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#[cfg(feature = "dim2")]
use crate::math::Vector;
use crate::math::{Isometry, Real};
use crate::query::{sat, ContactManifold};
use crate::shape::PolygonalFeature;
use crate::shape::{Cuboid, Shape, Triangle};
pub fn contact_manifold_cuboid_triangle_shapes<ManifoldData, ContactData>(
pos12: &Isometry<Real>,
shape1: &dyn Shape,
shape2: &dyn Shape,
prediction: Real,
manifold: &mut ContactManifold<ManifoldData, ContactData>,
) where
ContactData: Default + Copy,
{
if let (Some(cuboid1), Some(triangle2)) = (shape1.as_cuboid(), shape2.as_triangle()) {
contact_manifold_cuboid_triangle(
pos12,
&pos12.inverse(),
cuboid1,
triangle2,
prediction,
manifold,
false,
);
} else if let (Some(triangle1), Some(cuboid2)) = (shape1.as_triangle(), shape2.as_cuboid()) {
contact_manifold_cuboid_triangle(
&pos12.inverse(),
pos12,
cuboid2,
triangle1,
prediction,
manifold,
true,
);
}
}
pub fn contact_manifold_cuboid_triangle<'a, ManifoldData, ContactData>(
pos12: &Isometry<Real>,
pos21: &Isometry<Real>,
cuboid1: &'a Cuboid,
triangle2: &'a Triangle,
prediction: Real,
manifold: &mut ContactManifold<ManifoldData, ContactData>,
flipped: bool,
) where
ContactData: Default + Copy,
{
if (!flipped && manifold.try_update_contacts(&pos12))
|| (flipped && manifold.try_update_contacts(&pos21))
{
return;
}
let sep1 =
sat::cuboid_support_map_find_local_separating_normal_oneway(cuboid1, triangle2, &pos12);
if sep1.0 > prediction {
manifold.clear();
return;
}
let sep2 = sat::triangle_cuboid_find_local_separating_normal_oneway(triangle2, cuboid1, &pos21);
if sep2.0 > prediction {
manifold.clear();
return;
}
#[cfg(feature = "dim2")]
let sep3 = (-Real::MAX, Vector::x());
#[cfg(feature = "dim3")]
let sep3 = sat::cuboid_triangle_find_local_separating_edge_twoway(cuboid1, triangle2, &pos12);
if sep3.0 > prediction {
manifold.clear();
return;
}
let mut best_sep = sep1;
if sep2.0 > sep1.0 && sep2.0 > sep3.0 {
best_sep = (sep2.0, pos12 * -sep2.1);
} else if sep3.0 > sep1.0 {
best_sep = sep3;
}
let feature1;
let feature2;
let normal2 = pos21 * -best_sep.1;
#[cfg(feature = "dim2")]
{
feature1 = cuboid1.support_face(best_sep.1);
feature2 = triangle2.support_face(normal2);
}
#[cfg(feature = "dim3")]
{
feature1 = cuboid1.support_face(best_sep.1);
feature2 = PolygonalFeature::from(*triangle2);
}
let old_manifold_points = manifold.points.clone();
manifold.clear();
PolygonalFeature::contacts(
pos12,
pos21,
&best_sep.1,
&normal2,
&feature1,
&feature2,
prediction,
manifold,
flipped,
);
if flipped {
manifold.local_n1 = normal2;
manifold.local_n2 = best_sep.1;
} else {
manifold.local_n1 = best_sep.1;
manifold.local_n2 = normal2;
}
manifold.match_contacts(&old_manifold_points);
}