BGE: TrackTo actuator: increasing up & track axis options

This is related to Task T34861 to increase up & track axis options for TrackTo actuator. I've just added it to differential to facilitate an easier review.

With the patch applied you can select X, Y and Z axis for the Up axis, and X, Y, Z, -X, -Y and -Z for the track axis.

Related to the implementation I have used the algorithm from Trackto constrain placed in constrain.c but adapted to be used with MOTO library.

The wiki docs are here (http://wiki.blender.org/index.php/User:Lordloki/Doc:2.6/Manual/Game_Engine/Logic/Actuators/Edit_Object#Trackto_Actuator).

Test file is here: {F97623}

I have also uploaded 2 screenshots showing the UI modifications to the TrackTo actuator:

{F91992} {F91990}

Reviewers: moguri, dfelinto

Reviewed By: moguri

CC: Genome36

Differential Revision: https://developer.blender.org/D565

1 files changed, 24 insertions, 0 deletions

diff --git a/source/blender/blenloader/intern/versioning_270.c b/source/blender/blenloader/intern/versioning_270.c
index 103f9b76ba7..dde16c8d44f 100644
--- a/source/blender/blenloader/intern/versioning_270.c
+++ b/source/blender/blenloader/intern/versioning_270.c
@@ -42,6 +42,7 @@
 #include "DNA_mesh_types.h"
 #include "DNA_modifier_types.h"
 #include "DNA_linestyle_types.h"
+#include "DNA_actuator_types.h"
 
 #include "DNA_genfile.h"
 
@@ -310,6 +311,29 @@ void blo_do_versions_270(FileData *fd, Library *UNUSED(lib), Main *main)
 		}
 	}
 
+	if (!MAIN_VERSION_ATLEAST(main, 271, 2)) {
+		/* init up & track axis property of trackto actuators */
+		Object *ob;
+
+		for (ob = main->object.first; ob; ob = ob->id.next) {
+			bActuator *act;
+			for (act = ob->actuators.first; act; act = act->next) {
+				if (act->type == ACT_EDIT_OBJECT) {
+					bEditObjectActuator *eoact = act->data;
+					eoact->trackflag = ob->trackflag;
+					/* if trackflag is pointing +-Z axis then upflag should point Y axis.
+					 * Rest of trackflag cases, upflag should be point z axis */
+					if ((ob->trackflag == OB_POSZ) || (ob->trackflag == OB_NEGZ)) {
+						eoact->upflag = 1;
+					}
+					else {
+						eoact->upflag = 2;
+					}
+				}
+			}
+		}
+	}
+
 	if (!DNA_struct_elem_find(fd->filesdna, "RenderData", "int", "preview_start_resolution")) {
 		Scene *scene;
 		for (scene = main->scene.first; scene; scene = scene->id.next) {