本文整理了Java中java.lang.Math.tan()方法的一些代码示例，展示了Math.tan()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Math.tan()方法的具体详情如下：
包路径：java.lang.Math
类名称：Math
方法名：tan
[英]Returns the closest double approximation of the tangent of the argument. The returned result is within 1 ulp (unit in the last place) of the real result.
Special cases:
代码示例来源：origin: libgdx/libgdx
public static float[] createPerspectiveMatrix (int fieldOfViewVertical, float aspectRatio, float minimumClearance,
float maximumClearance) {
double fieldOfViewInRad = fieldOfViewVertical * Math.PI / 180.0;
return new float[] {(float)(Math.tan(fieldOfViewInRad) / aspectRatio), 0, 0, 0, 0,
(float)(1 / Math.tan(fieldOfViewVertical * Math.PI / 180.0)), 0, 0, 0, 0,
(minimumClearance + maximumClearance) / (minimumClearance - maximumClearance), -1, 0, 0,
2 * minimumClearance * maximumClearance / (minimumClearance - maximumClearance), 0};
}代码示例来源：origin: libgdx/libgdx
public static float[] createPerspectiveMatrix (int fieldOfViewVertical, float aspectRatio, float minimumClearance,
float maximumClearance) {
double fieldOfViewInRad = fieldOfViewVertical * Math.PI / 180.0;
return new float[] {(float)(Math.tan(fieldOfViewInRad) / aspectRatio), 0, 0, 0, 0,
(float)(1 / Math.tan(fieldOfViewVertical * Math.PI / 180.0)), 0, 0, 0, 0,
(minimumClearance + maximumClearance) / (minimumClearance - maximumClearance), -1, 0, 0,
2 * minimumClearance * maximumClearance / (minimumClearance - maximumClearance), 0};
}代码示例来源：origin: Bilibili/DanmakuFlameMaster
@Override
public void setSize(int width, int height) {
this.width = width;
this.height = height;
this.locationZ = (float) (width / 2f / Math.tan((Math.PI / 180) * (55f / 2f)));
}代码示例来源：origin: nickbutcher/plaid
private static float toTangent(float arcInDegrees) {
if (arcInDegrees < 0 || arcInDegrees > 90) {
throw new IllegalArgumentException("Arc must be between 0 and 90 degrees");
}
return (float) Math.tan(Math.toRadians(arcInDegrees / 2));
}代码示例来源：origin: google/ExoPlayer
private float calculateFieldOfViewInYDirection(float aspect) {
boolean landscapeMode = aspect > 1;
if (landscapeMode) {
double halfFovX = FIELD_OF_VIEW_DEGREES / 2;
double tanY = Math.tan(Math.toRadians(halfFovX)) / aspect;
double halfFovY = Math.toDegrees(Math.atan(tanY));
return (float) (halfFovY * 2);
} else {
return FIELD_OF_VIEW_DEGREES;
}
}
}代码示例来源：origin: andkulikov/Transitions-Everywhere
private static float toTangent(float arcInDegrees) {
if (arcInDegrees < 0 || arcInDegrees > 90) {
throw new IllegalArgumentException("Arc must be between 0 and 90 degrees");
}
return (float) Math.tan(Math.toRadians(arcInDegrees / 2));
}代码示例来源：origin: apache/incubator-druid
@Override
protected ExprEval eval(double param)
{
return ExprEval.of(Math.tan(param));
}
}代码示例来源：origin: kevin-wayne/algs4
/**
* Returns a random real number from the Cauchy distribution.
*
* @return a random real number from the Cauchy distribution.
*/
public static double cauchy() {
return Math.tan(Math.PI * (uniform() - 0.5));
}代码示例来源：origin: guoguibing/librec
/**
* Return a real number with a Cauchy distribution.
