Pass field parameter by reference

szellmann · Nov 1, 2024 · dce161c · dce161c
1 parent b250976
commit dce161c
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/DeviceCopyableObjects.h b/DeviceCopyableObjects.h
@@ -452,7 +452,7 @@ inline bool sampleField(const SpatialField &sf, vec3 P, float &value) {
 }
 
 VSNRAY_FUNC
-inline bool sampleGradient(SpatialField sf, vec3 P, float3 &value) {
+inline bool sampleGradient(const SpatialField &sf, vec3 P, float3 &value) {
   float x0=0, x1=0, y0=0, y1=0, z0=0, z1=0;
   bool b0 = sampleField(sf, P+float3{sf.baseDT, 0.f, 0.f}, x1);
   bool b1 = sampleField(sf, P-float3{sf.baseDT, 0.f, 0.f}, x0);