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java.lang.Objectorg.jbox2d.common.Vec2
public class Vec2
A 2-dimensional vector class. Used heavily in JBox2d.
Field Summary | |
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static int |
creationCount
Running count of Vec2 creations. |
static boolean |
watchCreations
Should we count Vec2 creations? |
float |
x
|
float |
y
|
Constructor Summary | |
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Vec2()
|
|
Vec2(float x,
float y)
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Method Summary | |
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Vec2 |
abs()
Return a new vector that has positive components. |
static Vec2 |
abs(Vec2 a)
|
Vec2 |
add(Vec2 v)
Return the sum of this vector and another; does not alter either one. |
Vec2 |
addLocal(Vec2 v)
Add another vector to this one and return result - alters this vector. |
Vec2 |
clone()
|
static Vec2 |
cross(float s,
Vec2 a)
|
static Vec2 |
cross(Vec2 a,
float s)
|
static float |
cross(Vec2 a,
Vec2 b)
|
static float |
dot(Vec2 a,
Vec2 b)
|
boolean |
isValid()
True if the vector represents a pair of valid, non-infinite floating point numbers. |
float |
length()
Return the length of this vector. |
float |
lengthSquared()
Return the squared length of this vector. |
static Vec2 |
max(Vec2 a,
Vec2 b)
|
static Vec2 |
min(Vec2 a,
Vec2 b)
|
Vec2 |
mul(float a)
Return this vector multiplied by a scalar; does not alter this vector. |
Vec2 |
mulLocal(float a)
Multiply this vector by a number and return result - alters this vector. |
Vec2 |
negate()
Return the negation of this vector; does not alter this vector. |
Vec2 |
negateLocal()
Flip the vector and return it - alters this vector. |
float |
normalize()
Normalize this vector and return the length before normalization. |
void |
set(float x,
float y)
Set the vector component-wise. |
void |
set(Vec2 v)
Set this vector to another vector. |
void |
setZero()
Zero out this vector. |
Vec2 |
sub(Vec2 v)
Return the difference of this vector and another; does not alter either one. |
Vec2 |
subLocal(Vec2 v)
Subtract another vector from this one and return result - alters this vector. |
java.lang.String |
toString()
|
Methods inherited from class java.lang.Object |
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equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Field Detail |
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public static final boolean watchCreations
public static int creationCount
public float x
public float y
Constructor Detail |
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public Vec2()
public Vec2(float x, float y)
Method Detail |
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public void setZero()
public void set(float x, float y)
public void set(Vec2 v)
public Vec2 add(Vec2 v)
public Vec2 sub(Vec2 v)
public Vec2 mul(float a)
public Vec2 negate()
public Vec2 negateLocal()
public Vec2 addLocal(Vec2 v)
public Vec2 subLocal(Vec2 v)
public Vec2 mulLocal(float a)
public float length()
public float lengthSquared()
public float normalize()
public boolean isValid()
public Vec2 abs()
public Vec2 clone()
clone
in class java.lang.Object
public java.lang.String toString()
toString
in class java.lang.Object
public static Vec2 abs(Vec2 a)
public static float dot(Vec2 a, Vec2 b)
public static float cross(Vec2 a, Vec2 b)
public static Vec2 cross(Vec2 a, float s)
public static Vec2 cross(float s, Vec2 a)
public static Vec2 min(Vec2 a, Vec2 b)
public static Vec2 max(Vec2 a, Vec2 b)
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