ncollide3d/query/nonlinear_time_of_impact/
nonlinear_time_of_impact_ball_ball.rs

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use na::RealField;

use crate::interpolation::RigidMotion;
use crate::math::Isometry;
use crate::query::{self, ClosestPoints, TOI};
use crate::shape::Ball;

/// Non-linear Time Of Impact of two balls under a rigid motion (translation + rotation).
#[inline]
pub fn nonlinear_time_of_impact_ball_ball<N: RealField + Copy>(
    motion1: &(impl RigidMotion<N> + ?Sized),
    b1: &Ball<N>,
    motion2: &(impl RigidMotion<N> + ?Sized),
    b2: &Ball<N>,
    max_toi: N,
    target_distance: N,
) -> Option<TOI<N>> {
    fn closest_points<N: RealField + Copy>(
        m1: &Isometry<N>,
        g1: &Ball<N>,
        m2: &Isometry<N>,
        g2: &Ball<N>,
        prediction: N,
    ) -> ClosestPoints<N> {
        query::closest_points_ball_ball(
            &m1.translation.vector.into(),
            g1,
            &m2.translation.vector.into(),
            g2,
            prediction,
        )
    }

    query::nonlinear_time_of_impact_support_map_support_map_with_closest_points_function(
        motion1,
        b1,
        motion2,
        b2,
        max_toi,
        target_distance,
        closest_points,
    )
}