List of usage examples for java.lang Math atan
public static double atan(double a)
From source file:Main.java
public static void main(String[] args) { // get a variable x which is equal to PI/2 double x = Math.PI / 2; // convert x to radians x = Math.toRadians(x);/*from ww w . j av a2 s . c om*/ // get the arc tangent of x System.out.println("Math.atan(" + x + ")" + Math.atan(x)); }
From source file:TrigFun.java
public static void main(String[] args) { double rads, degs, tanA, coTanA; // Obtain angle in degrees from user degs = 120d;// w w w . j av a2 s.c om // Convert degrees to radian rads = Math.toRadians(degs); // Calculate tangent tanA = Math.tan(rads); System.out.println("Tangent = " + tanA); // Calculate cotangent coTanA = 1.0 / Math.tan(rads); System.out.println("Cotangent = " + coTanA); // Calculate arc-tangent rads = Math.atan(tanA); degs = Math.toDegrees(rads); System.out.println("Arc tangent: " + degs); // Calculate arc-cotangent rads = Math.atan(1 / coTanA); degs = Math.toDegrees(rads); System.out.println("Arc cotangent: " + degs); }
From source file:TrigonometricDemo.java
public static void main(String[] args) { double degrees = 45.0; double radians = Math.toRadians(degrees); System.out.format("The value of pi is %.4f%n", Math.PI); System.out.format("The sine of %.1f degrees is %.4f%n", degrees, Math.sin(radians)); System.out.format("The cosine of %.1f degrees is %.4f%n", degrees, Math.cos(radians)); System.out.format("The tangent of %.1f degrees is %.4f%n", degrees, Math.tan(radians)); System.out.format("The arcsine of %.4f is %.4f degrees %n", Math.sin(radians), Math.toDegrees(Math.asin(Math.sin(radians)))); System.out.format("The arccosine of %.4f is %.4f degrees %n", Math.cos(radians), Math.toDegrees(Math.acos(Math.cos(radians)))); System.out.format("The arctangent of %.4f is %.4f degrees %n", Math.tan(radians), Math.toDegrees(Math.atan(Math.tan(radians)))); }
From source file:TrigonometricDemo.java
public static void main(String[] args) { double degrees = 45.0; double radians = Math.toRadians(degrees); System.out.println("The value of pi is " + Math.PI); System.out.println("The sine of " + degrees + " is " + Math.sin(radians)); System.out.println("The cosine of " + degrees + " is " + Math.cos(radians)); System.out.println("The tangent of " + degrees + " is " + Math.tan(radians)); System.out.println("The arc sine of " + Math.sin(radians) + " is " + Math.toDegrees(Math.asin(Math.sin(radians))) + " degrees"); System.out.println("The arc cosine of " + Math.cos(radians) + " is " + Math.toDegrees(Math.acos(Math.cos(radians))) + " degrees"); System.out.println("The arc tangent of " + Math.tan(radians) + " is " + Math.toDegrees(Math.atan(Math.tan(radians))) + " degrees"); }
From source file:FaceRatios.java
@SuppressWarnings("serial") public static void main(String[] args) { int r = FSDK.ActivateLibrary(FACE_SDK_LICENSE); if (r == FSDK.FSDKE_OK) { FSDK.Initialize();/* w w w .j a va2s . c o m*/ FSDK.SetFaceDetectionParameters(true, true, 384); Map<String, Map<String, ArrayList<Double>>> faceProperties = new HashMap<>(); for (String directory : new File(FACE_DIRECTORY).list()) { if (new File(FACE_DIRECTORY + directory).isDirectory()) { Map<String, ArrayList<Double>> properties = new HashMap<String, ArrayList<Double>>() { { for (String