Camera tracking integration

===========================

Commiting camera tracking integration gsoc project into trunk.

This commit includes:

- Bundled version of libmv library (with some changes against official repo,
  re-sync with libmv repo a bit later)
- New datatype ID called MovieClip which is optimized to work with movie
  clips (both of movie files and image sequences) and doing camera/motion
  tracking operations.
- New editor called Clip Editor which is currently used for motion/tracking
  stuff only, but which can be easily extended to work with masks too.

  This editor supports:
  * Loading movie files/image sequences
  * Build proxies with different size for loaded movie clip, also supports
    building undistorted proxies to increase speed of playback in
    undistorted mode.
  * Manual lens distortion mode calibration using grid and grease pencil
  * Supervised 2D tracking using two different algorithms KLT and SAD.
  * Basic algorithm for feature detection
  * Camera motion solving. scene orientation

- New constraints to "link" scene objects with solved motions from clip:

  * Follow Track (make object follow 2D motion of track with given name
    or parent object to reconstructed 3D position of track)
  * Camera Solver to make camera moving in the same way as reconstructed camera

This commit NOT includes changes from tomato branch:

- New nodes (they'll be commited as separated patch)
- Automatic image offset guessing for image input node and image editor
  (need to do more tests and gather more feedback)
- Code cleanup in libmv-capi. It's not so critical cleanup, just increasing
  readability and understanadability of code. Better to make this chaneg when
  Keir will finish his current patch.

More details about this project can be found on this page:
    http://wiki.blender.org/index.php/User:Nazg-gul/GSoC-2011

Further development of small features would be done in trunk, bigger/experimental
features would first be implemented in tomato branch.

