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/* SPDX-License-Identifier: GPL-2.0-or-later */
/** \file
* \ingroup spview3d
*/
#include "DNA_camera_types.h"
#include "MEM_guardedalloc.h"
#include "BLI_math.h"
#include "BLI_rect.h"
#include "BKE_context.h"
#include "BKE_report.h"
#include "DEG_depsgraph_query.h"
#include "WM_api.h"
#include "RNA_access.h"
#include "view3d_intern.h"
#include "view3d_navigate.h" /* own include */
/* -------------------------------------------------------------------- */
/** \name Border Zoom Operator
* \{ */
static int view3d_zoom_border_exec(bContext *C, wmOperator *op)
{
ARegion *region = CTX_wm_region(C);
View3D *v3d = CTX_wm_view3d(C);
RegionView3D *rv3d = CTX_wm_region_view3d(C);
const int smooth_viewtx = WM_operator_smooth_viewtx_get(op);
/* Zooms in on a border drawn by the user */
rcti rect;
float dvec[3], vb[2], xscale, yscale;
float dist_range[2];
/* SMOOTHVIEW */
float new_dist;
float new_ofs[3];
/* ZBuffer depth vars */
float depth_close = FLT_MAX;
float cent[2], p[3];
/* NOTE: otherwise opengl won't work. */
view3d_operator_needs_opengl(C);
/* get box select values using rna */
WM_operator_properties_border_to_rcti(op, &rect);
/* check if zooming in/out view */
const bool zoom_in = !RNA_boolean_get(op->ptr, "zoom_out");
ED_view3d_dist_range_get(v3d, dist_range);
ED_view3d_depth_override(
CTX_data_ensure_evaluated_depsgraph(C), region, v3d, NULL, V3D_DEPTH_NO_GPENCIL, NULL);
{
/* avoid allocating the whole depth buffer */
ViewDepths depth_temp = {0};
/* avoid view3d_update_depths() for speed. */
view3d_depths_rect_create(region, &rect, &depth_temp);
/* find the closest Z pixel */
depth_close = view3d_depth_near(&depth_temp);
MEM_SAFE_FREE(depth_temp.depths);
}
/* Resize border to the same ratio as the window. */
{
const float region_aspect = (float)region->winx / (float)region->winy;
if (((float)BLI_rcti_size_x(&rect) / (float)BLI_rcti_size_y(&rect)) < region_aspect) {
BLI_rcti_resize_x(&rect, (int)(BLI_rcti_size_y(&rect) * region_aspect));
}
else {
BLI_rcti_resize_y(&rect, (int)(BLI_rcti_size_x(&rect) / region_aspect));
}
}
cent[0] = (((float)rect.xmin) + ((float)rect.xmax)) / 2;
cent[1] = (((float)rect.ymin) + ((float)rect.ymax)) / 2;
if (rv3d->is_persp) {
float p_corner[3];
/* no depths to use, we can't do anything! */
if (depth_close == FLT_MAX) {
BKE_report(op->reports, RPT_ERROR, "Depth too large");
return OPERATOR_CANCELLED;
}
/* convert border to 3d coordinates */
if ((!ED_view3d_unproject_v3(region, cent[0], cent[1], depth_close, p)) ||
(!ED_view3d_unproject_v3(region, rect.xmin, rect.ymin, depth_close, p_corner))) {
return OPERATOR_CANCELLED;
}
sub_v3_v3v3(dvec, p, p_corner);
negate_v3_v3(new_ofs, p);
new_dist = len_v3(dvec);
/* Account for the lens, without this a narrow lens zooms in too close. */
new_dist *= (v3d->lens / DEFAULT_SENSOR_WIDTH);
/* ignore dist_range min */
dist_range[0] = v3d->clip_start * 1.5f;
}
else { /* orthographic */
/* find the current window width and height */
vb[0] = region->winx;
vb[1] = region->winy;
new_dist = rv3d->dist;
/* convert the drawn rectangle into 3d space */
if (depth_close != FLT_MAX &&
ED_view3d_unproject_v3(region, cent[0], cent[1], depth_close, p)) {
negate_v3_v3(new_ofs, p);
}
else {
float xy_delta[2];
float zfac;
/* We can't use the depth, fallback to the old way that doesn't set the center depth */
copy_v3_v3(new_ofs, rv3d->ofs);
{
float tvec[3];
negate_v3_v3(tvec, new_ofs);
zfac = ED_view3d_calc_zfac(rv3d, tvec);
}
xy_delta[0] = (rect.xmin + rect.xmax - vb[0]) / 2.0f;
xy_delta[1] = (rect.ymin + rect.ymax - vb[1]) / 2.0f;
ED_view3d_win_to_delta(region, xy_delta, zfac, dvec);
/* center the view to the center of the rectangle */
sub_v3_v3(new_ofs, dvec);
}
/* work out the ratios, so that everything selected fits when we zoom */
xscale = (BLI_rcti_size_x(&rect) / vb[0]);
yscale = (BLI_rcti_size_y(&rect) / vb[1]);
new_dist *= max_ff(xscale, yscale);
}
if (!zoom_in) {
sub_v3_v3v3(dvec, new_ofs, rv3d->ofs);
new_dist = rv3d->dist * (rv3d->dist / new_dist);
add_v3_v3v3(new_ofs, rv3d->ofs, dvec);
}
/* clamp after because we may have been zooming out */
CLAMP(new_dist, dist_range[0], dist_range[1]);
const bool is_camera_lock = ED_view3d_camera_lock_check(v3d, rv3d);
if (rv3d->persp == RV3D_CAMOB) {
Depsgraph *depsgraph = CTX_data_ensure_evaluated_depsgraph(C);
if (is_camera_lock) {
ED_view3d_camera_lock_init(depsgraph, v3d, rv3d);
}
else {
ED_view3d_persp_switch_from_camera(depsgraph, v3d, rv3d, RV3D_PERSP);
}
}
ED_view3d_smooth_view(C,
v3d,
region,
smooth_viewtx,
&(const V3D_SmoothParams){
.ofs = new_ofs,
.dist = &new_dist,
.undo_str = op->type->name,
});
if (RV3D_LOCK_FLAGS(rv3d) & RV3D_BOXVIEW) {
view3d_boxview_sync(CTX_wm_area(C), region);
}
return OPERATOR_FINISHED;
}
void VIEW3D_OT_zoom_border(wmOperatorType *ot)
{
/* identifiers */
ot->name = "Zoom to Border";
ot->description = "Zoom in the view to the nearest object contained in the border";
ot->idname = "VIEW3D_OT_zoom_border";
/* api callbacks */
ot->invoke = WM_gesture_box_invoke;
ot->exec = view3d_zoom_border_exec;
ot->modal = WM_gesture_box_modal;
ot->cancel = WM_gesture_box_cancel;
ot->poll = view3d_zoom_or_dolly_poll;
/* flags */
ot->flag = 0;
/* properties */
WM_operator_properties_gesture_box_zoom(ot);
}
/** \} */
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