missed adding the file when moving fly mode.

1 files changed, 941 insertions, 0 deletions

diff --git a/source/blender/editors/space_view3d/view3d_fly.c b/source/blender/editors/space_view3d/view3d_fly.c
new file mode 100644
index 00000000000..db83cd4b364
--- /dev/null
+++ b/source/blender/editors/space_view3d/view3d_fly.c
@@ -0,0 +1,941 @@
+/**
+ * $Id: view3d_view.c 32630 2010-10-21 09:02:21Z campbellbarton $
+ *
+ * ***** BEGIN GPL LICENSE BLOCK *****
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version. 
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * 
+ * Contributor(s): Campbell Barton
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+/* defines VIEW3D_OT_fly modal operator */
+
+#include "DNA_anim_types.h"
+#include "DNA_scene_types.h"
+#include "DNA_object_types.h"
+
+#include "MEM_guardedalloc.h"
+
+#include "BLI_math.h"
+#include "BLI_blenlib.h"
+
+#include "BKE_context.h"
+#include "BKE_object.h"
+#include "BKE_report.h"
+
+#include "BKE_depsgraph.h" /* for fly mode updating */
+
+#include "BIF_gl.h"
+
+#include "WM_api.h"
+#include "WM_types.h"
+
+#include "ED_keyframing.h"
+#include "ED_screen.h"
+#include "ED_space_api.h"
+
+#include "PIL_time.h" /* smoothview */
+
+#include "view3d_intern.h"	// own include
+
+/* NOTE: these defines are saved in keymap files, do not change values but just add new ones */
+#define FLY_MODAL_CANCEL			1
+#define FLY_MODAL_CONFIRM			2
+#define FLY_MODAL_ACCELERATE 		3
+#define FLY_MODAL_DECELERATE		4
+#define FLY_MODAL_PAN_ENABLE		5
+#define FLY_MODAL_PAN_DISABLE		6
+#define FLY_MODAL_DIR_FORWARD		7
+#define FLY_MODAL_DIR_BACKWARD		8
+#define FLY_MODAL_DIR_LEFT			9
+#define FLY_MODAL_DIR_RIGHT			10
+#define FLY_MODAL_DIR_UP			11
+#define FLY_MODAL_DIR_DOWN			12
+#define FLY_MODAL_AXIS_LOCK_X		13
+#define FLY_MODAL_AXIS_LOCK_Z		14
+#define FLY_MODAL_PRECISION_ENABLE	15
+#define FLY_MODAL_PRECISION_DISABLE	16
+
+/* called in transform_ops.c, on each regeneration of keymaps  */
+void fly_modal_keymap(wmKeyConfig *keyconf)
+{
+	static EnumPropertyItem modal_items[] = {
+	{FLY_MODAL_CANCEL,	"CANCEL", 0, "Cancel", ""},
+	{FLY_MODAL_CONFIRM,	"CONFIRM", 0, "Confirm", ""},
+	{FLY_MODAL_ACCELERATE, "ACCELERATE", 0, "Accelerate", ""},
+	{FLY_MODAL_DECELERATE, "DECELERATE", 0, "Decelerate", ""},
+
+	{FLY_MODAL_PAN_ENABLE,	"PAN_ENABLE", 0, "Pan Enable", ""},
+	{FLY_MODAL_PAN_DISABLE,	"PAN_DISABLE", 0, "Pan Disable", ""},
+
+	{FLY_MODAL_DIR_FORWARD,	"FORWARD", 0, "Fly Forward", ""},
+	{FLY_MODAL_DIR_BACKWARD,"BACKWARD", 0, "Fly Backward", ""},
+	{FLY_MODAL_DIR_LEFT,	"LEFT", 0, "Fly Left", ""},
+	{FLY_MODAL_DIR_RIGHT,	"RIGHT", 0, "Fly Right", ""},
+	{FLY_MODAL_DIR_UP,		"UP", 0, "Fly Up", ""},
+	{FLY_MODAL_DIR_DOWN,	"DOWN", 0, "Fly Down", ""},
+
+	{FLY_MODAL_AXIS_LOCK_X,	"AXIS_LOCK_X", 0, "X Axis Correction", "X axis correction (toggle)"},
+	{FLY_MODAL_AXIS_LOCK_Z,	"AXIS_LOCK_Z", 0, "X Axis Correction", "Z axis correction (toggle)"},
+
+	{FLY_MODAL_PRECISION_ENABLE,	"PRECISION_ENABLE", 0, "Precision Enable", ""},
+	{FLY_MODAL_PRECISION_DISABLE,	"PRECISION_DISABLE", 0, "Precision Disable", ""},
