D3d9 Effect Research and learning

Part one of the procedure

1, the definition of several global variables:

id3dxeffect*                g_peffect = null;d3dxmatrixa16               g_mcenterworld;d3dxhandle                  g_hworld = Null;d3dxhandle                  g _hworldviewprojection = null;d3dxhandle                  g_htechniquerenderscene = NULL;

2, equipment inspection

BOOL Isdeviceacceptable (d3dcaps9* pcaps,d3dformat adapterformat,d3dformat backbufferformat,bool bWindowed,void* Pusercontext) {    if (Pcaps->pixelshaderversion < d3dps_version (2, 0))  //check pixel shader        return false;

<pre name= "code" class= "CPP" >//<span style= "font-family:arial; font-size:14px; line-height:26px; " > Render a </span><span style= "FONT-SIZE:14PX; line-height:26px; Font-family:calibri; " >surface</span><span style= "font-family:arial; font-size:14px; line-height:26px; " >, it is usually necessary to check this </span><span style= "FONT-SIZE:14PX; line-height:26px; Font-family:calibri; " >surface</span><span style= "font-family:arial; font-size:14px; line-height:26px; " > </span><span style= "font-family:arial; font-size:14px; line-height:26px; " > Format </span><span style= "font-family:arial; font-size:14px; line-height:26px; " Whether > can be used for </span><span style= "FONT-SIZE:14PX; line-height:26px; Font-family:calibri; " >texture</span><span style= "font-family:arial; font-size:14px; line-height:26px; " >, </span><span style= "FONT-SIZE:14PX; line-height:26px; Font-family:calibri; " >rendertarget</span><Span style= "font-family:arial; font-size:14px; line-height:26px; " >, </span><span style= "FONT-SIZE:14PX; line-height:26px; Font-family:calibri; " >depth-stenil buffer</span>

idirect3d9* pd3d = Dxutgetd3d9object (); if (FAILED (Pd3d->checkdeviceformat (pcaps->adapterordinal, Pcaps->devicetype, Adapterformat, D3DUSAGE_ Query_postpixelshader_blending, D3drtype_texture, Backbufferformat)) return false; return true;}

3. Effect file Creation loading

hresult d3dxcreateeffectfromfile (_In_    Lpdirect3ddevice9 pdevice,//d3d device _in_   lpctstr psrcfile,//file name or path to be loaded _in_  & nbsp const  D3dxmacro *pdefines, _in_   lpd3dxinclude pinclude, _in_   dword Flags, _In_    lpd3dxeffectpool Ppool, _out_  lpd3dxeffect *ppeffect, _out_  lpd3dxbuffer * ppcompilationerrors); 

typedef struct D3dxmacro {  LPCSTR Name;  LPCSTR Definition;} D3dxmacro, *lpd3dxmacro;

HRESULT Oncreateloadfile (idirect3ddevice9* pd3ddevice, const d3dsurface_desc* pbackbuffersurfacedesc,void* Pusercontext) {    dxutfinddxsdkmediafilecch (str, MAX_PATH, TEXT ("Compiledeffect.fxo"));  Find file path    V_return (D3dxcreateeffectfromfile (pd3ddevice, str, NULL, NULL, d3dxfx_not_cloneable, NULL, &g_ Peffect, NULL));    return S_OK;}

4. Get the variable handle in the effect file

HRESULT Geteffectparameterhandle (idirect3ddevice9* pd3ddevice,                                const d3dsurface_desc* PBACKBUFFERSURFACEDESC, void* pusercontext) {    d3dxcolor colormtrldiffuse (1.0f, 1.0f, 1.0f, 1.0f);    D3dxcolor colormtrlambient (0.35f, 0.35f, 0.35f, 0);

    G_peffect->setvector ("G_materialambientcolor", (d3dxvector4*) &colormtrlambient);  Set global variable    g_peffect->setvector ("G_materialdiffusecolor", (d3dxvector4*) &colormtrldiffuse);    G_htechniquerenderscene = G_peffect->gettechniquebyname ("Renderscene");              Get effect    g_htime = G_peffect->getparameterbyname (NULL, "g_ftime");    G_hworld = G_peffect->getparameterbyname (NULL, "G_mworld");    G_hworldviewprojection = G_peffect->getparameterbyname (NULL, "g_mworldviewprojection");    G_hmeshtexture = G_peffect->getparameterbyname (NULL, "g_meshtexture");    return S_OK;}

