newbie question adding transparency using water example
Author
hi all, i am using the old water demo from first dx9sdk
my problem is, how can i add some alpha to it to make
the ground under water a bit visible..
(without alpha tansparency it works perfect)
when adding "diffuse" i get lot of errors in graphic
original ->
struct VERTEX
{
D3DXVECTOR3 p;
FLOAT tu, tv;
static const DWORD FVF;
};
const DWORD VERTEX::FVF = D3DFVF_XYZ | D3DFVF_TEX1;
my try ->
struct VERTEX
{
D3DXVECTOR3 p;
FLOAT tu, tv;
DWORD color;
static const DWORD FVF;
};
const DWORD VERTEX::FVF = D3DFVF_XYZ | D3DFVF_TEX1 | D3DFVF_DIFFUSE;
in the function
HRESULT SetEMBMStates()
{
...
}
i didnt found anything that helps
maybe in that function:
D3DVERTEXELEMENT9 decl[] =
{
{ 0, 0, D3DDECLTYPE_FLOAT3, D3DDECLMETHOD_DEFAULT, D3DDECLUSAGE_POSITION, 0 },
{ 0, 12, D3DDECLTYPE_FLOAT2, D3DDECLMETHOD_DEFAULT, D3DDECLUSAGE_TEXCOORD, 0 },
D3DDECL_END()
};
but i dont know much about vertex/pixel shaders..
i hope that somebody understand my problem
and/or know what to do with that
can anybody help me please
greeting aragon
Two things that jump to mind.
One:
I'm no expert, so maybe you are doing it correctly, but my struct always matches my FVF. In your case you have an extra "static cons DWORD FVF"
I assume when you create your vertex buffer you are doing something like
.. sizeof(struct VERTEX)
but I think that would be wrong given the FVF you are using unless it's something specific to c# vs c++.
Second, if you do use a D3DFVF_DIFFUSE value, you'll also need to set your texture stages:
something like this might work (it's what I'm using for my water:
BOL
One:
Quote:
struct VERTEX
{
D3DXVECTOR3 p;
FLOAT tu, tv;
static const DWORD FVF;
};
const DWORD VERTEX::FVF = D3DFVF_XYZ | D3DFVF_TEX1;
I'm no expert, so maybe you are doing it correctly, but my struct always matches my FVF. In your case you have an extra "static cons DWORD FVF"
I assume when you create your vertex buffer you are doing something like
.. sizeof(struct VERTEX)
but I think that would be wrong given the FVF you are using unless it's something specific to c# vs c++.
Second, if you do use a D3DFVF_DIFFUSE value, you'll also need to set your texture stages:
something like this might work (it's what I'm using for my water:
pd3dDevice->SetTextureStageState( 0, D3DTSS_COLOROP, D3DTOP_SELECTARG1 );pd3dDevice->SetTextureStageState( 0, D3DTSS_COLORARG1, D3DTA_TEXTURE );pd3dDevice->SetTextureStageState( 0, D3DTSS_COLORARG2, D3DTA_DIFFUSE );pd3dDevice->SetTextureStageState( 0, D3DTSS_ALPHAOP, D3DTOP_SELECTARG1 );pd3dDevice->SetTextureStageState( 0, D3DTSS_ALPHAARG1, D3DTA_DIFFUSE );pd3dDevice->SetSamplerState(0, D3DSAMP_ADDRESSU, D3DTADDRESS_WRAP);pd3dDevice->SetSamplerState(0, D3DSAMP_ADDRESSV, D3DTADDRESS_WRAP);pd3dDevice->SetRenderState(D3DRS_ALPHABLENDENABLE, TRUE);BOL
Author
thx for answer
1.
the diffuse i was adding works at landscape and other vertex buffer things perfect, only at this water thing the problem appears
and 2.
the texture stages are set correctly, there is no problem
the problem is that without "diffus" i got
water mirror waves looking very very great, but cant watch
throu water to see the ground
when adding the diffuse ,the water waves turn into
long lines, so that something get in trouble
i think that the diffus value collides with something in
vertex shader maybe because of any static constant i didnt
understand, like that vertex shader except a fix size of
p ..and when adding extra value it overwrites other values
or something like that
1.
the diffuse i was adding works at landscape and other vertex buffer things perfect, only at this water thing the problem appears
and 2.
the texture stages are set correctly, there is no problem
the problem is that without "diffus" i got
water mirror waves looking very very great, but cant watch
throu water to see the ground
when adding the diffuse ,the water waves turn into
long lines, so that something get in trouble
i think that the diffus value collides with something in
vertex shader maybe because of any static constant i didnt
understand, like that vertex shader except a fix size of
p ..and when adding extra value it overwrites other values
or something like that
oh, I didn't realize you already had a vertex shader in use. When I use a vertex shader I put the alpha in the shader. In my case, I use a shader for my terrain which has 5 textures, texture 0 is a 4 color blend map (ARGB). Then texture 1-4 is the texture to render:
Shader=
I think without too much work you can rework it to use an alpha channel in the texture maybe?
