diff options
Diffstat (limited to 'source/blender/io/gpencil/intern/gpencil_io_base.cc')
| -rw-r--r-- | source/blender/io/gpencil/intern/gpencil_io_base.cc | 396 |
1 files changed, 396 insertions, 0 deletions
diff --git a/source/blender/io/gpencil/intern/gpencil_io_base.cc b/source/blender/io/gpencil/intern/gpencil_io_base.cc new file mode 100644 index 00000000000..8da1ec27b9c --- /dev/null +++ b/source/blender/io/gpencil/intern/gpencil_io_base.cc @@ -0,0 +1,396 @@ + + +/* + * 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) 2020 Blender Foundation + * All rights reserved. + */ + +/** \file + * \ingroup bgpencil + */ + +#include "BLI_float2.hh" +#include "BLI_float3.hh" +#include "BLI_float4x4.hh" +#include "BLI_path_util.h" +#include "BLI_span.hh" + +#include "DNA_gpencil_types.h" +#include "DNA_layer_types.h" +#include "DNA_material_types.h" +#include "DNA_scene_types.h" +#include "DNA_screen_types.h" + +#include "BKE_camera.h" +#include "BKE_context.h" +#include "BKE_gpencil.h" +#include "BKE_gpencil_geom.h" +#include "BKE_main.h" +#include "BKE_material.h" + +#include "UI_view2d.h" + +#include "ED_view3d.h" + +#include "DEG_depsgraph.h" +#include "DEG_depsgraph_query.h" + +#include "gpencil_io_base.hh" + +using blender::Span; + +namespace blender::io::gpencil { + +/* Constructor. */ +GpencilIO::GpencilIO(const GpencilIOParams *iparams) +{ + params_ = *iparams; + + /* Easy access data. */ + bmain_ = CTX_data_main(params_.C); + depsgraph_ = CTX_data_depsgraph_pointer(params_.C); + scene_ = CTX_data_scene(params_.C); + rv3d_ = (RegionView3D *)params_.region->regiondata; + gpd_ = (params_.ob != nullptr) ? (bGPdata *)params_.ob->data : nullptr; + cfra_ = iparams->frame_cur; + + /* Calculate camera matrix. */ + Object *cam_ob = params_.v3d->camera; + if (cam_ob != nullptr) { + /* Set up parameters. */ + CameraParams params; + BKE_camera_params_init(¶ms); + BKE_camera_params_from_object(¶ms, cam_ob); + + /* Compute matrix, viewplane, .. */ + RenderData *rd = &scene_->r; + BKE_camera_params_compute_viewplane(¶ms, rd->xsch, rd->ysch, rd->xasp, rd->yasp); + BKE_camera_params_compute_matrix(¶ms); + + float viewmat[4][4]; + invert_m4_m4(viewmat, cam_ob->obmat); + + mul_m4_m4m4(persmat_, params.winmat, viewmat); + is_ortho_ = params.is_ortho; + } + else { + unit_m4(persmat_); + is_ortho_ = false; + } + + winx_ = params_.region->winx; + winy_ = params_.region->winy; + + /* Camera rectangle. */ + if (rv3d_->persp == RV3D_CAMOB) { + render_x_ = (scene_->r.xsch * scene_->r.size) / 100; + render_y_ = (scene_->r.ysch * scene_->r.size) / 100; + + ED_view3d_calc_camera_border(CTX_data_scene(params_.C), + depsgraph_, + params_.region, + params_.v3d, + rv3d_, + &camera_rect_, + true); + is_camera_ = true; + camera_ratio_ = render_x_ / (camera_rect_.xmax - camera_rect_.xmin); + offset_.x = camera_rect_.xmin; + offset_.y = camera_rect_.ymin; + } + else { + is_camera_ = false; + is_ortho_ = false; + /* Calc selected object boundbox. Need set initial value to some variables. */ + camera_ratio_ = 1.0f; + offset_.x = 0.0f; + offset_.y = 0.0f; + + selected_objects_boundbox_calc(); + rctf boundbox; + selected_objects_boundbox_get(&boundbox); + + render_x_ = boundbox.xmax - boundbox.xmin; + render_y_ = boundbox.ymax - boundbox.ymin; + offset_.x = boundbox.xmin; + offset_.y = boundbox.ymin; + } +} + +/** Create a list of selected objects sorted from back to front */ +void GpencilIO::create_object_list() +{ + ViewLayer *view_layer = CTX_data_view_layer(params_.C); + + float3 camera_z_axis; + copy_v3_v3(camera_z_axis, rv3d_->viewinv[2]); + ob_list_.clear(); + + LISTBASE_FOREACH (Base *, base, &view_layer->object_bases) { + Object *object = base->object; + + if (object->type != OB_GPENCIL) { + continue; + } + if ((params_.select_mode == GP_EXPORT_ACTIVE) && (params_.ob != object)) { + continue; + } + + if ((params_.select_mode == GP_EXPORT_SELECTED) && ((base->flag & BASE_SELECTED) == 0)) { + continue; + } + + /* Save z-depth from view to sort from back to front. */ + if (is_camera_) { + float camera_z = dot_v3v3(camera_z_axis, object->obmat[3]); + ObjectZ obz = {camera_z, object}; + ob_list_.append(obz); + } + else { + float zdepth = 0; + if (rv3d_) { + if (rv3d_->is_persp) { + zdepth = ED_view3d_calc_zfac(rv3d_, object->obmat[3], nullptr); + } + else { + zdepth = -dot_v3v3(rv3d_->viewinv[2], object->obmat[3]); + } + ObjectZ obz = {zdepth * -1.0f, object}; + ob_list_.append(obz); + } + } + } + /* Sort list of objects from point of view. */ + std::sort(ob_list_.begin(), ob_list_.end(), [](const ObjectZ &obz1, const ObjectZ &obz2) { + return obz1.zdepth < obz2.zdepth; + }); +} + +/** + * Set file input_text full path. + * \param filename: Path of the file provided by save dialog. + */ +void GpencilIO::filename_set(const char *filename) +{ + BLI_strncpy(filename_, filename, FILE_MAX); + BLI_path_abs(filename_, BKE_main_blendfile_path(bmain_)); +} + +/** Convert to screenspace. */ +bool GpencilIO::gpencil_3D_point_to_screen_space(const float3 co, float2 &r_co) +{ + float3 parent_co = diff_mat_ * co; + float2 screen_co; + eV3DProjTest test = (eV3DProjTest)(V3D_PROJ_RET_OK); + if (ED_view3d_project_float_global(params_.region, parent_co, screen_co, test) == + V3D_PROJ_RET_OK) { + if (!ELEM(V2D_IS_CLIPPED, screen_co[0], screen_co[1])) { + copy_v2_v2(r_co, screen_co); + /* Invert X axis. */ + if (invert_axis_[0]) { + r_co[0] = winx_ - r_co[0]; + } + /* Invert Y axis. */ + if (invert_axis_[1]) { + r_co[1] = winy_ - r_co[1]; + } + /* Apply offset and scale. */ + sub_v2_v2(r_co, &offset_.x); + mul_v2_fl(r_co, camera_ratio_); + + return true; + } + } + r_co[0] = V2D_IS_CLIPPED; + r_co[1] = V2D_IS_CLIPPED; + + /* Invert X axis. */ + if (invert_axis_[0]) { + r_co[0] = winx_ - r_co[0]; + } + /* Invert Y axis. */ + if (invert_axis_[1]) { + r_co[1] = winy_ - r_co[1]; + } + + return false; +} + +/** Convert to render space. */ +float2 GpencilIO::gpencil_3D_point_to_render_space(const float3 co, const bool is_ortho) +{ + float3 parent_co = diff_mat_ * co; + mul_m4_v3(persmat_, parent_co); + + if (!is_ortho) { + parent_co.x = parent_co.x / max_ff(FLT_MIN, parent_co.z); + parent_co.y = parent_co.y / max_ff(FLT_MIN, parent_co.z); + } + + float2 r_co; + r_co.x = (parent_co.x + 1.0f) / 2.0f * (float)render_x_; + r_co.y = (parent_co.y + 1.0f) / 2.0f * (float)render_y_; + + /* Invert X axis. */ + if (invert_axis_[0]) { + r_co.x = (float)render_x_ - r_co.x; + } + /* Invert Y axis. */ + if (invert_axis_[1]) { + r_co.y = (float)render_y_ - r_co.y; + } + + return r_co; +} + +/** Convert to 2D. */ +float2 GpencilIO::gpencil_3D_point_to_2D(const float3 co) +{ + const bool is_camera = (bool)(rv3d_->persp == RV3D_CAMOB); + if (is_camera) { + return gpencil_3D_point_to_render_space(co, is_orthographic()); + } + float2 result; + gpencil_3D_point_to_screen_space(co, result); + return result; +} + +/** Get