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先看一下fx文件：hlsl.fx
// -------------------------------------------------------------
// -------------------------------------------------------------
// variables that are provided by the application
// -------------------------------------------------------------
float4x4 matWorldViewProj;
float4x4 matWorld;
float4 vecLightDir;
texture g_MeshTexture;
sampler MeshTextureSampler =
sampler_state
{
Texture = <g_MeshTexture>;
MipFilter = LINEAR;
MinFilter = LINEAR;
MagFilter = LINEAR;
};
// -------------------------------------------------------------
// Output channels
// -------------------------------------------------------------
struct VS_OUTPUT
{
float4 Pos : POSITION;
float4 Diffuse: COLOR0;
float2 TexUV : TEXCOORD0;
float3 Norm : TEXCOORD1;
};
// -------------------------------------------------------------
// vertex shader function (input channels)
// -------------------------------------------------------------
VS_OUTPUT VS(float4 Pos : POSITION,float4 Color:COLOR0,float2 TexUV: TEXCOORD0,float3 Norm:NORMAL)
{
VS_OUTPUT Out;
Out.Pos = mul(Pos, matWorldViewProj); // transform Position
Out.TexUV=TexUV;
Out.Diffuse = Color;
Out.Norm = mul(Norm, matWorld);
return Out;
}
// -------------------------------------------------------------
// Pixel Shader (input channels) utput channel
// -------------------------------------------------------------
struct PS_OUTPUT
{
float4 RGBColor : COLOR0; // Pixel color
};
PS_OUTPUT PS(VS_OUTPUT In) : COLOR
{
PS_OUTPUT Output;
float4 Nom= saturate(dot(In.Norm, vecLightDir)); // diffuse component
Output.RGBColor= tex2D(MeshTextureSampler, In.TexUV)* In.Diffuse*Nom;
return Output;
}
// -------------------------------------------------------------
//
// -------------------------------------------------------------
technique TShader
{
pass P0
{
// compile shaders
VertexShader = compile vs_1_1 VS();
PixelShader = compile ps_1_4 PS();
}
}
//然后是源码：
//-----------------------------------------------------------------------------
// File: Matrices.cpp
//
// Desc: Now that we know how to create a device and render some 2D vertices,
// this tutorial goes the next step and renders 3D geometry. To deal with
// 3D geometry we need to introduce the use of 4x4 matrices to transform
// the geometry with translations, rotations, scaling, and setting up our
// camera.
//
// Geometry is defined in model space. We can move it (translation),
// rotate it (rotation), or stretch it (scaling) using a world transform.
// The geometry is then said to be in world space. Next, we need to
// position the camera, or eye point, somewhere to look at the geometry.
// Another transform, via the view matrix, is used, to position and
// rotate our view. With the geometry then in view space, our last
// transform is the projection transform, which "projects" the 3D scene
// into our 2D viewport.
//
// Note that in this tutorial, we are introducing the use of D3DX, which
// is a set of helper utilities for D3D. In this case, we are using some
// of D3DX's useful matrix initialization functions. To use D3DX, simply
// include <d3dx9.h> and link with d3dx9.lib.
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//-----------------------------------------------------------------------------
#include <Windows.h>
#include <mmsystem.h>
#include <d3dx9.h>
#include <strsafe.h>
//-----------------------------------------------------------------------------
// Global variables
//-----------------------------------------------------------------------------
LPDIRECT3D9 g_pD3D = NULL; // Used to create the D3DDevice
LPDIRECT3DDEVICE9 g_pd3dDevice = NULL; // Our rendering device
LPDIRECT3DVERTEXBUFFER9 g_pVB = NULL; // Buffer to hold vertices
LPD3DXEFFECT g_pEffect = NULL;
LPDIRECT3DTEXTURE9 g_pTexture = NULL; // Our texture
D3DXVECTOR4 g_LightDir= D3DXVECTOR4( 0.0f, 0.0f, 1.0f, 1.0f );
// A structure for our custom vertex type
struct CUSTOMVERTEX
{
FLOAT x, y, z ; // The untransformed, 3D position for the vertex
DWORD Color; // The vertex color
FLOAT tu, tv;
FLOAT nx,ny,nz;
};
// Our custom FVF, which describes our custom vertex structure
#define D3DFVF_CUSTOMVERTEX (D3DFVF_XYZ|D3DFVF_DIFFUSE|D3DFVF_TEX1|D3DFVF_NORMAL)
//-----------------------------------------------------------------------------
// Name: InitD3D()
// Desc: Initializes Direct3D
//-----------------------------------------------------------------------------
HRESULT InitD3D( HWND hWnd )
{
// Create the D3D object.
