clouds.h

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// Luanti
// SPDX-License-Identifier: LGPL-2.1-or-later
// Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
 
#pragma once
 
#include "irrlichttypes_bloated.h"
#include "constants.h"
#include "irr_ptr.h"
#include "skyparams.h"
#include <ISceneNode.h>
#include <SMaterial.h>
#include <CMeshBuffer.h>
 
class IShaderSource;
 
namespace scene
{
        class ISceneManager;
}
 
// Menu clouds
// The mainmenu and the loading screen use the same Clouds object so that the
// clouds don't jump when switching between the two.
class Clouds;
extern scene::ISceneManager *g_menucloudsmgr;
extern Clouds *g_menuclouds;
 
class Clouds : public scene::ISceneNode
{
public:
        Clouds(scene::ISceneManager* mgr, IShaderSource *ssrc,
                        s32 id,
                        u32 seed
        );
 
        ~Clouds();
 
        /*
                ISceneNode methods
        */
 
        virtual void OnRegisterSceneNode();
 
        virtual void render();
 
        virtual const aabb3f &getBoundingBox() const
        {
                return m_box;
        }
 
        virtual u32 getMaterialCount() const
        {
                return 1;
        }
 
        virtual video::SMaterial& getMaterial(u32 i)
        {
                return m_material;
        }
 
        /*
                Other stuff
        */
 
        void step(float dtime);
 
        void update(const v3f &camera_p, const video::SColorf &color);
 
        void updateCameraOffset(v3s16 camera_offset)
        {
                m_camera_offset = camera_offset;
                updateBox();
        }
 
        void readSettings();
 
        void setDensity(float density)
        {
                if (m_params.density == density)
                        return;
                m_params.density = density;
                invalidateMesh();
        }
 
        void setColorBright(video::SColor color_bright)
        {
                m_params.color_bright = color_bright;
        }
 
        void setColorAmbient(video::SColor color_ambient)
        {
                m_params.color_ambient = color_ambient;
        }
 
        void setColorShadow(video::SColor color_shadow)
        {
                if (m_params.color_shadow == color_shadow)
                        return;
                m_params.color_shadow = color_shadow;
                invalidateMesh();
        }
 
        void setHeight(float height)
        {
                if (m_params.height == height)
                        return;
                m_params.height = height;
                updateBox();
                invalidateMesh();
        }
 
        void setSpeed(v2f speed)
        {
                m_params.speed = speed;
        }
 
        void setThickness(float thickness)
        {
                if (m_params.thickness == thickness)
                        return;
                m_params.thickness = thickness;
                updateBox();
                invalidateMesh();
        }
 
        bool isCameraInsideCloud() const { return m_camera_inside_cloud; }
 
        const video::SColor getColor() const { return m_color.toSColor(); }
 
private:
        void updateBox()
        {
                float height_bs    = m_params.height    * BS;
                float thickness_bs = m_params.thickness * BS;
                float far_bs       = 1000000.0f         * BS;
                m_box = aabb3f(-far_bs, height_bs, -far_bs,
                        far_bs, height_bs + thickness_bs, far_bs);
                m_box.MinEdge -= v3f::from(m_camera_offset) * BS;
                m_box.MaxEdge -= v3f::from(m_camera_offset) * BS;
        }
 
        void updateMesh();
        void invalidateMesh()
        {
                m_mesh_valid = false;
        }
 
        bool gridFilled(int x, int y) const;
 
        // Are the clouds 3D?
        inline bool is3D() const {
                return m_enable_3d && m_params.thickness >= 0.01f;
        }
 
        video::SMaterial m_material;
        irr_ptr<scene::SMeshBuffer> m_meshbuffer;
        // Value of m_origin at the time the mesh was last updated
        v2f m_mesh_origin;
        // Value of center_of_drawing_in_noise_i at the time the mesh was last updated
        v2s16 m_last_noise_center;
        // Was the mesh ever generated?
        bool m_mesh_valid = false;
 
        aabb3f m_box{{0.0f, 0.0f, 0.0f}};
        v2f m_origin;
        u16 m_cloud_radius_i;
        u32 m_seed;
        v3f m_camera_pos;
 
        v3s16 m_camera_offset;
        bool m_camera_inside_cloud = false;
 
        bool m_enable_3d;
        video::SColorf m_color = video::SColorf(1.0f, 1.0f, 1.0f, 1.0f);
        CloudParams m_params;
};