axmol/core/physics3d/Physics3DDebugDrawer.h

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

 https://axmolengine.github.io/

 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights
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 The above copyright notice and this permission notice shall be included in
 all copies or substantial portions of the Software.

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#ifndef __PHYSICS_3D_VIEWER_H__
#define __PHYSICS_3D_VIEWER_H__

#include "math/Math.h"
#include "base/Ref.h"
#include "base/Types.h"
#include "base/Config.h"
#include "renderer/CustomCommand.h"
#include "renderer/backend/ProgramState.h"
#include "renderer/backend/Types.h"

#if AX_USE_3D_PHYSICS

#    if (AX_ENABLE_BULLET_INTEGRATION)
#        include "bullet/LinearMath/btIDebugDraw.h"

NS_AX_BEGIN

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

class Renderer;

/** @brief Physics3DDebugDrawer: debug draw the physics object, used by Physics3DWorld */
class Physics3DDebugDrawer : public btIDebugDraw
{
public:
    Physics3DDebugDrawer();
    virtual ~Physics3DDebugDrawer();

    void draw(ax::Renderer* renderer);

    // override function
    virtual void drawLine(const btVector3& from, const btVector3& to, const btVector3& color) override;
    virtual void drawContactPoint(const btVector3& PointOnB,
                                  const btVector3& normalOnB,
                                  btScalar distance,
                                  int lifeTime,
                                  const btVector3& color) override;
    virtual void reportErrorWarning(const char* warningString) override;
    virtual void draw3dText(const btVector3& location, const char* textString) override;
    virtual void setDebugMode(int debugMode) override;
    virtual int getDebugMode() const override;

    void clear();

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

protected:
    struct V3F_V4F
    {
        ax::Vec3 vertex;
        ax::Vec4 color;
    };

    std::vector<V3F_V4F> _buffer;
    ax::backend::UniformLocation _locMVP;

    ax::BlendFunc _blendFunc = BlendFunc::DISABLE;
    ax::CustomCommand _customCommand;
    ax::backend::ProgramState* _programState = nullptr;

    bool _dirty    = true;
    int _debugMode = DBG_DrawWireframe | DBG_DrawConstraints | DBG_DrawConstraintLimits;

private:
    bool _oldDepthTestEnabled = false;
};

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

NS_AX_END

#    endif  // AX_ENABLE_BULLET_INTEGRATION

#endif  // AX_USE_3D_PHYSICS

#endif  // __PHYSICS_3D_VIEWER_H__