} }
} }
return false;
} }
private static boolean needToCalculate(@NotNull XYSeries series, double step, double x) { private static boolean needToCalculate(@NotNull XYSeries series, double step, double x) {