package org.flixel;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.utils.Array;
import com.badlogic.gdx.utils.reflect.ClassReflection;
import com.badlogic.gdx.utils.reflect.ReflectionException;
public class FlxU
{
/**
* Opens a web page in a new tab or window.
* MUST be called from the UI thread or else badness.
*
* @param URL The address of the web page.
*/
static public void openURL(String URL)
{
Gdx.net.openURI(URL);
}
/**
* Calculate the absolute value of a number.
*
* @param Value Any number.
*
* @return The absolute value of that number.
*/
static public float abs(float Value)
{
return (Value>0)?Value:-Value;
}
/**
* Round down to the next whole number. E.g. floor(1.7) == 1, and floor(-2.7) == -2.
*
* @param Value Any number.
*
* @return The rounded value of that number.
*/
static public int floor(float Value)
{
int number = (int)Value;
return (Value>0)?(number):((number!=Value)?(number-1):(number));
}
/**
* Round up to the next whole number. E.g. ceil(1.3) == 2, and ceil(-2.3) == -3.
*
* @param Value Any number.
*
* @return The rounded value of that number.
*/
static public int ceil(float Value)
{
int number = (int)Value;
return (Value>0)?((number!=Value)?(number+1):(number)):(number);
}
/**
* Round to the closest whole number. E.g. round(1.7) == 2, and round(-2.3) == -2.
*
* @param Value Any number.
*
* @return The rounded value of that number.
*/
static public int round(float Value)
{
return (int)(Value+((Value>0)?0.5f:-0.5f));
}
/**
* Figure out which number is smaller.
*
* @param Number1 Any number.
* @param Number2 Any number.
*
* @return The smaller of the two numbers.
*/
static public float min(float Number1,float Number2)
{
return (Number1 <= Number2)?Number1:Number2;
}
/**
* Figure out which number is larger.
*
* @param Number1 Any number.
* @param Number2 Any number.
*
* @return The larger of the two numbers.
*/
static public float max(float Number1,float Number2)
{
return (Number1 >= Number2)?Number1:Number2;
}
/**
* Bound a number by a minimum and maximum.
* Ensures that this number is no smaller than the minimum,
* and no larger than the maximum.
*
* @param Value Any number.
* @param Min Any number.
* @param Max Any number.
*
* @return The bounded value of the number.
*/
static public float bound(float Value,float Min,float Max)
{
float lowerBound = (Value<Min)?Min:Value;
return (lowerBound>Max)?Max:lowerBound;
}
/**
* Generates a random number based on the seed provided.
*
* @param Seed A number between 0 and 1, used to generate a predictable random number (very optional).
*
* @return A <code>Number</code> between 0 and 1.
*/
static public float srand(float Seed)
{
return FlxU.abs((float)((69621 * (int)(Seed * 0x7FFFFFFF)) % 0x7FFFFFFF) / 0x7FFFFFFF);
}
/**
* Shuffles the entries in an array into a new random order.
* <code>FlxG.shuffle()</code> is deterministic and safe for use with replays/recordings.
* HOWEVER, <code>FlxU.shuffle()</code> is NOT deterministic and unsafe for use with replays/recordings.
*
* @param Objects A Flash <code>Array</code> object containing...stuff.
* @param HowManyTimes How many swaps to perform during the shuffle operation. Good rule of thumb is 2-4 times as many objects are in the list.
*
* @return The same Flash <code>Array</code> object that you passed in in the first place.
*/
static public <T> Array<T> shuffle(Array<T> Objects,int HowManyTimes)
{
int i = 0;
int index1;
int index2;
T object;
while(i < HowManyTimes)
{
index1 = (int)(Math.random()*Objects.size);
index2 = (int)(Math.random()*Objects.size);
object = Objects.get(index2);
Objects.set(index2, Objects.get(index1));
Objects.set(index1, object);
i++;
}
return Objects;
}
/**
* Fetch a random entry from the given array.
* Will return null if random selection is missing, or array has no entries.
* <code>FlxG.getRandom()</code> is deterministic and safe for use with replays/recordings.
* HOWEVER, <code>FlxU.getRandom()</code> is NOT deterministic and unsafe for use with replays/recordings.
*
* @param Objects A Flash array of objects.
* @param StartIndex Optional offset off the front of the array. Default value is 0, or the beginning of the array.
* @param Length Optional restriction on the number of values you want to randomly select from.
*
* @return The random object that was selected.
