assimp/tools/assimp_view/Background.cpp

/*
---------------------------------------------------------------------------
Open Asset Import Library (assimp)
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*/

#include "assimp_view.h"
#include <assimp/StringUtils.h>

namespace AssimpView {

extern std::string g_szSkyboxShader;

// From: U3D build 1256 (src\kernel\graphic\scenegraph\SkyBox.cpp)
// ------------------------------------------------------------------------------
/** \brief Vertex structure for the skybox
*/
// ------------------------------------------------------------------------------
struct SkyBoxVertex
{
    float x,y,z;
    float u,v,w;
};


// ------------------------------------------------------------------------------
/** \brief Vertices for the skybox
*/
// ------------------------------------------------------------------------------
SkyBoxVertex g_cubeVertices_indexed[] =
{
    { -1.0f, 1.0f, -1.0f,   -1.0f,1.0f,-1.0f },     // 0
    { 1.0f, 1.0f,  -1.0f,   1.0f,1.0f,-1.0f },      // 1
    { -1.0f, -1.0f, -1.0f,  -1.0f,-1.0f,-1.0f },    // 2
    { 1.0f,-1.0f,-1.0f,      1.0f,-1.0f,-1.0f },    // 3
    {-1.0f, 1.0f, 1.0f,     -1.0f,1.0f,1.0f },      // 4
    {-1.0f,-1.0f, 1.0f,     -1.0f,-1.0f,1.0f },     // 5
    { 1.0f, 1.0f, 1.0f,     1.0f,1.0f,1.0f },       // 6
    { 1.0f,-1.0f, 1.0f,     1.0f,-1.0f,1.0f }       // 7
};


// ------------------------------------------------------------------------------
/** \brief Indices for the skybox
*/
// ------------------------------------------------------------------------------
unsigned short g_cubeIndices[] =
{
    0, 1, 2, 3, 2, 1,4, 5, 6,
    7, 6, 5, 4, 6,  0, 1, 6, 0,
    5, 2, 7,3, 2, 7, 1, 6, 3,
    7, 3, 6, 0, 2, 4, 5, 4, 2,
};

CBackgroundPainter CBackgroundPainter::s_cInstance;

//-------------------------------------------------------------------------------
void CBackgroundPainter::SetColor (D3DCOLOR p_clrNew)
{
    if (TEXTURE_CUBE == eMode)
        RemoveSBDeps();

    clrColor = p_clrNew;
    eMode = SIMPLE_COLOR;

    if (pcTexture)
    {
        pcTexture->Release();
        pcTexture = NULL;
    }
}
//-------------------------------------------------------------------------------
void CBackgroundPainter::RemoveSBDeps()
{
    MODE e = eMode;
    eMode = SIMPLE_COLOR;
    if (g_pcAsset && g_pcAsset->pcScene)
    {
        for (unsigned int i = 0; i < g_pcAsset->pcScene->mNumMeshes;++i)
        {
            if (aiShadingMode_Gouraud != g_pcAsset->apcMeshes[i]->eShadingMode)
            {
                CMaterialManager::Instance().DeleteMaterial(g_pcAsset->apcMeshes[i]);
                CMaterialManager::Instance().CreateMaterial(
                    g_pcAsset->apcMeshes[i],g_pcAsset->pcScene->mMeshes[i]);
            }
        }
    }
    eMode = e;
}
//-------------------------------------------------------------------------------
void CBackgroundPainter::ResetSB()
{
    mMatrix = aiMatrix4x4();
}
//-------------------------------------------------------------------------------
void CBackgroundPainter::SetCubeMapBG (const char* p_szPath)
{
    bool bHad = false;
    if (pcTexture)
    {
        pcTexture->Release();
        pcTexture = NULL;
        if(TEXTURE_CUBE ==eMode)bHad = true;
    }

    eMode = TEXTURE_CUBE;

    szPath = std::string( p_szPath );

