axmol/tests/cpp-tests/Classes/Sprite3DTest/DrawNode3D.h

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 Copyright (c) 2014-2016 Chukong Technologies Inc.
 Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.

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#ifndef __DRAW_NODE_3D_H__
#define __DRAW_NODE_3D_H__

#include "cocos2d.h"

NS_CC_BEGIN

/**
 * Copy DrawNode for 3D geometry drawing.
 */
class DrawNode3D : public cocos2d::Node
{
public:
    /** creates and initialize a DrawNode3D node */
    static cocos2d::DrawNode3D* create();

    /**
     * Draw 3D Line
     */
    void drawLine(const cocos2d::Vec3& from, const cocos2d::Vec3& to, const Color4F& color);

    /**
     * Draw 3D cube
     * @param point to a vertex array who has 8 element.
     *        vertices[0]:Left-top-front,
     *        vertices[1]:Left-bottom-front,
     *        vertices[2]:Right-bottom-front,
     *        vertices[3]:Right-top-front,
     *        vertices[4]:Right-top-back,
     *        vertices[5]:Right-bottom-back,
     *        vertices[6]:Left-bottom-back,
     *        vertices[7]:Left-top-back.
     * @param color
     */
    void drawCube(cocos2d::Vec3* vertices, const Color4F& color);

    /** Clear the geometry in the node's buffer. */
    void clear();

    /**
     * @js NA
     * @lua NA
     */
    const BlendFunc& getBlendFunc() const;

    /**
     * @code
     * When this function bound into js or lua,the parameter will be changed
     * In js: var setBlendFunc(var src, var dst)
     * @endcode
     * @lua NA
     */
    void setBlendFunc(const BlendFunc& blendFunc);

    void updateCommand(cocos2d::Renderer* renderer, const cocos2d::Mat4& transform, uint32_t flags);

    // Overrides
    virtual void draw(cocos2d::Renderer* renderer, const cocos2d::Mat4& transform, uint32_t flags) override;

    CC_CONSTRUCTOR_ACCESS : DrawNode3D();
    virtual ~DrawNode3D();
    virtual bool init() override;

protected:
    void onBeforeDraw();
    void onAfterDraw();

    struct V3F_C4B
    {
        cocos2d::Vec3 vertices;
        Color4B colors;
    };
    void ensureCapacity(int count);

    BlendFunc _blendFunc;
    cocos2d::CustomCommand _customCommand;
    backend::ProgramState* _programStateLine                 = nullptr;
    backend::DepthStencilDescriptor* _depthstencilDescriptor = nullptr;
    backend::UniformLocation _locMVPMatrix;
    std::vector<V3F_C4B> _bufferLines;

private:
    CC_DISALLOW_COPY_AND_ASSIGN(DrawNode3D);

    bool _isDirty                  = true;
    bool _rendererDepthTestEnabled = true;
};

NS_CC_END

#endif  // __DRAW_NODE_3D_H__