Function OH_ArkUI_Curve_CreateCustomCurve

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.

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.