*/
static public <T> T getRandom(Array<T> Objects,int StartIndex,int Length)
{
if(Objects != null)
{
int l = Length;
if((l == 0) || (l > Objects.size - StartIndex))
l = Objects.size - StartIndex;
if(l > 0)
return Objects.get(StartIndex + (int)(Math.random()*l));
}
return null;
}
/**
* Fetch a random entry from the given array.
* Will return null if random selection is missing, or array has no entries.
* <code>FlxG.getRandom()</code> is deterministic and safe for use with replays/recordings.
* HOWEVER, <code>FlxU.getRandom()</code> is NOT deterministic and unsafe for use with replays/recordings.
*
* @param Objects A Flash array of objects.
* @param StartIndex Optional offset off the front of the array. Default value is 0, or the beginning of the array.
*
* @return The random object that was selected.
*/
static public <T> T getRandom(Array<T> Objects,int StartIndex)
{
return getRandom(Objects,StartIndex,0);
}
/**
* Fetch a random entry from the given array.
* Will return null if random selection is missing, or array has no entries.
* <code>FlxG.getRandom()</code> is deterministic and safe for use with replays/recordings.
* HOWEVER, <code>FlxU.getRandom()</code> is NOT deterministic and unsafe for use with replays/recordings.
*
* @param Objects A Flash array of objects.
*
* @return The random object that was selected.
*/
static public <T> T getRandom(Array<T> Objects)
{
return getRandom(Objects,0,0);
}
/**
* Just grabs the current "ticks" or time in milliseconds that has passed since the Flash Player started up.
* Useful for finding out how long it takes to execute specific blocks of code.
*
* @return A <code>uint</code> to be passed to <code>FlxU.endProfile()</code>.
*/
static public long getTicks()
{
return System.currentTimeMillis();
}
/**
* Takes two "ticks" timestamps and formats them into the number of seconds that passed as a String.
* Useful for logging, debugging, the watch window, or whatever else.
*
* @param StartTicks The first timestamp from the system.
* @param EndTicks The second timestamp from the system.
*
* @return A <code>String</code> containing the formatted time elapsed information.
*/
static public String formatTicks(int StartTicks, int EndTicks)
{
return ((EndTicks-StartTicks)/1000)+"s";
}
/**
* Generate a Flash <code>uint</code> color from RGBA components.
*
* @param Red The red component, between 0 and 255.
* @param Green The green component, between 0 and 255.
* @param Blue The blue component, between 0 and 255.
* @param Alpha How opaque the color should be, either between 0 and 1 or 0 and 255.
*
* @return The color as a <code>uint</code>.
*/
static public int makeColor(int Red, int Green, int Blue, float Alpha)
{
return ((int)((Alpha>1)?Alpha:(Alpha * 255)) & 0xFF) << 24 | (Red & 0xFF) << 16 | (Green & 0xFF) << 8 | (Blue & 0xFF);
}
/**
* Generate a Flash <code>uint</code> color from RGBA components.
*
* @param Red The red component, between 0 and 255.
* @param Green The green component, between 0 and 255.
* @param Blue The blue component, between 0 and 255.
*
* @return The color as a <code>uint</code>.
*/
static public int makeColor(int Red, int Green, int Blue)
{
return makeColor(Red, Green, Blue, 1.0f);
}
/**
* Generate a Flash <code>uint</code> color from HSB components.
*
* @param Hue A number between 0 and 360, indicating position on a color strip or wheel.
* @param Saturation A number between 0 and 1, indicating how colorful or gray the color should be. 0 is gray, 1 is vibrant.
* @param Brightness A number between 0 and 1, indicating how bright the color should be. 0 is black, 1 is full bright.
* @param Alpha How opaque the color should be, either between 0 and 1 or 0 and 255.
*
* @return The color as a <code>uint</code>.
*/
static public int makeColorHSB(float Hue,float Saturation,float Brightness,float Alpha)
{
float red;
float green;
float blue;
if(Saturation == 0.0f)
{
red = Brightness;
green = Brightness;
blue = Brightness;
}
else
{
if(Hue == 360)
Hue = 0;
int slice = (int) (Hue/60);
float hf = Hue/60 - slice;
float aa = Brightness*(1 - Saturation);
float bb = Brightness*(1 - Saturation*hf);
float cc = Brightness*(1 - Saturation*(1.0f - hf));
switch (slice)
{
case 0: red = Brightness; green = cc; blue = aa; break;
case 1: red = bb; green = Brightness; blue = aa; break;
case 2: red = aa; green = Brightness; blue = cc; break;
case 3: red = aa; green = bb; blue = Brightness; break;
case 4: red = cc; green = aa; blue = Brightness; break;
case 5: red = Brightness; green = aa; blue = bb; break;
default: red = 0; green = 0; blue = 0; break;
}
}
return ((int)((Alpha>1)?Alpha:(Alpha * 255)) & 0xFF) << 24 | (int)(red*255) << 16 | (int)(green*255) << 8 | (int)(blue*255);
}
/**
* Generate a Flash <code>uint</code> color from HSB components.