Shader=
ps_1_4////////////////////////////////// r0: alphamaps// r1 - r4: textures////////////////////////////////// Sample texturestexld r0, t0texld r1, t1texld r2, t1texld r3, t1texld r4, t1// Combine textures together based off of their alphamapsmul r1, r1, r0.xlrp r2, r0.y, r2, r1lrp r3, r0.z, r3, r2lrp r0, r0.w, r4, r3I think without too much work you can rework it to use an alpha channel in the texture maybe?
Author
that is my water from dx9 sdk working very well
but without transparency
but without transparency
FILE: BUMPWAVES.VSHvs.1.1dcl_position v0dcl_texcoord v1m4x4 oPos, v0, c3 ; transform position to the projection space; Compute vertex position in the camera space - this is our texture coordinatesdp4 r0.x, v0, c0 dp4 r0.y, v0, c1 dp4 r0.z, v0, c2 ; Do the rest of texture transform (first part was combined with the camera matrix) rcp r0.z, r0.z mad oT1.x, r0.x, r0.z, c8.x mad oT1.y, r0.y, r0.z, c8.y mov oT0.xy, v1 ; Copy input texture coordinates for the stage 0;----------------------------------------------------struct VERTEX{D3DXVECTOR3 p;FLOAT tu, tv;static const DWORD FVF;};const DWORD VERTEX::FVF = D3DFVF_XYZ | D3DFVF_TEX1;void render_water_bump(void){ if (water_run==0) return; D3DXMATRIX matTrans; D3DXMATRIX matRot; D3DXMATRIX matObj; D3DXMatrixTranslation( &matObj, unit_x[0], unit_y[0], unit_z[0] ); g_pd3dDevice->SetTransform( D3DTS_WORLD, &matObj ); // Render the water SetEMBMStates(); if( m_bUseVertexShader ) { g_pd3dDevice->SetVertexShader( m_pVertexShader ); g_pd3dDevice->SetVertexDeclaration( m_pVertexDeclaration ); } else { g_pd3dDevice->SetFVF( VERTEX::FVF ); } g_pd3dDevice->SetStreamSource( 0, m_pWaterVB, 0, sizeof(VERTEX) ); //testg_pd3dDevice->SetRenderState(D3DRS_SRCBLEND, itest[1]);g_pd3dDevice->SetRenderState(D3DRS_DESTBLEND, itest[2]);g_pd3dDevice->SetRenderState(D3DRS_ALPHABLENDENABLE, TRUE);g_pd3dDevice->SetTextureStageState( 1, D3DTSS_COLOROP, D3DTOP_SELECTARG1 );g_pd3dDevice->SetTextureStageState( 1, D3DTSS_COLORARG1, D3DTA_TEXTURE );g_pd3dDevice->SetTextureStageState( 1, D3DTSS_COLORARG2, D3DTA_DIFFUSE );g_pd3dDevice->SetTextureStageState( 1, D3DTSS_ALPHAOP, D3DTOP_SELECTARG1 );g_pd3dDevice->SetTextureStageState( 1, D3DTSS_ALPHAARG1, D3DTA_DIFFUSE ); g_pd3dDevice->SetTexture ( 1, g_pDynamicTexture ); g_pd3dDevice->DrawPrimitive( D3DPT_TRIANGLELIST, 0, m_nTriangles ); g_pd3dDevice->SetTexture ( 1, g_pTexture[1] ); //reset g_pd3dDevice->SetTextureStageState( 0, D3DTSS_COLORARG1, D3DTA_TEXTURE ); g_pd3dDevice->SetTextureStageState( 0, D3DTSS_COLOROP, D3DTOP_SELECTARG1 ); g_pd3dDevice->SetTextureStageState( 1, D3DTSS_COLOROP, D3DTOP_DISABLE ); g_pd3dDevice->SetSamplerState( 0, D3DSAMP_ADDRESSU, D3DTADDRESS_WRAP ); g_pd3dDevice->SetSamplerState( 0, D3DSAMP_ADDRESSV, D3DTADDRESS_WRAP ); g_pd3dDevice->SetSamplerState( 1, D3DSAMP_ADDRESSU, D3DTADDRESS_WRAP ); g_pd3dDevice->SetSamplerState( 1, D3DSAMP_ADDRESSV, D3DTADDRESS_WRAP );}LPDIRECT3DTEXTURE9 CreateBumpMap( DWORD dwWidth, DWORD dwHeight,D3DFORMAT d3dBumpFormat ){ LPDIRECT3DTEXTURE9 psBumpMap; // Create the bump map texture if( FAILED( g_pd3dDevice->CreateTexture( dwWidth, dwHeight, 1, 0 /* Usage */, d3dBumpFormat, D3DPOOL_MANAGED, &psBumpMap, NULL ) ) ) return NULL; D3DLOCKED_RECT d3dlr; psBumpMap->LockRect( 0, &d3dlr, 0, 0 ); CHAR* pDst = (CHAR*)d3dlr.pBits; CHAR iDu, iDv; for( DWORD y=0; y<dwHeight; y++ ) { CHAR* pPixel = pDst; for( DWORD x=0; x<dwWidth; x++ ) { FLOAT fx = x/(FLOAT)dwWidth - 0.5f; FLOAT fy = y/(FLOAT)dwHeight - 0.2f; FLOAT r = sqrtf( fx*fx + fy*fy ); iDu = (CHAR)( 200.2 * cosf( 450.0f * ( fx + fy ) ) ); iDu += (CHAR)( 100.6 * cosf( 440.0f * ( fx * 0.85f - fy ) ) ); iDv = (CHAR)( 200.2 * sinf( 450.0f * ( fx +fx + fy ) ) ); iDv += (CHAR)( 100.6 * sinf( 440.0f * ( fx * 0.85f - fy ) ) ); *pPixel++ = iDu; *pPixel++ = iDv; } pDst += d3dlr.Pitch; } psBumpMap->UnlockRect(0); return psBumpMap;}void initShader( void ){pixel_shader=1;vertex_shader=1;m_bUseVertexShader = TRUE;//Prüfe Ob Vertex und Pixel Shader verfügbar sind //if (water_run==0) return;D3DCAPS9 caps;g_pd3dDevice->GetDeviceCaps(&caps); if ( caps.PixelShaderVersion < D3DPS_VERSION(1,1) ) pixel_shader=0;if ( caps.VertexShaderVersion < D3DPS_VERSION(1,1) ) {vertex_shader=0;m_bUseVertexShader = FALSE;}m_psBumpMap = CreateBumpMap( 512, 512, D3DFMT_V8U8 ); if( NULL == m_psBumpMap ) PostQuitMessage(0);SetEMBMStates();VERTEX* v; if( caps.TextureCaps & D3DPTEXTURECAPS_PROJECTED && !m_bUseVertexShader) { m_n = 32; // Number of vertices in the ground grid along X m_m = 32; // Number of vertices in the ground grid along Z } else { m_n = 32; // Number of vertices in the ground grid along X m_m = 32; // Number of vertices in the ground grid along Z } m_nTriangles = (m_n-1)*(m_m-1)*2; // Number of triangles in the ground // Create a square grid m_n*m_m for rendering the water if( FAILED( g_pd3dDevice->CreateVertexBuffer( m_nTriangles*3*sizeof(VERTEX), D3DUSAGE_WRITEONLY, VERTEX::FVF, D3DPOOL_MANAGED, &m_pWaterVB, NULL ) ) ) return ; m_pWaterVB->Lock( 0, 0, (void**)&v, 0 ); float dX = 8000.0f/(m_n-1); float dZ = 8000.0f/(m_m-1); float x0 = -4000; float z0 = -4000; float dU = (400.0f/(m_n-1)); float dV = (400.0f/(m_m-1)); float yh=0; UINT k = 0; for (UINT z=0; z < (m_m-1); z++) { for (UINT x=0; x < (m_n-1); x++) { v[k].p = D3DXVECTOR3(x0 + x*dX, yh, z0 + z*dZ ); v[k].tu = x*dU; v[k].tv = z*dV; k++; v[k].p = D3DXVECTOR3(x0 + x*dX, yh, z0 + (z+1)*dZ ); v[k].tu = x*dU; v[k].tv = (z+1)*dV; k++; v[k].p = D3DXVECTOR3(x0 + (x+1)*dX, yh, z0 + (z+1)*dZ ); v[k].tu = (x+1)*dU; v[k].tv = (z+1)*dV; k++; v[k].p = D3DXVECTOR3(x0 + x*dX, yh, z0 + z*dZ ); v[k].tu = x*dU; v[k].tv = z*dV; k++; v[k].p = D3DXVECTOR3(x0 + (x+1)*dX, yh, z0 + (z+1)*dZ ); v[k].tu = (x+1)*dU; v[k].tv = (z+1)*dV; k++; v[k].p = D3DXVECTOR3(x0 + (x+1)*dX, yh, z0 + z*dZ ); v[k].tu = (x+1)*dU; v[k].tv = z*dV; k++; } } m_pWaterVB->Unlock(); if ( m_bUseVertexShader ) { D3DVERTEXELEMENT9 decl[] = { { 0, 0, D3DDECLTYPE_FLOAT3, D3DDECLMETHOD_DEFAULT, D3DDECLUSAGE_POSITION, 0 }, { 0, 12, D3DDECLTYPE_FLOAT2, D3DDECLMETHOD_DEFAULT, D3DDECLUSAGE_TEXCOORD, 0 }, D3DDECL_END() }; if( FAILED( hr = g_pd3dDevice->CreateVertexDeclaration( decl, &m_pVertexDeclaration ) ) ) { return ; } LPD3DXBUFFER pCode = NULL; if( FAILED( hr = D3DXAssembleShaderFromFile( "BumpWaves.vsh", NULL, NULL, 0, &pCode, NULL ) ) ) { PostQuitMessage(0); return ; } if( FAILED( hr = g_pd3dDevice->CreateVertexShader( (DWORD*)pCode->GetBufferPointer(), &m_pVertexShader ) ) ) { PostQuitMessage(0); return ; } pCode->Release(); } D3DXMATRIXA16 matWorld, matView, matProj; // Set the transform matrices D3DXVECTOR3 vEyePt( 1600*sin(c360*3.141593/180), 400.0f, 1600*cos(c360*3.141593/180) ); D3DXVECTOR3 vLookatPt( 0.0f, 0.0f, 0.0f ); D3DXVECTOR3 vUpVec( 0.0f, 1.0f, 0.0f ); D3DXMatrixIdentity( &matWorld ); D3DXMatrixLookAtLH( &matView, &vEyePt, &vLookatPt, &vUpVec ); D3DXMatrixPerspectiveFovLH( &matProj, 1.00f, 1.0f, 0.01f, 10000.0f ); g_pd3dDevice->SetTransform( D3DTS_WORLD, &matWorld ); g_pd3dDevice->SetTransform( D3DTS_VIEW, &matView ); g_pd3dDevice->SetTransform( D3DTS_PROJECTION, &matProj ); if ( m_bUseVertexShader ) { D3DXMATRIXA16 matCamera, matFinal; D3DXMatrixMultiply( &matCamera, &matWorld, &matView ); D3DXMatrixMultiply( &matFinal, &matCamera, &matProj ); D3DXMatrixTranspose(&matCamera, &matCamera); D3DXMatrixTranspose(&matFinal, &matFinal); matCamera(0, 0) *= 0.8f; matCamera(0, 1) *= 0.8f; matCamera(0, 2) *= 0.8f; matCamera(0, 3) *= 0.8f; matCamera(1, 0) *= 0.8f; matCamera(1, 1) *= 0.8f; matCamera(1, 2) *= 0.8f; matCamera(1, 3) *= 0.8f; if (FAILED( hr = g_pd3dDevice->SetVertexShaderConstantF(0, (float*)&matCamera, 3) ) ) { return ; } if (FAILED( hr = g_pd3dDevice->SetVertexShaderConstantF(3, (float*)&matFinal, 4) ) ) { return ; } FLOAT data[4] = {0.5f, -0.5f, 0, 0}; if (FAILED( hr = g_pd3dDevice->SetVertexShaderConstantF(8, (float*)data, 1) ) ) { return ; } } D3DXMatrixIdentity( &m_matBumpMat ); g_pd3dDevice->SetSamplerState( 0, D3DSAMP_ADDRESSU, D3DTADDRESS_WRAP ); g_pd3dDevice->SetSamplerState( 0, D3DSAMP_ADDRESSV, D3DTADDRESS_WRAP ); }This topic is closed to new replies.
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