I have created a piece of wireframe terrain.Now I want to put a textue on the terrain.I tried,but failed.After I ran my code,there is only wireframe,no texture.There are no errors in the output window.I think something wrong in my code,which it's hard for me to find.Could any one help me check some of my code.
The following is the vetex structure:
struct Vertex
{
Vertex(){}
Vertex(float x,float y,float z,float u,float v)
{
_x=x,_y=y,_z=z,_u=u,_v=v;
}
float _x,_y,_z;
float _u,_v;
static const DWORD FVF;
};
create vertex buffer:
bool Terrain::computeVertices()
{
HRESULT hr = 0;
hr = m_pDevice->CreateVertexBuffer(_numVertices*sizeof(Vertex),D3DUSAGE_WRITEONLY,Vertex::FVF,D3DPOOL_MANAGED,&m_pVB,0);
if(FAILED(hr))
return false;
int startX = -_width/2;//set piont (0,0) the center of the terrain
int startZ = _depth/2;
int endX = _width/2;
int endZ = -_depth/2;
float uCoordIncrementSize = 1.0f/(float)_numCellsPerRow;//compute the increment size of texture coordinates
float vCoordIncrementSize = 1.0f/(float)_numCellsPerCol;//from one vertex to the next
Vertex* v = 0;
m_pVB->Lock(0,0,(void**)&v,0);
int i = 0;
for(int z = startZ;z>=endZ;z-=_cellSpacing)//
{
int j = 0;
for(int x = startX;x<=endX;x+=_cellSpacing)
{
int index = i*_numVertsPerRow+j;//give every vertex its coordinate
v[index] = Vertex((float)x,(float)0,(float)z,(float)j*uCoordIncrementSize,(float)i*vCoordIncrementSize);
j++;
}
i++;
}
m_pVB->Unlock();
return true;
}
create index buffer:
bool Terrain::computeIndices()
{
HRESULT hr = 1;
hr = m_pDevice->CreateIndexBuffer(3*_numTriangles*sizeof(WORD),D3DUSAGE_WRITEONLY,D3DFMT_INDEX16,D3DPOOL_MANAGED,&m_pIB,0);//
if(FAILED(hr))
return false;
WORD* indices =0;
m_pIB->Lock(0,0,(void**)&indices,0);
int baseIndex = 0;
for(int i = 0;i<_numCellsPerCol;i++)
{
for(int j = 0;j<_numCellsPerRow;j++)//assign every vertex a number,weave tiangles
{
indices[baseIndex] = i*_numVertsPerRow+j;
indices[baseIndex+1] = i*_numVertsPerRow+j+1;
indices[baseIndex+2] = (i+1)*_numVertsPerRow+j;
indices[baseIndex+3] = (i+1)*_numVertsPerRow+j;
indices[baseIndex+4] = i*_numVertsPerRow+j+1;
indices[baseIndex+5] = (i+1)*_numVertsPerRow+j+1;
baseIndex +=6;
}
}
m_pIB->Unlock();
return true;
}
render function for terrain:
bool Terrain::Render()
{
m_pDevice->SetStreamSource( 0,m_pVB,0,sizeof(Vertex) );
m_pDevice->SetIndices( m_pIB );
m_pDevice->SetFVF(Vertex::FVF);
m_pDevice->DrawIndexedPrimitive(D3DPT_TRIANGLELIST,0,0,_numVertices,0,_numTriangles);//
return true;
}
use the bmp file to create a texture,the following function is called by the terrain structure function:
bool Terrain::createTexture()
{
HRESULT hr = 0;
hr = D3DXCreateTextureFromFile(m_pDevice,"Grass.bmp",&pTex);
if(FAILED(hr))
return false;
m_pDevice->SetTexture(0,pTex);
m_pDevice->SetSamplerState(0,D3DSAMP_MAGFILTER,D3DTEXF_LINEAR);
m_pDevice->SetSamplerState(0,D3DSAMP_MINFILTER,D3DTEXF_LINEAR);
m_pDevice->SetSamplerState(0,D3DSAMP_MIPFILTER,D3DTEXF_POINT);
return true;
}
The following sentence is written in the file which the main function is:
const DWORD Terrain::Vertex::FVF = D3DFVF_XYZ|D3DFVF_TEX1;
The lighting is turned off,the zbuffer turned on, cull mode default.
Thank you advanced.
[Edited by - showin on June 8, 2007 9:14:40 AM]