*
* @param Hue A number between 0 and 360, indicating position on a color strip or wheel.
* @param Saturation A number between 0 and 1, indicating how colorful or gray the color should be. 0 is gray, 1 is vibrant.
* @param Brightness A number between 0 and 1, indicating how bright the color should be. 0 is black, 1 is full bright.
*
* @return The color as a <code>uint</code>.
*/
public int makeColorHSB(int Hue,int Saturation,int Brightness)
{
return makeColorHSB(Hue,Saturation,Brightness,1.0f);
}
/**
* Loads an array with the RGBA values of a Flash <code>uint</code> color.
* RGB values are stored 0-255. Alpha is stored as a floating point number between 0 and 1.
*
* @param Color The color you want to break into components.
* @param Results An optional parameter, allows you to use an array that already exists in memory to store the result.
*
* @return An <code>Array</code> object containing the Red, Green, Blue and Alpha values of the given color.
*/
static public float[] getRGBA(int Color,float[] Results)
{
if(Results == null)
Results = new float[4];
Results[0] = (Color >> 16) & 0xFF;
Results[1] = (Color >> 8) & 0xFF;
Results[2] = Color & 0xFF;
Results[3] = (float)((Color >> 24) & 0xFF) / 255;
return Results;
}
/**
* Loads an array with the RGBA values of a Flash <code>uint</code> color.
* RGB values are stored 0-255. Alpha is stored as a floating point number between 0 and 1.
*
* @param Color The color you want to break into components.
*
* @return An <code>Array</code> object containing the Red, Green, Blue and Alpha values of the given color.
*/
static public float[] getRGBA(int Color)
{
return getRGBA(Color,null);
}
/**
* Loads an array with the HSB values of a Flash <code>uint</code> color.
* Hue is a value between 0 and 360. Saturation, Brightness and Alpha
* are as floating point numbers between 0 and 1.
*
* @param Color The color you want to break into components.
* @param Results An optional parameter, allows you to use an array that already exists in memory to store the result.
*
* @return An <code>Array</code> object containing the Red, Green, Blue and Alpha values of the given color.
*/
static public float[] getHSB(int Color,float[] Results)
{
if(Results == null)
Results = new float[4];
float red = (float)((Color >> 16) & 0xFF) / 255;
float green = (float)((Color >> 8) & 0xFF) / 255;
float blue = (float)((Color) & 0xFF) / 255;
float m = (red>green)?red:green;
float dmax = (m>blue)?m:blue;
m = (red>green)?green:red;
float dmin = (m>blue)?blue:m;
float range = dmax - dmin;
Results[2] = dmax;
Results[1] = 0;
Results[0] = 0;
if(dmax != 0)
Results[1] = range / dmax;
if(Results[1] != 0)
{
if(red == dmax)
Results[0] = (green - blue) / range;
else if(green == dmax)
Results[0] = 2 + (blue - red) / range;
else if(blue == dmax)
Results[0] = 4 + (red - green) / range;
Results[0] *= 60;
if(Results[0] < 0)
Results[0] += 360;
}
Results[3] = (float)((Color >> 24) & 0xFF) / 255;
return Results;
}
/**
* Loads an array with the HSB values of a Flash <code>uint</code> color.
* Hue is a value between 0 and 360. Saturation, Brightness and Alpha
* are as floating point numbers between 0 and 1.
*
* @param Color The color you want to break into components.
*
* @return An <code>Array</code> object containing the Red, Green, Blue and Alpha values of the given color.
*/
static public float[] getHSB(int Color)
{
return getHSB(Color,null);
}
/**
* Converts a AARRGGBB format color to a libgdx/OpenGL rgba8888 format color.
*
* @param Color The color to convert.
*
* @return The converted color.
*/
static public int argbToRgba(int Color)
{
return (Color << 8) | (Color >>> 24);
}
/**
* Multiplies two colors together. Colors should be in AARRGGBB format.
*
* @param Color1 The first color to multiply.
* @param Color2 The second color to multiply.
*
* @return The multiplied colors.
