CN104680572A - BIM-based mobile terminal building model rendering performance optimization method and system - Google Patents
BIM-based mobile terminal building model rendering performance optimization method and system Download PDFInfo
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- CN104680572A CN104680572A CN201510080592.7A CN201510080592A CN104680572A CN 104680572 A CN104680572 A CN 104680572A CN 201510080592 A CN201510080592 A CN 201510080592A CN 104680572 A CN104680572 A CN 104680572A
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Abstract
The invention provides a BIM (Building Information Modeling)-based mobile terminal building model rendering performance optimization method and system. The optimization method comprises the following steps: performing lightweight processing on a first BIM to obtain a third BIM; only rendering members visible in the scene camera perspective in the third BIM. The lightweight processing step comprises the following sub-steps: deriving a second BIM from the first BIM, and storing the color material information of members in the first BIM; simplifying a solid mesh of the second BIM, and processing the boundary representation to obtain the third BIM. According to the invention, the problem that the BIM cannot be rendered due to poor mobile terminal hardware performance is solved; the BIM can be rendered on the mobile terminal smoothly.
Description
Technical field
The present invention relates to BIM application technology and IT field, relate to more specifically a kind ofly in mobile client, optimize technical method and the system of BIM model played up.
Background technology
BIM and Building Information Modeling (BIM) is a kind of method of architectural design of innovation, construction and management.BIM breaches traditional design, and be no longer two-dimentional drawing complicated in the plane, BIM model have employed the component of 3 D stereo, will build completely visual, and add intuitive and work efficiency.BIM modeling software conventional at present has the Revit of autodesk, inc..But Revit is very high for the requirement of hardware device, for the CPU processing power of computer, GPU presentation capability also has internal memory video card to have very high requirement, in a disguised form improves the cost of equipment.
Already in some build in softwares and game 3D model on mobile device end, but the optimization of playing up and acceleration remain always in the problem of discuss and study.Especially be directed to BIM model, it contains ten hundreds of components, the performances such as CPU, GPU can not show a candle to PC end mobile device on run, play up the difficult problem becoming and need most and capture.
Summary of the invention
For defect of the prior art, the object of this invention is to provide a kind of mobile terminal BUILDINGS MODELS based on BIM and play up performance optimization method and system.The technical problem to be solved in the present invention be embodied in following some:
1) smoothness BIM model can be rendered at mobile terminal.
2) optimize on existing Rendering.
3) on common mobile terminal, operation model is smooth without card.
Play up performance optimization method according to a kind of mobile terminal BUILDINGS MODELS based on BIM provided by the invention, comprise the steps:
Step 1: carry out light-weight technologg to a BIM model, obtains the 3rd BIM model;
Step 2: only component visible in scene camera perspective is played up in the 3rd BIM model.
Preferably, described step 1 comprises the steps:
Step 1.1: a BIM model is exported as the 2nd BIM model, and the component color material information of preserving component in a BIM model; Wherein, the configuration requirement of operation and display the 2nd BIM model is lower than the configuration requirement running and show a BIM model;
Step 1.2: simplify the entity grid of the 2nd BIM model, and process boundary representation, obtains the 3rd BIM model.
Preferably, described step 1.2 comprises the steps:
Step 1.2.1: the maximum permission angle A increasing often pair of adjacent polygons face in the 2nd BIM model, merges into a polygon facet by the adjacent polygons face that angle each other in the 2nd BIM model is less than described maximum permission angle; Increase the maximum permission angle B of often pair of adjacent segments in the 2nd BIM model, the adjacent segments that angle each other in the 2nd BIM model is less than described maximum permission angle B is merged into one article of line segment;
Step 1.2.2: to the maximum permission absolute error between the 2nd BIM model adjustment grid and entity solid, the component in a BIM model can not be lacked in the 2nd BIM model.
Preferably, described step 2 comprises the steps:
-play up according to point-line-surface information and component color material information in the 3rd BIM model, wherein, described component color material information comes from a BIM model.