5. Set the data

void Seteffectparater (double ftime, float felapsedtime, void* pusercontext) {    d3dxmatrixa16 mworld;    D3dxmatrixa16 MView;    D3dxmatrixa16 mProj;    D3dxmatrixa16 mworldviewprojection;    Mworld = G_mcenterworld * *g_camera.getworldmatrix ();    MProj = *g_camera.getprojmatrix ();    MView = *g_camera.getviewmatrix ();    mworldviewprojection = Mworld * MView * mProj;    G_peffect->setmatrix (G_hworldviewprojection, &mworldviewprojection);    G_peffect->setmatrix (G_hworld, &mworld);    G_peffect->setfloat (G_htime, (float) ftime);}

6. Rendering

void Rendereffect (idirect3ddevice9* pd3ddevice, double ftime, float felapsedtime, void* pusercontext) {    Pd3ddevice->clear (0, NULL, D3dclear_target | D3dclear_zbuffer, D3dcolor_argb (0, 1.0f, 0);    Pd3ddevice->beginscene ()

        UINT IPass, cpasses;                           Effect Rendering        g_peffect->begin (&cpasses, 0);        for (iPass = 0; IPass < cpasses; ipass++)        {            g_peffect->beginpass (iPass);

                          Other transaction rendering

            G_peffect->endpass ();

        }        g_peffect->end ();

     Pd3ddevice->endscene ();}

7. Release related Resources

void Onlostdevice () {    if (g_peffect)        g_peffect->onlostdevice ();} void Ondestroydevice () {    safe_release (g_peffect);}

Second, the FX file part

Global variables

FLOAT4 g_materialambientcolor;float4 G_materialdiffusecolor;float3 g_lightdir = Normalize (FLOAT3 (1.0f, 1.0f, -1.0f)); Float4 g_lightambient = {0.2f, 0.2f, 0.2f, 0.2f};float4 g_lightdiffuse = {1.0f, 1.0f, 1.0f, 1.0f};texture g_rendertarg ettexture;//Full screen render target texture float g_ftime;float4x4 g_mworld;float4x4 g_mworldviewprojection;sampler RenderTargetSampler =    sampler_state{Texture = <g_RenderTargetTexture>;      Minfilter = point;    Magfilter = point;    Mipfilter = NONE;    Addressu = Clamp; ADDRESSV = Clamp;};    struct vs_output{float4 position:position;     FLOAT4 diffuse:color0; Float2 textureuv:texcoord0;};                         Vs_output Renderscenevs (float4 vpos:position, Float3 Vnormal:normal,    Float2 vtexcoord0:texcoord0) {vs_output OUTPUT;      FLOAT3 Vnormalworldspace;    FLOAT4 vanimatedpos = vPOS;    Vanimatedpos.x *= (1.0 + cos (g_ftime)/10);    Vanimatedpos.y *= (1.0 + sin (g_ftime)/10); Vanimatedpos.z *= (1.0 + COS (g_ftime)/10);    Output.position = Mul (Vanimatedpos, g_mworldviewprojection);    Vnormalworldspace = Normalize (Mul (Vnormal, (float3x3) g_mworld));                          Output.Diffuse.rgb = G_materialdiffusecolor * g_lightdiffuse * MAX (0,dot (Vnormalworldspace, g_lightdir)) +       G_materialambientcolor * g_lightambient;     Output.diffuse.a = 1.0f;     OUTPUT.TEXTUREUV = vTexCoord0;    return Output; }struct ps_output{float4 rgbcolor:color0;};    Ps_output rendersceneps (Vs_output in) {Ps_output OUTPUT;    Output.rgbcolor = tex2d (Meshtexturesampler, IN.TEXTUREUV) * in.diffuse; return Output;}                                          Technique renderscene{Pass P0 {zenable = true;        Z-buffer vertexshader = Compile vs_2_0 renderscenevs ();    PixelShader = Compile ps_2_0 rendersceneps (); }}

D3d9 Effect Research and learning