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74 lines
2.0 KiB
74 lines
2.0 KiB
/* |
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* Copyright (C) 2022,2024 Riyyi |
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* |
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* SPDX-License-Identifier: MIT |
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*/ |
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#include <algorithm> // std::sort |
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#include <cstdint> // uint32_t |
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#include "entt/entity/fwd.hpp" // entt:entity |
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#include "glm/ext/matrix_transform.hpp" // glm::translate, glm::rotate, glm::scale, glm::radians |
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#include "ruc/format/log.h" |
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#include "inferno/component/transformcomponent.h" |
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#include "inferno/system/transformsystem.h" |
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namespace Inferno { |
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TransformSystem::TransformSystem(s) |
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{ |
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ruc::info("TransformSystem initialized"); |
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} |
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TransformSystem::~TransformSystem() |
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{ |
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} |
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void TransformSystem::update() |
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{ |
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auto view = m_registry->view<TransformComponent>(); |
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for (auto entity : m_hierarchy) { |
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auto& component = view.get<TransformComponent>(entity); |
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// Identity matrix |
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component.transform = glm::mat4(1.0f); |
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// Translate |
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component.transform = glm::translate(component.transform, component.translate); |
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// Rotate |
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component.transform = glm::rotate(component.transform, glm::radians(component.rotate.x), { 1.0, 0.0, 0.0 }); |
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component.transform = glm::rotate(component.transform, glm::radians(component.rotate.y), { 0.0, 1.0, 0.0 }); |
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component.transform = glm::rotate(component.transform, glm::radians(component.rotate.z), { 0.0, 0.0, 1.0 }); |
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// Scale |
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component.transform = glm::scale(component.transform, component.scale); |
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// Apply the parent transform to the child transform |
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if (component.parent != entt::null) { |
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auto& parent = view.get<TransformComponent>(component.parent); |
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component.transform = parent.transform * component.transform; |
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} |
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} |
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} |
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void TransformSystem::add(uint32_t entity) |
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{ |
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m_hierarchy.push_back(static_cast<entt::entity>(entity)); |
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} |
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void TransformSystem::sort() |
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{ |
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std::sort(m_hierarchy.begin(), m_hierarchy.end(), |
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[](entt::entity a, entt::entity b) { |
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return (a == entt::null && b == entt::null) ? false |
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: (a == entt::null) ? true |
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: (b == entt::null) ? false |
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: a < b; |
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}); |
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} |
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} // namespace Inferno
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