CN105160710A

CN105160710A - Method for dynamically revising three-dimensional model

Info

Publication number: CN105160710A
Application number: CN201510541357.5A
Authority: CN
Inventors: 曹权林; 杨堂华; 赵志宇; 孙北宁; 白彪; 罗庆兵; 车勇波; 姚莉; 丁东; 吴秋玫; 杨鸥; 张冠一
Original assignee: Puer Supply Power Bureau of Yunnan Power Grid Co Ltd
Current assignee: Puer Supply Power Bureau of Yunnan Power Grid Co Ltd
Priority date: 2015-08-28
Filing date: 2015-08-28
Publication date: 2015-12-16

Abstract

The invention discloses a method for dynamically revising a three-dimensional model. The method is characterized in that a point wherein a mouse is positioned on a screen is projected to a model object in a three-dimensional space to obtain a tangent plane, a tangent plane method vector is calculated, and a flitch is aligned according to the tangent plane method vector. The method has the beneficial effects that a user clicks on a curved surface by a mouse to position the corresponding point on a three-dimensional model surface from the screen, the flitch positions the point to be fit to the curved surface, and the proper flitch can be created by cooperation with scaling and rotation. Therefore, the local patch processing of the model can be finished on a premise that the model is not redesigned.

Description

A kind of method on-the-fly modifying three-dimensional model

Technical field

The present invention invents to relate on a kind of basis not redesigning three-dimensional model and completes the method for the object in model being carried out to picture identification, belongs to field of software development.

Background technology

Along with the raising of equipment expanding economy and scientific and technological level, what people can not be satisfied with traditional plane two-dimensional data represents form.A kind of data exhibiting mode more directly perceived, various dimensions has occurred, three-dimensional model technology that Here it is.Along with the development of 3-D technology and the raising of computer hardware and software level, dimensional Modeling Technology more and more rely on by people for counsel.Compare traditional two dimensional model, three-dimensional model can produce plane projection and the perspective projection view in mermaid direction easily.

At present, every profession and trade all provides scale in the development of 3-D technology.By Three-dimensional Design Software, the information of two dimension being displayed in the mode of three-dimensional, carrying out routine use by supporting that three-dimensional model is published in the middle of system by the infosystem of 3-D display.But model just can not be modified to three-dimensional model, as arbitrary object in the three-dimensional model adds picture after Three-dimensional Design Software is published to the infosystem of support 3-D display.These all operations all will be carried out in Three-dimensional Design Software, and the model after having designed is re-started issue, thus the maintenance cost of the model increased, reduce the availability of model.

Summary of the invention

Can not carry out the problem of object identification in infosystem to overcome existing model, the invention provides one does not need to re-start three-dimensional design, in three-dimensional information system, directly complete the method to the arbitrary object in three-dimensional model adding picture.Thus reduce the maintenance cost of model and increase the availability of model.

The technical solution adopted for the present invention to solve the technical problems is: projected on the model object in three dimensions by mouse point on screen, obtain tangent plane, calculates tangent plane method vector, and pasting board is according to the alignment of tangent plane method vector.The present invention in order to more accurately determine place, mouse incident point tangent plane, and obtains anchor point place space size, the point of mouse on screen is offset a determining deviation up and down and obtains four new screen points, then projects on spatial model object by these points simultaneously; A plane can be determined at 3 in space, outside deratization punctuate, also project four points, one of them object is in case situation when clicking edge, before choosing wherein three points, first should determine that whether these place model objects are identical, then select three and draw two vectors with the incident point on object, and then obtain tangent plane method vector; For the situation that the face projected is plane, now can align veneer; And project the situation of curved surface, need to judge further.To obtain convex surface ordering on tangent plane after subpoint based on three, namely can judge that curved surface is concavo-convex.And according to the distance between the point on mouse incident point and face, try to achieve within the scope of the ABC of face, the concavo-convex degree of curved surface.

The invention has the beneficial effects as follows: mouse is clicked and namely navigated to corresponding point three-dimensional model face from screen point on curved surface, and pasting board navigates to this point, can fit to curved surface, then coordinates convergent-divergent and rotation, can create out applicable pasting board.Thus complete the process completed under model does not carry out the prerequisite redesigned model topical plaster.

Accompanying drawing explanation

Below in conjunction with drawings and Examples, the present invention is further described;

Fig. 1 is incident point schematic diagram; In figure, 1 for mouse offsets incident point, and 2 move incident point for mouse left avertence, and 3 offset incident point under mouse, and 4 is that right mouse offsets incident point, and 5 is mouse incident point;

Fig. 2 is salient point situation incident point schematic diagram; In figure, 1 is mouse incident point and AB 2 or BD 2 mid points (being equivalent to the projection of mouse point on ABC);

Fig. 3 is that cheaper projection realizes;

Fig. 4 is the cheaper realization at tangent plane central point.

Embodiment

See Fig. 1-Fig. 4, a kind of method on-the-fly modifying three-dimensional model, the present invention is characterised in that, is projected on the model object in three dimensions by mouse point on screen, obtains tangent plane, calculates tangent plane method vector, and pasting board is according to the alignment of tangent plane method vector.

The present invention is in order to more accurately determine place, mouse incident point tangent plane, and obtain anchor point place space size, the point of mouse on screen is offset a determining deviation up and down and obtains four new screen points, then these points are projected on spatial model object simultaneously, as shown in Figure 1.

The present invention according in space 3 can determine a plane, outside deratization punctuate, also project four points, one of them object is in case situation when clicking edge, before choosing wherein three points, first should determine that whether these place model objects are identical, then select three and draw two vectors with the incident point on object, and then obtain tangent plane method vector; For the situation that the face projected is plane, now can align veneer; And project the situation of curved surface, need to judge further; With convex surface, as shown in Figure 2.

The present invention obtains ordering on tangent plane after subpoint based on three, can judge that curved surface is concavo-convex; And can according to the distance between the point on mouse incident point and ACB, can in the hope of within the scope of the ABC of face, the concavo-convex degree of curved surface.

Claims

1. on-the-fly modify a method for three-dimensional model, it is characterized in that, projected on the model object in three dimensions by mouse point on screen, obtain tangent plane, calculate tangent plane method vector, pasting board is according to the alignment of tangent plane method vector.

2. a kind of method on-the-fly modifying three-dimensional model according to claim 1, it is characterized in that, in order to more accurately determine place, mouse incident point tangent plane, and obtain anchor point place space size, the point of mouse on screen is offset a determining deviation up and down and obtains four new screen points, then these points are projected on spatial model object simultaneously.

3. a kind of method on-the-fly modifying three-dimensional model according to claim 1, it is characterized in that, a plane can be determined at 3 in space, outside deratization punctuate, also project four points, object is in case situation when clicking edge, before choosing wherein three points, first should determine that whether these place model objects are identical, then select three and draw two vectors with the incident point on object, and then obtain tangent plane method vector; For the situation that the face projected is plane, now can align veneer; And project the situation of curved surface, need to judge further; To obtain convex surface ordering on tangent plane after subpoint based on three, can judge that curved surface is concavo-convex; And according to the distance between the point on mouse incident point and face, try to achieve within the scope of the ABC of face, the concavo-convex degree of curved surface.