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Diffstat (limited to 'intern/cycles/kernel/bvh/util.h')
| -rw-r--r-- | intern/cycles/kernel/bvh/util.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/intern/cycles/kernel/bvh/util.h b/intern/cycles/kernel/bvh/util.h index 385e904d20f..02e927decd4 100644 --- a/intern/cycles/kernel/bvh/util.h +++ b/intern/cycles/kernel/bvh/util.h @@ -5,6 +5,21 @@ CCL_NAMESPACE_BEGIN +ccl_device_inline bool intersection_ray_valid(ccl_private const Ray *ray) +{ + /* NOTE: Due to some vectorization code non-finite origin point might + * cause lots of false-positive intersections which will overflow traversal + * stack. + * This code is a quick way to perform early output, to avoid crashes in + * such cases. + * From production scenes so far it seems it's enough to test first element + * only. + * Scene intersection may also called with empty rays for conditional trace + * calls that evaluate to false, so filter those out. + */ + return isfinite_safe(ray->P.x) && isfinite_safe(ray->D.x) && len_squared(ray->D) != 0.0f; +} + /* Offset intersection distance by the smallest possible amount, to skip * intersections at this distance. This works in cases where the ray start * position is unchanged and only tmin is updated, since for self |