if( NULL == ( g_pD3D = Direct3DCreate9( D3D_SDK_VERSION ) ) )
return E_FAIL;
// Set up the structure used to create the D3DDevice
D3DPRESENT_PARAMETERS d3dpp;
ZeroMemory( &d3dpp, sizeof(d3dpp) );
d3dpp.Windowed = TRUE;
d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
d3dpp.BackBufferFormat = D3DFMT_UNKNOWN;
// Create the D3DDevice
if( FAILED( g_pD3D->CreateDevice( D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hWnd,
D3DCREATE_SOFTWARE_VERTEXPROCESSING,
&d3dpp, &g_pd3dDevice ) ) )
{
return E_FAIL;
}
// Turn off culling, so we see the front and back of the triangle
g_pd3dDevice->SetRenderState( D3DRS_CULLMODE, D3DCULL_NONE );
// Turn off D3D lighting, since we are providing our own vertex colors
g_pd3dDevice->SetRenderState( D3DRS_LIGHTING, FALSE );
g_pd3dDevice->SetRenderState( D3DRS_DITHERENABLE, TRUE );
//创建HLSH
if( FAILED(D3DXCreateEffectFromFile( g_pd3dDevice, "hlsl.fx", NULL, NULL,
D3DXSHADER_DEBUG, NULL, &g_pEffect, NULL ) ) )
{
return E_FAIL;
}
if( g_pEffect != NULL ) g_pEffect->OnResetDevice();
//设定效果:因为只有一个，所以初始时就设了~
D3DXHANDLE hTechnique = g_pEffect->GetTechniqueByName( "TShader" );
g_pEffect->SetTechnique( hTechnique );
return S_OK;
}
//-----------------------------------------------------------------------------
// Name: InitGeometry()
// Desc: Creates the scene geometry
//-----------------------------------------------------------------------------
HRESULT InitGeometry()
{
// Initialize three vertices for rendering a triangle
CUSTOMVERTEX g_Vertices[] =
{
{ -1.0f,-1.0f, 0.0f, 0xffffffff, 0.0f,1.0f ,-1.0f,-1.0f, 0.0f},
{ 1.0f,-1.0f, 0.0f, 0xffffffff, 1.0f,1.0f ,1.0f,-1.0f, 0.0f},
{ 0.0f, 1.0f, 0.0f, 0xffffffff, 0.5f,0.0f ,0.0f, 1.0f, 0.0f },
};
// Create the vertex buffer.
if( FAILED( g_pd3dDevice->CreateVertexBuffer( 3*sizeof(CUSTOMVERTEX),
0, D3DFVF_CUSTOMVERTEX,
D3DPOOL_DEFAULT, &g_pVB, NULL ) ) )
{
return E_FAIL;
}
// Fill the vertex buffer.
VOID* pVertices;
if( FAILED( g_pVB->Lock( 0, sizeof(g_Vertices), (void**)&pVertices, 0 ) ) )
return E_FAIL;
memcpy( pVertices, g_Vertices, sizeof(g_Vertices) );
g_pVB->Unlock();
if( FAILED( D3DXCreateTextureFromFile( g_pd3dDevice, "banana.bmp", &g_pTexture ) ) )
{
// If texture is not in current folder, try parent folder
if( FAILED( D3DXCreateTextureFromFile( g_pd3dDevice, "..\\banana.bmp", &g_pTexture ) ) )
{
MessageBox(NULL, "Could not find banana.bmp", "Textures.exe", MB_OK);
return E_FAIL;
}
}
g_pEffect->SetTexture( "g_MeshTexture", g_pTexture );
return S_OK;
}
//-----------------------------------------------------------------------------
// Name: Cleanup()
// Desc: Releases all previously initialized objects
//-----------------------------------------------------------------------------
VOID Cleanup()
{
if( g_pTexture != NULL )
g_pTexture->Release();
if( g_pEffect != NULL )
g_pEffect->Release();
if( g_pVB != NULL )
g_pVB->Release();
if( g_pd3dDevice != NULL )
g_pd3dDevice->Release();
if( g_pD3D != NULL )
g_pD3D->Release();
}
//-----------------------------------------------------------------------------
// Name: SetupMatrices()
// Desc: Sets up the world, view, and projection transform matrices.
//-----------------------------------------------------------------------------
VOID SetupMatrices()
{
// For our world matrix, we will just rotate the object about the y-axis.
