typedef TQ3Status (*TQ3ChannelSetMethod) ( TQ3ControllerRef controllerRef, unsigned long channel, const void *data, unsigned long dataSize);controllerRef
A reference to a controller.channel
An index into the list of channels associated with the specified controller. This value is always greater than or equal to 0 and less than the channel count specified at the timeQ3Controller_New
was called.data
On entry, a pointer to a buffer that contains the desired value of the specified controller channel. If this field contains the valueNULL
, you should reset the specified channel to a default or inactive value.dataSize
On entry, the number of bytes of data in the specified buffer.
TQ3ChannelSetMethod
function should set the controller channel specified by the controllerRef
and channel
parameters to the value specified by the data
parameter. The dataSize
parameter specifies the number of bytes in the data buffer. QuickDraw3D allocates memory for the data buffer before it calls your function and deallocates the memory after your function has returned. The maximum number of bytes that the data buffer can hold is defined by a constant:
#define kQ3ControllerSetChannelMaxDataSize 256
Q3Controller_SetChannel
at any time to invoke a controller's channel-setting method.kQ3Success
if it is able to set the specified channel to the specified value and kQ3Failure
otherwise.Q3Controller_SetChannel
on page 18-20 for information on setting a controller's channels.
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