48 results about "Vertex normal" patented technology

The present application relates to a volume cloud rendering method, device, electronic equipment and storage medium, the method comprising: drawing the original grid model of the volume cloud according to the vertex normal vector to draw at least one layer of grid model; The noise threshold corresponding to the grid model screens the pixels of the grid model to obtain a rendering model; calculates the illumination information corresponding to the rendering model according to the illumination parameters; renders the rendering model according to the illumination information to obtain Volumetric cloud to be displayed. The shape of the volumetric cloud in this technical solution is determined based on the grid model, rather than the shape of the noise map. If you want to change the shape of the volumetric cloud, you only need to set the number of additional layers drawn and the noise threshold for filtering pixels. , there is no need to pre-select a specific noise map; reducing the number of noise maps used further reduces the performance overhead of generating volumetric clouds, making volumetric clouds run smoothly on mobile devices.

The invention belongs to the technical field of electromagnetic environment visualization, and discloses a three-dimensional visualization method for electromagnetic environment body data. The method comprises the following steps of: determining the electromagnetic environment body data by a radio wave propagation physical model; dividing the electromagnetic environment body data into a tetrahedron structure, forming a two-dimensional texture in a vertex index manner according to the vertexes of the tetrahedron, and inputting a tetrahedron vertex function value texture and a vertex index texture into a graphics processor; generating contour surface vertexes according to predetermined contour surface threshold judgment, connecting the contour surface vertexes of same threshold into a contour surface, and forming a plurality of contour surfaces of the electromagnetic environment; and displaying the edge of an electromagnetic environment model in a manner of extruding according to a relation between vertex normal vectors and view points, and fusing and embedding the plurality of contour surfaces into the three-dimensional environment in a semitransparent manner. With the method, the three-dimensional electromagnetic environment can be represented visually and intuitively, more internal information representation of the electromagnetic environment are provided, and the correctnessand the completeness of the electromagnetic environment representation and the definition of a boundary contour are all improved.

The invention relates to a feature-preserving three-dimensional Mesh model denoising method. First calculate the guide normal vectors of all triangle faces, and use the guide normal vectors to filter the normal vectors of all triangle faces based on the joint bilateral filtering algorithm; secondly, use the filtered triangle face normal vectors to classify feature points based on the normal voting tensor method, and enhance Weak features and false features are eliminated; then, the non-feature vertices are updated based on the normal vector constraint items filtered by the neighbor triangles, the non-feature areas are denoised and the optimized normal vectors of the non-feature points are obtained; then according to the eigenvectors of the tensor matrix and Vertex normal vector similarity clusters the support neighborhood point set of the feature point, and fits the support plane of the feature point; finally, the feature point is updated based on the normal vector constraint item of the neighbor triangle surface and the constraint item of the support plane, and the feature area is removed. noise. This method can solve the problem of feature over-smoothing and feature loss in the denoising process of the 3D Mesh model, so as to obtain a 3D Mesh model that retains features after noise removal.

The present invention provides a vertex color drawing and baking method and system applied to the Unity engine. The method includes reading the vertex position and vertex normal of each vertex in the grid model; According to the direction of the vertex normal of a vertex, render the vertex; traverse each vertex, and perform the rendering operation one by one; obtain the corresponding sampling color according to the rendering texture of each vertex, and write it into the vertex color information . The invention can not only reduce the storage capacity of AO information, but also improve the baking efficiency; further, the model has high correlation, which is convenient for post-editing; finally, it can also support custom fine-tuning of the baked vertex color.