Method and system for quickly drawing complex scene based on process factory parameter model

Abstract

The invention discloses a method and a system for quickly drawing a complex scene based on a process factory parameter model and relates to the technical field of quickly drawing the complex scene. The method comprises the following steps: analyzing the process factory parameter model, thereby acquiring an object contained in the model and an volume element contained in the object as well as parameter information of the volume element; establishing a scene tree based on an eight-fork tree structure, by using the object as a tissue unit; on the basis of a fractional number of the volume element, forming layering detail models with different resolution ratios; rejecting a vision field based on the layering of an encircled box of the scene tree; judging which object and which volume element of the object are located in the vision field; based on a view point, dynamically choosing the detail model used by the volume element; achieving the purpose of changing the resolution ratio of the volume element by changing the index arrays of the volume element; and performing backward rejection on the basis of parameter analysis expression of the volume element. By using the method provided by the invention, the real-time roam problem of the large-scale process factory model is solved, the real-time roam of the large-scale process factory model can be performed on a common PC (personal computer), the preprocessing time is short, and the occupancy rate of disk space is small.

Description

technical field [0001] The invention relates to the technical field of rapid complex scene rendering, in particular to a complex scene rapid rendering method and system based on a process factory parameter model. Background technique [0002] As an important link in the process plant design quality control system, reviewers often need to review the design of the entire 3D model through interactive roaming, so as to discover and report design errors in the model in time and submit them to relevant professional design personnel to modify. At present, although the well-known foreign factory design CAD software, such as PDS and PDMS, provide roaming functions, they only have good effects on small-scale models, and most of these factory design CAD systems run on workstations. On the one hand, due to economic strength, most design institutes in our country mostly use ordinary PCs in their work, with limited performance. On the other hand, as collaborative design technology is in...

AI Technical Summary

Problems solved by technology

However, the static hierarchical method has the following problems: 1. Preprocessing time is required; 2. Multiple detailed models occupy a large amount of storage space; 3. When switching between different detailed models, there will be jitter; The interaction becomes a bottleneck, resulting in frame loss; 4. When changing the properties of an object, such as changing the material or texture, it cannot respond to all detailed models in time

However, the back side cutting technology also requires additional calculation overhead, and the calculation cost is the key to affect the back side cutting efficiency

[0007] Due to the complexity and particularity of the process factory model, there is currently no public fast drawing method specifically for the process factory model. Using the characteristics of the model, comprehensively use technologies such as viewshed culling, layer detail, and back-face culling to quickly draw, To meet the roaming needs of the process plant model

Images