使用ＤＸ实现水的效果

#include ".\water.h" CWater::CWater(LPDIRECT3DDEVICE9 pD3DDevice) { m_pd3dDevice = pD3DDevice; m_pBufferWater = NULL; m_num = 0.0f; } CWater::~CWater(void) { } HRESULT CWater::InitVB() { if(FAILED(m_pd3dDevice->CreateVertexBuffer(4*sizeof(WATERVERTEX) ,0 ,D3DFVF_WATERVERTEX ,D3DPOOL_DEFAULT ,&m_pBufferWater ,NULL))) { return E_FAIL; } WATERVERTEX* pVertices; if(FAILED(m_pBufferWater->Lock(0, 4*sizeof(WATERVERTEX),(void**)&pVertices, 0))) { return E_FAIL; } //初始化地面的顶点缓冲区 pVertices->position = D3DXVECTOR3(-12.0f, 0.0f, -12.0f); pVertices->color = D3DCOLOR_ARGB(0,255,0,0); pVertices->tu = 0.0f; pVertices->tv = 20.0f; pVertices->tu1 = 0.0f; pVertices->tv1 = 20.0f; pVertices++; pVertices->position = D3DXVECTOR3(-12.0f, 0.0f, 10.0f); pVertices->color = D3DCOLOR_ARGB(0,255,0,0); pVertices->tu = 0.0f; pVertices->tv = 0.0f; pVertices->tu1 = 0.0f; pVertices->tv1 = 0.0f; pVertices++; pVertices->position = D3DXVECTOR3(10.0f, 0.0f, -12.0f); pVertices->color = D3DCOLOR_ARGB(0,255,0,0); pVertices->tu = 20.0f; pVertices->tv = 20.0f; pVertices->tu1 = 20.0f; pVertices->tv1 = 20.0f; pVertices++; pVertices->position = D3DXVECTOR3(10.0f, 0.0f, 10.0f); pVertices->color = D3DCOLOR_ARGB(0,255,0,0); pVertices->tu = 20.0f; pVertices->tv = 0.0f; pVertices->tu1 = 20.0f; pVertices->tv1 = 0.0f; pVertices++; m_pBufferWater->Unlock(); return S_OK; } void CWater::SetCamera() { D3DXMATRIX matView; D3DXMatrixLookAtLH(&matView, &m_Camera.g_vPos, &m_Camera.g_vViewAt, &m_Camera.g_vUp); m_pd3dDevice->SetTransform(D3DTS_VIEW,&matView); D3DXMATRIX matProj; D3DXMatrixPerspectiveFovLH(&matProj, D3DX_PI/2, 1.0f,1.0f,100.0f); m_pd3dDevice->SetTransform(D3DTS_PROJECTION,&matProj); } bool CWater::SetTexture(const char *FileTexture, int flag) { if(FAILED(D3DXCreateTextureFromFile(m_pd3dDevice, FileTexture, &m_pTexture[flag]))) { return false; } return true; } void CWater::SetLight() { //设置光源属性 D3DLIGHT9 light; ZeroMemory(&light,sizeof(D3DLIGHT9)); light.Type=D3DLIGHT_POINT; light.Ambient.r=0.1; light.Ambient.b=0.1; light.Ambient.g=0.1; light.Diffuse.r=1.0; light.Diffuse.g=1.0; light.Diffuse.b=1.0; light.Specular.r=0.0; light.Specular.g=0.0; light.Specular.b=0.0; light.Position.x=0.0; light.Position.y=10.0; light.Position.z=0.0; light.Range = 50.0f; light.Attenuation0=1; light.Attenuation1=0; light.Attenuation2=0; m_pd3dDevice->SetLight(0,&light); m_pd3dDevice->LightEnable(0,TRUE); m_pd3dDevice->SetRenderState(D3DRS_LIGHTING,FALSE); m_pd3dDevice->SetRenderState(D3DRS_AMBIENT,D3DCOLOR_XRGB(64, 64, 64)); } void CWater::SetMaterial() { D3DMATERIAL9 mtrl; mtrl.Diffuse.r = mtrl.Ambient.r = 0.0f; mtrl.Diffuse.g = mtrl.Ambient.g = 0.5f; mtrl.Diffuse.b = mtrl.Ambient.b = 1.0f; mtrl.Diffuse.a = mtrl.Ambient.a = 0.3f; ; m_pd3dDevice->SetMaterial(&mtrl); } void CWater::Render() { m_Camera.ProcInput(); SetCamera(); SetLight(); SetMaterial(); float TimeFactor = (float)(timeGetTime() / 1000.0f); D3DXMATRIX matTexture; D3DXMatrixTranslation(&matTexture, 0.0f, -TimeFactor, 0.0f); //因为是二维纹理的变换所以实现。