Added a bunch of additional particle state attributes to the Cycles particle info node:

* Location: Basically the same as the location from Object Info node for object instances on particles, but in principle there could be additional offsets for dupli objects, so included for completeness.
* Size: Single float scale of the particle. Also directly translates to object scale for current dupli objects, but handy to have as a single float to start with instead of a scale vector (currently not even exposed in Object Info).
* Rotation: This is a quaternion, which are not yet supported by Cycles nodes. The float4 is copied to internal Cycles data and stored in the particles texture data, but the node doesn't have a socket for it yet and the data is not yet written to the stack. Code is just commented out so could be enabled quickly if/when rotation support is added to cycles.
* Velocity: Linear velocity vector of particles.
* Angular Velocity: Angular velocity around principle axes.

The texture data is currently packed tightly into the particles texture, which saves a few bytes, but requires an additional texture lookup for some vector attributes which spread over two float4s. Could also add another float4 to particle size to avoid this.

1 files changed, 7 insertions, 0 deletions

diff --git a/source/blender/nodes/shader/nodes/node_shader_particle_info.c b/source/blender/nodes/shader/nodes/node_shader_particle_info.c
index 5be8925b556..ddfcb9476f4 100644
--- a/source/blender/nodes/shader/nodes/node_shader_particle_info.c
+++ b/source/blender/nodes/shader/nodes/node_shader_particle_info.c
@@ -31,6 +31,13 @@ static bNodeSocketTemplate outputs[] = {
     { SOCK_FLOAT,  0, "Index" },
     { SOCK_FLOAT,  0, "Age" },
     { SOCK_FLOAT,  0, "Lifetime" },
+    { SOCK_VECTOR,  0, "Location" },
+    #if 0	/* quaternion sockets not yet supported */
+    { SOCK_QUATERNION,  0, "Rotation" },
+    #endif
+    { SOCK_FLOAT,  0, "Size" },
+    { SOCK_VECTOR,  0, "Velocity" },
+    { SOCK_VECTOR,  0, "Angular Velocity" },
     { -1, 0, "" }
 };