| Construction of Virtual Turning Scene Based on Local Ray Tracing Algorithm |
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| 作者姓名： | 王国锋 王子良 王太勇School of Mechanical Engineering Tianjin University |
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| 作者单位： | School of Mechanical Engineering，Tianjin University，Tianjin University of Technology T ianjin 300072，China，Tianjin 300191，China，T ianjin 300072，China |
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| 基金项目： | NationalNaturalScienceFoundationofChina(No 50 1 750 81 ) |
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| 摘 要： | Withtherapiddevelopmentofmanufacturingtechnology ,traditionalsimulationofmachiningcannotmeettheneedsofthepeople .Userswanttowatchnotonlythecuttingprocessbetweenthecutterandthesemi finishedpro ducts,butalsothewholemachiningscene .Manyexpertshavefocusedtheirattentiononthisstudy :aframeofvirtualmachiningfordiamondturningbuiltbyCheung1] caneveninspecttheaccuracyofthework piece ;Zhang2 ] builtavirtualmachiningcenterandthecorrespondingmeasuringcell;Wang3] describedandconstructedavirtualcuttingsy…
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Construction of Virtual Turning Scene Based on Local Ray Tracing Algorithm |
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| WANG Guo feng,WANG Zi l iang,WANG Tai yong.Construction of Virtual Turning Scene Based on Local Ray Tracing Algorithm[J].Transactions of Tianjin University,2003(2). |
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| Authors: | WANG Guo feng WANG Zi l iang WANG Tai yong |
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| Abstract: | According to the features of the turning simulation, a simplified Whitted lighti ng model is proposed based on the analysis of Phong and other local illumination model. Moreover, in order to obtain the natural lighting effects, local ray tra cing algorithm is given to calculate the light intensity of every position durin g the course of the simulation. This method can calculate the refresh area befor e calculating the intersection line, simulate the machining environment accurate ly and reduce the calculating time. Finally, an example of the virtual cutting s cene is shown to demonstrate the effects of the global illumination model. If th e CUP is 1.3 G and the internal memory is 128 M, the refreshing time of virtual turning scene can be reduced by nine times.This study plays an important role in the enrichment of the virtual manufacturing theory and the promotion of the dev elopment of the advanced manufacturing technology. |
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| Keywords: | global illumination local ray tracing virtual turning scene |
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