C++ (Cpp) Vector3d::Dot Examples

Example #1

File: Plane.cpp Project: MrCappuccino/Tracey

FPType Plane::GetIntersectionDisk(Ray ray, Vector3d normal_, Vector3d position)
{
	FPType denom = normal_.Dot(ray.GetDirection());
	FPType t = -1;
	if(std::abs(denom) > ray.tMin && t <= ray.tMax)
	{
		t = (position - ray.GetOrigin()).Dot(normal_) / denom;
	}
	return t;
}

Example #2

File: Enderman.cpp Project: Haxi52/cuberite

	virtual bool Item(cPlayer * a_Player) override
	{
		// Don't check players who are in creative gamemode
		if (a_Player->IsGameModeCreative())
		{
			return false;
		}
		
		Vector3d Direction = m_EndermanPos - a_Player->GetPosition();
		
		// Don't check players who are more then SightDistance (64) blocks away
		if (Direction.Length() > m_SightDistance)
		{
			return false;
		}
		
		// Don't check if the player has a pumpkin on his head
		if (a_Player->GetEquippedHelmet().m_ItemType == E_BLOCK_PUMPKIN)
		{
			return false;
		}

		
		Vector3d LookVector = a_Player->GetLookVector();
		double dot = Direction.Dot(LookVector);
		
		// 0.09 rad ~ 5 degrees
		// If the player's crosshair is within 5 degrees of the enderman, it counts as looking
		if (dot <= cos(0.09))
		{
			return false;
		}
		
		cTracer LineOfSight(a_Player->GetWorld());
		if (LineOfSight.Trace(m_EndermanPos, Direction, static_cast<int>(Direction.Length())))
		{
			// No direct line of sight
			return false;
		}

		m_Player = a_Player;
		return true;
	}