assimp/code/AssetLib/Blender/BlenderModifier.h

/*
Open Asset Import Library (assimp)
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*/

/** @file  BlenderModifier.h
 *  @brief Declare dedicated helper classes to simulate some blender modifiers (i.e. mirror)
 */
#ifndef INCLUDED_AI_BLEND_MODIFIER_H
#define INCLUDED_AI_BLEND_MODIFIER_H

#include "BlenderIntermediate.h"

namespace Assimp {
namespace Blender {

// -------------------------------------------------------------------------------------------
/**
 *  Dummy base class for all blender modifiers. Modifiers are reused between imports, so
 *  they should be stateless and not try to cache model data.
 */
// -------------------------------------------------------------------------------------------
class BlenderModifier {
public:
    /**
     *  The class destructor, virtual.
     */
    virtual ~BlenderModifier() = default;

    // --------------------
    /**
     *  Check if *this* modifier is active, given a ModifierData& block.
     */
    virtual bool IsActive( const ModifierData& /*modin*/) {
        return false;
    }

    // --------------------
    /**
     *  Apply the modifier to a given output node. The original data used
     *  to construct the node is given as well. Not called unless IsActive()
     *  was called and gave positive response.
     */
    virtual void DoIt(aiNode& /*out*/,
        ConversionData& /*conv_data*/,
        const ElemBase& orig_modifier,
        const Scene& /*in*/,
        const Object& /*orig_object*/
    ) {
        ASSIMP_LOG_INFO("This modifier is not supported, skipping: ",orig_modifier.dna_type );
        return;
    }
};

// -------------------------------------------------------------------------------------------
/**
 *  Manage all known modifiers and instance and apply them if necessary
 */
// -------------------------------------------------------------------------------------------
class BlenderModifierShowcase {
public:
    // --------------------
    /** Apply all requested modifiers provided we support them. */
    void ApplyModifiers(aiNode& out,
        ConversionData& conv_data,
        const Scene& in,
        const Object& orig_object
    );

private:
    TempArray< std::vector,BlenderModifier > cached_modifiers;
};

// MODIFIERS /////////////////////////////////////////////////////////////////////////////////

// -------------------------------------------------------------------------------------------
/**
 *  Mirror modifier. Status: implemented.
 */
// -------------------------------------------------------------------------------------------
class BlenderModifier_Mirror : public BlenderModifier {
public:
    // --------------------
    virtual bool IsActive( const ModifierData& modin);

    // --------------------
    virtual void DoIt(aiNode& out,
        ConversionData& conv_data,
        const ElemBase& orig_modifier,
        const Scene& in,
        const Object& orig_object
    ) ;
};

// -------------------------------------------------------------------------------------------
/** Subdivision modifier. Status: dummy. */
// -------------------------------------------------------------------------------------------
class BlenderModifier_Subdivision : public BlenderModifier {
public:

    // --------------------
    virtual bool IsActive( const ModifierData& modin);

    // --------------------
    virtual void DoIt(aiNode& out,
        ConversionData& conv_data,
        const ElemBase& orig_modifier,
        const Scene& in,
        const Object& orig_object
    ) ;
};

}
}

#endif // !INCLUDED_AI_BLEND_MODIFIER_H