所以要把4*4的矩阵转换成 //3*3的矩阵 Matrix4x4To3x3(&matTexture, &matTexture); //平移纹理坐标，自动达到卷轴的效果 m_pd3dDevice->SetTransform(D3DTS_TEXTURE0, &matTexture); //以2维纹理的形式输出 m_pd3dDevice->SetTextureStageState(0, D3DTSS_TEXTURETRANSFORMFLAGS,D3DTTFF_COUNT2); m_pd3dDevice->SetTexture(0,m_pTexture[0]); m_pd3dDevice->SetTextureStageState(0,D3DTSS_TEXCOORDINDEX,0); m_pd3dDevice->SetRenderState(D3DRS_ALPHABLENDENABLE,false); //多层纹理混合 D3DCAPS9 caps; m_pd3dDevice->GetDeviceCaps(&caps); int num = caps.MaxTextureBlendStages; if(num > 1) { m_pd3dDevice->SetTexture(1,m_pTexture[1]); m_pd3dDevice->SetTextureStageState(1,D3DTSS_COLOROP, D3DTOP_SUBTRACT); m_pd3dDevice->SetTextureStageState(1,D3DTSS_COLORARG1,D3DTA_TEXTURE); m_pd3dDevice->SetTextureStageState(1,D3DTSS_COLORARG2,D3DTA_CURRENT); m_pd3dDevice->SetTextureStageState(1,D3DTSS_TEXCOORDINDEX,1); D3DXMatrixTranslation(&matTexture, 0.0f, TimeFactor, 0.0f); Matrix4x4To3x3(&matTexture, &matTexture); m_pd3dDevice->SetTransform(D3DTS_TEXTURE1, &matTexture); m_pd3dDevice->SetTextureStageState(1, D3DTSS_TEXTURETRANSFORMFLAGS, D3DTTFF_COUNT2); } ////对第二层的纹理进行 alpha的混合。 用纹理图中的alpha通道 m_pd3dDevice->SetTextureStageState(1, D3DTSS_ALPHAOP, D3DTOP_SELECTARG2); m_pd3dDevice->SetTextureStageState(1, D3DTSS_ALPHAARG2, D3DTA_TEXTURE); m_pd3dDevice->SetRenderState(D3DRS_ALPHABLENDENABLE, TRUE); m_pd3dDevice->SetRenderState(D3DRS_SRCBLEND, D3DBLEND_SRCALPHA); m_pd3dDevice->SetRenderState(D3DRS_DESTBLEND, D3DBLEND_INVSRCALPHA); m_pd3dDevice->SetStreamSource(0, m_pBufferWater,0,sizeof(WATERVERTEX)); m_pd3dDevice->SetFVF(D3DFVF_WATERVERTEX); m_pd3dDevice->DrawPrimitive(D3DPT_TRIANGLESTRIP,0,2); // Turn off texture transformations m_pd3dDevice->SetTextureStageState(0,D3DTSS_TEXTURETRANSFORMFLAGS,D3DTTFF_DISABLE); } void CWater::Matrix4x4To3x3(D3DXMATRIX *matOut, D3DXMATRIX *matIn) { matOut->_11 = matIn->_11; // Copy over 1st row matOut->_12 = matIn->_12; matOut->_13 = matIn->_13; matOut->_14 = 0.0f; matOut->_21 = matIn->_21; // Copy over 2nd row matOut->_22 = matIn->_22; matOut->_23 = matIn->_23; matOut->_24 = 0.0f; matOut->_31 = matIn->_41; // Copy bottom row matOut->_32 = matIn->_42; // used for translation matOut->_33 = matIn->_43; matOut->_34 = 0.0f; matOut->_41 = 0.0f; // Clear the bottom row matOut->_42 = 0.0f; matOut->_43 = 0.0f; matOut->_44 = 1.0f; }