Whip's Speed Based Lights v1

// Whip's Speed Based Lights v1 - 12/12/17

const string lightGroupName = "Thruster Lights"; //change this to whatever
const double maxSpeed = 100;
const float maxLightRadius = 160f;
const float maxLightIntensity = 5f;

// No touchey
List<IMyLightingBlock> lightList;
const double oneOverMaxSpeed = 1.0 / maxSpeed;

Program()
{
    Runtime.UpdateFrequency = UpdateFrequency.Update10;
    lightList = new List<IMyLightingBlock>();
}

void Main(string argument, UpdateType updateType)
{
    if ((updateType & UpdateType.Update10) == 0)
        return;

    Echo("WMI Speed Lights Online");
    var lightGroup = GridTerminalSystem.GetBlockGroupWithName(lightGroupName);
    if (lightGroup == null)
    {
        Echo($"> Error: No group named '{lightGroupName}' was found");
        return;
    }

    lightGroup.GetBlocksOfType(lightList);
    if (lightList.Count == 0)
    {
        Echo($"> Error: No lights found in light group");
        return;
    }

    var controller = GetFirstBlockOfType<IMyShipController>();
    if (controller == null)
    {
        Echo("> Error: No ship controller found");
        return;
    }

    var velocity = controller.GetShipVelocities().LinearVelocity;

    foreach(var block in lightList)
    {
        var lightDirection = block.WorldMatrix.Backward; //backward because we want the direction the light would "thrust" if it were a thruster
        var forwardVelocity = velocity.Dot(lightDirection);
        if (forwardVelocity < 1)
        {
            block.Enabled = false;
            continue;
        }
        else
            block.Enabled = true;

        var forwardVelocityProportion = forwardVelocity * oneOverMaxSpeed; //scale to get a proportion
        block.Radius = maxLightRadius * (float)forwardVelocityProportion;
        block.Intensity = maxLightIntensity * (float)forwardVelocityProportion;
    }

}

T GetFirstBlockOfType<T>() where T : class, IMyTerminalBlock
{
    var blocks = new List<T>();
    GridTerminalSystem.GetBlocksOfType(blocks);

    return blocks.Count > 0 ? blocks[0] : null;
}