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DICUSTOMFORCE Structure

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Contains type-specific information for effects that are marked as DIEFT_CUSTOMFORCE.

The structure describes a custom or user-defined force.

A pointer to a DICUSTOMFORCE structure for an effect is passed in the lpvTypeSpecificParams member of the DIEFFECT structure.

Syntax

typedef struct DICUSTOMFORCE {
    DWORD cChannels;
    DWORD dwSamplePeriod;
    DWORD cSamples;
    LPLONG rglForceData;
} DICUSTOMFORCE, *LPDICUSTOMFORCE;

Members

  • cChannels
    Number of channels (axes) affected by this force.

    The first channel is applied to the first axis associated with the effect, the second to the second, and so on. If there are fewer channels than axes, nothing is associated with the extra axes.

    If there is only a single channel, the effect is rotated in the direction specified by the rglDirection member of the DIEFFECT structure. If there is more than one channel, rotation is not allowed.

    Not all devices support rotation of custom effects.

  • dwSamplePeriod
    Sample period, in microseconds.

  • cSamples
    Total number of samples in the rglForceData. It must be an integral multiple of the cChannels.

  • rglForceData
    Pointer to an array of force values representing the custom force. If multiple channels are provided, the values are interleaved. For example, if cChannels is 3, the first element of the array belongs to the first channel, the second to the second, and the third to the third.