+
+	{0, NULL, 0, NULL, NULL}};
+
+	wmKeyMap *keymap= WM_modalkeymap_get(keyconf, "View3D Fly Modal");
+
+	/* this function is called for each spacetype, only needs to add map once */
+	if(keymap) return;
+
+	keymap= WM_modalkeymap_add(keyconf, "View3D Fly Modal", modal_items);
+
+	/* items for modal map */
+	WM_modalkeymap_add_item(keymap, ESCKEY,    KM_PRESS, KM_ANY, 0, FLY_MODAL_CANCEL);
+	WM_modalkeymap_add_item(keymap, RIGHTMOUSE, KM_ANY, KM_ANY, 0, FLY_MODAL_CANCEL);
+
+	WM_modalkeymap_add_item(keymap, LEFTMOUSE, KM_ANY, KM_ANY, 0, FLY_MODAL_CONFIRM);
+	WM_modalkeymap_add_item(keymap, RETKEY, KM_PRESS, KM_ANY, 0, FLY_MODAL_CONFIRM);
+	WM_modalkeymap_add_item(keymap, SPACEKEY, KM_PRESS, KM_ANY, 0, FLY_MODAL_CONFIRM);
+	WM_modalkeymap_add_item(keymap, PADENTER, KM_PRESS, KM_ANY, 0, FLY_MODAL_CONFIRM);
+
+	WM_modalkeymap_add_item(keymap, PADPLUSKEY, KM_PRESS, 0, 0, FLY_MODAL_ACCELERATE);
+	WM_modalkeymap_add_item(keymap, PADMINUS, KM_PRESS, 0, 0, FLY_MODAL_DECELERATE);
+	WM_modalkeymap_add_item(keymap, WHEELUPMOUSE, KM_PRESS, 0, 0, FLY_MODAL_ACCELERATE);
+	WM_modalkeymap_add_item(keymap, WHEELDOWNMOUSE, KM_PRESS, 0, 0, FLY_MODAL_DECELERATE);
+
+	WM_modalkeymap_add_item(keymap, MIDDLEMOUSE, KM_PRESS, KM_ANY, 0, FLY_MODAL_PAN_ENABLE);
+	WM_modalkeymap_add_item(keymap, MIDDLEMOUSE, KM_RELEASE, KM_ANY, 0, FLY_MODAL_PAN_DISABLE); /* XXX - Bug in the event system, middle mouse release doesnt work */
+
+	/* WASD */
+	WM_modalkeymap_add_item(keymap, WKEY, KM_PRESS, 0, 0, FLY_MODAL_DIR_FORWARD);
+	WM_modalkeymap_add_item(keymap, SKEY, KM_PRESS, 0, 0, FLY_MODAL_DIR_BACKWARD);
+	WM_modalkeymap_add_item(keymap, AKEY, KM_PRESS, 0, 0, FLY_MODAL_DIR_LEFT);
+	WM_modalkeymap_add_item(keymap, DKEY, KM_PRESS, 0, 0, FLY_MODAL_DIR_RIGHT);
+	WM_modalkeymap_add_item(keymap, RKEY, KM_PRESS, 0, 0, FLY_MODAL_DIR_UP);
+	WM_modalkeymap_add_item(keymap, FKEY, KM_PRESS, 0, 0, FLY_MODAL_DIR_DOWN);
+
+	WM_modalkeymap_add_item(keymap, XKEY, KM_PRESS, 0, 0, FLY_MODAL_AXIS_LOCK_X);
+	WM_modalkeymap_add_item(keymap, ZKEY, KM_PRESS, 0, 0, FLY_MODAL_AXIS_LOCK_Z);
+
+	WM_modalkeymap_add_item(keymap, LEFTSHIFTKEY, KM_PRESS, KM_ANY, 0, FLY_MODAL_PRECISION_ENABLE);
+	WM_modalkeymap_add_item(keymap, LEFTSHIFTKEY, KM_RELEASE, KM_ANY, 0, FLY_MODAL_PRECISION_DISABLE);
+
+	/* assign map to operators */
+	WM_modalkeymap_assign(keymap, "VIEW3D_OT_fly");
+
+}
+
+typedef struct FlyInfo {
+	/* context stuff */
+	RegionView3D *rv3d;
+	View3D *v3d;
+	ARegion *ar;
+	Scene *scene;
+
+	wmTimer *timer; /* needed for redraws */
+
+	short state;
+	short use_precision;
+	short redraw;
+	short mval[2];
+
+	/* fly state state */
+	float speed; /* the speed the view is moving per redraw */
+	short axis; /* Axis index to move allong by default Z to move allong the view */
+	short pan_view; /* when true, pan the view instead of rotating */
+
+	/* relative view axis locking - xlock, zlock
+	0; disabled
+	1; enabled but not checking because mouse hasnt moved outside the margin since locking was checked an not needed
+	   when the mouse moves, locking is set to 2 so checks are done.
