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Asked: 2026-05-21T09:59:40+00:00

I am trying to make a ball trail. rBallPos is correctly updating. Following code

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I am trying to make a ball trail.
rBallPos is correctly updating.
Following code is not working creating
a cylinder as ball’s trail. How to
solve it?

LPD3DXMESH /*ID3DXMesh*/ ppMeshCylinder = NULL;
hr = D3DXCreateCylinder(g_d3d_device,0.1f,0.1f,0.1f,1,1,&ppMeshCylinder,0);

hr is FAILED here also hr != D3D_OK

D3DXMATRIX cylinder, cylinder2, cylinderRotate, cylinderTrans;
D3DXMatrixRotationX(&cylinderRotate, 1.5f);
D3DXMatrixTranslation(&cylinderTrans, rBallPos.fX, rBallPos.fY, rBallPos.fZ);
D3DXMatrixMultiply(&cylinder, &cylinderRotate, &cylinderTrans);
g_d3d_device->SetTransform(D3DTS_WORLD, &cylinder);
ppMeshCylinder->DrawSubset(0);

Need help.

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1 Answer

  1. Editorial Team

    You need to pass in a pointer to LPD3DXMESH, so your mesh parameter should be &ppMeshCylinder instead of ppMeshCylinder. In fact, your compiler should have already warned you.

    Update: Try passing in a larger value for Slices and Stacks, say 5 or 10. It’s not possible to create a cylindrical mesh with just 1 polygon.

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