投影雕刻(国外英文资料).docVIP

投影雕刻(国外英文资料)Fine carving classroom study materialProjection carvingThe engraving of the technology of the trispersoneObjective: to make a general understanding of the shape and sculpture of the surface through the form and sculpture of the standard surface.Learning content: the shape of standard surface, the parameter meaning of surface carving, the meaning of projection carvingRelevant content: spherical, cylinder, cone, torus, rotating surface, scanning surface, projection carvingThis is an example of a projected carvingAnalysis:So lets take a look at this shape, and what is the surface that looks like this? One is a cylinder, one is a scanning surface. But the cross section of the cylinder is a semicircle, and the cross section of this surface is just a part of the cylinder. So you cant construct a cylinder, you can only use a scanning surface. The text on the scan is convex, which means that it is on the surface that it is engraved on the surface. How to carve on a curved surface, you can actually just take the shape of the curved surface of the plane along the curved surface, which is the projection of the sculpture. The surface is carved and then projected.Two, construct surfaceWe know that to construct a scan surface we have to have a trajectory line and a cross section. In the orthogonal mode, draw a horizontal line and then shrink it to a horizontal 60 by reducing it. The section lines are drawn as follows:Click on the map in the arc, click on the three-point arc (three-point arc through three points not in the same line drawing a circle), feature points to capture set to capture the endpoint, the first bit of blow straight left endpoint, the second in a straight line, lantau island, the third point is a straight line right endpoints, right click the mouse, click on the end of the order. Using this circular arc as the cross section of the scan, the height of the three-point arc is the height of the surface of the structure, and the length of the three-point