    // ARRRGHH... ugly. TODO: Rewrite this!
    aiString sz;
    sz.Set(szPath);
    CMaterialManager::Instance().FindValidPath(&sz);
    szPath = std::string( sz.data );

    // now recreate all native resources
    RecreateNativeResource();

    if (SIMPLE_COLOR != this->eMode)
    {
        // this influences all material with specular components
        if (!bHad)
        {
            if (g_pcAsset && g_pcAsset->pcScene)
            {
                for (unsigned int i = 0; i < g_pcAsset->pcScene->mNumMeshes;++i)
                {
                    if (aiShadingMode_Phong == g_pcAsset->apcMeshes[i]->eShadingMode)
                    {
                        CMaterialManager::Instance().DeleteMaterial(g_pcAsset->apcMeshes[i]);
                        CMaterialManager::Instance().CreateMaterial(
                            g_pcAsset->apcMeshes[i],g_pcAsset->pcScene->mMeshes[i]);
                    }
                }
            }
        }
        else
        {
            if (g_pcAsset && g_pcAsset->pcScene)
            {
                for (unsigned int i = 0; i < g_pcAsset->pcScene->mNumMeshes;++i)
                {
                    if (aiShadingMode_Phong == g_pcAsset->apcMeshes[i]->eShadingMode)
                    {
                        g_pcAsset->apcMeshes[i]->piEffect->SetTexture(
                            "lw_tex_envmap",CBackgroundPainter::Instance().GetTexture());
                    }
                }
            }
        }
    }
}
//-------------------------------------------------------------------------------
void CBackgroundPainter::RotateSB(const aiMatrix4x4* pm)
{
    this->mMatrix = mMatrix * (*pm);
}
//-------------------------------------------------------------------------------
void CBackgroundPainter::SetTextureBG (const char* p_szPath)
{
    if (TEXTURE_CUBE == this->eMode)this->RemoveSBDeps();

    if (pcTexture)
    {
        pcTexture->Release();
        pcTexture = NULL;
    }

    eMode = TEXTURE_2D;
    szPath = std::string( p_szPath );

    // ARRRGHH... ugly. TODO: Rewrite this!
    aiString sz;
    sz.Set(szPath);
    CMaterialManager::Instance().FindValidPath(&sz);
    szPath = std::string( sz.data );

    // now recreate all native resources
    RecreateNativeResource();
}
//-------------------------------------------------------------------------------
void CBackgroundPainter::OnPreRender()
{
    if (SIMPLE_COLOR != eMode)
    {
        // clear the z-buffer only (in wireframe mode we must also clear
        // the color buffer )
        if (g_sOptions.eDrawMode == RenderOptions::WIREFRAME)
        {
            g_piDevice->Clear(0,NULL,D3DCLEAR_ZBUFFER | D3DCLEAR_TARGET,
                D3DCOLOR_ARGB(0xff,100,100,100),1.0f,0);
        }
        else
        {
            g_piDevice->Clear(0,NULL,D3DCLEAR_ZBUFFER,0,1.0f,0);
        }

        if (TEXTURE_2D == eMode)
        {
            RECT sRect;
            GetWindowRect(GetDlgItem(g_hDlg,IDC_RT),&sRect);
            sRect.right -= sRect.left;
            sRect.bottom -= sRect.top;

            struct SVertex
            {
                float x,y,z,w,u,v;
            };

            UINT dw;
            this->piSkyBoxEffect->Begin(&dw,0);
            this->piSkyBoxEffect->BeginPass(0);