Preferably, described step 2 comprises following arbitrary group or many group technique feature:
Multiple components that the lines of-polygon facet that is combined and merging are corresponding, play up respectively according to respective component color material information respectively;
The form of the-the two BIM model meets the operation of front end smart machine operating system and the 3D form of display requirement.
Preferably, described step 1 comprise following any one or appoint multiple step:
-summit of causing model face number to exceed setting threshold value in a BIM model is removed;
-summit of causing moulded dimension to exceed setting threshold value in a BIM model is removed;
-submodel in a BIM model is rebuild;
-the race's example in a BIM model simplified and is replaced by MaxScript script;
-submodel of identical material in a BIM model is merged.
Preferably, described scene camera perspective picture is planimetric map, and wherein, described planimetric map is the 3D model that the scene camera by being arranged on the 3rd BIM model top obtains; In described planimetric map, the only component of the selected floor of display, and do not show the component of non-selected floor.
Preferably, described scene camera perspective picture is first person figure, in described first person figure, only shows the component of first person place floor, and does not show the component of non-place floor.
Preferably, also comprise the steps:
Forward end smart machine issues described 3rd BIM model, wherein, is associated mate between a BIM model with the 3rd BIM model by component ID.
Preferably, described step 2 comprises the steps:
-details level belonging to component is determined different to play up quality rank, plays up the component in the 3rd BIM model according to playing up quality rank.
Play up performance optimization system according to a kind of mobile terminal BUILDINGS MODELS based on BIM provided by the invention, it plays up performance optimization method for performing the above-mentioned mobile terminal BUILDINGS MODELS based on BIM.
Compared with prior art, the present invention has following beneficial effect:
1, mobile terminal hardware performance is solved not enough and the difficulty of BIM model cannot be played up.
That 2, can smoothly pause without card plays up BIM model at mobile terminal.
Accompanying drawing explanation
By reading the detailed description done non-limiting example with reference to the following drawings, other features, objects and advantages of the present invention will become more obvious:
Fig. 1 is method flow schematic diagram of the present invention.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.Following examples will contribute to those skilled in the art and understand the present invention further, but not limit the present invention in any form.It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, some distortion and improvement can also be made.These all belong to protection scope of the present invention.
Play up performance optimization method according to a kind of mobile terminal BUILDINGS MODELS based on BIM provided by the invention, comprise the steps:
Step 1: carry out light-weight technologg to a BIM model, obtains the 3rd BIM model; Such as, Unity3D carries out light-weight technologg to a BIM model of Revit release format, carry out subtracting face operation, thus greatly reduce the data volume of model; Such as, a described BIM model is Revit release format, and described front end smart machine operating system is mobile phone operating system TOS.
Step 2: only component visible in scene camera perspective is played up in the 3rd BIM model; Such as utilize occluding technique to alleviate the workload played up, only the visible component within the scope of scene camera perspective is played up, invisible component is not played up it.Preferably, described step 1 comprises the steps:
Step 1.1: a BIM model is exported as the 2nd BIM model, and the component color material information of preserving component in a BIM model; Wherein, the configuration requirement of operation and display the 2nd BIM model is lower than the configuration requirement running and show a BIM model;
Step 1.2: simplify the entity grid of the 2nd BIM model, and process boundary representation, obtains the 3rd BIM model.
Preferably, described step 1.2 comprises the steps:
Step 1.2.1: the maximum permission angle A increasing often pair of adjacent polygons face in the 2nd BIM model, merges into a polygon facet by the adjacent polygons face that angle each other in the 2nd BIM model is less than described maximum permission angle; Increase the maximum permission angle B of often pair of adjacent segments in the 2nd BIM model, the adjacent segments that angle each other in the 2nd BIM model is less than described maximum permission angle B is merged into one article of line segment; Thus reach the effect subtracting face, but meanwhile, maintain the former profile of model as much as possible.
