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Error with b2Mat22 in Box2d ?

BlitzMax Forums/Brucey's Modules/Error with b2Mat22 in Box2d ?

Armitage 1982(Posted 2008) [#1]
Hi Bruce

Is this possible that 
Local mat:b2Mat22 = New b2Mat22
mat.SetAngle(_angle)


bmx_b2mat22_setangle return an error caused by a null pointer ?
Without this 2x2 matrix you have to manually recreate the b2Mul() method ^^


Brucey(Posted 2008) [#2]
I've added some new Create methods :

Create(a11:Float = 0, a12:Float = 0, a21:Float = 0, a22:Float = 0)
CreateVec(c1:b2Vec2, c2:b2Vec2)
CreateAngle(angle:Float)

You would call like :

Local mat:b2Mat22 = new b2Mat22.Create()

Would have like to use it on New(), but for most cases (of use) that would mean creating a new instance of b2Mat22 and throwing it away immediately, since we'd be using one created by box2d... ho hum :-)

It probably still wants some more methods added for exposure of the individual columns (set/get).


Armitage 1982(Posted 2008) [#3]
Nice and complete additions :)
I will try those asap !