Hi, WLGfx
I have been working on Mike's tutorial. I’m not sure if any of this will help you. By adding three vertices and one primitive to his M2 – 003 example, I have made a plain object. Beyond this example I am lost. My mind not being what it once was, I don’t fully understand exactly what the indices are. This is my code for that.
#include <DarkGDK.h>
bool CreateNewObject ( int iID, LPSTR pName, int iFrame );
bool SetupStandardVertex ( DWORD dwFVF, BYTE* pVertex, int iOffset, float x, float y, float z, float nx, float ny, float nz, DWORD dwDiffuseColour, float tu, float tv );
bool SetupMeshFVFData ( sMesh* pMesh, DWORD dwFVF, DWORD dwVertexCount, DWORD dwIndexCount );
bool SetNewObjectFinalProperties ( int iID, float fRadius );
void SetTexture ( int iID, int iImage );
void DarkGDK ( void )
{
CreateNewObject ( 1, "Plain", 1 );
sObject* pObject = dbGetObject ( 1 );
sFrame* pFrame = pObject->pFrame;
sMesh* pMesh = pObject->pFrame->pMesh;
SetupMeshFVFData ( pMesh, D3DFVF_XYZ | D3DFVF_NORMAL | D3DFVF_TEX1 | D3DFVF_DIFFUSE, 6, 0 );
SetupStandardVertex (
pMesh->dwFVF,
pMesh->pVertexData,
0,
0.0f, 0.0f, 0.0f,
0.0f, 0.0f, -1.0f,
D3DCOLOR_ARGB ( 255, 255, 255, 255 ),
0.0f, 0.0f
);
SetupStandardVertex (
pMesh->dwFVF,
pMesh->pVertexData,
1,
1.0f, 1.0f, 0.0f,
0.0f, 0.0f, -1.0f,
D3DCOLOR_ARGB ( 255, 255, 255, 255 ),
0.0f, 0.0f
);
SetupStandardVertex (
pMesh->dwFVF,
pMesh->pVertexData,
2,
1.0f, 0.0f, 0.0f,
0.0f, 0.0f, -1.0f,
D3DCOLOR_ARGB ( 255, 255, 255, 255 ),
0.0f, 0.0f
);
SetupStandardVertex (
pMesh->dwFVF,
pMesh->pVertexData,
3,
0.0f, 0.0f, 0.0f,
0.0f, 0.0f, -1.0f,
D3DCOLOR_ARGB ( 255, 255, 255, 255 ),
0.0f, 0.0f
);
SetupStandardVertex (
pMesh->dwFVF,
pMesh->pVertexData,
4,
0.0f, 1.0f, 0.0f,
0.0f, 0.0f, -1.0f,
D3DCOLOR_ARGB ( 255, 255, 255, 255 ),
0.0f, 0.0f
);
SetupStandardVertex (
pMesh->dwFVF,
pMesh->pVertexData,
5,
1.0f, 1.0f, 0.0f,
0.0f, 0.0f, -1.0f,
D3DCOLOR_ARGB ( 255, 255, 255, 255 ),
0.0f, 0.0f
);
pMesh->iPrimitiveType = D3DPT_TRIANGLELIST;
pMesh->iDrawVertexCount = 6;
pMesh->iDrawPrimitives = 2;
SetNewObjectFinalProperties ( 1, 0.0f );
SetTexture ( 1, 0 );
while ( LoopGDK ( ) )
{
if ( dbSpaceKey ( ) )
{
dbColorObject ( 1, dbRgb ( 0, 255, 0 ) );
dbSetObjectCull ( 1, 0 );
dbTurnObjectLeft ( 1, 1.0f );
}
dbSync ( );
}
}
While browsing DBPro’s source code, I came across the MakeCone function. Although this is already implemented in DGDK, I added a slightly modified function to my source. This function uses indices, but I still can’t seem to grasp them.
