var v = new pc.Vec2(1, 2);

Vec2([x], [y]) 

Creates a new Vec2 object.

var v = new pc.Vec2(1, 2);

Parameters

x	number, number[]	The x value. If x is an array of length 2, the array will be used to populate all components.
y	number	The y value.

numberx 

The first element of the vector.

var vec = new pc.Vec2(10, 20);

// Get x
var x = vec.x;

// Set x
vec.x = 0;

numbery 

The second element of the vector.

var vec = new pc.Vec2(10, 20);

// Get y
var y = vec.y;

// Set y
vec.y = 0;

add(rhs) 

Adds a 2-dimensional vector to another in place.

var a = new pc.Vec2(10, 10);
var b = new pc.Vec2(20, 20);

a.add(b);

// Should output [30, 30]
console.log("The result of the addition is: " + a.toString());

Parameters

rhs

Vec2

The vector to add to the specified vector.

Returns

Vec2

Self for chaining.

add2(lhs, rhs) 

Adds two 2-dimensional vectors together and returns the result.

var a = new pc.Vec2(10, 10);
var b = new pc.Vec2(20, 20);
var r = new pc.Vec2();

r.add2(a, b);
// Should output [30, 30]

console.log("The result of the addition is: " + r.toString());

Parameters

lhs	Vec2	The first vector operand for the addition.
rhs	Vec2	The second vector operand for the addition.

Returns

Vec2

Self for chaining.

clone() 

Returns an identical copy of the specified 2-dimensional vector.

var v = new pc.Vec2(10, 20);
var vclone = v.clone();
console.log("The result of the cloning is: " + vclone.toString());

Returns

Vec2

A 2-dimensional vector containing the result of the cloning.

copy(rhs) 

Copied the contents of a source 2-dimensional vector to a destination 2-dimensional vector.

var src = new pc.Vec2(10, 20);
var dst = new pc.Vec2();

dst.copy(src);

console.log("The two vectors are " + (dst.equals(src) ? "equal" : "different"));

Parameters

rhs

Vec2

A vector to copy to the specified vector.

Returns

Vec2

Self for chaining.

cross(rhs) 

Returns the result of a cross product operation performed on the two specified 2-dimensional vectors.

var right = new pc.Vec2(1, 0);
var up = new pc.Vec2(0, 1);
var crossProduct = right.cross(up);

// Should print 1
console.log("The result of the cross product is: " + crossProduct);

Parameters

rhs

Vec2

The second 2-dimensional vector operand of the cross product.

Returns

number

The cross product of the two vectors.

distance(rhs) 

Returns the distance between the two specified 2-dimensional vectors.

var v1 = new pc.Vec2(5, 10);
var v2 = new pc.Vec2(10, 20);
var d = v1.distance(v2);
console.log("The between v1 and v2 is: " + d);

Parameters

rhs

Vec2

The second 2-dimensional vector to test.

Returns

number

The distance between the two vectors.

dot(rhs) 

Returns the result of a dot product operation performed on the two specified 2-dimensional vectors.

var v1 = new pc.Vec2(5, 10);
var v2 = new pc.Vec2(10, 20);
var v1dotv2 = v1.dot(v2);
console.log("The result of the dot product is: " + v1dotv2);

Parameters

rhs

Vec2

The second 2-dimensional vector operand of the dot product.

Returns

number

The result of the dot product operation.

equals(rhs) 

Reports whether two vectors are equal.

var a = new pc.Vec2(1, 2);
var b = new pc.Vec2(4, 5);
console.log("The two vectors are " + (a.equals(b) ? "equal" : "different"));

Parameters

rhs

Vec2

The vector to compare to the specified vector.

