void WarpZone_StartFrame();
float WarpZone_Projectile_Touch();

// THESE must be defined by calling QC code:
void WarpZone_PostTeleportPlayer_Callback(entity pl);
float WarpZone_Projectile_Touch_ImpactFilter_Callback();

// server must also define a float called ENT_CLIENT_WARPZONE for the initial byte of WarpZone entities
const float ENT_CLIENT_WARPZONE;
const float ENT_CLIENT_WARPZONE_CAMERA;