CompuServe Messages

Brian – The "MCS" or Model Coordinate System is the coordinate system that a block's defining entities are expressed in. So, if you have a circle with a center at 2,2 in a block definition, that coordinate is in MCS coordinates, and it is translated to WCS coordinates by applying the transformation matrix that describes the rotation and translation that must be applied to the MCS coord's, to compute the WCS coordinates. The WCS is the world coordinate system. The (trans) function doesn't convert from MCS->WCS, but can be used to convert from WCS to MCS coordinates, by first converting to the ECS of a block insert- ion, and then scaling the coordinates by the recipricol of the insertion scale factor(s). -TonyT.