Returns

boolean

True if the vectors are equal and false otherwise.

length() 

Returns the magnitude of the specified 2-dimensional vector.

var vec = new pc.Vec2(3, 4);
var len = vec.length();
// Should output 5
console.log("The length of the vector is: " + len);

Returns

number

The magnitude of the specified 2-dimensional vector.

lengthSq() 

Returns the magnitude squared of the specified 2-dimensional vector.

var vec = new pc.Vec2(3, 4);
var len = vec.lengthSq();
// Should output 25
console.log("The length squared of the vector is: " + len);

Returns

number

The magnitude of the specified 2-dimensional vector.

lerp(lhs, rhs, alpha) 

Returns the result of a linear interpolation between two specified 2-dimensional vectors.

var a = new pc.Vec2(0, 0);
var b = new pc.Vec2(10, 10);
var r = new pc.Vec2();

r.lerp(a, b, 0);   // r is equal to a
r.lerp(a, b, 0.5); // r is 5, 5
r.lerp(a, b, 1);   // r is equal to b

Parameters

lhs	Vec2	The 2-dimensional to interpolate from.
rhs	Vec2	The 2-dimensional to interpolate to.
alpha	number	The value controlling the point of interpolation. Between 0 and 1, the linear interpolant will occur on a straight line between lhs and rhs. Outside of this range, the linear interpolant will occur on a ray extrapolated from this line.

Returns

Vec2

Self for chaining.

mul(rhs) 

Multiplies a 2-dimensional vector to another in place.

var a = new pc.Vec2(2, 3);
var b = new pc.Vec2(4, 5);

a.mul(b);

// Should output 8, 15
console.log("The result of the multiplication is: " + a.toString());

Parameters

rhs

Vec2

The 2-dimensional vector used as the second multiplicand of the operation.

Returns

Vec2

Self for chaining.

mul2(lhs, rhs) 

Returns the result of multiplying the specified 2-dimensional vectors together.

var a = new pc.Vec2(2, 3);
var b = new pc.Vec2(4, 5);
var r = new pc.Vec2();

r.mul2(a, b);

// Should output 8, 15
console.log("The result of the multiplication is: " + r.toString());

Parameters

lhs	Vec2	The 2-dimensional vector used as the first multiplicand of the operation.
rhs	Vec2	The 2-dimensional vector used as the second multiplicand of the operation.

Returns

Vec2

Self for chaining.

normalize() 

Returns this 2-dimensional vector converted to a unit vector in place. If the vector has a length of zero, the vector's elements will be set to zero.

var v = new pc.Vec2(25, 0);

v.normalize();

// Should output 1, 0
console.log("The result of the vector normalization is: " + v.toString());

Returns

Vec2

Self for chaining.

scale(scalar) 

Scales each component of the specified 2-dimensional vector by the supplied scalar value.

var v = new pc.Vec2(2, 4);

// Multiply by 2
v.scale(2);

// Negate
v.scale(-1);

// Divide by 2
v.scale(0.5);

Parameters

scalar

number

The value by which each vector component is multiplied.

Returns

Vec2

Self for chaining.

set(x, y) 

Sets the specified 2-dimensional vector to the supplied numerical values.

var v = new pc.Vec2();
v.set(5, 10);

// Should output 5, 10
console.log("The result of the vector set is: " + v.toString());

Parameters

x	number	The value to set on the first component of the vector.
y	number	The value to set on the second component of the vector.

Returns

Vec2

Self for chaining.

sub(rhs) 

Subtracts a 2-dimensional vector from another in place.

var a = new pc.Vec2(10, 10);
var b = new pc.Vec2(20, 20);

a.sub(b);

// Should output [-10, -10]
console.log("The result of the subtraction is: " + a.toString());

Parameters

rhs

Vec2

The vector to add to the specified vector.

Returns

Vec2

Self for chaining.

sub2(lhs, rhs) 

Subtracts two 2-dimensional vectors from one another and returns the result.

var a = new pc.Vec2(10, 10);
var b = new pc.Vec2(20, 20);
var r = new pc.Vec2();

r.sub2(a, b);

// Should output [-10, -10]
console.log("The result of the subtraction is: " + r.toString());

Parameters

lhs	Vec2	The first vector operand for the addition.
rhs	Vec2	The second vector operand for the addition.

Returns

Vec2

Self for chaining.

toString() 

Converts the vector to string form.

var v = new pc.Vec2(20, 10);
// Should output '[20, 10]'
console.log(v.toString());

Returns

string

The vector in string form.