Merge pull request #79 from dimforge/split_geom

Move most of the geometric code to another crate.

1 files changed, 0 insertions, 70 deletions

diff --git a/src/geometry/z_order.rs b/src/geometry/z_order.rs
deleted file mode 100644
index 6693547..0000000
--- a/src/geometry/z_order.rs
+++ /dev/null
@@ -1,70 +0,0 @@
-use num_traits::float::FloatCore;
-use std::cmp::Ordering;
-
-#[allow(dead_code)] // We don't use this currently, but migth in the future.
-pub fn z_cmp_ints(lhs: &[usize], rhs: &[usize]) -> Ordering {
-    assert_eq!(
-        lhs.len(),
-        rhs.len(),
-        "Cannot compare array with different lengths."
-    );
-
-    let mut msd = 0;
-
-    for dim in 1..rhs.len() {
-        if less_msb(lhs[msd] ^ rhs[msd], lhs[dim] ^ rhs[dim]) {
-            msd = dim;
-        }
-    }
-
-    lhs[msd].cmp(&rhs[msd])
-}
-
-fn less_msb(x: usize, y: usize) -> bool {
-    x < y && x < (x ^ y)
-}
-
-// Fast construction of k-Nearest Neighbor Graphs for Point Clouds
-// Michael Connor, Piyush Kumar
-// Algorithm 1
-//
-// http://compgeom.com/~piyush/papers/tvcg_stann.pdf
-pub fn z_cmp_floats(p1: &[f32], p2: &[f32]) -> Option<Ordering> {
-    assert_eq!(
-        p1.len(),
-        p2.len(),
-        "Cannot compare array with different lengths."
-    );
-    let mut x = 0;
-    let mut dim = 0;
-
-    for j in 0..p1.len() {
-        let y = xor_msb_float(p1[j], p2[j]);
-        if x < y {
-            x = y;
-            dim = j;
-        }
-    }
-
-    p1[dim].partial_cmp(&p2[dim])
-}
-
-fn xor_msb_float(fa: f32, fb: f32) -> i16 {
-    let (mantissa1, exponent1, _sign1) = fa.integer_decode();
-    let (mantissa2, exponent2, _sign2) = fb.integer_decode();
-    let x = exponent1; // To keep the same notation as the paper.
-    let y = exponent2; // To keep the same notation as the paper.
-
-    if x == y {
-        let z = msdb(mantissa1, mantissa2);
-        x - z
-    } else if y < x {
-        x
-    } else {
-        y
-    }
-}
-
-fn msdb(x: u64, y: u64) -> i16 {
-    64i16 - (x ^ y).leading_zeros() as i16
-}