+	2; mouse moved and checking needed, if no view altering is donem its changed back to 1 */
+	short xlock, zlock;
+	float xlock_momentum, zlock_momentum; /* nicer dynamics */
+	float grid; /* world scale 1.0 default */
+
+	/* root most parent */
+	Object *root_parent;
+
+	/* backup values */
+	float dist_backup; /* backup the views distance since we use a zero dist for fly mode */
+	float ofs_backup[3]; /* backup the views offset incase the user cancels flying in non camera mode */
+	float rot_backup[4]; /* backup the views quat incase the user cancels flying in non camera mode. (quat for view, eul for camera) */
+	short persp_backup; /* remember if were ortho or not, only used for restoring the view if it was a ortho view */
+
+	void *obtfm; /* backup the objects transform */
+
+	/* compare between last state */
+	double time_lastwheel; /* used to accelerate when using the mousewheel a lot */
+	double time_lastdraw; /* time between draws */
+
+	void *draw_handle_pixel;
+
+	/* use for some lag */
+	float dvec_prev[3]; /* old for some lag */
+
+} FlyInfo;
+
+static void drawFlyPixel(const struct bContext *UNUSED(C), struct ARegion *UNUSED(ar), void *arg)
+{
+	FlyInfo *fly = arg;
+
+	/* draws 4 edge brackets that frame the safe area where the
+	mouse can move during fly mode without spinning the view */
+	float x1, x2, y1, y2;
+	
+	x1= 0.45*(float)fly->ar->winx;
+	y1= 0.45*(float)fly->ar->winy;
+	x2= 0.55*(float)fly->ar->winx;
+	y2= 0.55*(float)fly->ar->winy;
+	cpack(0);
+	
+	
+	glBegin(GL_LINES);
+	/* bottom left */
+	glVertex2f(x1,y1); 
+	glVertex2f(x1,y1+5);
+	
+	glVertex2f(x1,y1); 
+	glVertex2f(x1+5,y1);
+	
+	/* top right */
+	glVertex2f(x2,y2); 
+	glVertex2f(x2,y2-5);
+	
+	glVertex2f(x2,y2); 
+	glVertex2f(x2-5,y2);
+	
+	/* top left */
+	glVertex2f(x1,y2); 
+	glVertex2f(x1,y2-5);
+	
+	glVertex2f(x1,y2); 
+	glVertex2f(x1+5,y2);
+	
+	/* bottom right */
+	glVertex2f(x2,y1); 
+	glVertex2f(x2,y1+5);
+	
+	glVertex2f(x2,y1); 
+	glVertex2f(x2-5,y1);
+	glEnd();
+}
+
+/* FlyInfo->state */
+#define FLY_RUNNING		0
+#define FLY_CANCEL		1
+#define FLY_CONFIRM		2
+
+static int initFlyInfo (bContext *C, FlyInfo *fly, wmOperator *op, wmEvent *event)
+{
+	float upvec[3]; // tmp
+	float mat[3][3];
+
+	fly->rv3d= CTX_wm_region_view3d(C);
+	fly->v3d = CTX_wm_view3d(C);
+	fly->ar = CTX_wm_region(C);
+	fly->scene= CTX_data_scene(C);
+
+	if(fly->rv3d->persp==RV3D_CAMOB && fly->v3d->camera->id.lib) {
+		BKE_report(op->reports, RPT_ERROR, "Cannot fly a camera from an external library");
+		return FALSE;
+	}
+
+	if(fly->v3d->ob_centre) {
+		BKE_report(op->reports, RPT_ERROR, "Cannot fly when the view is locked to an object");
+		return FALSE;
+	}
+
+	if(fly->rv3d->persp==RV3D_CAMOB && fly->v3d->camera->constraints.first) {
+		BKE_report(op->reports, RPT_ERROR, "Cannot fly an object with constraints");
+		return FALSE;
+	}
+
+	fly->state= FLY_RUNNING;
+	fly->speed= 0.0f;
+	fly->axis= 2;
+	fly->pan_view= FALSE;
+	fly->xlock= FALSE;
+	fly->zlock= FALSE;
+	fly->xlock_momentum=0.0f;
+	fly->zlock_momentum=0.0f;
+	fly->grid= 1.0f;
+	fly->use_precision= 0;
+
+	fly->dvec_prev[0]= fly->dvec_prev[1]= fly->dvec_prev[2]= 0.0f;
+
+	fly->timer= WM_event_add_timer(CTX_wm_manager(C), CTX_wm_window(C), TIMER, 0.01f);
+
+	fly->mval[0] = event->x - fly->ar->winrct.xmin;
+	fly->mval[1] = event->y - fly->ar->winrct.ymin;
+
+
+	fly->time_lastdraw= fly->time_lastwheel= PIL_check_seconds_timer();
+
+	fly->draw_handle_pixel = ED_region_draw_cb_activate(fly->ar->type, drawFlyPixel, fly, REGION_DRAW_POST_PIXEL);
+
+	fly->rv3d->rflag |= RV3D_NAVIGATING; /* so we draw the corner margins */
+
+	/* detect weather to start with Z locking */
+	upvec[0]=1.0f; upvec[1]=0.0f; upvec[2]=0.0f;
+	copy_m3_m4(mat, fly->rv3d->viewinv);
+	mul_m3_v3(mat, upvec);
+	if (fabs(upvec[2]) < 0.1)
+		fly->zlock = 1;
+	upvec[0]=0; upvec[1]=0; upvec[2]=0;
+
+	fly->persp_backup= fly->rv3d->persp;
+	fly->dist_backup= fly->rv3d->dist;
+	if (fly->rv3d->persp==RV3D_CAMOB) {
+		Object *ob_back;
+		if((fly->root_parent=fly->v3d->camera->parent)) {