Step 1.2.2: to the maximum permission absolute error between the 2nd BIM model adjustment grid and entity solid, the component in a BIM model can not be lacked in the 2nd BIM model.
Preferably, described step 2 comprises the steps:
-play up according to point-line-surface information and component color material information in the 3rd BIM model, wherein, described component color material information comes from a BIM model.
Preferably, described step 2 comprises following arbitrary group or many group technique feature:
Multiple components that the lines of-polygon facet that is combined and merging are corresponding, play up respectively according to respective component color material information respectively;
The form of the-the two BIM model meets the operation of front end smart machine operating system and the 3D form of display requirement.
Preferably, described step 1 comprise following any one or appoint multiple step:
-summit of causing model face number to exceed setting threshold value in a BIM model is removed;
-summit of causing moulded dimension to exceed setting threshold value in a BIM model is removed;
-submodel in a BIM model is rebuild;
-the race's example in a BIM model simplified and is replaced by MaxScript script;
-submodel of identical material in a BIM model is merged.
Preferably, described scene camera perspective picture is planimetric map, and wherein, described planimetric map is the 3D model that the scene camera by being arranged on the 3rd BIM model top obtains; In described planimetric map, the only component of the selected floor of display, and do not show the component of non-selected floor.Planimetric map is also 3D rendering, and this is the visual effect that component by closing other floor heights realizes two dimension, sets in Unity3D program, when selected a certain floor, close the visible of all the other floors, by such mode, the component played up can be reduced, thus reach the object of acceleration.
Preferably, described scene camera perspective picture is first person figure, in described first person figure, only shows the component of first person place floor, and does not show the component of non-place floor.Only opening chooses the first person of floor height to play up, and closes other floor heights, and this will save taking of time of playing up and CPU greatly.
Preferably, also comprise the steps:
Forward end smart machine issues described 3rd BIM model, wherein, is associated mate between a BIM model with the 3rd BIM model by component ID.
Described step 2 comprises the steps:
-details level belonging to component is determined different to play up quality rank, plays up the component in the 3rd BIM model according to playing up quality rank.Such as, the distance directly different from scene camera according to component can set and different play up quality rank.
To play up performance optimization method corresponding to the described mobile terminal BUILDINGS MODELS based on BIM, play up performance optimization system according to a kind of mobile terminal BUILDINGS MODELS based on BIM provided by the invention, it plays up performance optimization method for performing the above-mentioned mobile terminal BUILDINGS MODELS based on BIM.
Further particularly, introduce details Hierarchical Optimization to play up.Details Hierarchical Optimization is played up, and is the position residing in display environment of the node of setting model and importance degree, determines the Resourse Distribute that object is played up, reduce face number and the degrees of detail of insignificant object, thus obtain high efficiency rendering operation.Such as, in the visual angle viewing that camera lens is far away, only need general outline and do not need very details, the grid of division just can more greatly, and the element played up just greatly reduces.And when checking details enlarged drawing, the grid of division is just closeer, detailed situation can be checked.
The present invention, in R&D process, at the beginning, attempts, as most of software, being attempted to play up out by whole model, but one is too large for the load of mobile terminal, and travelling speed is slow, and two, user cannot accurately find required component or position.Attempted by various effort, finally find a kind of solution of optimum, be the planimetric map for split screen display and first person figure, all only play up visible floor height, realized by the switch setting render.This not only saves render time greatly, improves rendering speed, the imperceptible component of user also can be allowed to be hidden, be convenient to them simultaneously and look for process component.
Above specific embodiments of the invention are described.It is to be appreciated that the present invention is not limited to above-mentioned particular implementation, those skilled in the art can make various distortion or amendment within the scope of the claims, and this does not affect flesh and blood of the present invention.
Claims (10)
1. the mobile terminal BUILDINGS MODELS based on BIM plays up a performance optimization method, it is characterized in that, comprises the steps:
Step 1: carry out light-weight technologg to a BIM model, obtains the 3rd BIM model;
Step 2: only component visible in scene camera perspective is played up in the 3rd BIM model.
