axmol/core/3d/CCSkybox.h

/****************************************************************************
 Copyright (c) 2015-2016 Chukong Technologies Inc.
 Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.

 https://axis-project.github.io/

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 all copies or substantial portions of the Software.

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#ifndef __SKYBOX_H__
#define __SKYBOX_H__

#include "base/ccTypes.h"
#include "platform/CCPlatformMacros.h"
#include "renderer/CCCustomCommand.h"
#include "2d/CCNode.h"
#include "renderer/backend/ProgramState.h"

NS_AX_BEGIN

/**
 * @addtogroup _3d
 * @{
 */

class TextureCube;

/**
 * Sky box technology is usually used to simulate infinity sky, mountains and other phenomena.
 */
class AX_DLL Skybox : public Node
{
public:
    CREATE_FUNC(Skybox);

    /** create skybox from 6 textures.
     @param positive_x texture for the right side of the texture cube face.
     @param negative_x texture for the left side of the texture cube face.
     @param positive_y texture for the top side of the texture cube face
     @param negative_y texture for the bottom side of the texture cube face
     @param positive_z texture for the forward side of the texture cube face.
     @param negative_z texture for the rear side of the texture cube face.
     @return  A new skybox inited with given parameters.
     */
    static Skybox* create(std::string_view positive_x,
                          std::string_view negative_x,
                          std::string_view positive_y,
                          std::string_view negative_y,
                          std::string_view positive_z,
                          std::string_view negative_z);

    /**texture getter and setter*/
    void setTexture(TextureCube*);

    /** draw Skybox object */
    virtual void draw(Renderer* renderer, const Mat4& transform, uint32_t flags) override;

    /** reload sky box after GLESContext reconstructed.*/
    void reload();

    /**
     * Constructor.
     */
    Skybox();

    /**
     * Destructor.
     */
    virtual ~Skybox();

    /**
     * init Skybox.
     */
    virtual bool init() override;

    /**
     * initialize with texture path
     */
    bool init(std::string_view positive_x,
              std::string_view negative_x,
              std::string_view positive_y,
              std::string_view negative_y,
              std::string_view positive_z,
              std::string_view negative_z);

protected:
    /**
     * init internal buffers for Skybox.
     */
    void initBuffers();

    CustomCommand _customCommand;
    TextureCube* _texture;

private:
    AX_DISALLOW_COPY_AND_ASSIGN(Skybox);

    backend::UniformLocation _uniformColorLoc;
    backend::UniformLocation _uniformCameraRotLoc;
    backend::UniformLocation _uniformEnvLoc;

    void onBeforeDraw();
    void onAfterDraw();

    bool _rendererDepthTestEnabled;
    backend::CompareFunction _rendererDepthCmpFunc;
    backend::CullMode _rendererCullMode;
};

// end of 3d group
/// @}

NS_AX_END

#endif  // __SKYBOX_H__