Function xEntApplyPhysics

src/SB/Core/x/xEnt.cpp:1183–1226

} // namespace

void xEntApplyPhysics(xEnt* ent, xScene* sc, F32 dt)
{
    xVec3 dposvel = { 0, 0, 0 };

    if (ent->pflags & 0x4 && sc->flags & 0x1)
    {
        ent->frame->vel.y += sc->gravity * dt;
    }

    if (ent->pflags & 0x10 && sc->flags & 0x2)
    {
        F32 tfric = -(sc->friction * dt - 1.0f);
        xVec3SMulBy(&ent->frame->vel, tfric);
    }

    if (ent->pflags & 0x8 && sc->flags & 0x4)
    {
        F32 tdrag = -(sc->drag * dt - 1.0f);
        xVec3SMulBy(&ent->frame->vel, tdrag);
    }

    xVec3Add(&dposvel, &ent->frame->vel, &ent->frame->oldvel);
    xVec3SMulBy(&dposvel, 0.5f * dt);

    if (dposvel.y < 0.0f)
    {
        F32 dposXZ = xsqrt(SQR(dposvel.x) + SQR(dposvel.z));
        F32 scaleXZ = (dposXZ > 0.00001f) ? ((0.63f * (30.0f * dt)) / dposXZ) : 0.0f;
        F32 scaleY = (0.63f * (30.0f * dt)) / (F32)iabs(dposvel.y);

        if (scaleXZ < 1.0f)
        {
            dposvel.x *= scaleXZ;
            dposvel.z *= scaleXZ;
        }

        if (scaleY < 1.0f)
        {
            dposvel.y *= scaleY;
        }
    }

    xEntAddToPos(ent, &dposvel);
}

void xEntCollide(xEnt* ent, xScene* sc, F32 dt)
{