            SVertex as[4];
            as[1].x = 0.0f;
            as[1].y = 0.0f;
            as[1].z = 0.2f;
            as[1].w = 1.0f;
            as[1].u = 0.0f;
            as[1].v = 0.0f;

            as[3].x = (float)sRect.right;
            as[3].y = 0.0f;
            as[3].z = 0.2f;
            as[3].w = 1.0f;
            as[3].u = 1.0f;
            as[3].v = 0.0f;

            as[0].x = 0.0f;
            as[0].y = (float)sRect.bottom;
            as[0].z = 0.2f;
            as[0].w = 1.0f;
            as[0].u = 0.0f;
            as[0].v = 1.0f;

            as[2].x = (float)sRect.right;
            as[2].y = (float)sRect.bottom;
            as[2].z = 0.2f;
            as[2].w = 1.0f;
            as[2].u = 1.0f;
            as[2].v = 1.0f;

            as[0].x -= 0.5f;as[1].x -= 0.5f;as[2].x -= 0.5f;as[3].x -= 0.5f;
            as[0].y -= 0.5f;as[1].y -= 0.5f;as[2].y -= 0.5f;as[3].y -= 0.5f;

            DWORD dw2;g_piDevice->GetFVF(&dw2);
            g_piDevice->SetFVF(D3DFVF_XYZRHW | D3DFVF_TEX1);

            g_piDevice->DrawPrimitiveUP(D3DPT_TRIANGLESTRIP,2,
                &as,sizeof(SVertex));

            piSkyBoxEffect->EndPass();
            piSkyBoxEffect->End();

            g_piDevice->SetFVF(dw2);
        }
        return;
    }
    // clear both the render target and the z-buffer
    g_piDevice->Clear(0,NULL,D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER,
        clrColor,1.0f,0);
}
//-------------------------------------------------------------------------------
void CBackgroundPainter::OnPostRender()
{
    if (TEXTURE_CUBE == eMode)
    {
        aiMatrix4x4 pcProj;
        GetProjectionMatrix(pcProj);

        aiMatrix4x4 pcCam;
        aiVector3D vPos = GetCameraMatrix(pcCam);

        aiMatrix4x4 aiMe;
        aiMe[3][0] = vPos.x;
        aiMe[3][1] = vPos.y;
        aiMe[3][2] = vPos.z;
        aiMe = mMatrix * aiMe;

        pcProj = (aiMe * pcCam) * pcProj;

        piSkyBoxEffect->SetMatrix("WorldViewProjection",
            (const D3DXMATRIX*)&pcProj);

        UINT dwPasses;
        piSkyBoxEffect->Begin(&dwPasses,0);
        piSkyBoxEffect->BeginPass(0);

        DWORD dw2;
        g_piDevice->GetFVF(&dw2);
        g_piDevice->SetFVF(D3DFVF_XYZ | D3DFVF_TEX1 | D3DFVF_TEXCOORDSIZE3(0));

        g_piDevice->DrawIndexedPrimitiveUP(
            D3DPT_TRIANGLELIST,0,8,12,g_cubeIndices,D3DFMT_INDEX16,
            g_cubeVertices_indexed,sizeof(SkyBoxVertex));

        g_piDevice->SetFVF(dw2);

        piSkyBoxEffect->EndPass();
        piSkyBoxEffect->End();
    }
}
//-------------------------------------------------------------------------------
void CBackgroundPainter::ReleaseNativeResource()
{
    if ( piSkyBoxEffect)
    {
        piSkyBoxEffect->Release();
        piSkyBoxEffect = NULL;
    }
    if (pcTexture)
    {
        pcTexture->Release();
        pcTexture = NULL;
    }
}
//-------------------------------------------------------------------------------
void CBackgroundPainter::RecreateNativeResource()
{
    if (SIMPLE_COLOR == eMode)return;
    if (TEXTURE_CUBE == eMode)
    {