2. the mobile terminal BUILDINGS MODELS based on BIM according to claim 1 plays up performance optimization method, and it is characterized in that, described step 1 comprises the steps:
Step 1.1: a BIM model is exported as the 2nd BIM model, and the component color material information of preserving component in a BIM model; Wherein, the configuration requirement of operation and display the 2nd BIM model is lower than the configuration requirement running and show a BIM model;
Step 1.2: simplify the entity grid of the 2nd BIM model, and process boundary representation, obtains the 3rd BIM model.
3. the mobile terminal BUILDINGS MODELS based on BIM according to claim 2 plays up performance optimization method, and it is characterized in that, described step 1.2 comprises the steps:
Step 1.2.1: the maximum permission angle A increasing often pair of adjacent polygons face in the 2nd BIM model, merges into a polygon facet by the adjacent polygons face that angle each other in the 2nd BIM model is less than described maximum permission angle; Increase the maximum permission angle B of often pair of adjacent segments in the 2nd BIM model, the adjacent segments that angle each other in the 2nd BIM model is less than described maximum permission angle B is merged into one article of line segment;
Step 1.2.2: to the maximum permission absolute error between the 2nd BIM model adjustment grid and entity solid, the component in a BIM model can not be lacked in the 2nd BIM model.
4. the mobile terminal BUILDINGS MODELS based on BIM according to claim 1 plays up performance optimization method, and it is characterized in that, described step 2 comprises the steps:
-play up according to point-line-surface information and component color material information in the 3rd BIM model, wherein, described component color material information comes from a BIM model.
5. the mobile terminal BUILDINGS MODELS based on BIM according to claim 3 plays up performance optimization method, it is characterized in that, described step 2 comprises following arbitrary group or many group technique feature:
Multiple components that the lines of-polygon facet that is combined and merging are corresponding, play up respectively according to respective component color material information respectively;
The form of the-the two BIM model meets the operation of front end smart machine operating system and the 3D form of display requirement.
6. the mobile terminal BUILDINGS MODELS based on BIM according to claim 1 plays up performance optimization method, its feature
Be, described step 1 comprise following any one or appoint multiple step:
-summit of causing model face number to exceed setting threshold value in a BIM model is removed;
-summit of causing moulded dimension to exceed setting threshold value in a BIM model is removed;
-submodel in a BIM model is rebuild;
-the race's example in a BIM model simplified and is replaced by MaxScript script;
-submodel of identical material in a BIM model is merged.
7. the mobile terminal BUILDINGS MODELS based on BIM according to claim 1 plays up performance optimization method, it is characterized in that, described scene camera perspective picture is planimetric map, and wherein, described planimetric map is the 3D model that the scene camera by being arranged on the 3rd BIM model top obtains; In described planimetric map, the only component of the selected floor of display, and do not show the component of non-selected floor; Or
Described scene camera perspective picture is first person figure, in described first person figure, only shows the component of first person place floor, and does not show the component of non-place floor.
8. the mobile terminal BUILDINGS MODELS based on BIM according to claim 1 plays up performance optimization method, and it is characterized in that, described step 2 comprises the steps:
-details level belonging to component is determined different to play up quality rank, plays up the component in the 3rd BIM model according to playing up quality rank.
9. the mobile terminal BUILDINGS MODELS based on BIM according to claim 1 plays up performance optimization method, it is characterized in that, also comprises the steps:
Forward end smart machine issues described 3rd BIM model, wherein, is associated mate between a BIM model with the 3rd BIM model by component ID.
10. the mobile terminal BUILDINGS MODELS based on BIM plays up a performance optimization system, it is characterized in that, requires that the mobile terminal BUILDINGS MODELS based on BIM according to any one of 1 to 9 plays up performance optimization method for enforcement of rights.
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