I have been working on a class that loads terrain from a heigtmap. (using the two kings tutorial) and when I run it I get
this rather than what I should be getting,
this.
Parts of the terrain are rendered above the rest but they seem to be the right shape... strange.
This is the code I use to load the heightmap:
// defines //
#define CTERRAIN_X 64
#define CTERRAIN_Y 64
#define D3DFVF_CTERRAINVERTEX ( D3DFVF_XYZ | D3DFVF_DIFFUSE )
// structs //
struct sTerrainVertex
{
float fX, fY, fZ;
int dwColor;
};
// class //
class cTerrain
{
private:
LPDIRECT3DVERTEXBUFFER9 m_d3dVB;
LPDIRECT3DINDEXBUFFER9 m_d3dIB;
int m_vertexNum, m_primitiveNum;
LPDIRECT3DDEVICE9 m_device;
public:
void Init( LPDIRECT3DDEVICE9 device, HWND hWnd );
void Render();
};
void cTerrain::Init(LPDIRECT3DDEVICE9 device, HWND hWnd)
{
m_device = device;
m_d3dVB = NULL;
m_d3dIB = NULL;
m_vertexNum = ( CTERRAIN_X + 1 ) * ( CTERRAIN_Y + 1 );
m_primitiveNum = CTERRAIN_X * CTERRAIN_Y * 2;
char heightMap[CTERRAIN_X+1][CTERRAIN_Y+1];
sTerrainVertex *vertexData;
short *indexData;
std::ifstream file;
file.open("heightmap.raw",std::ios::binary );//open the hightmap file
//read in the data
for( unsigned y = 0; y < (CTERRAIN_Y + 1); ++y )
{
for( unsigned x = 0; x < (CTERRAIN_X + 1); ++x )
{
file.get(heightMap[x][y]);
}
}
file.close(); //close file
device->CreateVertexBuffer( sizeof( sTerrainVertex ) * m_vertexNum, D3DUSAGE_WRITEONLY,
D3DFVF_CTERRAINVERTEX, D3DPOOL_MANAGED, &m_d3dVB, NULL );
m_d3dVB->Lock( 0, 0, (void**)&vertexData, 0 );
for( y = 0; y < (CTERRAIN_Y + 1); ++y )
{
for( unsigned x = 0; x < (CTERRAIN_X + 1); ++x )
{
vertexData[x + y * (CTERRAIN_X + 1)].fX = (float)x;
vertexData[x + y * (CTERRAIN_X + 1)].fY = (float)y;
vertexData[x + y * (CTERRAIN_X + 1)].fZ = (float)heightMap[x][y] / 15.0f;
vertexData[x + y * (CTERRAIN_X + 1)].dwColor = 0xffffffff;
}
}
m_d3dVB->Unlock();
// create and fill index buffer
// NOTE: read up on IBs
device->CreateIndexBuffer( sizeof(short) * m_primitiveNum * 3, D3DUSAGE_WRITEONLY, D3DFMT_INDEX16,
D3DPOOL_MANAGED, &m_d3dIB ,NULL );
m_d3dIB->Lock(0, 0, (void**)&indexData, 0 );
for(y = 0;y < CTERRAIN_Y;++y)
{
for(unsigned x = 0;x < CTERRAIN_X;++x)
{
*indexData++ = x + y * (CTERRAIN_X + 1);
*indexData++ = x + 1 + y * (CTERRAIN_X + 1);
*indexData++ = x + 1 + (y + 1) * (CTERRAIN_X + 1);
*indexData++ = x + y * (CTERRAIN_X + 1);
*indexData++ = x + 1 + (y + 1) * (CTERRAIN_X + 1);
*indexData++ = x + (y + 1) * (CTERRAIN_X + 1);
}
}
m_d3dIB->Unlock();
}
void cTerrain::Render()
{
m_device->SetStreamSource(0,m_d3dVB,0,sizeof(sTerrainVertex));
m_device->SetIndices(m_d3dIB);
m_device->SetFVF( D3DFVF_CTERRAINVERTEX );
m_device->DrawIndexedPrimitive(D3DPT_TRIANGLELIST,0,0,m_vertexNum,0,m_primitiveNum );
}
( almost identical to the two kings code at the moment )
Any Ideas?
( using DX9 and MSVC++ 7 )
[edited by - PenTen on March 27, 2004 3:21:28 PM]
. Everything works nicely now, I even have some good flat depressions for water or whatever. 
