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/* SPDX-License-Identifier: GPL-2.0-or-later */
/** \file
* \ingroup overlay
*/
#pragma once
#include "DNA_space_types.h"
#include "ED_view3d.h"
#include "draw_cache.h"
#include "draw_pass.hh"
#include "overlay_private.hh"
#include "overlay_shader_shared.h"
namespace blender::draw::overlay {
class Grid {
private:
UniformBuffer<OVERLAY_GridData> data_;
bool enabled = false;
PassSimple grid_ps_ = {"grid_ps_"};
float3 grid_axes = float3(0.0f);
float3 zplane_axes = float3(0.0f);
OVERLAY_GridBits grid_flag_;
OVERLAY_GridBits zneg_flag_;
OVERLAY_GridBits zpos_flag_;
public:
void update_ubo()
{
float grid_steps[SI_GRID_STEPS_LEN] = {
0.001f, 0.01f, 0.1f, 1.0f, 10.0f, 100.0f, 1000.0f, 10000.0f};
float grid_steps_y[SI_GRID_STEPS_LEN] = {0.0f}; /* When zero, use value from grid_steps. */
data_.line_size = max_ff(0.0f, U.pixelsize - 1.0f) * 0.5f;
/* Default, nothing is drawn. */
grid_flag_ = zneg_flag_ = zpos_flag_ = OVERLAY_GridBits(0);
/* SPACE_VIEW3D */
Scene *scene = DRW_context_state_get()->scene;
View3D *v3d = DRW_context_state_get()->v3d;
RegionView3D *rv3d = DRW_context_state_get()->rv3d;
const bool show_axis_x = true; //(pd->v3d_gridflag & V3D_SHOW_X) != 0;
const bool show_axis_y = true; //(pd->v3d_gridflag & V3D_SHOW_Y) != 0;
const bool show_axis_z = true; //(pd->v3d_gridflag & V3D_SHOW_Z) != 0;
const bool show_floor = true; //(pd->v3d_gridflag & V3D_SHOW_FLOOR) != 0;
const bool show_ortho_grid = true; //(pd->v3d_gridflag & V3D_SHOW_ORTHO_GRID) != 0;
// if (pd->hide_overlays || !(pd->v3d_gridflag & (V3D_SHOW_X | V3D_SHOW_Y | V3D_SHOW_Z |
// V3D_SHOW_FLOOR | V3D_SHOW_ORTHO_GRID))) {
// return;
// }
float viewinv[4][4], wininv[4][4];
float viewmat[4][4], winmat[4][4];
DRW_view_winmat_get(nullptr, winmat, false);
DRW_view_winmat_get(nullptr, wininv, true);
DRW_view_viewmat_get(nullptr, viewmat, false);
DRW_view_viewmat_get(nullptr, viewinv, true);
/* If perspective view or non-axis aligned view. */
if (winmat[3][3] == 0.0f || rv3d->view == RV3D_VIEW_USER) {
if (show_axis_x) {
grid_flag_ |= PLANE_XY | SHOW_AXIS_X;
}
if (show_axis_y) {
grid_flag_ |= PLANE_XY | SHOW_AXIS_Y;
}
if (show_floor) {
grid_flag_ |= PLANE_XY | SHOW_GRID;
}
}
else {
if (show_ortho_grid && ELEM(rv3d->view, RV3D_VIEW_RIGHT, RV3D_VIEW_LEFT)) {
grid_flag_ = PLANE_YZ | SHOW_AXIS_Y | SHOW_AXIS_Z | SHOW_GRID | GRID_BACK;
}
else if (show_ortho_grid && ELEM(rv3d->view, RV3D_VIEW_TOP, RV3D_VIEW_BOTTOM)) {
grid_flag_ = PLANE_XY | SHOW_AXIS_X | SHOW_AXIS_Y | SHOW_GRID | GRID_BACK;
}
else if (show_ortho_grid && ELEM(rv3d->view, RV3D_VIEW_FRONT, RV3D_VIEW_BACK)) {
grid_flag_ = PLANE_XZ | SHOW_AXIS_X | SHOW_AXIS_Z | SHOW_GRID | GRID_BACK;
}
}
grid_axes[0] = float((grid_flag_ & (PLANE_XZ | PLANE_XY)) != 0);
grid_axes[1] = float((grid_flag_ & (PLANE_YZ | PLANE_XY)) != 0);
grid_axes[2] = float((grid_flag_ & (PLANE_YZ | PLANE_XZ)) != 0);
/* Z axis if needed */
if (((rv3d->view == RV3D_VIEW_USER) || (rv3d->persp != RV3D_ORTHO)) && show_axis_z) {
zpos_flag_ = SHOW_AXIS_Z;
float zvec[3], campos[3];
negate_v3_v3(zvec, viewinv[2]);
copy_v3_v3(campos, viewinv[3]);
/* z axis : chose the most facing plane */
if (fabsf(zvec[0]) < fabsf(zvec[1])) {
zpos_flag_ |= PLANE_XZ;
}
else {
zpos_flag_ |= PLANE_YZ;
}
zneg_flag_ = zpos_flag_;
/* Perspective: If camera is below floor plane, we switch clipping.