+			while(fly->root_parent->parent)
+				fly->root_parent= fly->root_parent->parent;
+			ob_back= fly->root_parent;
+		}
+		else {
+			ob_back= fly->v3d->camera;
+		}
+
+		/* store the original camera loc and rot */
+		/* TODO. axis angle etc */
+
+		fly->obtfm= object_tfm_backup(ob_back);
+
+		where_is_object(fly->scene, fly->v3d->camera);
+		negate_v3_v3(fly->rv3d->ofs, fly->v3d->camera->obmat[3]);
+
+		fly->rv3d->dist=0.0;
+	} else {
+		/* perspective or ortho */
+		if (fly->rv3d->persp==RV3D_ORTHO)
+			fly->rv3d->persp= RV3D_PERSP; /*if ortho projection, make perspective */
+		copy_qt_qt(fly->rot_backup, fly->rv3d->viewquat);
+		copy_v3_v3(fly->ofs_backup, fly->rv3d->ofs);
+		fly->rv3d->dist= 0.0f;
+
+		upvec[2]= fly->dist_backup; /*x and y are 0*/
+		mul_m3_v3(mat, upvec);
+		sub_v3_v3(fly->rv3d->ofs, upvec);
+		/*Done with correcting for the dist*/
+	}
+
+	
+	/* center the mouse, probably the UI mafia are against this but without its quite annoying */
+	WM_cursor_warp(CTX_wm_window(C), fly->ar->winrct.xmin + fly->ar->winx/2, fly->ar->winrct.ymin + fly->ar->winy/2);
+	
+	return 1;
+}
+
+static int flyEnd(bContext *C, FlyInfo *fly)
+{
+	RegionView3D *rv3d= fly->rv3d;
+	View3D *v3d = fly->v3d;
+
+	float upvec[3];
+
+	if(fly->state == FLY_RUNNING)
+		return OPERATOR_RUNNING_MODAL;
+
+	WM_event_remove_timer(CTX_wm_manager(C), CTX_wm_window(C), fly->timer);
+
+	ED_region_draw_cb_exit(fly->ar->type, fly->draw_handle_pixel);
+
+	rv3d->dist= fly->dist_backup;
+
+	if (fly->state == FLY_CANCEL) {
+	/* Revert to original view? */
+		if (fly->persp_backup==RV3D_CAMOB) { /* a camera view */
+			Object *ob_back;
+			if(fly->root_parent)ob_back= fly->root_parent;
+			else				ob_back= fly->v3d->camera;
+
+			/* store the original camera loc and rot */
+			object_tfm_restore(ob_back, fly->obtfm);
+
+			DAG_id_flush_update(&ob_back->id, OB_RECALC_OB);
+		} else {
+			/* Non Camera we need to reset the view back to the original location bacause the user canceled*/
+			copy_qt_qt(rv3d->viewquat, fly->rot_backup);
+			copy_v3_v3(rv3d->ofs, fly->ofs_backup);
+			rv3d->persp= fly->persp_backup;
+		}
+	}
+	else if (fly->persp_backup==RV3D_CAMOB) {	/* camera */
+		float mat3[3][3];
+		if(fly->root_parent) {
+			DAG_id_flush_update(&fly->root_parent->id, OB_RECALC_OB);
+		}
+		else {
+			copy_m3_m4(mat3, v3d->camera->obmat);
+			object_mat3_to_rot(v3d->camera, mat3, TRUE);
+			DAG_id_flush_update(&v3d->camera->id, OB_RECALC_OB);
+		}
+	}
+	else { /* not camera */
+		/* Apply the fly mode view */
+		/*restore the dist*/
+		float mat[3][3];
+		upvec[0]= upvec[1]= 0;
+		upvec[2]= fly->dist_backup; /*x and y are 0*/
+		copy_m3_m4(mat, rv3d->viewinv);
+		mul_m3_v3(mat, upvec);
+		add_v3_v3(rv3d->ofs, upvec);
+		/*Done with correcting for the dist */
+	}
+
+	rv3d->rflag &= ~RV3D_NAVIGATING;
+//XXX2.5	BIF_view3d_previewrender_signal(fly->sa, PR_DBASE|PR_DISPRECT); /* not working at the moment not sure why */
+
+	if(fly->obtfm)
+		MEM_freeN(fly->obtfm);
+
+	if(fly->state == FLY_CONFIRM) {
+		MEM_freeN(fly);
+		return OPERATOR_FINISHED;
+	}
+
+	MEM_freeN(fly);
+	return OPERATOR_CANCELLED;
+}
+
+static void flyEvent(FlyInfo *fly, wmEvent *event)
+{
+	if (event->type == TIMER && event->customdata == fly->timer) {
+		fly->redraw = 1;
+	}
+	else if (event->type == MOUSEMOVE) {
+		fly->mval[0] = event->x - fly->ar->winrct.xmin;
+		fly->mval[1] = event->y - fly->ar->winrct.ymin;
+	} /* handle modal keymap first */
+	else if (event->type == EVT_MODAL_MAP) {
+		switch (event->val) {
+			case FLY_MODAL_CANCEL:
+				fly->state = FLY_CANCEL;
+				break;
+			case FLY_MODAL_CONFIRM:
+				fly->state = FLY_CONFIRM;
+				break;
+
+			case FLY_MODAL_ACCELERATE:
+			{
+				double time_currwheel;
+				float time_wheel;
+
+				time_currwheel= PIL_check_seconds_timer();
+				time_wheel = (float)(time_currwheel - fly->time_lastwheel);
+				fly->time_lastwheel = time_currwheel;
+				/*printf("Wheel %f\n", time_wheel);*/
+				/*Mouse wheel delays range from 0.5==slow to 0.01==fast*/
