Method isWithinVision

game/state/battle/battleunit.cpp:307–355

}

bool BattleUnit::isWithinVision(Vec3<int> pos)
{
	auto diff = pos - (Vec3<int>)position;
	// Distance quick check
	if (diff.x * diff.x + diff.y * diff.y > VIEW_DISTANCE * VIEW_DISTANCE)
	{
		return false;
	}
	// Static units have 360 vision
	if (agent->type->bodyType->allowed_movement_states.size() == 1)
	{
		return true;
	}
	// Facing: Any, check if we're at the correct side
	if (diff.x * facing.x < 0 || diff.y * facing.y < 0)
	{
		return false;
	}
	// Facing: Diagonally
	if (facing.x != 0 && facing.y != 0)
	{
		// Nothing to be done, we already checked above
	}
	// Facing: Along one of axes
	else
	{
		// Facing: Along X
		if (facing.x != 0)
		{
			// Already checked if we're at the correct side above
			// Now we only need to check if we're inside the cone
			if (std::abs(diff.x) < std::abs(diff.y))
			{
				return false;
			}
		}
		// Facing: Along Y
		else
		{
			// Already checked if we're at the correct side above
			// Now we only need to check if we're inside the cone
			if (std::abs(diff.x) > std::abs(diff.y))
			{
				return false;
			}
		}
	}
	return true;
}

void BattleUnit::calculateVisionToTerrain(GameState &state)
{