assimp-fez/tools/assimp_view/AssetHelper.h

/*
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Open Asset Import Library (assimp)
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All rights reserved.

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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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*/

#if (!defined AV_ASSET_HELPER_H_INCLUDED)
#define AV_ASSET_HELPER_H_INCLUDED

#include <d3d9.h>
#include <d3dx9.h>
#include <d3dx9mesh.h>

#include <assimp/scene.h>

namespace AssimpView {

class SceneAnimator;

//-------------------------------------------------------------------------------
/** \brief Class to wrap ASSIMP's asset output structures
    */
//-------------------------------------------------------------------------------
class AssetHelper {
public:
    enum {
        // the original normal set will be used
        ORIGINAL = 0x0u,

        // a smoothed normal set will be used
        SMOOTH = 0x1u,

        // a hard normal set will be used
        HARD = 0x2u,
    };

    // default constructor
    AssetHelper() :
            iNormalSet(ORIGINAL) {
        mAnimator = NULL;
        apcMeshes = NULL;
        pcScene = NULL;
    }

    // set the normal set to be used
    void SetNormalSet(unsigned int iSet);

    // flip all normal vectors
    void FlipNormals();
    void FlipNormalsInt();

    //---------------------------------------------------------------
    // default vertex data structure
    // (even if tangents, bitangents or normals aren't
    // required by the shader they will be committed to the GPU)
    //---------------------------------------------------------------
    struct Vertex {
        aiVector3D vPosition;
        aiVector3D vNormal;

        D3DCOLOR dColorDiffuse;
        aiVector3D vTangent;
        aiVector3D vBitangent;
        aiVector2D vTextureUV;
        aiVector2D vTextureUV2;
        unsigned char mBoneIndices[4];
        unsigned char mBoneWeights[4]; // last Weight not used, calculated inside the vertex shader

        /** Returns the vertex declaration elements to create a declaration from. */
        static D3DVERTEXELEMENT9 *GetDeclarationElements() {
            static D3DVERTEXELEMENT9 decl[] = {
                { 0, 0, D3DDECLTYPE_FLOAT3, D3DDECLMETHOD_DEFAULT, D3DDECLUSAGE_POSITION, 0 },
                { 0, 12, D3DDECLTYPE_FLOAT3, D3DDECLMETHOD_DEFAULT, D3DDECLUSAGE_NORMAL, 0 },
                { 0, 24, D3DDECLTYPE_D3DCOLOR, D3DDECLMETHOD_DEFAULT, D3DDECLUSAGE_COLOR, 0 },
                { 0, 28, D3DDECLTYPE_FLOAT3, D3DDECLMETHOD_DEFAULT, D3DDECLUSAGE_TANGENT, 0 },
                { 0, 40, D3DDECLTYPE_FLOAT3, D3DDECLMETHOD_DEFAULT, D3DDECLUSAGE_BINORMAL, 0 },
                { 0, 52, D3DDECLTYPE_FLOAT2, D3DDECLMETHOD_DEFAULT, D3DDECLUSAGE_TEXCOORD, 0 },
                { 0, 60, D3DDECLTYPE_FLOAT2, D3DDECLMETHOD_DEFAULT, D3DDECLUSAGE_TEXCOORD, 1 },
                { 0, 68, D3DDECLTYPE_UBYTE4, D3DDECLMETHOD_DEFAULT, D3DDECLUSAGE_BLENDINDICES, 0 },
                { 0, 72, D3DDECLTYPE_UBYTE4N, D3DDECLMETHOD_DEFAULT, D3DDECLUSAGE_BLENDWEIGHT, 0 },
                D3DDECL_END()
            };

            return decl;
        }
    };

    //---------------------------------------------------------------
    // FVF vertex structure used for normals
    //---------------------------------------------------------------
    struct LineVertex {
        aiVector3D vPosition;
        DWORD dColorDiffuse;

        // retrieves the FVF code of the vertex type
        static DWORD GetFVF() {
            return D3DFVF_DIFFUSE | D3DFVF_XYZ;
        }
    };

    //---------------------------------------------------------------
    // Helper class to store GPU related resources created for
    // a given aiMesh
    //---------------------------------------------------------------
    class MeshHelper {
    public:
        MeshHelper() :
                eShadingMode(),
                piVB(NULL),
                piIB(NULL),
                piVBNormals(NULL),
                piEffect(NULL),
                bSharedFX(false),
                piDiffuseTexture(NULL),
                piSpecularTexture(NULL),
                piAmbientTexture(NULL),
                piEmissiveTexture(NULL),
                piNormalTexture(NULL),
                piOpacityTexture(NULL),
                piShininessTexture(NULL),
                piLightmapTexture(NULL),
                fOpacity(),
                fShininess(),
                fSpecularStrength(),
                twosided(false),
                pvOriginalNormals(NULL) {}

        ~MeshHelper() {
            // NOTE: This is done in DeleteAssetData()
            // TODO: Make this a proper d'tor
        }

        // shading mode to use. Either Lambert or otherwise phong
        // will be used in every case
        aiShadingMode eShadingMode;

        // vertex buffer
        IDirect3DVertexBuffer9 *piVB;

        // index buffer. For partially transparent meshes
        // created with dynamic usage to be able to update
        // the buffer contents quickly
        IDirect3DIndexBuffer9 *piIB;

        // vertex buffer to be used to draw vertex normals
        // (vertex normals are generated in every case)
        IDirect3DVertexBuffer9 *piVBNormals;

        // shader to be used
        ID3DXEffect *piEffect;
        bool bSharedFX;

        // material textures
        IDirect3DTexture9 *piDiffuseTexture;
        IDirect3DTexture9 *piSpecularTexture;
        IDirect3DTexture9 *piAmbientTexture;
        IDirect3DTexture9 *piEmissiveTexture;
        IDirect3DTexture9 *piNormalTexture;
        IDirect3DTexture9 *piOpacityTexture;
        IDirect3DTexture9 *piShininessTexture;
        IDirect3DTexture9 *piLightmapTexture;

        // material colors
        D3DXVECTOR4 vDiffuseColor;
        D3DXVECTOR4 vSpecularColor;
        D3DXVECTOR4 vAmbientColor;
        D3DXVECTOR4 vEmissiveColor;

        // opacity for the material
        float fOpacity;

        // shininess for the material
        float fShininess;

        // strength of the specular highlight
        float fSpecularStrength;

        // two-sided?
        bool twosided;

        // Stores a pointer to the original normal set of the asset
        aiVector3D *pvOriginalNormals;
    };

    // One instance per aiMesh in the globally loaded asset
    MeshHelper **apcMeshes;

    // Scene wrapper instance
    aiScene *pcScene;

    // Animation player to animate the scene if necessary
    SceneAnimator *mAnimator;

    // Specifies the normal set to be used
    unsigned int iNormalSet;
};

} // namespace AssimpView

#endif // !! IG