119 lines
3.5 KiB
C++
119 lines
3.5 KiB
C++
/*
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* <Short Description>
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* Copyright (C) 2023 Brett Terpstra
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef BLT_WITH_GRAPHICS_STATE_H
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#define BLT_WITH_GRAPHICS_STATE_H
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#include <blt/gfx/shader.h>
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#include <blt/math/vectors.h>
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#include <blt/math/matrix.h>
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namespace blt::gfx
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{
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/**
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* layout (std140) uniform GlobalMatrices
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* {
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* mat4 perspective; // full 3d perspective matrix
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* mat4 ortho; // full 2d orthographic matrix
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* mat4 view; // view matrix
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* mat4 pvm; // perspective view matrix
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* mat4 ovm; // ortho view matrix
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* };
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*/
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class matrix_state_manager
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{
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private:
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blt::mat4x4 perspective;
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blt::mat4x4 ortho;
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blt::mat4x4 view;
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blt::mat4x4 pvm;
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blt::mat4x4 ovm;
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blt::mat4x4 view_2d;
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blt::vec3 scale_2d;
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std::int32_t last_width = 0, last_height = 0;
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uniform_buffer* global_matrix_ubo = nullptr;
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public:
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[[nodiscard]] inline const blt::mat4x4& computedPVM() const
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{
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return pvm;
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}
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[[nodiscard]] inline const blt::mat4x4& computedOVM() const
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{
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return ovm;
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}
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void create_internals()
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{
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global_matrix_ubo = new uniform_buffer(sizeof(blt::mat4x4) * 5);
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}
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void cleanup()
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{
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delete global_matrix_ubo;
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}
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template<typename U>
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void setView(U&& mat)
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{
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view = (mat);
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}
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template<typename U, typename G>
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void setView2D(U&& mat, G&& scale)
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{
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view_2d = (mat);
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scale_2d = (scale);
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}
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template<typename U>
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void setPerspective(U&& mat)
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{
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perspective = (mat);
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}
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template<typename U>
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void setOrtho(U&& mat)
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{
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ortho = (mat);
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}
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void update_perspectives(std::int32_t width, std::int32_t height, float fov = 90, float near = 0.1f, float far = 500.0f,
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float ortho_near = 0, float ortho_far = 1.1);
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void update();
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const mat4x4& getView() const;
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const mat4x4& getOrtho() const;
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const mat4x4& getPerspective() const;
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const mat4x4& getPvm() const;
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const mat4x4& getOvm() const;
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const mat4x4& getView2D() const;
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const vec3& getScale2D() const;
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};
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}
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#endif //BLT_WITH_GRAPHICS_STATE_H
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