*
* @return a real number with a Cauchy distribution
*/
public static double cauchy() {
return Math.tan(Math.PI * (uniform() - 0.5));
}代码示例来源：origin: stackoverflow.com
Camera.Parameters p = camera.getParameters();
int zoom = p.getZoomRatios().get(p.getZoom()).intValue();
Camera.Size sz = p.getPreviewSize();
double aspect = (double) sz.width / (double) sz.height;
double thetaV = Math.toRadians(p.getVerticalViewAngle());
double thetaH = 2d * Math.atan(aspect * Math.tan(thetaV / 2));
thetaV = 2d * Math.atan(100d * Math.tan(thetaV / 2d) / zoom);
thetaH = 2d * Math.atan(100d * Math.tan(thetaH / 2d) / zoom);代码示例来源：origin: apache/hive
/**
* Take Tangent of a
*/
@Override
protected DoubleWritable doEvaluate(DoubleWritable a) {
result.set(Math.tan(a.get()));
return result;
}代码示例来源：origin: MovingBlocks/Terasology
private static Matrix4f createPerspectiveProjectionMatrix(float fov, float zNear, float zFar) {
float aspectRatio = (float) Display.getWidth() / Display.getHeight();
float fovY = (float) (2 * Math.atan2(Math.tan(0.5 * fov * TeraMath.DEG_TO_RAD), aspectRatio));
return MatrixUtils.createPerspectiveProjectionMatrix(fovY, aspectRatio, zNear, zFar);
}代码示例来源：origin: neo4j/neo4j
public static DoubleValue cot( AnyValue in )
{
if ( in instanceof NumberValue )
{
return doubleValue( 1.0 / Math.tan( ((NumberValue) in).doubleValue() ) );
}
else
{
throw needsNumbers( "cot()" );
}
}代码示例来源：origin: neo4j/neo4j
public static DoubleValue tan( AnyValue in )
{
if ( in instanceof NumberValue )
{
return doubleValue( Math.tan( ((NumberValue) in).doubleValue() ) );
}
else
{
throw needsNumbers( "tan()" );
}
}代码示例来源：origin: prestodb/presto
@Test
public void testTan()
{
for (double doubleValue : DOUBLE_VALUES) {
assertFunction("tan(" + doubleValue + ")", DOUBLE, Math.tan(doubleValue));
assertFunction("tan(REAL '" + (float) doubleValue + "')", DOUBLE, Math.tan((float) doubleValue));
}
assertFunction("tan(NULL)", DOUBLE, null);
}代码示例来源：origin: prestodb/presto
@Description("tangent")
@ScalarFunction
@SqlType(StandardTypes.DOUBLE)
public static double tan(@SqlType(StandardTypes.DOUBLE) double num)
{
return Math.tan(num);
}代码示例来源：origin: stackoverflow.com
private static double zoomAngle(double degrees, int zoom) {
double theta = Math.toRadians(degrees);
return 2d * Math.atan(100d * Math.tan(theta / 2d) / zoom);
}
Camera.Parameters p = camera.getParameters();
int zoom = p.getZoomRatios().get(p.getZoom()).intValue();
double thetaH = zoomAngle(p.getHorizontalViewAngle(), zoom);
double thetaV = zoomAngle(p.getVerticalViewAngle(), zoom);代码示例来源：origin: pentaho/pentaho-kettle
public Value tan() throws KettleValueException {
if ( isNull() ) {
return this;
}
if ( isNumeric() ) {
setValue( Math.tan( getNumber() ) );
} else {
throw new KettleValueException( "Function TAN only works on a number" );
}
return this;
}代码示例来源：origin: apache/hive
@Test
public void testVectorTan() throws HiveException {
VectorizedRowBatch b = getVectorizedRowBatchDoubleInDoubleOut();
DoubleColumnVector resultV = (DoubleColumnVector) b.cols[1];
b.cols[0].noNulls = true;
VectorExpression expr = new FuncTanDoubleToDouble(0, 1);
expr.evaluate(b);
Assert.assertEquals(Math.tan(0.5d), resultV.vector[4]);
}代码示例来源：origin: jfoenixadmin/JFoenix
private Point2D makeControlPoint(final double endX, final double endY, final Circle circle, final int numSegments, int direction) {
final double controlPointDistance = (4.0 / 3.0) * Math.tan(Math.PI / (2 * numSegments)) * circle.getRadius();
final Point2D center = new Point2D(circle.getCenterX(), circle.getCenterY());
final Point2D end = new Point2D(endX, endY);
Point2D perp = rotate(center, end, direction * Math.PI / 2.);
Point2D diff = perp.subtract(end);
diff = diff.normalize();
diff = scale(diff, controlPointDistance);
return end.add(diff);
}内容来源于网络，如有侵权，请联系作者删除！