        // many skyboxes are 16bit FP format which isn't supported
        // with bilinear filtering on older cards
        D3DFORMAT eFmt = D3DFMT_UNKNOWN;
        if(FAILED(g_piD3D->CheckDeviceFormat(0,D3DDEVTYPE_HAL,
            D3DFMT_X8R8G8B8,D3DUSAGE_QUERY_FILTER,D3DRTYPE_CUBETEXTURE,D3DFMT_A16B16G16R16F)))
        {
            eFmt = D3DFMT_A8R8G8B8;
        }

        if (FAILED(D3DXCreateCubeTextureFromFileEx(
            g_piDevice,
            szPath.c_str(),
            D3DX_DEFAULT,
            0,
            0,
            eFmt,
            D3DPOOL_MANAGED,
            D3DX_DEFAULT,
            D3DX_DEFAULT,
            0,
            NULL,
            NULL,
            (IDirect3DCubeTexture9**)&pcTexture)))
        {
            const char* szEnd = strrchr(szPath.c_str(),'\\');
            if (!szEnd)szEnd = strrchr(szPath.c_str(),'/');
            if (!szEnd)szEnd = szPath.c_str()-1;

            char szTemp[1024];
			ai_snprintf(szTemp,1024,"[ERROR] Unable to load background cubemap %s",szEnd+1);

            CLogDisplay::Instance().AddEntry(szTemp,
                D3DCOLOR_ARGB(0xFF,0xFF,0,0));

            eMode = SIMPLE_COLOR;
            return;
        }
        else CLogDisplay::Instance().AddEntry("[OK] The skybox has been imported successfully",
            D3DCOLOR_ARGB(0xFF,0,0xFF,0));
    }
    else
    {
        if (FAILED(D3DXCreateTextureFromFileEx(
            g_piDevice,
            szPath.c_str(),
            D3DX_DEFAULT,
            D3DX_DEFAULT,
            0,
            0,
            D3DFMT_A8R8G8B8,
            D3DPOOL_MANAGED,
            D3DX_DEFAULT,
            D3DX_DEFAULT,
            0,
            NULL,
            NULL,
            (IDirect3DTexture9**)&pcTexture)))
        {
            const char* szEnd = strrchr(szPath.c_str(),'\\');
            if (!szEnd)szEnd = strrchr(szPath.c_str(),'/');
            if (!szEnd)szEnd = szPath.c_str()-1;

            char szTemp[1024];
			ai_snprintf(szTemp,1024,"[ERROR] Unable to load background texture %s",szEnd+1);

            CLogDisplay::Instance().AddEntry(szTemp,
                D3DCOLOR_ARGB(0xFF,0xFF,0,0));

            eMode = SIMPLE_COLOR;
            return;
        }
        else CLogDisplay::Instance().AddEntry("[OK] The background texture has been imported successfully",
            D3DCOLOR_ARGB(0xFF,0,0xFF,0));
    }
    if (!piSkyBoxEffect)
    {
        ID3DXBuffer* piBuffer = NULL;
        if(FAILED( D3DXCreateEffect(
            g_piDevice,
            g_szSkyboxShader.c_str(),
            (UINT)g_szSkyboxShader.length(),
            NULL,
            NULL,
            AI_SHADER_COMPILE_FLAGS,
            NULL,
            &piSkyBoxEffect,&piBuffer)))
        {
            // failed to compile the shader
            if( piBuffer) {
                MessageBox(g_hDlg,(LPCSTR)piBuffer->GetBufferPointer(),"HLSL",MB_OK);
                piBuffer->Release();
            }

            CLogDisplay::Instance().AddEntry("[ERROR] Unable to compile skybox shader",
                D3DCOLOR_ARGB(0xFF,0xFF,0,0));
            eMode = SIMPLE_COLOR;
            return ;
        }
    }
    // commit the correct textures to the shader
    if (TEXTURE_CUBE == eMode)
    {
        piSkyBoxEffect->SetTexture("lw_tex_envmap",pcTexture);
        piSkyBoxEffect->SetTechnique("RenderSkyBox");
    }
    else if (TEXTURE_2D == eMode)
    {
        piSkyBoxEffect->SetTexture("TEXTURE_2D",pcTexture);
        piSkyBoxEffect->SetTechnique("RenderImage2D");
    }
}
};