Used by the callback heightfield data type to sample a height for a
given cell position.
@param p_user_data User data specified when creating the dHeightfieldDataID
@param x The index of a sample in the local x axis. It is a value
in the range zero to ( nWidthSamples - 1 ).
@param x The index of a sample in the local z axis. It is a value
in the range zero to ( nDepthSamples - 1 ).
@return The sample height which is then scaled and offset using the
values specified when the heightfield data was created.
@brief Callback prototype
Used by the callback heightfield data type to sample a height for a given cell position.
@param p_user_data User data specified when creating the dHeightfieldDataID @param x The index of a sample in the local x axis. It is a value in the range zero to ( nWidthSamples - 1 ). @param x The index of a sample in the local z axis. It is a value in the range zero to ( nDepthSamples - 1 ).
@return The sample height which is then scaled and offset using the values specified when the heightfield data was created.
@ingroup collide