/// <summary>
/// Gets integer information from the device.
/// </summary>
/// <param name="device">The opened device you want information from.</param>
/// <param name="informationType">Enum value for what kind of information is needed.</param>
/// <returns>Returns an integer corresponding to the informationType which is requested.</returns>
public int getIntInformation(Device device, ohmd_int_value informationType)
{
if(!openedDevices.ContainsKey(device.Index))
{
throw new DeviceNotOpenedException(String.Format("Device with index {0} and name {1} is not yet openend. Please open first.", device.Index, device.Product));
}
IntPtr hmd = openedDevices[device.Index];
int output = 0;
ohmd_device_geti(hmd, informationType, out output);
return output;
}
/// <summary>
/// Gets float information from a device.
/// </summary>
/// <param name="device">The opened device you want information from.</param>
/// <param name="arrayLength">Length of the array information you want.</param>
/// <param name="informationType">Enum value for what kind of information is needed.</param>
/// <returns>Returns an array of floats where the length is defined by arrayLength which is requested.</returns>
public float[] getFloatInformation(Device device, int arrayLength, ohmd_float_value informationType)
{
if (!openedDevices.ContainsKey(device.Index))
{
throw new DeviceNotOpenedException(String.Format("Device with index {0} and name {1} is not yet openend. Please open first.", device.Index, device.Product));
}
IntPtr hmd = openedDevices[device.Index];
float[] result = new float[arrayLength];
//Allocate the result memory, otherwise memory gets corrupted on read / write.
var gch = GCHandle.Alloc(result, GCHandleType.Pinned);
IntPtr f = gch.AddrOfPinnedObject();
//Get the actual value.
ohmd_device_getf(hmd, informationType, f);
//Copy the returned IntPtr to the result array.
Marshal.Copy(f, result, 0, arrayLength);
//Free the memory.
gch.Free();
return result;
}
/// <summary>
/// Opens a device for use by the OpenHMD driver and the application.
/// </summary>
/// <param name="device">The device you want to open.</param>
public void openDevice(Device device)
{
if (openHMDContext == IntPtr.Zero)
openContext();
if(openedDevices.ContainsKey(device.Index))
{
throw new OpenHMDDeviceAlreadyOpened(String.Format("The device with id: {0} has already been opened before and can be used.", device.Index));
}
IntPtr hmd = ohmd_list_open_device(openHMDContext, 0);
if (hmd == null)
{
Console.WriteLine(String.Format("failed to open device: {0}", ohmd_ctx_get_error(openHMDContext)));
return;
}
openedDevices.Add(device.Index, hmd);
}