diff options
Diffstat (limited to 'source/blender/editors/gpencil/gpencil_utils.c')
| -rw-r--r-- | source/blender/editors/gpencil/gpencil_utils.c | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/source/blender/editors/gpencil/gpencil_utils.c b/source/blender/editors/gpencil/gpencil_utils.c new file mode 100644 index 00000000000..4a913c3d2e5 --- /dev/null +++ b/source/blender/editors/gpencil/gpencil_utils.c @@ -0,0 +1,166 @@ +/* + * ***** 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) 2014, Blender Foundation + * + * Contributor(s): Joshua Leung + * + * ***** END GPL LICENSE BLOCK ***** + */ + +/** \file blender/editors/gpencil/gpencil_utils.c + * \ingroup edgpencil + */ + +#include <stdio.h> +#include <string.h> +#include <stdlib.h> +#include <stddef.h> +#include <math.h> + +#include "MEM_guardedalloc.h" + +#include "BLI_math.h" +#include "BLI_blenlib.h" +#include "BLI_utildefines.h" + +#include "DNA_gpencil_types.h" +#include "DNA_object_types.h" +#include "DNA_scene_types.h" +#include "DNA_screen_types.h" +#include "DNA_space_types.h" +#include "DNA_view3d_types.h" + +#include "BKE_context.h" +#include "BKE_global.h" +#include "BKE_gpencil.h" +#include "BKE_library.h" +#include "BKE_object.h" +#include "BKE_report.h" +#include "BKE_scene.h" +#include "BKE_screen.h" + +#include "UI_interface.h" + +#include "WM_api.h" +#include "WM_types.h" + +#include "RNA_access.h" +#include "RNA_define.h" + +#include "UI_view2d.h" + +#include "ED_gpencil.h" +#include "ED_view3d.h" + +#include "gpencil_intern.h" + +/* ******************************************************** */ + +/* Check if part of stroke occurs within last segment drawn by eraser */ +bool gp_stroke_inside_circle(const int mval[2], const int UNUSED(mvalo[2]), + int rad, int x0, int y0, int x1, int y1) +{ + /* simple within-radius check for now */ + const float mval_fl[2] = {mval[0], mval[1]}; + const float screen_co_a[2] = {x0, y0}; + const float screen_co_b[2] = {x1, y1}; + + if (edge_inside_circle(mval_fl, rad, screen_co_a, screen_co_b)) { + return true; + } + + /* not inside */ + return false; +} + +/* ******************************************************** */ + +/* Init handling for space-conversion function (from passed-in parameters) */ +void gp_point_conversion_init(bContext *C, GP_SpaceConversion *r_gsc) +{ + ScrArea *sa = CTX_wm_area(C); + ARegion *ar = CTX_wm_region(C); + + /* zero out the storage (just in case) */ + memset(r_gsc, 0, sizeof(GP_SpaceConversion)); + unit_m4(r_gsc->mat); + + /* store settings */ + r_gsc->sa = sa; + r_gsc->ar = ar; + r_gsc->v2d = &ar->v2d; + + /* init region-specific stuff */ + if (sa->spacetype == SPACE_VIEW3D) { + wmWindow *win = CTX_wm_window(C); + Scene *scene = CTX_data_scene(C); + View3D *v3d = (View3D *)CTX_wm_space_data(C); + RegionView3D *rv3d = ar->regiondata; + + /* init 3d depth buffers */ + view3d_operator_needs_opengl(C); + + view3d_region_operator_needs_opengl(win, ar); + ED_view3d_autodist_init(scene, ar, v3d, 0); + + /* for camera view set the subrect */ + if (rv3d->persp == RV3D_CAMOB) { + ED_view3d_calc_camera_border(scene, ar, v3d, rv3d, &r_gsc->subrect_data, true); /* no shift */ + r_gsc->subrect = &r_gsc->subrect_data; + } + } +} + + +/* Convert Grease Pencil points to screen-space values */ +void gp_point_to_xy(GP_SpaceConversion *gsc, bGPDstroke *gps, bGPDspoint *pt, + int *r_x, int *r_y) +{ + ARegion *ar = gsc->ar; + View2D *v2d = gsc->v2d; + rctf *subrect = gsc->subrect; + int xyval[2]; + + if (gps->flag & GP_STROKE_3DSPACE) { + if (ED_view3d_project_int_global(ar, &pt->x, xyval, V3D_PROJ_TEST_NOP) == V3D_PROJ_RET_OK) { + *r_x = xyval[0]; + *r_y = xyval[1]; + } + else { + *r_x = V2D_IS_CLIPPED; + *r_y = V2D_IS_CLIPPED; + } + } + else if (gps->flag & GP_STROKE_2DSPACE) { + float vec[3] = {pt->x, pt->y, 0.0f}; + mul_m4_v3(gsc->mat, vec); + UI_view2d_view_to_region_clip(v2d, vec[0], vec[1], r_x, r_y); + } + else { + if (subrect == NULL) { /* normal 3D view */ + *r_x = (int)(pt->x / 100 * ar->winx); + *r_y = (int)(pt->y / 100 * ar->winy); + } + else { /* camera view, use subrect */ + *r_x = (int)((pt->x / 100) * BLI_rctf_size_x(subrect)) + subrect->xmin; + *r_y = (int)((pt->y / 100) * BLI_rctf_size_y(subrect)) + subrect->ymin; + } + } +} + +/* ******************************************************** */ |