List of usage examples for java.lang Math toDegrees
public static double toDegrees(double angrad)
From source file:ExtendedGeneralPath.java
/** * This constructs an unrotated Arc2D from the SVG specification of an * Elliptical arc. To get the final arc you need to apply a rotation * transform such as://w ww . j av a 2s . com * * AffineTransform.getRotateInstance * (angle, arc.getX()+arc.getWidth()/2, arc.getY()+arc.getHeight()/2); */ public static Arc2D computeArc(double x0, double y0, double rx, double ry, double angle, boolean largeArcFlag, boolean sweepFlag, double x, double y) { // // Elliptical arc implementation based on the SVG specification notes // // Compute the half distance between the current and the final point double dx2 = (x0 - x) / 2.0; double dy2 = (y0 - y) / 2.0; // Convert angle from degrees to radians angle = Math.toRadians(angle % 360.0); double cosAngle = Math.cos(angle); double sinAngle = Math.sin(angle); // // Step 1 : Compute (x1, y1) // double x1 = (cosAngle * dx2 + sinAngle * dy2); double y1 = (-sinAngle * dx2 + cosAngle * dy2); // Ensure radii are large enough rx = Math.abs(rx); ry = Math.abs(ry); double Prx = rx * rx; double Pry = ry * ry; double Px1 = x1 * x1; double Py1 = y1 * y1; // check that radii are large enough double radiiCheck = Px1 / Prx + Py1 / Pry; if (radiiCheck > 1) { rx = Math.sqrt(radiiCheck) * rx; ry = Math.sqrt(radiiCheck) * ry; Prx = rx * rx; Pry = ry * ry; } // // Step 2 : Compute (cx1, cy1) // double sign = (largeArcFlag == sweepFlag) ? -1 : 1; double sq = ((Prx * Pry) - (Prx * Py1) - (Pry * Px1)) / ((Prx * Py1) + (Pry * Px1)); sq = (sq < 0) ? 0 : sq; double coef = (sign * Math.sqrt(sq)); double cx1 = coef * ((rx * y1) / ry); double cy1 = coef * -((ry * x1) / rx); // // Step 3 : Compute (cx, cy) from (cx1, cy1) // double sx2 = (x0 + x) / 2.0; double sy2 = (y0 + y) / 2.0; double cx = sx2 + (cosAngle * cx1 - sinAngle * cy1); double cy = sy2 + (sinAngle * cx1 + cosAngle * cy1); // // Step 4 : Compute the angleStart (angle1) and the angleExtent (dangle) // double ux = (x1 - cx1) / rx; double uy = (y1 - cy1) / ry; double vx = (-x1 - cx1) / rx; double vy = (-y1 - cy1) / ry; double p, n; // Compute the angle start n = Math.sqrt((ux * ux) + (uy * uy)); p = ux; // (1 * ux) + (0 * uy) sign = (uy < 0) ? -1.0 : 1.0; double angleStart = Math.toDegrees(sign * Math.acos(p / n)); // Compute the angle extent n = Math.sqrt((ux * ux + uy * uy) * (vx * vx + vy * vy)); p = ux * vx + uy * vy; sign = (ux * vy - uy * vx < 0) ? -1.0 : 1.0; double angleExtent = Math.toDegrees(sign * Math.acos(p / n)); if (!sweepFlag && angleExtent > 0) { angleExtent -= 360f; } else if (sweepFlag && angleExtent < 0) { angleExtent += 360f; } angleExtent %= 360f; angleStart %= 360f; // // We can now build the resulting Arc2D in double precision // Arc2D.Double arc = new Arc2D.Double(); arc.x = cx - rx; arc.y = cy - ry; arc.width = rx * 2.0; arc.height = ry * 2.0; arc.start = -angleStart; arc.extent = -angleExtent; return arc; }
From source file:com.taobao.weex.ui.animation.TransformParser.java
