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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2022 Blender Foundation. */
#pragma once
/** \file
* \ingroup draw
*/
#include "DRW_gpu_wrapper.hh"
#include "DRW_render.h"
#include "draw_shader_shared.h"
namespace blender::draw {
class Manager;
/* TODO: de-duplicate. */
using ObjectBoundsBuf = StorageArrayBuffer<ObjectBounds, 128>;
/** \note Using uint4 for declaration but bound as uint. */
using VisibilityBuf = StorageArrayBuffer<uint4, 1, true>;
class View {
friend Manager;
private:
UniformBuffer<ViewMatrices> data_;
UniformBuffer<ViewCullingData> culling_;
/** Frozen version of data_ used for debugging culling. */
UniformBuffer<ViewMatrices> data_freeze_;
UniformBuffer<ViewCullingData> culling_freeze_;
/** Result of the visibility computation. 1 bit per resource ID. */
VisibilityBuf visibility_buf_;
const char *debug_name_;
bool is_inverted_ = false;
bool do_visibility_ = true;
bool dirty_ = true;
bool frozen_ = false;
public:
View(const char *name) : visibility_buf_(name), debug_name_(name){};
/* For compatibility with old system. Will be removed at some point. */
View(const char *name, const DRWView *view) : visibility_buf_(name), debug_name_(name)
{
float4x4 view_mat, win_mat;
DRW_view_viewmat_get(view, view_mat.ptr(), false);
DRW_view_winmat_get(view, win_mat.ptr(), false);
this->sync(view_mat, win_mat);
}
void sync(const float4x4 &view_mat, const float4x4 &win_mat);
bool is_persp() const
{
return data_.winmat[3][3] == 0.0f;
}
bool is_inverted() const
{
return is_inverted_;
}
float far_clip() const
{
if (is_persp()) {
return -data_.winmat[3][2] / (data_.winmat[2][2] + 1.0f);
}
return -(data_.winmat[3][2] - 1.0f) / data_.winmat[2][2];
}
float near_clip() const
{
if (is_persp()) {
return -data_.winmat[3][2] / (data_.winmat[2][2] - 1.0f);
}
return -(data_.winmat[3][2] + 1.0f) / data_.winmat[2][2];
}
const float4x4 &viewmat() const
{
return data_.viewmat;
}
const float4x4 &viewinv() const
{
return data_.viewinv;
}
const float4x4 &winmat() const
{
return data_.winmat;
}
const float4x4 &wininv() const
{
return data_.wininv;
}
private:
/** Called from draw manager. */
void bind();
void compute_visibility(ObjectBoundsBuf &bounds, uint resource_len, bool debug_freeze);
void update_viewport_size();
void frustum_boundbox_calc(BoundBox &bbox);
void frustum_culling_planes_calc();
void frustum_culling_sphere_calc(const BoundBox &bbox, BoundSphere &bsphere);
};
} // namespace blender::draw
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