A structure containing type-specific information for certain effects.
- macOS 10.2+
Used with the SINE, SQUARE, TRIANGLE, SAWTOOTHUP, and SAWTOOTHDOWN effects.
A pointer to a single FFPERIODIC structure for an effect is passed in the lpvTypeSpecificParams member of the FFEFFECT structure. A Force Feedback plugIn cannot provide support for all values in the dwPhase member. In this case, the value is rounded off to the nearest supported value.