public static Map<Property<View, Float>, Float> parseTransForm(@Nullable String rawTransform, final int width, final int height, final int viewportW) { if (!TextUtils.isEmpty(rawTransform)) { FunctionParser<Property<View, Float>, Float> parser = new FunctionParser<>(rawTransform, new FunctionParser.Mapper<Property<View, Float>, Float>() { @Override/* w ww . j a va2s . c om*/ public Map<Property<View, Float>, Float> map(String functionName, List<String> raw) { if (raw != null && !raw.isEmpty()) { if (wxToAndroidMap.containsKey(functionName)) { return convertParam(width, height, viewportW, wxToAndroidMap.get(functionName), raw); } } return new HashMap<>(); } private Map<Property<View, Float>, Float> convertParam(int width, int height, int viewportW, @NonNull List<Property<View, Float>> propertyList, @NonNull List<String> rawValue) { Map<Property<View, Float>, Float> result = WXDataStructureUtil .newHashMapWithExpectedSize(propertyList.size()); List<Float> convertedList = new ArrayList<>(propertyList.size()); if (propertyList.contains(View.ROTATION) || propertyList.contains(View.ROTATION_X) || propertyList.contains(View.ROTATION_Y)) { convertedList.addAll(parseRotationZ(rawValue)); } else if (propertyList.contains(View.TRANSLATION_X) || propertyList.contains(View.TRANSLATION_Y)) { convertedList .addAll(parseTranslation(propertyList, width, height, rawValue, viewportW)); } else if (propertyList.contains(View.SCALE_X) || propertyList.contains(View.SCALE_Y)) { convertedList.addAll(parseScale(propertyList.size(), rawValue)); } else if (propertyList.contains(CameraDistanceProperty.getInstance())) { convertedList.add(parseCameraDistance(rawValue)); } if (propertyList.size() == convertedList.size()) { for (int i = 0; i < propertyList.size(); i++) { result.put(propertyList.get(i), convertedList.get(i)); } } return result; } private List<Float> parseScale(int size, @NonNull List<String> rawValue) { List<Float> convertedList = new ArrayList<>(rawValue.size() * 2); List<Float> rawFloat = new ArrayList<>(rawValue.size()); for (String item : rawValue) { rawFloat.add(WXUtils.fastGetFloat(item)); } convertedList.addAll(rawFloat); if (size != 1 && rawValue.size() == 1) { convertedList.addAll(rawFloat); } return convertedList; } private @NonNull List<Float> parseRotationZ(@NonNull List<String> rawValue) { List<Float> convertedList = new ArrayList<>(1); int suffix; for (String raw : rawValue) { if ((suffix = raw.lastIndexOf(DEG)) != -1) { convertedList.add(WXUtils.fastGetFloat(raw.substring(0, suffix))); } else { convertedList.add((float) Math.toDegrees(Double.parseDouble(raw))); } } return convertedList; } /** * As "translate(50%, 25%)" or "translate(25px, 30px)" both are valid, * parsing translate is complicated than other method. * Add your waste time here if you try to optimize this method like {@link #parseScale(int, List)} * Time: 0.5h */ private List<Float> parseTranslation(List<Property<View, Float>> propertyList, int width, int height, @NonNull List<String> rawValue, int viewportW) { List<Float> convertedList = new ArrayList<>(2); String first = rawValue.get(0); if (propertyList.size() == 1) { parseSingleTranslation(propertyList, width, height, convertedList, first, viewportW); } else { parseDoubleTranslation(width, height, rawValue, convertedList, first, viewportW); } return convertedList; } private void parseSingleTranslation(List<Property<View, Float>> propertyList, int width, int height, List<Float> convertedList, String first, int viewportW) { if (propertyList.contains(View.TRANSLATION_X)) { convertedList.add(parsePercentOrPx(first, width, viewportW)); } else if (propertyList.contains(View.TRANSLATION_Y)) { convertedList.add(parsePercentOrPx(first, height, viewportW)); } } private void parseDoubleTranslation(int width, int