* Orthographic: If eye vector is looking up, we switch clipping. */
if (((winmat[3][3] == 0.0f) && (campos[2] > 0.0f)) ||
((winmat[3][3] != 0.0f) && (zvec[2] < 0.0f))) {
zpos_flag_ |= CLIP_ZPOS;
zneg_flag_ |= CLIP_ZNEG;
}
else {
zpos_flag_ |= CLIP_ZNEG;
zneg_flag_ |= CLIP_ZPOS;
}
zplane_axes[0] = float((zpos_flag_ & (PLANE_XZ | PLANE_XY)) != 0);
zplane_axes[1] = float((zpos_flag_ & (PLANE_YZ | PLANE_XY)) != 0);
zplane_axes[2] = float((zpos_flag_ & (PLANE_YZ | PLANE_XZ)) != 0);
}
else {
zneg_flag_ = zpos_flag_ = CLIP_ZNEG | CLIP_ZPOS;
}
float dist;
// if (rv3d->persp == RV3D_CAMOB && v3d->camera && v3d->camera->type == OB_CAMERA) {
// Object *camera_object = DEG_get_evaluated_object(draw_ctx->depsgraph, v3d->camera);
// dist = ((Camera *)(camera_object->data))->clip_end;
// grid_flag_ |= GRID_CAMERA;
// zneg_flag_ |= GRID_CAMERA;
// zpos_flag_ |= GRID_CAMERA;
// }
// else {
dist = v3d->clip_end;
// }
if (winmat[3][3] == 0.0f) {
copy_v3_fl(data_.size, dist);
}
else {
float viewdist = 1.0f / min_ff(fabsf(winmat[0][0]), fabsf(winmat[1][1]));
copy_v3_fl(data_.size, viewdist * dist);
}
data_.distance = dist / 2.0f;
ED_view3d_grid_steps(scene, v3d, rv3d, grid_steps);
if ((v3d->flag & (V3D_XR_SESSION_SURFACE | V3D_XR_SESSION_MIRROR)) != 0) {
/* The calculations for the grid parameters assume that the view matrix has no scale
* component, which may not be correct if the user is "shrunk" or "enlarged" by zooming in or
* out. Therefore, we need to compensate the values here. */
/* Assumption is uniform scaling (all column vectors are of same length). */
float viewinvscale = len_v3(viewinv[0]);
data_.distance *= viewinvscale;
}
/* Convert to UBO alignment. */
for (int i = 0; i < SI_GRID_STEPS_LEN; i++) {
data_.steps[i][0] = grid_steps[i];
data_.steps[i][1] = (grid_steps_y[i] != 0.0f) ? grid_steps_y[i] : grid_steps[i];
}
data_.push_update();
}
void begin_sync()
{
update_ubo();
grid_ps_.init();
grid_ps_.state_set(DRW_STATE_WRITE_COLOR | DRW_STATE_BLEND_ALPHA);
grid_ps_.shader_set(OVERLAY_shader_grid());
grid_ps_.bind_ubo("grid_buf", &data_);
grid_ps_.bind_ubo("globalsBlock", &G_draw.block_ubo);
grid_ps_.bind_texture("depth_tx", &DRW_viewport_texture_list_get()->depth);
grid_ps_.push_constant("grid_flag", grid_flag_);
grid_ps_.push_constant("plane_axes", grid_axes);
grid_ps_.clear_color(float4(0.0f, 0.0f, 0.0f, 0.0f));
grid_ps_.draw(DRW_cache_grid_get());
}
void draw(Manager &manager, View &view)
{
manager.submit(grid_ps_, view);
}
};
} // namespace blender::draw::overlay
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