+				time_wheel = 1+ (10 - (20*MIN2(time_wheel, 0.5))); /* 0-0.5 -> 0-5.0 */
+
+				if (fly->speed<0.0f) fly->speed= 0.0f;
+				else {
+					if (event->shift)
+						fly->speed+= fly->grid*time_wheel*0.1;
+					else
+						fly->speed+= fly->grid*time_wheel;
+				}
+				break;
+			}
+			case FLY_MODAL_DECELERATE:
+			{
+				double time_currwheel;
+				float time_wheel;
+
+				time_currwheel= PIL_check_seconds_timer();
+				time_wheel = (float)(time_currwheel - fly->time_lastwheel);
+				fly->time_lastwheel = time_currwheel;
+				time_wheel = 1+ (10 - (20*MIN2(time_wheel, 0.5))); /* 0-0.5 -> 0-5.0 */
+
+				if (fly->speed>0) fly->speed=0;
+				else {
+					if (event->shift)
+						fly->speed-= fly->grid*time_wheel*0.1;
+					else
+						fly->speed-= fly->grid*time_wheel;
+				}
+				break;
+			}
+			case FLY_MODAL_PAN_ENABLE:
+				fly->pan_view= TRUE;
+				break;
+			case FLY_MODAL_PAN_DISABLE:
+//XXX2.5		warp_pointer(cent_orig[0], cent_orig[1]);
+				fly->pan_view= FALSE;
+				break;
+
+				/* impliment WASD keys */
+			case FLY_MODAL_DIR_FORWARD:
+				if (fly->speed < 0.0f) fly->speed= -fly->speed; /* flip speed rather then stopping, game like motion */
+				else if (fly->axis==2) fly->speed += fly->grid; /* increse like mousewheel if were already moving in that difection*/
+				fly->axis= 2;
+				break;
+			case FLY_MODAL_DIR_BACKWARD:
+				if (fly->speed > 0.0f) fly->speed= -fly->speed;
+				else if (fly->axis==2) fly->speed -= fly->grid;
+				fly->axis= 2;
+				break;
+			case FLY_MODAL_DIR_LEFT:
+				if (fly->speed < 0.0f) fly->speed= -fly->speed;
+				else if (fly->axis==0) fly->speed += fly->grid;
+				fly->axis= 0;
+				break;
+			case FLY_MODAL_DIR_RIGHT:
+				if (fly->speed > 0.0f) fly->speed= -fly->speed;
+				else if (fly->axis==0) fly->speed -= fly->grid;
+				fly->axis= 0;
+				break;
+			case FLY_MODAL_DIR_DOWN:
+				if (fly->speed < 0.0f) fly->speed= -fly->speed;
+				else if (fly->axis==1) fly->speed += fly->grid;
+				fly->axis= 1;
+				break;
+			case FLY_MODAL_DIR_UP:
+				if (fly->speed > 0.0f) fly->speed= -fly->speed;
+				else if (fly->axis==1) fly->speed -= fly->grid;
+				fly->axis= 1;
+				break;
+
+			case FLY_MODAL_AXIS_LOCK_X:
+				if (fly->xlock) fly->xlock=0;
+				else {
+					fly->xlock = 2;
+					fly->xlock_momentum = 0.0;
+				}
+				break;
+			case FLY_MODAL_AXIS_LOCK_Z:
+				if (fly->zlock) fly->zlock=0;
+				else {
+					fly->zlock = 2;
+					fly->zlock_momentum = 0.0;
+				}
+				break;
+
+			case FLY_MODAL_PRECISION_ENABLE:
+				fly->use_precision= TRUE;
+				break;
+			case FLY_MODAL_PRECISION_DISABLE:
+				fly->use_precision= FALSE;
+				break;
+
+		}
+	}
+}
+
+static int flyApply(bContext *C, FlyInfo *fly)
+{
+
+#define FLY_ROTATE_FAC 2.5f /* more is faster */
+#define FLY_ZUP_CORRECT_FAC 0.1f /* ammount to correct per step */
+#define FLY_ZUP_CORRECT_ACCEL 0.05f /* increase upright momentum each step */
+
+	/*
+	fly mode - Shift+F
+	a fly loop where the user can move move the view as if they are flying
+	*/
+	RegionView3D *rv3d= fly->rv3d;
+	View3D *v3d = fly->v3d;
+	ARegion *ar = fly->ar;
+	Scene *scene= fly->scene;
+
+	float prev_view_mat[4][4];
+
+	float mat[3][3], /* 3x3 copy of the view matrix so we can move allong the view axis */
+	dvec[3]={0,0,0}, /* this is the direction thast added to the view offset per redraw */
+
+	/* Camera Uprighting variables */
+	upvec[3]={0,0,0}, /* stores the view's up vector */
+
+	moffset[2], /* mouse offset from the views center */
+	tmp_quat[4]; /* used for rotating the view */
+
+	int cent_orig[2], /* view center */
+//XXX- can avoid using // 	cent[2], /* view center modified */
+	xmargin, ymargin; /* x and y margin are define the safe area where the mouses movement wont rotate the view */
+	unsigned char
+	apply_rotation= 1; /* if the user presses shift they can look about without movinf the direction there looking*/
+
+	if(fly->root_parent)
+		view3d_persp_mat4(rv3d, prev_view_mat);
+
+	/* the dist defines a vector that is infront of the offset
+	to rotate the view about.