*/
static public int multiplyColors(int Color1, int Color2)
{
int r = (int) (((Color1 >> 16) & 0xFF) * ((Color2 >> 16) & 0xFF) * 0.00392f);
int g = (int) (((Color1 >> 8) & 0xFF) * ((Color2 >> 8) & 0xFF) * 0.00392f);
int b = (int) ((Color1 & 0xFF) * (Color2 & 0xFF) * 0.00392f);
int a = (int) (((Color1 >> 24) & 0xFF) * ((Color2 >> 24) & 0xFF) * 0.00392f);
return FlxU.makeColor(r, g, b, a);
}
/**
* Format seconds as minutes with a colon, an optionally with milliseconds too.
*
* @param Seconds The number of seconds (for example, time remaining, time spent, etc).
* @param ShowMS Whether to show milliseconds after a "." as well. Default value is false.
*
* @return A nicely formatted <code>String</code>, like "1:03".
*/
static public String formatTime(float Seconds,boolean ShowMS)
{
String timeString = (int)(Seconds/60) + ":";
int timeStringHelper = (int)(Seconds)%60;
if(timeStringHelper < 10)
timeString += "0";
timeString += timeStringHelper;
if(ShowMS)
{
timeString += ".";
timeStringHelper = (int)((Seconds-(int)(Seconds))*100);
if(timeStringHelper < 10)
timeString += "0";
timeString += timeStringHelper;
}
return timeString;
}
/**
* Format seconds as minutes with a colon, an optionally with milliseconds too.
*
* @param Seconds The number of seconds (for example, time remaining, time spent, etc).
*
* @return A nicely formatted <code>String</code>, like "1:03".
*/
static public String formatTime(int Seconds)
{
return formatTime(Seconds, false);
}
/**
* Generate a comma-separated string from an array.
* Especially useful for tracing or other debug output.
*
* @param AnyArray Any <code>Array</code> object.
*
* @return A comma-separated <code>String</code> containing the <code>.toString()</code> output of each element in the array.
*/
static public <T> String formatArray(Array<T> AnyArray)
{
if((AnyArray == null) || (AnyArray.size <= 0))
return "";
String string = AnyArray.get(0).toString();
int i = 1;
int l = AnyArray.size;
while(i < l)
string += ", " + AnyArray.get(i++).toString();
return string;
}
/**
* Automatically commas and decimals in the right places for displaying money amounts.
* Does not include a dollar sign or anything, so doesn't really do much
* if you call say <code>var results:String = FlxU.formatMoney(10,false);</code>
* However, very handy for displaying large sums or decimal money values.
*
* @param Amount How much moneys (in dollars, or the equivalent "main" currency - i.e. not cents).
* @param ShowDecimal Whether to show the decimals/cents component. Default value is true.
* @param EnglishStyle Major quantities (thousands, millions, etc) separated by commas, and decimal by a period. Default value is true.
*
* @return A nicely formatted <code>String</code>. Does not include a dollar sign or anything!
*/
static public String formatMoney(float Amount,boolean ShowDecimal,boolean EnglishStyle)
{
int helper;
int amount = (int)Amount;
String string = "";
String comma = "";
String zeroes = "";
while(amount > 0)
{
if((string.length() > 0) && comma.length() <= 0)
{
if(EnglishStyle)
comma = ",";
else
comma = ".";
}
zeroes = "";
helper = amount - (int)(amount/1000f)*1000;
amount /= 1000f;
if(amount > 0)
{
if(helper < 100)
zeroes += "0";
if(helper < 10)
zeroes += "0";
}
string = zeroes + helper + comma + string;
}
if(ShowDecimal)
{
amount = (int)(Amount*100)-((int)(Amount)*100);
string += (EnglishStyle?".":",") + amount;
if(amount < 10)
string += "0";
}
return string;
}
/**
* Automatically commas and decimals in the right places for displaying money amounts.
* Does not include a dollar sign or anything, so doesn't really do much
* if you call say <code>var results:String = FlxU.formatMoney(10,false);</code>
* However, very handy for displaying large sums or decimal money values.
*
* @param Amount How much moneys (in dollars, or the equivalent "main" currency - i.e. not cents).
* @param ShowDecimal Whether to show the decimals/cents component. Default value is true.
*
* @return A nicely formatted <code>String</code>. Does not include a dollar sign or anything!
*/
static public String formatMoney(int Amount,boolean ShowDecimal)
{
return formatMoney(Amount,ShowDecimal,true);
}
/**
* Automatically commas and decimals in the right places for displaying money amounts.
