How do you initialize the vertex buffer and index buffer for a cone in DirectX 9 in C++?
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How do you initialize the vertex buffer and index buffer for a cone in DirectX 9 in C++?
Well its fairly easy.
A cone has a single point at one end.
At the other end you have a circle. Obviously the more points you have in that circle the more circular it looks.
You can plot a circle using
To make any triangle you can do it by plugging theta and theta plus some small epsilon (2Pi / 60 would give you 60 points round the base of the cone). Your final coordinate is the top 1. Bung each set of the 3 indices into an index buffer and you are good to go.