height, @NonNull List<String> rawValue, List<Float> convertedList, String first, int viewportW) { String second; if (rawValue.size() == 1) { second = first; } else { second = rawValue.get(1); } convertedList.add(parsePercentOrPx(first, width, viewportW)); convertedList.add(parsePercentOrPx(second, height, viewportW)); } private Float parseCameraDistance(List<String> rawValue) { float ret = Float.MAX_VALUE; if (rawValue.size() == 1) { float value = WXViewUtils.getRealPxByWidth(WXUtils.getFloat(rawValue.get(0)), viewportW); float scale = WXEnvironment.getApplication().getResources() .getDisplayMetrics().density; if (!Float.isNaN(value) && value > 0) { ret = value * scale; } } return ret; } }); return parser.parse(); } return new LinkedHashMap<>(); }
From source file:com.piusvelte.mosaic.android.MosaicMap.java
private double getOffsetLatitude(double lat, double offset) { return lat + Math.toDegrees(offset / Mosaic.EARTH_RADIUS); }
From source file:com.piusvelte.mosaic.android.MosaicMap.java
private double getOffsetLongitude(double lat, double lng, double offset) { return lng + Math.toDegrees(offset / (Mosaic.EARTH_RADIUS * Math.cos(Math.toRadians(lat)))); }
From source file:com.example.casthelloworld.MainActivity.java
@Override public void onSensorChanged(SensorEvent sensorEvent) { if (sensorEvent.accuracy == SensorManager.SENSOR_STATUS_UNRELIABLE) { return;//from www . j a v a 2 s.co m } SensorManager.getRotationMatrixFromVector(mRotationMatrix, sensorEvent.values); SensorManager.remapCoordinateSystem(mRotationMatrix, SensorManager.AXIS_X, SensorManager.AXIS_Z, mRotationMatrix); SensorManager.getOrientation(mRotationMatrix, orientationVals); orientationVals[2] = (float) Math.toDegrees(orientationVals[2]); float Roll = orientationVals[2]; if (Roll < -85 && Roll > -95 && lastVal != 0.0f) { // Log.d("Middle: ", "" + Roll); lastVal = 0.0f; try { directionMessage.put("direction", (double) lastVal); } catch (JSONException e) { e.printStackTrace(); } mGameManagerClient.sendGameMessage(directionMessage); } else if (Roll <= -95 && Roll > -105 && lastVal != -0.2f) { // Log.d("Left", "" + Roll); lastVal = -0.2f; try { directionMessage.put("direction", (double) lastVal); } catch (JSONException e) { e.printStackTrace(); } mGameManagerClient.sendGameMessage(directionMessage); } else if (Roll >= -85 && Roll < -75 && lastVal != 0.2f) { // Log.d("Right", "" + Roll); lastVal = 0.2f; try { directionMessage.put("direction", (double) lastVal); } catch (JSONException e) { e.printStackTrace(); } mGameManagerClient.sendGameMessage(directionMessage); } else if (Roll <= -105 && Roll > -115 && lastVal != -0.4f) { // Log.d("Left", "" + Roll); lastVal = -0.4f; try { directionMessage.put("direction", (double) lastVal); } catch (JSONException e) { e.printStackTrace(); } mGameManagerClient.sendGameMessage(directionMessage); } else if (Roll >= -75 && Roll < -65 && lastVal != 0.4f) { // Log.d("Right", "" + Roll); lastVal = 0.4f; try { directionMessage.put("direction", (double) lastVal); } catch (JSONException e) { e.printStackTrace(); } mGameManagerClient.sendGameMessage(directionMessage); } else if (Roll <= -115 && Roll > -125 && lastVal != -0.6f) { // Log.d("Left", "" + Roll); lastVal = -0.6f; try { directionMessage.put("direction", (double) lastVal); } catch (JSONException e) { e.printStackTrace(); } mGameManagerClient.sendGameMessage(directionMessage); } else if (Roll >= -65 && Roll < -55 && lastVal != 0.6f) { // Log.d("Right", "" + Roll); lastVal = 0.6f; try { directionMessage.put("direction", (double) lastVal); } catch (JSONException e) { e.printStackTrace(); } mGameManagerClient.sendGameMessage(directionMessage); } else if (Roll <= -125 && Roll > -135 && lastVal != -0.8f) { // Log.d("Left", "" + Roll); lastVal = -0.8f; try { directionMessage.put("direction", (double) lastVal); } catch (JSONException e) { e.printStackTrace(); } mGameManagerClient.sendGameMessage(directionMessage); } else if (Roll >= -55 && Roll < -45 && lastVal != 0.8f) { // Log.d("Right", "" + Roll); lastVal = 0.8f; try { directionMessage.put("direction", (double) lastVal); } catch (JSONException e) { e.printStackTrace(); } mGameManagerClient.sendGameMessage(directionMessage); } else if (Roll <= -135 && lastVal != -1.0f && lastVal != 1.0f) { // Log.d("Left", "" + Roll); lastVal = -1.0f; try { directionMessage.put("direction", (double) lastVal); } catch (JSONException e) { e.printStackTrace(); } mGameManagerClient.sendGameMessage(directionMessage); } else if (Roll >= -45 && lastVal != 1.0f && lastVal != -1.0f) { // Log.d("Right", "" + Roll); lastVal = 1.0f; try { directionMessage.put("direction", (double) lastVal); } catch (JSONException e) { e.printStackTrace(); } mGameManagerClient.sendGameMessage(directionMessage); } }
From source file:ShapeTest.java
public Shape makeShape(Point2D[] p) { double centerX = (p[0].getX() + p[1].getX()) / 2; double centerY = (p[0].getY() + p[1].getY()) / 2; double width = Math.abs(p[1].getX() - p[0].getX()); double height = Math.abs(p[1].getY() - p[0].getY()); double skewedStartAngle = Math .toDegrees(Math.atan2(-(p[2].getY() - centerY) * width, (p[2].getX() - centerX) * height)); double skewedEndAngle = Math .toDegrees(Math.atan2(-(p[3].getY() - centerY) * width, (p[3].getX() - centerX) * height)); double skewedAngleDifference = skewedEndAngle - skewedStartAngle; if (skewedStartAngle < 0) skewedStartAngle += 360;/*from w w w . ja v a 2 s . c o m*/ if (skewedAngleDifference < 0) skewedAngleDifference += 360; Arc2D s = new Arc2D.Double(0, 0, 0, 0, skewedStartAngle, skewedAngleDifference, Arc2D.OPEN); s.setFrameFromDiagonal(p[0], p[1]); GeneralPath g = new GeneralPath(); g.append(s, false); Rectangle2D r = new Rectangle2D.Double(); r.setFrameFromDiagonal(p[0], p[1]); g.append(r, false); Point2D center = new Point2D.Double(centerX, centerY); g.append(new Line2D.Double(center, p[2]), false); g.append(new Line2D.Double(center, p[3]), false); return g; }
From source file:org.gearvrf.controls.util.VRSamplesTouchPadGesturesDetector.java
private SwipeDirection getSwipeDirection(float x1, float y1, float x2, float y2) { Double angle = Math.toDegrees(Math.atan2(y1 - y2, x2 - x1)); if (angle > 45 && angle <= 135) { return SwipeDirection.Up; } else if (angle >= 135 && angle < 180 || angle < -135 && angle > -180) { return SwipeDirection.Ignore; // left to right } else if (angle < -45 && angle >= -135) { return SwipeDirection.Down; } else if (angle > -45 && angle <= 45) { return SwipeDirection.Ignore; // right to left }// w w w .j a v a 2 s . c o m return SwipeDirection.Ignore; }
From source file:com.bc.jexp.impl.DefaultNamespace.java