radius of point. */ +float GpencilIO::stroke_point_radius_get(bGPDlayer *gpl, bGPDstroke *gps) +{ + bGPDspoint *pt = &gps->points[0]; + const float2 screen_co = gpencil_3D_point_to_2D(&pt->x); + + /* Radius. */ + bGPDstroke *gps_perimeter = BKE_gpencil_stroke_perimeter_from_view( + rv3d_, gpd_, gpl, gps, 3, diff_mat_.values); + + pt = &gps_perimeter->points[0]; + const float2 screen_ex = gpencil_3D_point_to_2D(&pt->x); + + const float2 v1 = screen_co - screen_ex; + float radius = v1.length(); + BKE_gpencil_free_stroke(gps_perimeter); + + return MAX2(radius, 1.0f); +} + +void GpencilIO::prepare_layer_export_matrix(Object *ob, bGPDlayer *gpl) +{ + BKE_gpencil_layer_transform_matrix_get(depsgraph_, ob, gpl, diff_mat_.values); + diff_mat_ = diff_mat_ * float4x4(gpl->layer_invmat); +} + +void GpencilIO::prepare_stroke_export_colors(Object *ob, bGPDstroke *gps) +{ + MaterialGPencilStyle *gp_style = BKE_gpencil_material_settings(ob, gps->mat_nr + 1); + + /* Stroke color. */ + copy_v4_v4(stroke_color_, gp_style->stroke_rgba); + avg_opacity_ = 0; + /* Get average vertex color and apply. */ + float avg_color[4] = {0.0f, 0.0f, 0.0f, 0.0f}; + for (const bGPDspoint &pt : Span(gps->points, gps->totpoints)) { + add_v4_v4(avg_color, pt.vert_color); + avg_opacity_ += pt.strength; + } + + mul_v4_v4fl(avg_color, avg_color, 1.0f / (float)gps->totpoints); + interp_v3_v3v3(stroke_color_, stroke_color_, avg_color, avg_color[3]); + avg_opacity_ /= (float)gps->totpoints; + + /* Fill color. */ + copy_v4_v4(fill_color_, gp_style->fill_rgba); + /* Apply vertex color for fill. */ + interp_v3_v3v3(fill_color_, fill_color_, gps->vert_color_fill, gps->vert_color_fill[3]); +} + +float GpencilIO::stroke_average_opacity_get() +{ + return avg_opacity_; +} + +bool GpencilIO::is_camera_mode() +{ + return is_camera_; +} + +bool GpencilIO::is_orthographic() +{ + return is_ortho_; +} + +/* Calculate selected strokes boundbox. */ +void GpencilIO::selected_objects_boundbox_calc() +{ + const float gap = 10.0f; + + float2 min, max; + INIT_MINMAX2(min, max); + + for (ObjectZ &obz : ob_list_) { + Object *ob = obz.ob; + /* Use evaluated version to get strokes with modifiers. */ + Object *ob_eval = (Object *)DEG_get_evaluated_id(depsgraph_, &ob->id); + bGPdata *gpd_eval = (bGPdata *)ob_eval->data; + + LISTBASE_FOREACH (bGPDlayer *, gpl, &gpd_eval->layers) { + if (gpl->flag & GP_LAYER_HIDE) { + continue; + } + BKE_gpencil_layer_transform_matrix_get(depsgraph_, ob_eval, gpl, diff_mat_.values); + + bGPDframe *gpf = gpl->actframe; + if (gpf == nullptr) { + continue; + } + + LISTBASE_FOREACH (bGPDstroke *, gps, &gpf->strokes) { + if (gps->totpoints == 0) { + continue; + } + for (const bGPDspoint &pt : MutableSpan(gps->points, gps->totpoints)) { + const float2 screen_co = gpencil_3D_point_to_2D(&pt.x); + minmax_v2v2_v2(min, max, screen_co); + } + } + } + } + /* Add small gap. */ + add_v2_fl(min, gap * -1.0f); + add_v2_fl(max, gap); + + select_boundbox_.xmin = min[0]; + select_boundbox_.ymin = min[1]; + select_boundbox_.xmax = max[0]; + select_boundbox_.ymax = max[1]; +} + +void GpencilIO::selected_objects_boundbox_get(rctf *boundbox) +{ + boundbox->xmin = select_boundbox_.xmin; + boundbox->xmax = select_boundbox_.xmax; + boundbox->ymin = select_boundbox_.ymin; + boundbox->ymax = select_boundbox_.ymax; +} + +void GpencilIO::frame_number_set(const int value) +{ + cfra_ = value; +} + +} // namespace blender::io::gpencil |