- /*
- * Copyright (C) 2023 Christopher J. Howard
- *
- * This file is part of Antkeeper source code.
- *
- * Antkeeper source code is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * Antkeeper source code is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with Antkeeper source code. If not, see <http://www.gnu.org/licenses/>.
- */
-
- #include <engine/scene/static-mesh.hpp>
- #include <engine/render/model.hpp>
- #include <engine/render/material.hpp>
- #include <engine/scene/camera.hpp>
-
- namespace scene {
-
- static_mesh::static_mesh(std::shared_ptr<render::model> model)
- {
- set_model(model);
- }
-
- void static_mesh::set_model(std::shared_ptr<render::model> model)
- {
- m_model = model;
-
- if (m_model)
- {
- m_operations.resize(m_model->get_groups().size());
- for (std::size_t i = 0; i < m_operations.size(); ++i)
- {
- const auto& group = m_model->get_groups()[i];
-
- auto& operation = m_operations[i];
- operation.vertex_array = m_model->get_vertex_array().get();
- operation.drawing_mode = group.drawing_mode;
- operation.start_index = group.start_index;
- operation.index_count = group.index_count;
- operation.material = group.material;
- }
- }
- else
- {
- m_operations.clear();
- }
-
- transformed();
- }
-
- void static_mesh::set_material(std::size_t index, std::shared_ptr<render::material> material)
- {
- if (material)
- {
- m_operations[index].material = material;
- }
- else
- {
- m_operations[index].material = m_model->get_groups()[index].material;
- }
- }
-
- void static_mesh::reset_materials()
- {
- for (std::size_t i = 0; i < m_operations.size(); ++i)
- {
- m_operations[i].material = m_model->get_groups()[i].material;
- }
- }
-
- void static_mesh::update_bounds()
- {
- if (m_model)
- {
- // Get model bounds
- const auto& model_bounds = m_model->get_bounds();
-
- // Naive algorithm: transform each corner of the model AABB
- m_bounds = {math::fvec3::infinity(), -math::fvec3::infinity()};
- for (std::size_t i = 0; i < 8; ++i)
- {
- m_bounds.extend(get_transform() * model_bounds.corner(i));
- }
- }
- else
- {
- m_bounds = {get_translation(), get_translation()};
- }
- }
-
- void static_mesh::transformed()
- {
- update_bounds();
-
- const math::fmat4 transform_matrix = get_transform().matrix();
- for (auto& operation: m_operations)
- {
- operation.transform = transform_matrix;
- }
- }
-
- void static_mesh::render(render::context& ctx) const
- {
- const float depth = ctx.camera->get_view_frustum().near().distance(get_translation());
- for (auto& operation: m_operations)
- {
- operation.depth = depth;
- operation.layer_mask = get_layer_mask();
- ctx.operations.push_back(&operation);
- }
- }
-
- } // namespace scene
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