hge source explor 0xA graphics Ⅰ

Graphics

　　在这一部分完成初始化DX，并且完成固定流水线，然后在进行渲染。

　　在这一部分会用到的数据结构和参数有：

　　参数：

D3DPRESENT_PARAMETERS*  d3dpp;

    D3DPRESENT_PARAMETERS   d3dppW;
    D3DPRESENT_PARAMETERS   d3dppFS;

    IDirect3D8*                pD3D;
    IDirect3DDevice8*        pD3DDevice;
    IDirect3DVertexBuffer8*    pVB;
    IDirect3DIndexBuffer8*    pIB;

    IDirect3DSurface8*    pScreenSurf;
    IDirect3DSurface8*    pScreenDepth;
    CRenderTargetList*    pTargets;
    CRenderTargetList*    pCurTarget;

    D3DXMATRIX            matView;
    D3DXMATRIX            matProj;

    CTextureList*        textures;
    hgeVertex*            VertArray;

    int                    nPrim;
    int                    CurPrimType;
    int                    CurBlendMode;
    HTEXTURE            CurTexture;

　　其中还有这些结构：

　　hgevertex

/*
** HGE Vertex structure
*/
struct hgeVertex
{
    float            x, y;        // screen position    
    float            z;            // Z-buffer depth 0..1
    DWORD            col;        // color
    float            tx, ty;        // texture coordinates
};

//对应的定点设置
#define D3DFVF_HGEVERTEX (D3DFVF_XYZ | D3DFVF_DIFFUSE | D3DFVF_TEX1)
#define VERTEX_BUFFER_SIZE 4000

 　　

CRenderTargetList

struct CRenderTargetList
{
    int                    width;
    int                    height;
    IDirect3DTexture8*    pTex;
    IDirect3DSurface8*    pDepth;
    CRenderTargetList*    next;
};

CTextureList

struct CTextureList
{
    HTEXTURE            tex;
    int                    width;
    int                    height;
    CTextureList*        next;
};

 渲染的图元

/*
** HGE Primitive type constants
*/
#define HGEPRIM_LINES        2
#define HGEPRIM_TRIPLES        3
#define HGEPRIM_QUADS        4


/*
** HGE Vertex structure
*/
struct hgeVertex
{
    float            x, y;        // screen position    
    float            z;            // Z-buffer depth 0..1
    DWORD            col;        // color
    float            tx, ty;        // texture coordinates
};


/*
** HGE Triple structure
*/
struct hgeTriple
{
    hgeVertex        v[3];
    HTEXTURE        tex;
    int                blend;
};


/*
** HGE Quad structure
*/
struct hgeQuad
{
    hgeVertex        v[4];
    HTEXTURE        tex;
    int                blend;
};

BLEND类型

/*
** HGE Blending constants
*/
#define    BLEND_COLORADD        1
#define    BLEND_COLORMUL        0
#define    BLEND_ALPHABLEND    2
#define    BLEND_ALPHAADD        0
#define    BLEND_ZWRITE        4
#define    BLEND_NOZWRITE        0

#define BLEND_DEFAULT        (BLEND_COLORMUL | BLEND_ALPHABLEND | BLEND_NOZWRITE)
#define BLEND_DEFAULT_Z        (BLEND_COLORMUL | BLEND_ALPHABLEND | BLEND_ZWRITE)