D3DXMATRIXA16 matWorld;
UINT iTime = timeGetTime() % 1000;
FLOAT fAngle = iTime * (2.0f * D3DX_PI) / 1000.0f;
D3DXMatrixRotationY( &matWorld, fAngle );
D3DXVECTOR3 vEyePt( 0.0f, 3.0f,-5.0f );
D3DXVECTOR3 vLookatPt( 0.0f, 0.0f, 0.0f );
D3DXVECTOR3 vUpVec( 0.0f, 1.0f, 0.0f );
D3DXMATRIXA16 matView;
D3DXMatrixLookAtLH( &matView, &vEyePt, &vLookatPt, &vUpVec );
D3DXMATRIXA16 matProj;
D3DXMatrixPerspectiveFovLH( &matProj, D3DX_PI/4, 1.0f, 1.0f, 100.0f );
//设置光线和眼睛位置
g_pEffect->SetVector("vecLightDir", &-g_LightDir);
//g_pEffect->SetVector("vecEye", &D3DXVECTOR4(vEyePt.x,vEyePt.y,vEyePt.z,0));
//设定VS矩阵
D3DXMATRIX mWorldViewProj = matWorld * matView * matProj;
g_pEffect->SetMatrix( "matWorldViewProj", &mWorldViewProj );
g_pEffect->SetMatrix( "matWorld", &matWorld );
}
//-----------------------------------------------------------------------------
// Name: Render()
// Desc: Draws the scene
//-----------------------------------------------------------------------------
VOID Render()
{
// Clear the backbuffer to a black color
g_pd3dDevice->Clear( 0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(0,0,0), 1.0f, 0 );
// Begin the scene
if( SUCCEEDED( g_pd3dDevice->BeginScene() ) )
{
// Setup the world, view, and projection matrices
SetupMatrices();
// Render the vertex buffer contents
g_pd3dDevice->SetTexture( 0, g_pTexture );
g_pd3dDevice->SetTextureStageState( 0, D3DTSS_COLOROP, D3DTOP_MODULATE );
g_pd3dDevice->SetTextureStageState( 0, D3DTSS_COLORARG1, D3DTA_TEXTURE );
g_pd3dDevice->SetTextureStageState( 0, D3DTSS_COLORARG2, D3DTA_DIFFUSE );
g_pd3dDevice->SetTextureStageState( 0, D3DTSS_ALPHAOP, D3DTOP_DISABLE );
//按VS，PS渲染
if( g_pEffect != NULL )
{
UINT nPasses=0;
UINT iPass=0;
if(SUCCEEDED(g_pEffect->Begin( &nPasses, 0 )))
{
for(iPass = 0; iPass < nPasses; iPass ++ )
{
g_pEffect->BeginPass( 0 );
}
g_pd3dDevice->SetStreamSource( 0, g_pVB, 0, sizeof(CUSTOMVERTEX) );
g_pd3dDevice->SetFVF( D3DFVF_CUSTOMVERTEX );
g_pd3dDevice->DrawPrimitive( D3DPT_TRIANGLESTRIP, 0, 1 );
g_pEffect->EndPass();
g_pEffect->End();
}
}
// End the scene
g_pd3dDevice->EndScene();
}
// Present the backbuffer contents to the display
g_pd3dDevice-> resent( NULL, NULL, NULL, NULL );
}
//-----------------------------------------------------------------------------
// Name: MsgProc()
// Desc: The window's message handler
//-----------------------------------------------------------------------------
LRESULT WINAPI MsgProc( HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam )
{
switch( msg )
{
case WM_DESTROY:
Cleanup();
PostQuitMessage( 0 );
return 0;
}
return DefWindowProc( hWnd, msg, wParam, lParam );
}
//-----------------------------------------------------------------------------
// Name: WinMain()
// Desc: The application's entry point
//-----------------------------------------------------------------------------
INT WINAPI WinMain( HINSTANCE hInst, HINSTANCE, LPSTR, INT )
{
// Register the window class
WNDCLASSEX wc = { sizeof(WNDCLASSEX), CS_CLASSDC, MsgProc, 0L, 0L,
GetModuleHandle(NULL), NULL, NULL, NULL, NULL,
"D3D Tutorial", NULL };
RegisterClassEx( &wc );
// Create the application's window
HWND hWnd = CreateWindow( "D3D Tutorial", "HLSL学习",
WS_OVERLAPPEDWINDOW, 100, 100, 256, 256,
GetDesktopWindow(), NULL, wc.hInstance, NULL );
// Initialize Direct3D
if( SUCCEEDED( InitD3D( hWnd ) ) )
{
// Create the scene geometry
if( SUCCEEDED( InitGeometry() ) )
{
// Show the window
ShowWindow( hWnd, SW_SHOWDEFAULT );
UpdateWindow( hWnd );
// Enter the message loop
MSG msg;
ZeroMemory( &msg, sizeof(msg) );
while( msg.message!=WM_QUIT )
{
if( PeekMessage( &msg, NULL, 0U, 0U, PM_REMOVE ) )
{
TranslateMessage( &msg );
DispatchMessage( &msg );
}
else
Render();
}
}
}
UnregisterClass( "D3D Tutorial", wc.hInstance );
return 0;
}
应该是好懂的。但是为何运行后不显示了。
但是如果顶点格式中去掉法线，fx中也去掉法线。就没问题了，色彩与纹理混合正常。
[em3] |
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发表于 2005-11-17 18:38:00
楼主