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, 4 insertions, 0 deletions

diff --git a/source/blender/blenkernel/intern/sca.c b/source/blender/blenkernel/intern/sca.c
index 1310162483e..4be75344133 100644
--- a/source/blender/blenkernel/intern/sca.c
+++ b/source/blender/blenkernel/intern/sca.c
@@ -392,6 +392,7 @@ void init_actuator(bActuator *act)
 	bSteeringActuator *sta;
 	bArmatureActuator *arma;
 	bMouseActuator *ma;
+	bEditObjectActuator *eoa;
 	
 	if (act->data) MEM_freeN(act->data);
 	act->data= NULL;
@@ -430,6 +431,9 @@ void init_actuator(bActuator *act)
 		break;
 	case ACT_EDIT_OBJECT:
 		act->data= MEM_callocN(sizeof(bEditObjectActuator), "editobact");
+		eoa = act->data;
+		eoa->upflag= ACT_TRACK_UP_Z;
+		eoa->trackflag= ACT_TRACK_TRAXIS_Y;
 		break;
 	case ACT_CONSTRAINT:
 		act->data= MEM_callocN(sizeof(bConstraintActuator), "cons act");