Help, please!
void MakeCone1 ( int iID, float fSize )
{
// make a cone
// create a new object
CreateNewObject ( iID, "cone", 1 );
float fHeight = fSize;
int iSegments = 11;
// correct cone size
fSize/=2.0f;
// setup general object data
sObject* pObject = dbGetObject ( iID );
sFrame* pFrame = pObject->pFrame;
sMesh* pMesh = pObject->pFrame->pMesh;
// create vrtex memory
DWORD dwVertexCount = (iSegments * 2) + 1; // store number of vertices
DWORD dwIndexCount = iSegments * 3; // store number of indices
SetupMeshFVFData ( pMesh, D3DFVF_XYZ | D3DFVF_NORMAL | D3DFVF_TEX1, dwVertexCount, dwIndexCount );
float fDeltaSegAngle = ( (2.0f * D3DX_PI) / iSegments );
float fSegmentLength = 1.0f / ( float ) iSegments;
float fy0 = ( 90.0f - ( float ) D3DXToDegree ( atan ( fHeight / fSize ) ) ) / 90.0f;
int iVertex = 0;
int iIndex = 0;
WORD wVertexIndex = 0;
// for each segment, add a triangle to the sides triangle list
for ( int iCurrentSegment = 0; iCurrentSegment <= iSegments; iCurrentSegment++ )
{
float x0 = fSize * sinf ( iCurrentSegment * fDeltaSegAngle );
float z0 = fSize * cosf ( iCurrentSegment * fDeltaSegAngle );
// Calculate normal
D3DXVECTOR3 Normal = D3DXVECTOR3 ( x0, fy0, z0 );
D3DXVec3Normalize ( &Normal, &Normal );
// not the last segment though
if ( iCurrentSegment < iSegments )
{
// set vertex A
SetupStandardVertex ( pMesh->dwFVF, pMesh->pVertexData, iVertex, 0.0f, 0.0f+(fHeight/2.0f), 0.0f, Normal.x, Normal.y, Normal.z, D3DCOLOR_ARGB ( 255, 255, 255, 255 ), 1.0f - ( fSegmentLength * ( float ) iCurrentSegment ), 0.0f );
// increment vertex index
iVertex++;
// set vertex B
SetupStandardVertex ( pMesh->dwFVF, pMesh->pVertexData, iVertex, x0, 0.0f-(fHeight/2.0f), z0, Normal.x, Normal.y, Normal.z, D3DCOLOR_ARGB ( 255, 255, 255, 255 ), 1.0f - ( fSegmentLength * ( float ) iCurrentSegment ), 1.0f );
// increment vertex index
iVertex++;
}
else
{
// set last vertex
SetupStandardVertex ( pMesh->dwFVF, pMesh->pVertexData, iVertex, x0, 0.0f - ( fHeight / 2.0f ), z0, Normal.x, Normal.y, Normal.z, D3DCOLOR_ARGB ( 255, 255, 255, 255 ), 0.0f, 1.0f );
// increment vertex index
iVertex++;
}
// not the last segment though
if ( iCurrentSegment < iSegments )
{
// set three indices per segment
pMesh->pIndices [ iIndex ] = wVertexIndex;
iIndex++;
wVertexIndex++;
pMesh->pIndices [ iIndex ] = wVertexIndex;
iIndex++;
if ( iCurrentSegment == iSegments-1 )
wVertexIndex += 1;
else
wVertexIndex += 2;
pMesh->pIndices [ iIndex ] = wVertexIndex;
iIndex++;
wVertexIndex--;
}
}
// setup mesh drawing properties
pMesh->iPrimitiveType = D3DPT_TRIANGLELIST;
pMesh->iDrawVertexCount = ( iSegments * 2 ) + 1;
pMesh->iDrawPrimitives = iSegments;
// setup new object and introduce to buffers
SetNewObjectFinalProperties ( iID, fSize );
// give the object a default texture
SetTexture ( iID, 0 );
}
