star-3d

commit 96a07e217c782b471045533813456c046d02dd93
parent 4a2e1c1025a288048e63cca45400b596c0955b60
Author: Christophe Coustet <christophe.coustet@meso-star.com>
Date:   Tue, 19 Jan 2021 15:12:08 +0100

Add a test on closest_point hit normals

Diffstat:
M
src/test_s3d_closest_point.c
 | 
6
++++--

1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/src/test_s3d_closest_point.c b/src/test_s3d_closest_point.c
@@ -957,7 +957,7 @@ test_single_triangle(struct s3d_device* dev)
     const float amplitude = exp2f((float)a);
     const float eps = 5e-6f * amplitude;
     FOR_EACH(i, 0, 1000) {
-      float A[3], B[3], C[3], AB[3], AC[3], BC[3], N[3];
+      float A[3], B[3], C[3], AB[3], AC[3], BC[3], N[3], hit_N[3];
       int j, n;
 
       /* Randomly generate a triangle ABC */
@@ -973,7 +973,7 @@ test_single_triangle(struct s3d_device* dev)
       f3_sub(AB, B, A);
       f3_sub(AC, C, A);
       f3_sub(BC, C, B);
-      f3_cross(N, AB, AC);
+      f3_cross(N, AC, AB); /* Left hand convention */
       f3_normalize(N, N);
 
       f3_set(vertices + 0, A);
@@ -1070,6 +1070,8 @@ test_single_triangle(struct s3d_device* dev)
         /* Intersection-point's position is less accurate than hit distance */
         d = f3_len(f3_sub(tmp, closest, attr.value));
         CHK(d <= 10 * eps);
+        f3_normalize(hit_N, hit.normal);
+        CHK(f3_eq_eps(N, hit_N, FLT_EPSILON));
       }
 
       CHK(s3d_shape_ref_put(msh) == RES_OK);