* Does not include a dollar sign or anything, so doesn't really do much
* if you call say <code>var results:String = FlxU.formatMoney(10,false);</code>
* However, very handy for displaying large sums or decimal money values.
*
* @param Amount How much moneys (in dollars, or the equivalent "main" currency - i.e. not cents).
*
* @return A nicely formatted <code>String</code>. Does not include a dollar sign or anything!
*/
static public String formatMoney(int Amount)
{
return formatMoney(Amount,true,true);
}
/**
* Get the <code>String</code> name of any <code>Object</code>.
*
* @param Obj The <code>Object</code> object in question.
* @param Simple Returns only the class name, not the package or packages.
*
* @return The name of the <code>Class</code> as a <code>String</code> object.
*/
static public String getClassName(Object Obj,boolean Simple)
{
return Simple ? ClassReflection.getSimpleName(Obj.getClass()) : Obj.getClass().getName();
}
/**
* Get the <code>String</code> name of any <code>Object</code>.
*
* @param Obj The <code>Object</code> object in question.
*
* @return The name of the <code>Class</code> as a <code>String</code> object.
*/
static public String getClassName(Object Obj)
{
return getClassName(Obj,false);
}
/**
* Check to see if two objects have the same class name.
*
* @param Object1 The first object you want to check.
* @param Object2 The second object you want to check.
*
* @return Whether they have the same class name or not.
*/
static public boolean compareClassNames(Object Object1,Object Object2)
{
return getClassName(Object1).equals(getClassName(Object2));
}
/**
* Look up a <code>Class</code> object by its string name.
*
* @param Name The <code>String</code> name of the <code>Class</code> you are interested in.
*
* @return A <code>Class</code> object.
*/
static public Class<?> getClass(String Name)
{
try
{
return ClassReflection.forName(Name);
}
catch(ReflectionException e)
{
throw new RuntimeException(e);
}
}
/**
* A tween-like function that takes a starting velocity
* and some other factors and returns an altered velocity.
*
* @param Velocity Any component of velocity (e.g. 20).
* @param Acceleration Rate at which the velocity is changing.
* @param Drag Really kind of a deceleration, this is how much the velocity changes if Acceleration is not set.
* @param Max An absolute value cap for the velocity.
*
* @return The altered Velocity value.
*/
static public float computeVelocity(float Velocity, float Acceleration, float Drag, float Max)
{
if(Acceleration != 0)
Velocity += Acceleration*FlxG.elapsed;
else if(Drag != 0)
{
float drag = Drag*FlxG.elapsed;
if(Velocity - drag > 0)
Velocity = Velocity - drag;
else if(Velocity + drag < 0)
Velocity += drag;
else
Velocity = 0;
}
if((Velocity != 0) && (Max != 10000))
{
if(Velocity > Max)
Velocity = Max;
else if(Velocity < -Max)
Velocity = -Max;
}
return Velocity;
}
/**
* A tween-like function that takes a starting velocity
* and some other factors and returns an altered velocity.
*
* @param Velocity Any component of velocity (e.g. 20).
* @param Acceleration Rate at which the velocity is changing.
* @param Drag Really kind of a deceleration, this is how much the velocity changes if Acceleration is not set.
*
* @return The altered Velocity value.
*/
static public float computeVelocity(float Velocity, float Acceleration, float Drag)
{
return computeVelocity(Velocity, Acceleration, Drag, 10000);
}
/**
* A tween-like function that takes a starting velocity
* and some other factors and returns an altered velocity.
*
* @param Velocity Any component of velocity (e.g. 20).
* @param Acceleration Rate at which the velocity is changing.
*
* @return The altered Velocity value.
*/
static public float computeVelocity(float Velocity, float Acceleration)
{
return computeVelocity(Velocity, Acceleration, 0, 10000);
}
/**
* A tween-like function that takes a starting velocity
* and some other factors and returns an altered velocity.
*
* @param Velocity Any component of velocity (e.g. 20).
*
* @return The altered Velocity value.
*/
static public float computeVelocity(float Velocity)
{
return computeVelocity(Velocity, 0, 0, 10000);
}
//*** NOTE: THESE LAST THREE FUNCTIONS REQUIRE FLXPOINT ***//
/**
* Rotates a point in 2D space around another point by the given angle.
*
* @param X The X coordinate of the point you want to rotate.
* @param Y The Y coordinate of the point you want to rotate.
* @param PivotX The X coordinate of the point you want to rotate around.
* @param PivotY The Y coordinate of the point you want to rotate around.
