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<TITLE>Hardware Buffers In OGRE: Updating Index Buffers</TITLE>
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<H3> 2.7.2 Updating Index Buffers </H3>
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Updating index buffers can only be done when you lock the buffer for writing; See section <A HREF="vbo-update_7.html#SEC7">2.4 Locking buffers</A> for details. Locking returns a void pointer, which must be cast to the apropriate type; with index buffers this is either an unsigned short (for 16-bit indexes) or an unsigned long (for 32-bit indexes). For example:
<TABLE><tr><td> </td><td class=example><pre>unsigned short* pIdx = static_cast<unsigned short*>(ibuf->lock(HardwareBuffer::HBL_DISCARD));
</pre></td></tr></table>You can then write to the buffer using the usual pointer semantics, just remember to unlock the buffer when you're finished!
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