private void registerDefaultFunctions() { registerFunction(new AbstractFunction.D("sin", 1) { public double evalD(final EvalEnv env, final Term[] args) { return FastMath.sin(args[0].evalD(env)); }/*from w w w . j av a 2 s . c o m*/ }); registerFunction(new AbstractFunction.D("cos", 1) { public double evalD(final EvalEnv env, final Term[] args) { return FastMath.cos(args[0].evalD(env)); } }); registerFunction(new AbstractFunction.D("tan", 1) { public double evalD(final EvalEnv env, final Term[] args) { return FastMath.tan(args[0].evalD(env)); } }); registerFunction(new AbstractFunction.D("asin", 1) { public double evalD(final EvalEnv env, final Term[] args) { return FastMath.asin(args[0].evalD(env)); } }); registerFunction(new AbstractFunction.D("acos", 1) { public double evalD(final EvalEnv env, final Term[] args) { return FastMath.acos(args[0].evalD(env)); } }); registerFunction(new AbstractFunction.D("atan", 1) { public double evalD(final EvalEnv env, final Term[] args) { return FastMath.atan(args[0].evalD(env)); } }); registerFunction(new AbstractFunction.D("atan2", 2) { public double evalD(final EvalEnv env, final Term[] args) { return Math.atan2(args[0].evalD(env), args[1].evalD(env)); } }); registerFunction(new AbstractFunction.D("log", 1) { public double evalD(final EvalEnv env, final Term[] args) { return Math.log(args[0].evalD(env)); } }); registerFunction(new AbstractFunction.D("log10", 1) { public double evalD(EvalEnv env, Term[] args) throws EvalException { return Math.log10(args[0].evalD(env)); } }); registerFunction(new AbstractFunction.D("exp", 1) { public double evalD(final EvalEnv env, final Term[] args) { return FastMath.exp(args[0].evalD(env)); } }); registerFunction(new AbstractFunction.D("exp10", 1) { public double evalD(EvalEnv env, Term[] args) throws EvalException { return FastMath.pow(10.0, args[0].evalD(env)); } }); registerFunction(new AbstractFunction.D("sqr", 1) { public double evalD(final EvalEnv env, final Term[] args) { double v = args[0].evalD(env); return v * v; } }); registerFunction(new AbstractFunction.D("sqrt", 1) { public double evalD(final EvalEnv env, final Term[] args) { return Math.sqrt(args[0].evalD(env)); } }); registerFunction(new AbstractFunction.D("pow", 2) { public double evalD(final EvalEnv env, final Term[] args) { return FastMath.pow(args[0].evalD(env), args[1].evalD(env)); } }); registerFunction(new AbstractFunction.I("min", 2) { public int evalI(final EvalEnv env, final Term[] args) { return Math.min(args[0].evalI(env), args[1].evalI(env)); } }); registerFunction(new AbstractFunction.D("min", 2) { public double evalD(final EvalEnv env, final Term[] args) { return Math.min(args[0].evalD(env), args[1].evalD(env)); } }); registerFunction(new AbstractFunction.I("max", 2) { public int evalI(final EvalEnv env, final Term[] args) { return Math.max(args[0].evalI(env), args[1].evalI(env)); } }); registerFunction(new AbstractFunction.D("max", 2) { public double evalD(final EvalEnv env, final Term[] args) { return Math.max(args[0].evalD(env), args[1].evalD(env)); } }); registerFunction(new AbstractFunction.D("floor", 1) { public double evalD(EvalEnv env, Term[] args) throws EvalException { return Math.floor(args[0].evalD(env)); } }); registerFunction(new AbstractFunction.D("round", 1) { public double evalD(EvalEnv env, Term[] args) throws EvalException { return Math.round(args[0].evalD(env)); } }); registerFunction(new AbstractFunction.D("ceil", 1) { public double evalD(EvalEnv env, Term[] args) throws EvalException { return Math.ceil(args[0].evalD(env)); } }); registerFunction(new AbstractFunction.D("rint", 1) { public double evalD(EvalEnv