OH_ArkUI_Curve_CreateCustomCurve

arkui_sys::native_animate

Function OH_ArkUI_Curve_CreateCustomCurve 

Source 
pub unsafe extern "C" fn OH_ArkUI_Curve_CreateCustomCurve(
    userData: *mut c_void,
    interpolate: Option<unsafe extern "C" fn(fraction: f32, userdata: *mut c_void) -> f32>,
) -> ArkUI_CurveHandle
Available on crate feature api-12 only.
Expand description

Creates a custom curve.

§Arguments

  • userData - Indicates the custom data.

  • interpolate - Indicates the custom interpolation callback. fraction indicates the input x value for interpolation when the animation starts; value range: [0,1]. The return value is the y value of the curve; value range: [0,1]. If fraction is 0, the return value 0 corresponds to the animation start point; any other return value means that the animation jumps at the start point. If fraction is 1, the return value 1 corresponds to the animation end point; any other return value means that the end value of the animation is not the value of the state variable, which will result in an effect of transition from that end value to the value of the state variable.

§Returns

  • Returns the pointer to the interpolation object of the curve. Returns NULL if a parameter error occurs.

Available since API-level: 12