梦幻DUO的游戏开发之路

we have provided the following code block that locks a surface and colors each pixel red:// Assume _surface is a pointer to an IDirect3DSurface9 interface.// Assumes a 32-bit pixel format fo

In general, most applications work fine with a 24-bit depth buffer, although Direct3D also exposes a 32-bit depth buffer.D3DFMT_D32—Specifies a 32-bit depth bufferD3DFMT_D24S8—Specifies a 24

D3DXPLANEThe D3DX library uses the followingstructure for a plane:typedef struct D3DXPLANE{#ifdef __cpluspluspublic:D3DXPLANE() {}D3DXPLANE( CONST FLOAT* );D3DXPLANE( CONST D3DXFLOAT

//////////////////////////////////////////////////////////////////////////////////////////////////// // File: triangle.cpp// // Author: Frank Luna (C) All Rights Reserved//// System: AMD Athlon

//////////////////////////////////////////////////////////////////////////////////////////////////// // File: d3dxcreate.cpp// // Author: Frank D. Luna (C) All Rights Reserved//// System: AMD At

//////////////////////////////////////////////////////////////////////////////////////////////////// // File: teapot.cpp// // Author: Frank Luna (C) All Rights Reserved//// System: AMD Athlon 18

绘画准备Once we have created a vertex buffer and, optionally, an index buffer, we are almost ready to render its contents, but there are three steps that must be taken first.1. Set the stream source

检索关于顶点和索引的信息The following example demonstrates the methods used to obtain such information:D3DVERTEXBUFFER_DESC vbDescription;_vertexBuffer->GetDesc(&vbDescription); // get vb infoD3DINDEXBU

C++ 进入缓存内存We obtain a pointer to its contents by using theLockmethod. It is important to unlock the buffer when we are done accessing it.HRESULT IDirect3DVertexBuffer9::Lock(UINT OffsetToLock,

C++ 创建顶点和索引缓存We can create a vertex and index buffer with the following two methods:HRESULT IDirect3DDevice9::CreateVertexBuffer(UINT Length,DWORD Usage,DWORD FVF,D3DPOOL PoolIDirect3D

IDirect3DDevice9::DrawPrimitiveThis method is used to draw primitives that do not use index info.HRESULT IDirect3DDevice9::DrawPrimitive(D3DPRIMITIVETYPE PrimitiveType,UINT StartVertex,UIN

IDirect3DDevice9::DrawIndexedPrimitiveThis method is used to draw primitives using index info.HRESULT IDirect3DDevice9::DrawIndexedPrimitive(D3DPRIMITIVETYPE Type,INT BaseVertexIndex,UINT

Begin/End SceneThe last bit of information to mention is that all drawing methods must be called inside an IDirect3DDevice9::BeginSceneand IDirect3DDevice9::EndScenepair. For example, we would wri

The format of a pixel is defined byspecifying a member of theD3DFORMATenumerated type. Some formats are:D3DFMT_R8G8B8—Specifies a 24-bitpixel format where, startingfrom the leftmost bit, 8 bits

MultisamplingD3DMULTISAMPLE_NONE—Specifies nomultisamplingD3DMULTISAMPLE_1_SAMPLE…D3DMULTISAMPLE_16_SAMPLE—Specifiesmultisampling levels from 1 to 16 If you wish to include it, remember touse

The memory pool is specified by one of the members of theD3DPOOLenumerated type. The memory pools available are:D3DPOOL_DEFAULT—The default memory pool instructs Direct3D to place the resource in th

顶点格式To create a customvertex format, we first create a structure that holds the vertex data that wechoose.struct ColorVertex{float _x, _y, _z; //positionDWORD _color;};structNormalTexVer

三角形单元A triangle list contains the data for each individual triangle that we wish to draw. Vertex rect[6] = {v0, v1, v2, // triangle0v0, v2, v3}; // triangle1

世界坐标The world transformation is represented with a matrix and set with Direct3D using theIDirect3DDevice9::SetTransformmethod withD3DTS_WORLDas the transform type. For example, suppose we want to po

观察坐标系The view space transformation matrix can be computed using the following D3DX function:D3DXMATRIX*D3DXMatrixLookAtLH(D3DXMATRIX* pOut, //pointer to receive resulting view matrixCONST D3DX

投影D3DXMATRIX *D3DXMatrixPerspectiveFovLH(D3DXMATRIX* pOut, // returns projection matrixFLOAT fovY, // vertical field of view angle in radiansFLOAT Aspect, // aspect ratio = width / heightFLO

Acquiring anIDirect3D9 InterfaceThis is easily doneusing a special Direct3D function, as the following lines of code show:IDirect3D9*_d3d9;_d3d9 =Direct3DCreate9(D3D_SDK_VERSION); Checking f

初始化Direct3D通用框架The declaration of IDirect3DDevice9::Clearis:HRESULTIDirect3DDevice9::Clear(DWORD Count,const D3DRECT*pRects,DWORD Flags,D3DCOLOR Color,float Z,DWORD Stencil);Coun

背面消隐If for some reason we are not happy with the default culling behavior, we can change it by changing theD3DRS_CULLMODErender state. Device->SetRenderState(D3DRS_CULLMODE, Value); whereValueca

In the D3DX library, we can use theD3DXVECTOR3class to represent a vectorin 3-space. Its class definition is:typedef struct D3DXVECTOR3 : public D3DVECTOR {public:D3DXVECTOR3() {};D3DXVECTOR3(

D3DXMatricesTo represent 4×4 matrices in D3DX, weusethe D3DXMATRIX class, defined as follows:typedef struct D3DXMATRIX : publicD3DMATRIX{public:D3DXMATRIX() {};D3DXMATRIX(CONST FLOAT*);

Supposewe wish to check if a hardware device is capable of doing vertex processing inhardware (or in other words, whether the device supports transformation andlighting calculations in hardware). By

D3DX几何体对象The D3DX library provides the following six mesh creation functions:
D3DXCreateBox
D3DXCreateSphere
D3DXCreateCylinder
D3DXCreateTeapot
D3DXCreatePolygon
D3DXCreateTor