To perform the automatic designing economically with rapidity and high reliability by providing a step to partially change stored sets of data for defining the solid part of the shape of an object and coverting the solid part into a part consisting of a region where it is cured or a region where it is maintained in an uncured state according to each of exposure levels.
When a design displayed on the output image screen of a computer is satisfactory, parts are manufactured and when the design needs to be corrected, a change is repeatedly made through the computer. In this case, a pattern for stimulating each of many superposed thin layers 30a, 30b, 30c of a transferable fluid medium 22 is changed partially in a data processing step 25. Further, alteration data for converting the solid part to the part comprising a region where it is cured according to a first exposure level and a region where it is cured according to a second lower exposure level or a region where it is maintained in an uncured state while each of the thin layers 30a, 30b, 30c is initially formed, is created.
LEWIS CHARLES WILLIAM (US)
FREED RAYMOND SAMUEL (US)
SPENCE STUART THOMAS (US)
VINSON WAYNE ALLAN (US)
SMALLEY DENNIS ROLLETTE (US)
HULL CHARLES W
SPENCE STUART T
LEWIS CHARLES W
VINSON WAYNE B
WAYNE S FRED
SMALLEY DENNIS R
3 D SYSTEMS INC
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