Shading: Extend Noise node to other dimenstions.

This patch extends perlin noise to operate in 1D, 2D, 3D, and 4D
space. The noise code has also been refactored to be more readable.

The Color output and distortion patterns changed, so this patch
breaks backward compatibility. This is due to the fact that we
now use random offsets as noise seeds, as opposed to swizzling
and constants offsets.

Reviewers: brecht, JacquesLucke

Differential Revision: https://developer.blender.org/D5560

1 files changed, 22 insertions, 0 deletions

diff --git a/source/blender/blenloader/intern/versioning_cycles.c b/source/blender/blenloader/intern/versioning_cycles.c
index a3e9b8dc206..6a99ba2db58 100644
--- a/source/blender/blenloader/intern/versioning_cycles.c
+++ b/source/blender/blenloader/intern/versioning_cycles.c
@@ -756,6 +756,19 @@ static void update_vector_math_node_average_operator(bNodeTree *ntree)
   }
 }
 
+/* The Noise node now have a dimension property. This property should be
+ * initialized to 3 by default.
+ */
+static void update_noise_node_dimensions(bNodeTree *ntree)
+{
+  for (bNode *node = ntree->nodes.first; node; node = node->next) {
+    if (node->type == SH_NODE_TEX_NOISE) {
+      NodeTexNoise *tex = (NodeTexNoise *)node->storage;
+      tex->dimensions = 3;
+    }
+  }
+}
+
 void blo_do_versions_cycles(FileData *UNUSED(fd), Library *UNUSED(lib), Main *bmain)
 {
   /* Particle shape shared with Eevee. */
@@ -928,4 +941,13 @@ void do_versions_after_linking_cycles(Main *bmain)
     }
     FOREACH_NODETREE_END;
   }
+
+  if (!MAIN_VERSION_ATLEAST(bmain, 281, 4)) {
+    FOREACH_NODETREE_BEGIN (bmain, ntree, id) {
+      if (ntree->type == NTREE_SHADER) {
+        update_noise_node_dimensions(ntree);
+      }
+    }
+    FOREACH_NODETREE_END;
+  }
 }