sprite.h

/* *   Copyright (c) 2011-2017 Luke Benstead https://simulant-engine.appspot.com
 *
 *     This file is part of Simulant.
 *
 *     Simulant is free software: you can redistribute it and/or modify
 *     it under the terms of the GNU Lesser General Public License as published by
 *     the Free Software Foundation, either version 3 of the License, or
 *     (at your option) any later version.
 *
 *     Simulant 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 Lesser General Public License for more details.
 *
 *     You should have received a copy of the GNU Lesser General Public License
 *     along with Simulant.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef SPRITE_H
#define SPRITE_H
 
#include "stage_node.h"
 
#include "../types.h"
#include "../interfaces.h"
#include "../generic/managed.h"
#include "../generic/identifiable.h"
#include "../sound.h"
#include "../animation.h"
#include "../macros.h"
 
namespace smlt {
 
class KeyFrameAnimationState;
class SpriteManager;
 
struct SpritesheetAttrs {
    uint32_t margin = 0;
    uint32_t spacing = 0;
    uint32_t padding_vertical = 0;
    uint32_t padding_horizontal = 0;
};
 
class Sprite :
    public TypedDestroyableObject<Sprite, SpriteManager>,
    public ContainerNode,
    public generic::Identifiable<SpriteID>,
    public KeyFrameAnimated,
    public AudioSource,
    public ChainNameable<Sprite> {
 
public:
    using ContainerNode::_get_renderables;
 
    bool init() override;
    void clean_up() override;
    void update(float dt) override;
 
    void destroy() override;
    void destroy_immediately() override;
 
    Sprite(SpriteManager *manager, SoundDriver *sound_driver);
 
    void set_render_dimensions(float width, float height);
    void set_render_dimensions_from_width(float width);
    void set_render_dimensions_from_height(float height);
 
    void set_render_priority(smlt::RenderPriority priority);
 
    void set_alpha(float alpha);
 
    float alpha() const { return alpha_; }
    MaterialID material_id() const { return material_id_; }
 
    void set_spritesheet(
        TextureID texture_id,
        uint32_t frame_width,
        uint32_t frame_height,
        SpritesheetAttrs attrs=SpritesheetAttrs()
    );
 
    void flip_vertically(bool value=true);
    void flip_horizontally(bool value=true);
 
    const AABB& aabb() const override;
private:
    SpriteManager* manager_;
 
    float frame_width_ = 0;
    float frame_height_ = 0;
    float sprite_sheet_margin_ = 0;
    float sprite_sheet_spacing_ = 0;
    std::pair<uint32_t, uint32_t> sprite_sheet_padding_;
    float render_width_ = 1.0;
    float render_height_ = 1.0;
 
    ActorPtr actor_ = nullptr;
    ActorID actor_id_;
 
    MeshID mesh_id_;
    MaterialID material_id_;
 
    float image_width_ = 0;
    float image_height_ = 0;
 
    float alpha_ = 1.0f;
 
    void update_texture_coordinates();
 
    bool flipped_vertically_ = false;
    bool flipped_horizontally_ = false;
 
    void refresh_animation_state(uint32_t current_frame, uint32_t next_frame, float interp) {
        _S_UNUSED(current_frame);
        _S_UNUSED(next_frame);
        _S_UNUSED(interp);
 
        update_texture_coordinates();
    }
 
    std::shared_ptr<KeyFrameAnimationState> animation_state_;
 
public:
    Property<ActorPtr Sprite::*> actor = {this, &Sprite::actor_};
    Property<decltype(&Sprite::animation_state_)> animations = {this, &Sprite::animation_state_};
};
 
}
#endif // SPRITE_H