rivers.hpp

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// Eng3D - General purpouse game engine
// Copyright (C) 2021, Eng3D contributors
//
// This program 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.
//
// This program 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 this program.  If not, see <https://www.gnu.org/licenses/>.
//
// ----------------------------------------------------------------------------
// Name:
//      rivers.hpp
//
// Abstract:
//      Does some important stuff.
// ----------------------------------------------------------------------------
 
#pragma once
 
#include <memory>
#include <vector>
#include "eng3d/curve.hpp"
 
namespace Eng3D {
    class Texture;
    class Camera;
    namespace OpenGL {
        class Program;
    }
    class State;
 
    class Rivers {
        Eng3D::State& s;
    public:
        Rivers(Eng3D::State& s, bool lazy_init = true);
        ~Rivers() = default;
 
        void draw(const Eng3D::Camera& camera);
    private:
        void get_river(std::vector<glm::vec3>& river, int current_index, int prev_index, uint32_t* pixels, int width, int height);
        void build_rivers();
        std::vector<std::unique_ptr<Eng3D::Curve>> curves;
        std::unique_ptr<Eng3D::OpenGL::Program> line_shader;
        std::shared_ptr<Eng3D::Texture> water_tex;
    };
}