env, Term[] args) throws EvalException { return Math.rint(args[0].evalD(env)); } }); registerFunction(new AbstractFunction.I("sign", 1) { public int evalI(final EvalEnv env, final Term[] args) { return ExtMath.sign(args[0].evalI(env)); } }); registerFunction(new AbstractFunction.D("sign", 1) { public double evalD(final EvalEnv env, final Term[] args) { return ExtMath.sign(args[0].evalD(env)); } }); registerFunction(new AbstractFunction.I("abs", 1) { public int evalI(final EvalEnv env, final Term[] args) { return Math.abs(args[0].evalI(env)); } }); registerFunction(new AbstractFunction.D("abs", 1) { public double evalD(final EvalEnv env, final Term[] args) { return Math.abs(args[0].evalD(env)); } }); registerFunction(new AbstractFunction.D("deg", 1) { public double evalD(final EvalEnv env, final Term[] args) { return Math.toDegrees(args[0].evalD(env)); } }); registerFunction(new AbstractFunction.D("rad", 1) { public double evalD(final EvalEnv env, final Term[] args) { return Math.toRadians(args[0].evalD(env)); } }); registerFunction(new AbstractFunction.D("ampl", 2) { public double evalD(final EvalEnv env, final Term[] args) { final double a = args[0].evalD(env); final double b = args[1].evalD(env); return Math.sqrt(a * a + b * b); } }); registerFunction(new AbstractFunction.D("phase", 2) { public double evalD(final EvalEnv env, final Term[] args) { final double a = args[0].evalD(env); final double b = args[1].evalD(env); return Math.atan2(b, a); } }); registerFunction(new AbstractFunction.B("feq", 2) { public boolean evalB(EvalEnv env, Term[] args) throws EvalException { final double x1 = args[0].evalD(env); final double x2 = args[1].evalD(env); return ExtMath.feq(x1, x2, EPS); } }); registerFunction(new AbstractFunction.B("feq", 3) { public boolean evalB(EvalEnv env, Term[] args) throws EvalException { final double x1 = args[0].evalD(env); final double x2 = args[1].evalD(env); final double eps = args[2].evalD(env); return ExtMath.feq(x1, x2, eps); } }); registerFunction(new AbstractFunction.B("fneq", 2) { public boolean evalB(EvalEnv env, Term[] args) throws EvalException { final double x1 = args[0].evalD(env); final double x2 = args[1].evalD(env); return ExtMath.fneq(x1, x2, EPS); } }); registerFunction(new AbstractFunction.B("fneq", 3) { public boolean evalB(EvalEnv env, Term[] args) throws EvalException { final double x1 = args[0].evalD(env); final double x2 = args[1].evalD(env); final double eps = args[2].evalD(env); return ExtMath.fneq(x1, x2, eps); } }); registerFunction(new AbstractFunction.B("inf", 1) { public boolean evalB(EvalEnv env, Term[] args) throws EvalException { return Double.isInfinite(args[0].evalD(env)); } }); registerFunction(new AbstractFunction.B("nan", 1) { public boolean evalB(EvalEnv env, Term[] args) throws EvalException { return Double.isNaN(args[0].evalD(env)); } }); registerFunction(new AbstractFunction.D("distance", -1) { public double evalD(final EvalEnv env, final Term[] args) { double sqrSum = 0.0; final int n = args.length / 2; for (int i = 0; i < n; i++) { final double v = args[i + n].evalD(env) - args[i].evalD(env); sqrSum += v * v; } return Math.sqrt(sqrSum); } }); registerFunction(new AbstractFunction.D("distance_deriv", -1) { public double evalD(final EvalEnv env, final Term[] args) { double sqrSum = 0.0; final int n = args.length / 2; for (int i = 0; i < n - 1; i++) { final double v1 = args[i + 1].evalD(env) - args[i].evalD(env); final