Implements "noncar" physics

[dethrace-labs]

NonCars are what the game calls pieces of the track that you can interact with. For example, streetlights can be bent and snapped off, benches can be pushed around etc.

• Implements all the physics functions required for this to work
• Uncomments RemoveDoubleSided
• Fixes auto-generated br_material and br_model structs to align better with real usage
• Culling globally disabled in gl_renderer to fix issues with streetlights not rendering from all angles. This matches what we know of the 3dfx version, for example.

noncarphysics.short.mp4

[madebr]

Super!

[madebr]

These functions/macro's are not documented in the brender documentation, from foone.
I would move these to a dethrace header and loose the Br prefix.
This would also keep dethrace working, with (the soon-to-be-open-sourced 🤞) real BRender.

I was not 100% confident though about the naming: vector's already have dot + cross multiplication, and a divide simply does not exist.

But some googling shows me that other engines have added is nonetheless, it's a convenience to have.

unity3 has:
I googled a bit and found this for unity: https://docs.unity3d.com/ScriptReference/Vector3.Scale.html
C# has:
https://docs.microsoft.com/en-us/dotnet/api/system.numerics.vector3.multiply?view=net-6.0
https://docs.microsoft.com/en-us/dotnet/api/system.numerics.vector3.divide?view=net-6.0
UnrealScript allowed vect(1,2,3) * vect(2,3,4) = vect(2,6,12):
https://wiki.beyondunreal.com/Legacy:UnrealScript_Vector_Maths

[dethrace-labs]

yes, good call. I was being lazy :)

[madebr]

To be clear, I"m fine with adding these.
I want to be lazy too :D

[dethrace-labs]

no, thank you for pointing it out! I'm making the change as you suggest!

[madebr]

Perhaps we need to do something as following?

typedef struct {
    int flags;
} dethrace_material_props;

#define DR_MATUFLAGS_DOUBLE_SIDED 0x01

A nuisance with this approach is the need for allocation, but should be do-able when using BrResAllocate (which will automatically de-allocate when the parent is de-allocated).

[dethrace-labs]

your idea is better in all ways :)

However, since (void*)12345 is what the OG code does, I'd leave refactoring to be cleaner to a different repo/branch

[madebr]

Oh, then it's totally fine. I thought this was custom code to fix the lanterns.

[dethrace-labs]

ah cool. Yeah, I'm holding firm to any code in src/DETHRACE that doesn't come from OG has to be wrapped in the FIX_BUGS macro