Geometry Nodes: Add operation setting to attribute randomize node

This commit adds a drop-down to the attribute randomize node to support
a few operations on the values of existing attributes: "Replace/Create"
(the existing behavior), "Add", "Subtract", and "Multiply".
At this point, the operations are limited by what is simple to implement.
More could be added in the future, but there isn't a strong use case
for more complex operations anyway, and a second math node can be used.

Differential Revision: https://developer.blender.org/D10269

1 files changed, 10 insertions, 0 deletions

diff --git a/source/blender/blenlib/BLI_hash.h b/source/blender/blenlib/BLI_hash.h
index d687e805323..cfd39ea3cf8 100644
--- a/source/blender/blenlib/BLI_hash.h
+++ b/source/blender/blenlib/BLI_hash.h
@@ -90,6 +90,16 @@ BLI_INLINE unsigned int BLI_hash_string(const char *str)
   return i;
 }
 
+BLI_INLINE float BLI_hash_int_2d_to_float(uint32_t kx, uint32_t ky)
+{
+  return (float)BLI_hash_int_2d(kx, ky) / (float)0xFFFFFFFFu;
+}
+
+BLI_INLINE float BLI_hash_int_3d_to_float(uint32_t kx, uint32_t ky, uint32_t kz)
+{
+  return (float)BLI_hash_int_3d(kx, ky, kz) / (float)0xFFFFFFFFu;
+}
+
 BLI_INLINE unsigned int BLI_hash_int(unsigned int k)
 {
   return BLI_hash_int_2d(k, 0);