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Dual constraint based selection calling method of LOD (Level of Detail) model in three-dimensional scene

InactiveCN103646415AMeeting the Needs for High Image QualityIncrease rate3D-image renderingViewpointsImaging quality
The invention discloses a dual constraint based selection calling method of an LOD (Level of Detail) model in a three-dimensional scene. The dual constraint based selection calling method comprises entering into the three-dimensional scene; obtaining a viewpoint coordinate of a user and a center coordinate of the current object in the three-dimensional scene; calculating the sight distance and judging whether the current object is within the field of view of the user or not; calculating the interest degree of the user of a three-dimensional model and calling the user required level number of the current object model; combining with the distance constraint condition to select to call the user required LOD model of the current object; rendering and drawing the selected model; judging whether objects in the three-dimensional scene are traversed or not. According to the dual constraint based selection calling method of the LOD model in the three-dimensional scene, the LOD model can be selected to be called based on the interest degree and the distance, the requirements for the high image quality of the high interest degree of object of the user are met, meanwhile the weakening treatment is performed on the low interest degree of object of the user, and the rendering speed of a system is improved under the condition that the basic visual demand of the user is satisfied.
Owner:秦皇岛数据产业研究院有限公司

Equipment and process for manufacturing flexible circuit board

The invention relates to equipment and process for manufacturing a flexible circuit board in the technical field of manufacturing of an electronic circuit board. The equipment comprises an elongate framework type machine body, wherein an automatic operating platform is arranged at a top part of the framework type machine body and comprises a control panel, an automatic feeding part, an automatic lamination part, an automatic rolling cutting part, a splitting mechanism, a traction mechanism and a winding mechanism, the automatic feeding part comprises a bottom membrane feeding mechanism, an elongate conductor feeding mechanism, a combination medium membrane feeding mechanism and a cover membrane feeding mechanism, the automatic lamination part comprises a first lamination mechanism and a second lamination mechanism, and the automatic rolling cutting part comprises an upper rolling cutter mechanism and a lower rolling cutter mechanism. Compared with a traditional punching or etching process, the process employing rolling cutting has the advantages that an irregularly-shaped cross section and a clearance hole can be synchronously cut in a rolling way, the rolling cutting efficiency is high, no stop is needed during the rolling cutting process, assembly line type processing can be directly completed, so that the production working efficiency of a product can be improved, labor investment is greatly reduced, and the qualified rate and the accuracy of a finished product are improved.
Owner:广东力兹微电气技术有限公司
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