Abstract: A method for realistic and real-time rendering of complex scene in internet environment, comprising: generating sequences of scene-object-multi-resolution models, a scene configuration file, textures and material files, and a scene data list file; compressing the sequences of scene-object-multi-resolution models, the scene configuration file, the textures and material files, and the scene data list file and uploading the compressed files to a server; downloading, at a client terminal, the scene-object-multi-resolution models, the scene configuration file, the texture and material file, and the scene data list file in ascending order of resolution and rendering the scene simultaneously; dividing, in rendering the scene, a frustum in parallel into a plurality of partitions, generating a shadow map for each frustum, filtering the shadow maps to obtain an anti-aliasing shadowing effect; and the shadow map closest to a viewpoint is updated on a frame-by-frame basis and updating frequency decreases for the shadow m

Abstract: A method for realistic and real-time rendering of complex scene in internet environment, comprising: generating sequences of scene-object-multi-resolution models, a scene configuration file, textures and material files, and a scene data list file; compressing the sequences of scene-object-multi-resolution models, the scene configuration file, the textures and material files, and the scene data list file and uploading the compressed files to a server; downloading, at a client terminal, he scene-object-multi-resolution models, the scene configuration file, the texture and material file, and the scene data list file in ascending order of resolution and rendering the scene simultaneously; dividing, in rendering the scene, a frustum in parallel into a plurality of partitions, generating a shadow map for each frustum, filtering the shadow maps to obtain an anti-aliasing shadowing effect; and the shadow map closest to a viewpoint is updated on a frame-by-frame basis and updating frequency decreases for the shadow ma

Abstract: A method for analyzing a shape of a 3D model based on perceptive information comprises: decomposing the shape of the 3D model to generate decomposition results; and extracting a skeleton from the decomposition results. This invention can be applied to shape decomposition of objects having different shapes. The 3D models can be regular or with noise, containing either multiple annular structures or no annular structure. The decomposition method of this invention is not sensitive to noise, and the segmentation speed is high and accurate. The segmentation result of the invention can be widely applied to different branches of computer graphics and computer vision, such as computer animation, modeling, shape analysis, shape classification, object identification, etc. The skeleton extracted from the decomposition result and the following shape semantic description diagram can he applied to 3D model retrieval, model semantic analysis and so on.

Abstract: For improving the compression efficiency of 3D model processing, easier discovering of repetitive patterns is required. The invention enables simplified and improved compression of 3D models by using a pattern-instance record table, which provides the pattern-instance relationship for all instances of repetitive patterns within a 3D object. A 3D mesh model comprises data of a first reference 3D mesh model, an electronic pattern-instance record table comprising first and second instance data, wherein the first instance data points to the first reference 3D mesh model and the second instance data points to the first or a further reference 3D mesh model, and an instance record for third instance data of at least one secondary 3D mesh model instance, wherein the third instance data comprise said first and second instance data or references to said first and second instance data.