Collision category bits

[Omroth]

Here's the docs:

enum Category {
CATEGORY1 = 0x0001,
CATEGORY2 = 0x0002,
CATEGORY3 = 0x0004
};

When I start extending this, such as:

enum Category {
CATEGORY1 = 0x0001,
CATEGORY2 = 0x0002,
CATEGORY3 = 0x0004
CATEGORY4 = 0x0008
CATEGORY5 = 0x0016
CATEGORY6 = 0x0032
CATEGORY7 = 0x0064
};

I find that say CATEGORY4 | CATEGORY7 also tests true with CATEGORY2 - what am I doing wrong?

[Deleted user]

found it,

[DanielChappuis]

found it,

What did you find exactly? Did you find an issue in your code or in the library?

[Deleted user]

Well, I think it was an issue with trying to use higher 0x00 numbers. Enum (I believe) defaults to an Unsigned 32 bit number, and I see that RP3D expects Unsigned short, although I thought that the cast would work. Anyway, I just declare my collision categories like this and it worked:

static const U16 TEAM_0_ACTOR_COLLISION_CATEGORY = 256;
static const U16 TEAM_1_ACTOR_COLLISION_CATEGORY = 512;
static const U16 TEAM_2_ACTOR_COLLISION_CATEGORY = 1024;
static const U16 TEAM_3_ACTOR_COLLISION_CATEGORY = 2048;
static const U16 TEAM_4_ACTOR_COLLISION_CATEGORY = 4096;
static const U16 TEAM_5_ACTOR_COLLISION_CATEGORY = 8192;

[MintPaw]

I'm guessing this feature isn't well tested because it's not often used. But this collision filtering seems totally broken in my application. I can't prevent collisions between spheres/boxes and triangle meshes, even if I set collider->setCollideWithMaskBits(0); every frame.

It does work if you set the bits to 0 on the first frame, but if you wait and set it later, it doesn't work. Is this the intended behavior?