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- /*
- * Copyright (C) 2021 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/>.
- */
-
- #ifndef ANTKEEPER_SCENE_BILLBOARD_HPP
- #define ANTKEEPER_SCENE_BILLBOARD_HPP
-
- #include "scene/object.hpp"
- #include "geometry/aabb.hpp"
- #include "utility/fundamental-types.hpp"
-
- class material;
-
- namespace scene {
-
- /// Enumerates billboard types.
- enum class billboard_type
- {
- // No alignment
- flat,
-
- // Aligns to face camera
- spherical,
-
- // Rotates about an alignment axis to face camera
- cylindrical
- };
-
- /**
- * A 2D unit quad with one material.
- */
- class billboard: public object<billboard>
- {
- public:
- billboard();
- billboard(const billboard& other);
- billboard& operator=(const billboard& other);
-
- void set_material(material* material);
-
- /// Sets the billboard alignment mode.
- void set_billboard_type(billboard_type type);
-
- /// Sets the axis around which the billboard will be rotated when the alignment is set to billboard_alignment::cylindrical.
- void set_alignment_axis(const float3& axis);
-
- virtual const bounding_volume<float>& get_bounds() const;
-
- material* get_material() const;
- billboard_type get_billboard_type() const;
- const float3& get_alignment_axis() const;
-
- virtual void update_tweens();
-
- private:
- static const aabb<float> untransformed_bounds;
-
- virtual void transformed();
-
-
- aabb<float> bounds;
- material* material;
- billboard_type type;
- float3 alignment_axis;
- };
-
- inline const bounding_volume<float>& billboard::get_bounds() const
- {
- return bounds;
- }
-
- inline material* billboard::get_material() const
- {
- return material;
- }
-
- inline billboard_type billboard::get_billboard_type() const
- {
- return type;
- }
-
- inline const float3& billboard::get_alignment_axis() const
- {
- return alignment_axis;
- }
-
- } // namespace scene
-
- #endif // ANTKEEPER_SCENE_BILLBOARD_HPP
-
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