double v2 = args[i + n + 1].evalD(env) - args[i + n].evalD(env); sqrSum += (v1 - v2) * (v1 - v2); } return Math.sqrt(sqrSum); } }); registerFunction(new AbstractFunction.D("distance_integ", -1) { public double evalD(final EvalEnv env, final Term[] args) { double sqrSum = 0.0; double v1Sum = 0.0; double v2Sum = 0.0; final int n = args.length / 2; for (int i = 0; i < n; i++) { v1Sum += args[i].evalD(env); v2Sum += args[i + n].evalD(env); sqrSum += (v2Sum - v1Sum) * (v2Sum - v1Sum); } return Math.sqrt(sqrSum); } }); registerFunction(new AbstractFunction.B("inrange", -1) { public boolean evalB(final EvalEnv env, final Term[] args) { final int n1 = args.length / 3; final int n2 = n1 + args.length / 3; for (int i = 0; i < n1; i++) { final double v = args[i].evalD(env); final double v1 = args[i + n1].evalD(env); final double v2 = args[i + n2].evalD(env); if (v < v1 || v > v2) { return false; } } return true; } }); registerFunction(new AbstractFunction.B("inrange_deriv", -1) { public boolean evalB(final EvalEnv env, final Term[] args) { final int n1 = args.length / 3; final int n2 = 2 * n1; for (int i = 0; i < n1 - 1; i++) { final double v = args[i + 1].evalD(env) - args[i].evalD(env); final double v1 = args[i + n1 + 1].evalD(env) - args[i + n1].evalD(env); final double v2 = args[i + n2 + 1].evalD(env) - args[i + n2].evalD(env); if (v < v1 || v > v2) { return false; } } return true; } }); registerFunction(new AbstractFunction.B("inrange_integ", -1) { public boolean evalB(final EvalEnv env, final Term[] args) { final int n1 = args.length / 3; final int n2 = 2 * n1; double vSum = 0.0; double v1Sum = 0.0; double v2Sum = 0.0; for (int i = 0; i < n1; i++) { vSum += args[i].evalD(env); v1Sum += args[i + n1].evalD(env); v2Sum += args[i + n2].evalD(env); if (vSum < v1Sum || vSum > v2Sum) { return false; } } return true; } }); }
From source file:com.nextgis.maplibui.fragment.CompassFragment.java
public boolean onTouch(View v, MotionEvent event) { switch (event.getAction()) { case MotionEvent.ACTION_DOWN: mDownX = event.getX();// w w w. ja v a2 s . c o m mDownY = event.getY(); return true; case MotionEvent.ACTION_MOVE: float upX = event.getX(); float upY = event.getY(); double downR = Math.atan2(v.getHeight() / 2 - mDownY, mDownX - v.getWidth() / 2); int angle1 = (int) Math.toDegrees(downR); double upR = Math.atan2(v.getHeight() / 2 - upY, upX - v.getWidth() / 2); int angle2 = (int) Math.toDegrees(upR); this.rotateCompass(angle1 - angle2); if (mIsVibrationOn) { mVibrator.vibrate(5); } // update starting point for next move event mDownX = upX; mDownY = upY; return true; } return false; }
From source file:io.github.data4all.handler.TagSuggestionHandler.java
/** * Get a bounding box of the location./*from w w w. ja v a 2s . co m*/ * * @param lat * latitude of the location * @param lon * longitude of the location * @param radius * distance to bounds from location * @return a boundingBox */ private static double[] getBoundingBox(double lat, double lon, double radius) { final double result[] = new double[4]; result[0] = lat - Math.toDegrees(radius / (double) EARTH_RADIUS); // s result[1] = lon - Math.toDegrees(radius / (double) EARTH_RADIUS / Math.cos(Math.toRadians(lat))); // w result[2] = lat + Math.toDegrees(radius / (double) EARTH_RADIUS); // n result[3] = lon + Math.toDegrees(radius / (double) EARTH_RADIUS / Math.cos(Math.toRadians(lat))); // e return result; }