property : propertyNames) put(property, new ArrayList<Double>()); } }; File[] files = new File(FACE_DIRECTORY + directory).listFiles(); System.out.println("Analyzing " + directory + " with " + files.length + " files\n"); for (File file : files) { if (file.isFile()) { HImage imageHandle = new HImage(); FSDK.LoadImageFromFileW(imageHandle, file.getAbsolutePath()); FSDK.TFacePosition.ByReference facePosition = new FSDK.TFacePosition.ByReference(); if (FSDK.DetectFace(imageHandle, facePosition) == FSDK.FSDKE_OK) { FSDK_Features.ByReference facialFeatures = new FSDK_Features.ByReference(); FSDK.DetectFacialFeaturesInRegion(imageHandle, (FSDK.TFacePosition) facePosition, facialFeatures); Point[] featurePoints = new Point[FSDK.FSDK_FACIAL_FEATURE_COUNT]; for (int i = 0; i < FSDK.FSDK_FACIAL_FEATURE_COUNT; i++) { featurePoints[i] = new Point(0, 0); featurePoints[i].x = facialFeatures.features[i].x; featurePoints[i].y = facialFeatures.features[i].y; } double eyeDistance = featureDistance(featurePoints, FeatureID.LEFT_EYE, FeatureID.RIGHT_EYE); double rightEyeSize = featureDistance(featurePoints, FeatureID.RIGHT_EYE_INNER_CORNER, FeatureID.RIGHT_EYE_OUTER_CORNER); double leftEyeSize = featureDistance(featurePoints, FeatureID.LEFT_EYE_INNER_CORNER, FeatureID.LEFT_EYE_OUTER_CORNER); double averageEyeSize = (rightEyeSize + leftEyeSize) / 2; double mouthLength = featureDistance(featurePoints, FeatureID.MOUTH_RIGHT_CORNER, FeatureID.MOUTH_LEFT_CORNER); double mouthHeight = featureDistance(featurePoints, FeatureID.MOUTH_BOTTOM, FeatureID.MOUTH_TOP); double noseHeight = featureDistance(featurePoints, FeatureID.NOSE_BOTTOM, FeatureID.NOSE_BRIDGE); double chinHeight = featureDistance(featurePoints, FeatureID.CHIN_BOTTOM, FeatureID.MOUTH_BOTTOM); double chinToBridgeHeight = featureDistance(featurePoints, FeatureID.CHIN_BOTTOM, FeatureID.NOSE_BRIDGE); double faceContourLeft = (featurePoints[FeatureID.CHIN_BOTTOM.getIndex()].getY() - featurePoints[FeatureID.FACE_CONTOUR2.getIndex()].getY()) / (featurePoints[FeatureID.CHIN_BOTTOM.getIndex()].getX() - featurePoints[FeatureID.FACE_CONTOUR2.getIndex()].getX()); double faceContourRight = (featurePoints[FeatureID.CHIN_BOTTOM.getIndex()].getY() - featurePoints[FeatureID.FACE_CONTOUR12.getIndex()].getY()) / (featurePoints[FeatureID.CHIN_BOTTOM.getIndex()].getX() - featurePoints[FeatureID.FACE_CONTOUR12.getIndex()].getX()); double bridgeLeftEyeDistance = featureDistance(featurePoints, FeatureID.LEFT_EYE_INNER_CORNER, FeatureID.NOSE_BRIDGE); double bridgeRightEyeDistance = featureDistance(featurePoints, FeatureID.RIGHT_EYE_INNER_CORNER, FeatureID.NOSE_BRIDGE); properties.get("eyeSize/eyeDistance").add(averageEyeSize / eyeDistance); properties.get("eyeSizeDisparity") .add(Math.abs(leftEyeSize - rightEyeSize) / averageEyeSize); properties.get("bridgeToEyeDisparity") .add(Math.abs(bridgeLeftEyeDistance - bridgeRightEyeDistance) / ((bridgeLeftEyeDistance + bridgeRightEyeDistance) / 2)); properties.get("eyeDistance/mouthLength").add(eyeDistance / mouthLength); properties.get("eyeDistance/noseHeight").add(eyeDistance / noseHeight); properties.get("eyeSize/mouthLength").add(eyeDistance / mouthLength); properties.get("eyeSize/noseHeight").add(eyeDistance / noseHeight); properties.get("mouthLength/mouthHeight").add(mouthLength / mouthHeight); properties.get("chinHeight/noseHeight").add(chinHeight / noseHeight); properties.get("chinHeight/chinToBridgeHeight") .add(chinHeight / chinToBridgeHeight); properties.get("noseHeight/chinToBridgeHeight") .add(noseHeight / chinToBridgeHeight); properties.get("mouthHeight/chinToBridgeHeight") .add(mouthHeight / chinToBridgeHeight); properties.get("faceCountourAngle") .add(Math.toDegrees(Math.atan((faceContourLeft - faceContourRight) / (1 + faceContourLeft * faceContourRight)))); } FSDK.FreeImage(imageHandle); } } System.out.format("%32s\t%8s\t%8s\t%3s%n", "Property", "", "", "c"); System.out.println(new String(new char[76]).replace("\0", "-")); ArrayList<Entry<String, ArrayList<Double>>> propertyList = new ArrayList<>( properties.entrySet()); Collections.sort(propertyList, new Comparator<Entry<String, ArrayList<Double>>>() { @Override public int compare(Entry<String, ArrayList<Double>> arg0, Entry<String, ArrayList<Double>> arg1) { DescriptiveStatistics dStats0 = new DescriptiveStatistics(listToArray(arg0.getValue())); DescriptiveStatistics dStats1 = new DescriptiveStatistics(listToArray(arg1.getValue())); return new Double(dStats0.getStandardDeviation() / dStats0.getMean()) .compareTo(dStats1.getStandardDeviation() / dStats1.getMean()); } }); for (Entry<String, ArrayList<Double>> property : propertyList) { DescriptiveStatistics dStats = new DescriptiveStatistics(listToArray(property.getValue())); System.out.format("%32s\t%4f\t%4f\t%3s%n", property.getKey(), dStats.getMean(), dStats.getStandardDeviation(), Math.round(dStats.getStandardDeviation() / dStats.getMean() * 100) + "%"); } System.out.println("\n"); faceProperties.put(directory, properties); } } for (String propertyName : propertyNames) { DefaultBoxAndWhiskerCategoryDataset dataset = new DefaultBoxAndWhiskerCategoryDataset(); for (Entry<String, Map<String, ArrayList<Double>>> face : faceProperties.entrySet()) { dataset.add(face.getValue().get(propertyName), "Default Series", face.getKey()); } PropertyBoxWhisker plot = new PropertyBoxWhisker(propertyName, dataset); plot.pack(); plot.setVisible(true); } } }
From source file:Main.java
public static double acot(double value) { return Math.atan(1.0 / value); }
From source file:Main.java
public static float atan(float x) { return (float) Math.atan(x); }
From source file:Main.java
public static double tile2lat(int y, int z) { double n = Math.PI - (2.0 * Math.PI * y) / Math.pow(2.0, z); return Math.toDegrees(Math.atan(Math.sinh(n))); }
From source file:Main.java
/** * Calculate the angle to the target location from local. *///from w ww. j a va 2 s .c o m private static double getAngle(final double startheight, final double endheight, final float poslenght) { double radian = Math.atan(Math.abs((endheight - startheight)) / poslenght); double degree = Math.toDegrees(radian); if (startheight > endheight) { return -degree; } return degree; }
From source file:Main.java
/** * Calculate the angle to the target location from local. *///from w ww . j a v a 2s .c o m private static double getAngle(final double startheight, final double endheight, final float poslength) { double radian = Math.atan(Math.abs((endheight - startheight)) / poslength); double degree = Math.toDegrees(radian); if (startheight > endheight) { return -degree; } return degree; }