+	this is no good for fly mode because we
+	want to rotate about the viewers center.
+	but to correct the dist removal we must
+	alter offset so the view doesn't jump. */
+
+	xmargin= ar->winx/20.0f;
+	ymargin= ar->winy/20.0f;
+
+	cent_orig[0]= ar->winrct.xmin + ar->winx/2;
+	cent_orig[1]= ar->winrct.ymin + ar->winy/2;
+
+	{
+
+		/* mouse offset from the center */
+		moffset[0]= fly->mval[0]- ar->winx/2;
+		moffset[1]= fly->mval[1]- ar->winy/2;
+
+		/* enforce a view margin */
+		if (moffset[0]>xmargin)			moffset[0]-=xmargin;
+		else if (moffset[0] < -xmargin)	moffset[0]+=xmargin;
+		else							moffset[0]=0;
+
+		if (moffset[1]>ymargin)			moffset[1]-=ymargin;
+		else if (moffset[1] < -ymargin)	moffset[1]+=ymargin;
+		else							moffset[1]=0;
+
+
+		/* scale the mouse movement by this value - scales mouse movement to the view size
+		 * moffset[0]/(ar->winx-xmargin*2) - window size minus margin (same for y)
+		 *
+		 * the mouse moves isnt linear */
+
+		if(moffset[0]) {
+			moffset[0] /= ar->winx - (xmargin*2);
+			moffset[0] *= fabs(moffset[0]);
+		}
+
+		if(moffset[1]) {
+			moffset[1] /= ar->winy - (ymargin*2);
+			moffset[1] *= fabs(moffset[1]);
+		}
+
+		/* Should we redraw? */
+		if(fly->speed != 0.0f || moffset[0] || moffset[1] || fly->zlock || fly->xlock || dvec[0] || dvec[1] || dvec[2] ) {
+			float dvec_tmp[3];
+			double time_current, time_redraw; /*time how fast it takes for us to redraw, this is so simple scenes dont fly too fast */
+			float time_redraw_clamped;
+
+			time_current= PIL_check_seconds_timer();
+			time_redraw= (float)(time_current - fly->time_lastdraw);
+			time_redraw_clamped= MIN2(0.05f, time_redraw); /* clamt the redraw time to avoid jitter in roll correction */
+			fly->time_lastdraw= time_current;
+			/*fprintf(stderr, "%f\n", time_redraw);*/ /* 0.002 is a small redraw 0.02 is larger */
+
+			/* Scale the time to use shift to scale the speed down- just like
+			shift slows many other areas of blender down */
+			if (fly->use_precision)
+				fly->speed= fly->speed * (1.0f-time_redraw_clamped);
+
+			copy_m3_m4(mat, rv3d->viewinv);
+
+			if (fly->pan_view==TRUE) {
+				/* pan only */
+				dvec_tmp[0]= -moffset[0];
+				dvec_tmp[1]= -moffset[1];
+				dvec_tmp[2]= 0;
+
+				if (fly->use_precision) {
+					dvec_tmp[0] *= 0.1;
+					dvec_tmp[1] *= 0.1;
+				}
+
+				mul_m3_v3(mat, dvec_tmp);
+				mul_v3_fl(dvec_tmp, time_redraw*200.0 * fly->grid);
+
+			} else {
+				float roll; /* similar to the angle between the camera's up and the Z-up, but its very rough so just roll*/
+
+				/* rotate about the X axis- look up/down */
+				if (moffset[1]) {
+					upvec[0]=1;
+					upvec[1]=0;
+					upvec[2]=0;
+					mul_m3_v3(mat, upvec);
+					axis_angle_to_quat( tmp_quat, upvec, (float)moffset[1] * time_redraw * -FLY_ROTATE_FAC); /* Rotate about the relative up vec */
+					mul_qt_qtqt(rv3d->viewquat, rv3d->viewquat, tmp_quat);
+
+					if (fly->xlock) fly->xlock = 2; /*check for rotation*/
+					if (fly->zlock) fly->zlock = 2;
+					fly->xlock_momentum= 0.0f;
+				}
+
+				/* rotate about the Y axis- look left/right */
+				if (moffset[0]) {
+
+					/* if we're upside down invert the moffset */
+					upvec[0]=0;
+					upvec[1]=1;
+					upvec[2]=0;
+					mul_m3_v3(mat, upvec);
+
+					if(upvec[2] < 0.0f)
+						moffset[0]= -moffset[0];
+
+					/* make the lock vectors */
+					if (fly->zlock) {
+						upvec[0]=0;
+						upvec[1]=0;
+						upvec[2]=1;
+					} else {
+						upvec[0]=0;
+						upvec[1]=1;
+						upvec[2]=0;
+						mul_m3_v3(mat, upvec);
+					}
+
+					axis_angle_to_quat( tmp_quat, upvec, (float)moffset[0] * time_redraw * FLY_ROTATE_FAC); /* Rotate about the relative up vec */
