Geometry Nodes - Object Info: option to apply obj transform to the geometry

By design the modified object transformations should still work and
affect the geometry nodes results. The current behaviour, however, would
make the geometry from the object info to not be affected by the
modified object transformations. This patch changes that by default.

In a similar fashion the Location, Rotation and Scale sockets outputs
should be aware of whether the output should be in the global space or in the
space of the nodetree.

To solve this, the patch introduces a new transformation space "enum"
where users can pick "Original" or "Relative" space.

Original
--------
Output the geometry relative to the input object transform, and the
location, rotation and scale relative to the world origin.

Relative
--------
Bring the input object geometry, location, rotation and scale into the
modified object maintaining the relative position between the two objects in
the scene.

Relative space violates a bit the design of the nodetree. The geometry in this
case is transformed so that moving the modified object doesn't interfere with
the geometry. This is particularly useful for the boolean node for instance.

"Original" is the default space, but old files are set to "Relative" for
backwards compatibility.

Differential Revision: https://developer.blender.org/D10124

1 files changed, 12 insertions, 0 deletions

diff --git a/source/blender/makesdna/DNA_node_types.h b/source/blender/makesdna/DNA_node_types.h
index b6904f6ae5b..7d18ff3ed58 100644
--- a/source/blender/makesdna/DNA_node_types.h
+++ b/source/blender/makesdna/DNA_node_types.h
@@ -1167,6 +1167,13 @@ typedef struct NodeGeometryPointTranslate {
   char _pad[7];
 } NodeGeometryPointTranslate;
 
+typedef struct NodeGeometryObjectInfo {
+  /* GeometryNodeTransformSpace. */
+  uint8_t transform_space;
+
+  char _pad[7];
+} NodeGeometryObjectInfo;
+
 /* script node mode */
 #define NODE_SCRIPT_INTERNAL 0
 #define NODE_SCRIPT_EXTERNAL 1
@@ -1608,6 +1615,11 @@ typedef enum GeometryNodeAlignRotationToVectorAxis {
   GEO_NODE_ALIGN_ROTATION_TO_VECTOR_AXIS_Z = 2,
 } GeometryNodeAlignRotationToVectorAxis;
 
+typedef enum GeometryNodeTransformSpace {
+  GEO_NODE_TRANSFORM_SPACE_ORIGINAL = 0,
+  GEO_NODE_TRANSFORM_SPACE_RELATIVE = 1,
+} GeometryNodeTransformSpace;
+
 #ifdef __cplusplus
 }
 #endif