C++ (Cpp) TVector3::MakeUnit示例

示例#1

文件： b_func.cpp 项目： loismustdie555/GZDoom-GPL

//Emulates missile travel. Returns distance travelled.
fixed_t FCajunMaster::FakeFire (AActor *source, AActor *dest, ticcmd_t *cmd)
{
	AActor *th = Spawn ("CajunTrace", source->PosPlusZ(4*8*FRACUNIT), NO_REPLACE);
	
	th->target = source;		// where it came from

	float speed = (float)th->Speed;

	TVector3<double> velocity = source->Vec3To(dest);
	velocity.MakeUnit();
	th->velx = FLOAT2FIXED(velocity[0] * speed);
	th->vely = FLOAT2FIXED(velocity[1] * speed);
	th->velz = FLOAT2FIXED(velocity[2] * speed);

	fixed_t dist = 0;

	while (dist < SAFE_SELF_MISDIST)
	{
		dist += th->Speed;
		th->Move(th->velx, th->vely, th->velz);
		if (!CleanAhead (th, th->X(), th->Y(), cmd))
			break;
	}
	th->Destroy ();
	return dist;
}