Differential D15817 Diff 55261 source/blender/draw/intern/draw_view.hh

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source/blender/draw/intern/draw_view.hh

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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 deduplicate. */
				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<ViewInfos> data_;
				/** Freezed version of data_ used for debugging culling. */
				UniformBuffer<ViewInfos> data_freeze_;
				/** Result of the visibility computation. 1 bit per resource ID. */
				VisibilityBuf visibility_buf_;

				const char *debug_name_;

				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 set_clip_planes(Span<float4> planes);

				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 data_.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];
				}

				private:
				/** Called from draw manager. */
				void bind();
				void compute_visibility(ObjectBoundsBuf &bounds, uint resource_len, bool debug_freeze);

				void update_view_vectors();
				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