1 files changed, 255 insertions, 0 deletions

diff --git a/source/blender/editors/space_clip/clip_graph_draw.c b/source/blender/editors/space_clip/clip_graph_draw.c
new file mode 100644
index 00000000000..7b14783d4ca
--- /dev/null
+++ b/source/blender/editors/space_clip/clip_graph_draw.c
@@ -0,0 +1,255 @@
+/*
+ * ***** 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.
+ *
+ * The Original Code is Copyright (C) 2011 Blender Foundation.
+ * All rights reserved.
+ *
+ *
+ * Contributor(s): Blender Foundation,
+ *                 Sergey Sharybin
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+/** \file blender/editors/space_clip/clip_graph_draw.c
+ *  \ingroup spclip
+ */
+
+#include "DNA_movieclip_types.h"
+#include "DNA_scene_types.h"
+#include "DNA_object_types.h"	/* SELECT */
+
+#include "MEM_guardedalloc.h"
+
+#include "BKE_context.h"
+#include "BKE_movieclip.h"
+#include "BKE_tracking.h"
+
+#include "BLI_utildefines.h"
+#include "BLI_math.h"
+#include "BLI_string.h"
+
+#include "ED_screen.h"
+#include "ED_clip.h"
+
+#include "BIF_gl.h"
+
+#include "WM_types.h"
+
+#include "UI_interface.h"
+#include "UI_resources.h"
+#include "UI_view2d.h"
+
+#include "BLF_api.h"
+
+#include "clip_intern.h"	// own include
+
+static void draw_curve_knot(float x, float y, float xscale, float yscale, float hsize)
+{
+	static GLuint displist=0;
+
+	/* initialise round circle shape */
+	if (displist == 0) {
+		GLUquadricObj *qobj;
+
+		displist= glGenLists(1);
+		glNewList(displist, GL_COMPILE);
+
+		qobj= gluNewQuadric();
+		gluQuadricDrawStyle(qobj, GLU_SILHOUETTE);
+		gluDisk(qobj, 0,  0.7, 8, 1);
+		gluDeleteQuadric(qobj);
+
+		glEndList();
+	}
+
+	glPushMatrix();
+
+	glTranslatef(x, y, 0.0f);
+	glScalef(1.0f/xscale*hsize, 1.0f/yscale*hsize, 1.0f);
+	glCallList(displist);
+
+	glPopMatrix();
+}
+
+static void draw_graph_cfra(SpaceClip *sc, ARegion *ar, Scene *scene)
+{
+	View2D *v2d= &ar->v2d;
+	float xscale, yscale;
+	float vec[2];
+
+	/* Draw a light green line to indicate current frame */
+	vec[0]= (float)(sc->user.framenr * scene->r.framelen);
+
+	UI_ThemeColor(TH_CFRAME);
+	glLineWidth(2.0);
+
+	glBegin(GL_LINE_STRIP);
+		vec[1]= v2d->cur.ymin;
+		glVertex2fv(vec);
+
+		vec[1]= v2d->cur.ymax;
+		glVertex2fv(vec);
+	glEnd();
+
+	glLineWidth(1.0);
+
+	UI_view2d_view_orthoSpecial(ar, v2d, 1);
+
+	/* because the frame number text is subject to the same scaling as the contents of the view */
+	UI_view2d_getscale(v2d, &xscale, &yscale);
+	glScalef(1.0f/xscale, 1.0f, 1.0f);
+
+	clip_draw_curfra_label(sc, (float)sc->user.framenr * xscale, 18);
+
+	/* restore view transform */
+	glScalef(xscale, 1.0, 1.0);
+}
+
+static void tracking_segment_point_cb(void *UNUSED(userdata), MovieTrackingTrack *UNUSED(track),
+			MovieTrackingMarker *marker, int UNUSED(coord), float val)
+{
+	glVertex2f(marker->framenr, val);
+}
+
+void tracking_segment_start_cb(void *userdata, MovieTrackingTrack *track, int coord)
+{
+	static float colors[2][3] = {{1.0f, 0.0f, 0.0f},
+	                             {0.0f, 1.0f, 0.0f}};
+	float col[4];
+
+	copy_v3_v3(col, colors[coord]);
+
+	if(track==userdata) {
+		col[3]= 1.0f;
+		glLineWidth(2.0f);
+	} else {
+		col[3]= 0.5f;
+		glLineWidth(1.0f);
+	}
+
+	glColor4fv(col);
+
+	glBegin(GL_LINE_STRIP);
+}
+
+void tracking_segment_end_cb(void *UNUSED(userdata))
+{
+	glEnd();
+
+	glLineWidth(1.0f);
+}
+
+static void tracking_segment_knot_cb(void *userdata, MovieTrackingTrack *track,
+			MovieTrackingMarker *marker, int UNUSED(coord), float val)
+{
+	struct { MovieTrackingTrack *act_track; int sel; float xscale, yscale, hsize; } *data = userdata;
+	int sel= 0;
+
+	if(track!=data->act_track)
+		return;
+
+	sel= (marker->flag&MARKER_GRAPH_SEL) ? 1 : 0;
+
+	if(sel == data->sel) {
+		if(sel) UI_ThemeColor(TH_HANDLE_VERTEX_SELECT);
+		else UI_ThemeColor(TH_HANDLE_VERTEX);
+
+		draw_curve_knot(marker->framenr, val, data->xscale, data->yscale, data->hsize);
+	}
+}
+
+static void draw_tracks_curves(View2D *v2d, SpaceClip *sc)
+{
+	MovieClip *clip= ED_space_clip(sc);
+	MovieTracking *tracking= &clip->tracking;
+	int width, height;
+	struct { MovieTrackingTrack *act_track; int sel; float xscale, yscale, hsize; } userdata;
+
+	BKE_movieclip_get_size(clip, &sc->user, &width, &height);
+
+	if(!width || !height)
+		return;
+
+	/* non-selected knot handles */
+	userdata.hsize= UI_GetThemeValuef(TH_HANDLE_VERTEX_SIZE);
+	userdata.sel= 0;
+	userdata.act_track= clip->tracking.act_track;
+	UI_view2d_getscale(v2d, &userdata.xscale, &userdata.yscale);
+	clip_graph_tracking_values_iterate(sc, &userdata, tracking_segment_knot_cb, NULL, NULL);
+
+	/* draw graph lines */
+	glEnable(GL_BLEND);
+	clip_graph_tracking_values_iterate(sc, tracking->act_track, tracking_segment_point_cb, tracking_segment_start_cb, tracking_segment_end_cb);
+	glDisable(GL_BLEND);
+
+	/* selected knot handles on top of curves */
+	userdata.sel= 1;
+	clip_graph_tracking_values_iterate(sc, &userdata, tracking_segment_knot_cb, NULL, NULL);
+}
+
+static void draw_frame_curves(SpaceClip *sc)
+{
+	MovieClip *clip= ED_space_clip(sc);
+	MovieTracking *tracking= &clip->tracking;
+	MovieTrackingReconstruction *reconstruction= &tracking->reconstruction;
+	int i, lines= 0, prevfra= 0;
+
+	glColor3f(0.0f, 0.0f, 1.0f);
+
+	for(i= 0; i<reconstruction->camnr; i++) {
+		MovieReconstructedCamera *camera= &reconstruction->cameras[i];
+
+		if(lines && camera->framenr!=prevfra+1) {
+			glEnd();
+			lines= 0;
+		}
+
+		if(!lines) {
+			glBegin(GL_LINE_STRIP);
+			lines= 1;
+		}
+
+		glVertex2f(camera->framenr, camera->error);
+
+		prevfra= camera->framenr;
+	}
+
+	if(lines)
+		glEnd();
+}
+
+void clip_draw_graph(SpaceClip *sc, ARegion *ar, Scene *scene)
+{
+	View2D *v2d= &ar->v2d;
+	View2DGrid *grid;
+	short unitx= V2D_UNIT_FRAMESCALE, unity= V2D_UNIT_VALUES;
+
+	/* grid */
+	grid= UI_view2d_grid_calc(scene, v2d, unitx, V2D_GRID_NOCLAMP, unity, V2D_GRID_NOCLAMP, ar->winx, ar->winy);
+	UI_view2d_grid_draw(v2d, grid, V2D_GRIDLINES_ALL);
+	UI_view2d_grid_free(grid);
+
+	if(sc->flag&SC_SHOW_GRAPH_TRACKS)
+		draw_tracks_curves(v2d, sc);
+
+	if(sc->flag&SC_SHOW_GRAPH_FRAMES)
+		draw_frame_curves(sc);
+
+	/* current frame */
+	draw_graph_cfra(sc, ar, scene);
+}