+					mul_qt_qtqt(rv3d->viewquat, rv3d->viewquat, tmp_quat);
+
+					if (fly->xlock) fly->xlock = 2;/*check for rotation*/
+					if (fly->zlock) fly->zlock = 2;
+				}
+
+				if (fly->zlock==2) {
+					upvec[0]=1;
+					upvec[1]=0;
+					upvec[2]=0;
+					mul_m3_v3(mat, upvec);
+
+					/*make sure we have some z rolling*/
+					if (fabs(upvec[2]) > 0.00001f) {
+						roll= upvec[2]*5;
+						upvec[0]=0; /*rotate the view about this axis*/
+						upvec[1]=0;
+						upvec[2]=1;
+
+						mul_m3_v3(mat, upvec);
+						axis_angle_to_quat( tmp_quat, upvec, roll*time_redraw_clamped*fly->zlock_momentum * FLY_ZUP_CORRECT_FAC); /* Rotate about the relative up vec */
+						mul_qt_qtqt(rv3d->viewquat, rv3d->viewquat, tmp_quat);
+
+						fly->zlock_momentum += FLY_ZUP_CORRECT_ACCEL;
+					} else {
+						fly->zlock=1; /* dont check until the view rotates again */
+						fly->zlock_momentum= 0.0f;
+					}
+				}
+
+				if (fly->xlock==2 && moffset[1]==0) { /*only apply xcorrect when mouse isnt applying x rot*/
+					upvec[0]=0;
+					upvec[1]=0;
+					upvec[2]=1;
+					mul_m3_v3(mat, upvec);
+					/*make sure we have some z rolling*/
+					if (fabs(upvec[2]) > 0.00001) {
+						roll= upvec[2] * -5;
+
+						upvec[0]= 1.0f; /*rotate the view about this axis*/
+						upvec[1]= 0.0f;
+						upvec[2]= 0.0f;
+
+						mul_m3_v3(mat, upvec);
+
+						axis_angle_to_quat( tmp_quat, upvec, roll*time_redraw_clamped*fly->xlock_momentum*0.1f); /* Rotate about the relative up vec */
+						mul_qt_qtqt(rv3d->viewquat, rv3d->viewquat, tmp_quat);
+
+						fly->xlock_momentum += 0.05f;
+					} else {
+						fly->xlock=1; /* see above */
+						fly->xlock_momentum= 0.0f;
+					}
+				}
+
+
+				if (apply_rotation) {
+					/* Normal operation */
+					/* define dvec, view direction vector */
+					dvec_tmp[0]= dvec_tmp[1]= dvec_tmp[2]= 0.0f;
+					/* move along the current axis */
+					dvec_tmp[fly->axis]= 1.0f;
+
+					mul_m3_v3(mat, dvec_tmp);
+
+					mul_v3_fl(dvec_tmp, fly->speed * time_redraw * 0.25f);
+				}
+			}
+
+			/* impose a directional lag */
+			interp_v3_v3v3(dvec, dvec_tmp, fly->dvec_prev, (1.0f/(1.0f+(time_redraw*5.0f))));
+
+			if (rv3d->persp==RV3D_CAMOB) {
+				Object *lock_ob= fly->root_parent ? fly->root_parent : fly->v3d->camera;
+				if (lock_ob->protectflag & OB_LOCK_LOCX) dvec[0] = 0.0;
+				if (lock_ob->protectflag & OB_LOCK_LOCY) dvec[1] = 0.0;
+				if (lock_ob->protectflag & OB_LOCK_LOCZ) dvec[2] = 0.0;
+			}
+
+			add_v3_v3(rv3d->ofs, dvec);
+
+			/* todo, dynamic keys */
+#if 0
+			if (fly->zlock && fly->xlock)
+				ED_area_headerprint(fly->ar, "FlyKeys  Speed:(+/- | Wheel),  Upright Axis:X  on/Z on,   Slow:Shift,  Direction:WASDRF,  Ok:LMB,  Pan:MMB,  Cancel:RMB");
+			else if (fly->zlock)
+				ED_area_headerprint(fly->ar, "FlyKeys  Speed:(+/- | Wheel),  Upright Axis:X off/Z on,   Slow:Shift,  Direction:WASDRF,  Ok:LMB,  Pan:MMB,  Cancel:RMB");
+			else if (fly->xlock)
+				ED_area_headerprint(fly->ar, "FlyKeys  Speed:(+/- | Wheel),  Upright Axis:X  on/Z off,  Slow:Shift,  Direction:WASDRF,  Ok:LMB,  Pan:MMB,  Cancel:RMB");
+			else
+				ED_area_headerprint(fly->ar, "FlyKeys  Speed:(+/- | Wheel),  Upright Axis:X off/Z off,  Slow:Shift,  Direction:WASDRF,  Ok:LMB,  Pan:MMB,  Cancel:RMB");
+#endif
+
+			/* we are in camera view so apply the view ofs and quat to the view matrix and set the camera to the view */
+			if (rv3d->persp==RV3D_CAMOB) {
+				ID *id_key;
+				/* transform the parent or the camera? */
+				if(fly->root_parent) {
+					Object *ob_update;
+                    
