The Study And Ealization Of The Third Dimension Mapping In Packaging CAD System

On the basis of studying the 3D mapping in packaging CAD system, bring 3d mapping forward packaging CAD system for software of packaging decorate and realize it. First, three models in figure of packaging be confirmed and established its math model. They are prism, cylinder and commonly whirl about; Second, the creating technology of 3d graphics and illumination model be studied in the task. The dot lamp-house model and the line lamp-house model are chosen after contrast a lot of lamp-house models; Third, math model of object figure be erected in scene sculpt and projection transform. Three tables structure is selected to note all of 3d data of the object. A polyhedron back surface of scenery space disappear arithmetic be adopted in eliminating hided surface. The method model be setup and a shadow arithmetic be ascertain. VC6. 0 be used at the task. A large of image knowledge be studied. Heft of color required be added to a value of brightness so transform 2d effect to 3d effect and form a 3d mapping. For packaging effect, turning, moving, replaced backdrop be realized in the task. It is important to proved great powerful theory sustain and pioneer a feasible software design.