* @param Angle Rotate the point by this many degrees.
* @param Point Optional <code>FlxPoint</code> to store the results in.
*
* @return A <code>FlxPoint</code> containing the coordinates of the rotated point.
*/
public static FlxPoint rotatePoint(float X, float Y, float PivotX, float PivotY, float Angle, FlxPoint Point)
{
float sin = 0;
float cos = 0;
float radians = Angle * -0.017453293f;
while(radians < -3.14159265f)
radians += 6.28318531f;
while(radians > 3.14159265f)
radians = radians - 6.28318531f;
if(radians < 0)
{
sin = 1.27323954f * radians + .405284735f * radians * radians;
if(sin < 0)
sin = .225f * (sin *-sin - sin) + sin;
else
sin = .225f * (sin * sin - sin) + sin;
}
else
{
sin = 1.27323954f * radians - 0.405284735f * radians * radians;
if(sin < 0)
sin = .225f * (sin *-sin - sin) + sin;
else
sin = .225f * (sin * sin - sin) + sin;
}
radians += 1.57079632f;
if(radians > 3.14159265f)
radians = radians - 6.28318531f;
if(radians < 0)
{
cos = 1.27323954f * radians + 0.405284735f * radians * radians;
if(cos < 0)
cos = .225f * (cos *-cos - cos) + cos;
else
cos = .225f * (cos * cos - cos) + cos;
}
else
{
cos = 1.27323954f * radians - 0.405284735f * radians * radians;
if(cos < 0)
cos = .225f * (cos *-cos - cos) + cos;
else
cos = .225f * (cos * cos - cos) + cos;
}
float dx = X-PivotX;
float dy = PivotY+Y; //Y axis is inverted in flash, normally this would be a subtract operation
if(Point == null)
Point = new FlxPoint();
Point.x = PivotX + cos*dx - sin*dy;
Point.y = PivotY - sin*dx - cos*dy;
return Point;
}
/**
* Rotates a point in 2D space around another point by the given angle.
*
* @param X The X coordinate of the point you want to rotate.
* @param Y The Y coordinate of the point you want to rotate.
* @param PivotX The X coordinate of the point you want to rotate around.
* @param PivotY The Y coordinate of the point you want to rotate around.
* @param Angle Rotate the point by this many degrees.
*
* @return A <code>FlxPoint</code> containing the coordinates of the rotated point.
*/
public static FlxPoint rotatePoint(float X, float Y, float PivotX, float PivotY, float Angle)
{
return rotatePoint(X, Y, PivotX, PivotY, Angle, null);
}
/**
* Calculates the angle between two points. 0 degrees points straight up.
*
* @param Point1 The X coordinate of the point.
* @param Point2 The Y coordinate of the point.
*
* @return The angle in degrees, between -180 and 180.
*/
static public float getAngle(FlxPoint Point1, FlxPoint Point2)
{
float x = Point2.x - Point1.x;
float y = Point2.y - Point1.y;
if((x == 0) && (y == 0))
return 0;
float c1 = 3.14159265f * 0.25f;
float c2 = 3 * c1;
float ay = (y < 0)?-y:y;
float angle = 0;
if(x >= 0)
angle = c1 - c1 * ((x - ay) / (x + ay));
else
angle = c2 - c1 * ((x + ay) / (ay - x));
angle = ((y < 0) ? -angle : angle) * 57.2957796f;
if(angle > 90)
angle = angle - 270;
else
angle += 90;
return angle;
};
/**
* Calculate the distance between two points.
*
* @param Point1 A <code>FlxPoint</code> object referring to the first location.
* @param Point2 A <code>FlxPoint</code> object referring to the second location.
*
* @return The distance between the two points as a floating point <code>Number</code> object.
*/
static public float getDistance(FlxPoint Point1,FlxPoint Point2)
{
float dx = Point1.x - Point2.x;
float dy = Point1.y - Point2.y;
return (float)Math.sqrt(dx * dx + dy * dy);
}
/**
* Returns the value of the first argument raised to the power of the second argument.
* NOTE: before you use this code you have to test it if the approximation is good enough for you!
*
* @param Base The base.
* @param Exponent The exponent.
*
* @return The result.
*/
public static float pow(double Base, double Exponent)
{
final int tmp = (int) (Double.doubleToLongBits(Base) >> 32);
final int tmp2 = (int) (Exponent * (tmp - 1072632447) + 1072632447);
return (float) Double.longBitsToDouble(((long) tmp2) << 32);
}
}