+					float view_mat[4][4];
+					float prev_view_imat[4][4];
+					float diff_mat[4][4];
+					float parent_mat[4][4];
+
+					invert_m4_m4(prev_view_imat, prev_view_mat);
+					view3d_persp_mat4(rv3d, view_mat);
+					mul_m4_m4m4(diff_mat, prev_view_imat, view_mat);
+					mul_m4_m4m4(parent_mat, fly->root_parent->obmat, diff_mat);
+					object_apply_mat4(fly->root_parent, parent_mat);
+
+					// where_is_object(scene, fly->root_parent);
+
+					ob_update= v3d->camera->parent;
+					while(ob_update) {
+						DAG_id_flush_update(&ob_update->id, OB_RECALC_OB);
+						ob_update= ob_update->parent;
+					}
+
+					copy_m4_m4(prev_view_mat, view_mat);
+
+					id_key= &fly->root_parent->id;
+
+				}
+				else {
+					float view_mat[4][4];
+					view3d_persp_mat4(rv3d, view_mat);
+					object_apply_mat4(v3d->camera, view_mat);
+					id_key= &v3d->camera->id;
+				}
+
+				/* record the motion */
+				if (autokeyframe_cfra_can_key(scene, id_key)) {
+					ListBase dsources = {NULL, NULL};
+					
+					/* add datasource override for the camera object */
+					ANIM_relative_keyingset_add_source(&dsources, id_key, NULL, NULL); 
+					
+					/* insert keyframes 
+					 *	1) on the first frame
+					 *	2) on each subsequent frame
+					 *		TODO: need to check in future that frame changed before doing this 
+					 */
+					if (fly->xlock || fly->zlock || moffset[0] || moffset[1]) {
+						KeyingSet *ks= ANIM_builtin_keyingset_get_named(NULL, "Rotation");
+						ANIM_apply_keyingset(C, &dsources, NULL, ks, MODIFYKEY_MODE_INSERT, (float)CFRA);
+					}
+					if (fly->speed) {
+						KeyingSet *ks= ANIM_builtin_keyingset_get_named(NULL, "Location");
+						ANIM_apply_keyingset(C, &dsources, NULL, ks, MODIFYKEY_MODE_INSERT, (float)CFRA);
+					}
+					
+					/* free temp data */
+					BLI_freelistN(&dsources);
+				}
+			}
+		} else
+			/*were not redrawing but we need to update the time else the view will jump */
+			fly->time_lastdraw= PIL_check_seconds_timer();
+		/* end drawing */
+		copy_v3_v3(fly->dvec_prev, dvec);
+	}
+
+/* moved to flyEnd() */
+
+	return OPERATOR_FINISHED;
+}
+
+
+
+static int fly_invoke(bContext *C, wmOperator *op, wmEvent *event)
+{
+	RegionView3D *rv3d= CTX_wm_region_view3d(C);
+	FlyInfo *fly;
+
+	if(rv3d->viewlock)
+		return OPERATOR_CANCELLED;
+
+	fly= MEM_callocN(sizeof(FlyInfo), "FlyOperation");
+
+	op->customdata= fly;
+
+	if(initFlyInfo(C, fly, op, event)==FALSE) {
+		MEM_freeN(op->customdata);
+		return OPERATOR_CANCELLED;
+	}
+
+	flyEvent(fly, event);
+
+	WM_event_add_modal_handler(C, op);
+
+	return OPERATOR_RUNNING_MODAL;
+}
+
+static int fly_cancel(bContext *C, wmOperator *op)
+{
+	FlyInfo *fly = op->customdata;
+
+	fly->state = FLY_CANCEL;
+	flyEnd(C, fly);
+	op->customdata= NULL;
+
+	return OPERATOR_CANCELLED;
+}
+
+static int fly_modal(bContext *C, wmOperator *op, wmEvent *event)
+{
+	int exit_code;
+
+	FlyInfo *fly = op->customdata;
+
+	fly->redraw= 0;
+
+	flyEvent(fly, event);
+
+	if(event->type==TIMER && event->customdata == fly->timer)
+		flyApply(C, fly);
+
+	if(fly->redraw) {
+		ED_region_tag_redraw(CTX_wm_region(C));
+	}
+
+	exit_code = flyEnd(C, fly);
+
+	if(exit_code!=OPERATOR_RUNNING_MODAL)
+		ED_region_tag_redraw(CTX_wm_region(C));
+
+	return exit_code;
+}
+
+void VIEW3D_OT_fly(wmOperatorType *ot)
+{
+	/* identifiers */
+	ot->name= "Fly Navigation";
+	ot->description= "Interactively fly around the scene";
+	ot->idname= "VIEW3D_OT_fly";
+
+	/* api callbacks */
+	ot->invoke= fly_invoke;
+	ot->cancel= fly_cancel;
+	ot->modal= fly_modal;
+	ot->poll= ED_operator_view3d_active;
+
+	/* flags */
+	ot->flag= OPTYPE_BLOCKING;
+}