star-2d

commit 06c70c6a82b24504b8c347da0bb8730ef846ebb6
parent 401c5325c8c80e05e59d874dcbdf3dc1f4466f94
Author: Christophe Coustet <christophe.coustet@meso-star.com>
Date:   Tue,  5 Jan 2021 11:10:56 +0100

Improve closest point test

Diffstat:
M
src/test_s2d_closest_point.c
 | 
24
+++++++++++++++++-------

1 file changed, 17 insertions(+), 7 deletions(-)
diff --git a/src/test_s2d_closest_point.c b/src/test_s2d_closest_point.c
@@ -405,12 +405,13 @@ test_single_segment(struct s2d_device* dev)
   CHK(s2d_scene_ref_put(scn) == RES_OK);
   
   FOR_EACH(i, 0, 100) {
-    float A[2], B[2];
-    const float amplitude = 100;
+    float A[2], B[2], tmp[2];
+    const float amplitude = 10000;
+    const float eps = 1e-6f * amplitude;
     /* Randomly generate a segment AB on the X axis */
     A[0] = (rand_canonic() - 0.5f) * amplitude;
     do B[0] = (rand_canonic() - 0.5f) * amplitude;
-    while(fabsf(A[0] - B[0]) < 1e-5);
+    while(fabsf(A[0] - B[0]) < eps);
     A[1] = B[1] = 0;
 
     f2_set(vertices + 0, A);
@@ -443,16 +444,25 @@ test_single_segment(struct s2d_device* dev)
 
       /* Cross check the closest point query result */
       closest_point_segment(pos, A, B, closest_pos);
-      CHK(f2_eq_eps(closest_pos, attr.value, 1.e-4f));
+      CHK(f2_eq_eps(closest_pos, attr.value, eps));
       if(A[0] > pos[0] && B[0] > pos[0]) {
-        CHK(f2_eq_eps(closest_pos, (A[0] > B[0] ? B : A), 1.e-4f));
+        const float* X = (A[0] > B[0]) ? B : A;
+        const float d = f2_len(f2_sub(tmp, pos, X));
+        CHK(f2_eq_eps(closest_pos, X, eps));
+        CHK(eq_epsf(hit.distance, d, eps));
       }
       else if(A[0] < pos[0] && B[0] < pos[0]) {
-        CHK(f2_eq_eps(closest_pos, (A[0] < B[0] ? B : A), 1.e-4f));
+        const float* X = (A[0] < B[0]) ? B : A;
+        const float d = f2_len(f2_sub(tmp, pos, X));
+        CHK(f2_eq_eps(closest_pos, X, eps));
+        CHK(eq_epsf(hit.distance, d, eps));
       } else {
         float expected[2];
+        float d = f2_len(f2_sub(tmp, pos, expected));
         f2(expected, pos[0], 0);
-        CHK(f2_eq_eps(closest_pos, expected, 1.e-4f));
+        d = f2_len(f2_sub(tmp, pos, expected));
+        CHK(f2_eq_eps(closest_pos, expected, eps));
+        CHK(eq_epsf(hit.distance, d, eps));
       }
     }