CN106408655B - A kind of 3D hollowed-out light cover design method - Google Patents
A kind of 3D hollowed-out light cover design method Download PDFInfo
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- CN106408655B CN106408655B CN201610837648.3A CN201610837648A CN106408655B CN 106408655 B CN106408655 B CN 106408655B CN 201610837648 A CN201610837648 A CN 201610837648A CN 106408655 B CN106408655 B CN 106408655B
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- hollow out
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- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
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Abstract
The present invention relates to computer graphical processings and industrial design crossing domain, more particularly to a kind of novel hollow out 3D lampshade design method, this method is by a plane body with thickness, it is curled into the cylinder of no bottom surface and top surface, cylindrical surface is evenly dividing again to form multiple control grids, hollow out element of volume iteration is tied in control grid.By forming complicated and diversified hollow out 3D lampshade model to the basic deformation of cylindrical body and complicated deformation.It is compared with most Industrial Design Softwares, design method function of the present invention is more single-minded, and operation is easier, and the design effect of lampshade can be intuitively observed in conjunction with people after computer graphics, by functional areas parameter regulation, user can easily make model reach oneself preset effect.
Description
Technical field
The present invention relates to computer graphical processings and industrial design crossing domain, and in particular to a kind of hollow out 3D lampshade design
Method.
Background technique
Material object modeling be the very important component part of industrial design field, so far the modeling software of comparative maturity have CAD,
3DMAX, Maya, rhinoceros, UG, PROE, SolidWorks, ZBrush etc., but this design software is complicated for operation general less suitable
Layman is closed to use.
In view of home decoration increasingly has the tendency that autonomous Design now, relative to the designer people for asking professional team
Prefer manual designs in person, and a part that lampshade is indispensable as house ornamentation details, design can influence in detail
The atmosphere of entire house ornamentation environment.Therefore, a succinct intuitive easy-operating lampshade modeling method is designed, to a certain extent right and wrong
It is often necessary.
Summary of the invention
Aiming at the problem that existing modeling software, complicated for operation and unsuitable layman is used, the present invention proposes that one kind is engraved
Empty 3D lampshade design method is clicked by mouse and constructs basic lampshade model, and the hollow out of load is bound after addition control grid
Element of volume, then control grid and control point are manually adjusted, so that the preset model in the minds of people can be reached after lampshade deformation.
To achieve the goals above, specific technical solution of the present invention is as follows: a kind of 3D hollowed-out light cover design method, including such as
Lower step:
1) basis 3D lampshade model is constructed, construction method is as follows:
1.1) the 2D regular planar for having thickness is chosen, setting planar base lateral coordinates are [x0,x1], longitudinal coordinate is
[y0,y1], normal to screen is z-axis；
1.2) 2D regular planar is spliced into cylinder, i.e. basis 3D lampshade model, cylinder top and bottom
End is not closed, and joining method is by the 2D coordinate (x of 2D regular planari,yi) convert to 3D coordinate (xi',yi',zi'), conversion is public
Formula is as follows:
Wherein, UnitV () is that normalization calculates, and R and r are the exradius after curling and the inner circle after curling half respectively
Diameter, width are bottom side length；
2) hollow out element of volume is added on basic 3D lampshade model, is included the following steps:
2.1) basic hollow out element of volume is chosen in basic model library；
2.2) the hollow out element of volume of lampshade is deleted using selective grid connection at the center hollow-out part of hollow out element of volume
Except connected grid cell；
2.3) the hollow out element of volume of lampshade is tied in the control grid of cylindrical body, i.e., set entire cylindrical body as needed
N control grid is set, hollow out element of volume, which is iterated, to be tied in each control grid；
3) simple deformation is carried out to basic 3D lampshade model, simple deformation includes high deformation and simple radius deformation；
4) complicated deformation is carried out to basic 3D lampshade model, i.e., by radius curve etc. than binding cylindrical body, in radius curve
The upper multiple control points of setting, the complicated deformation of 3D lampshade model is controlled by dragging control point, realizes the local radius hair of cylinder
Changing；Wherein, the mapping point between non-controlling point uses linear interpolation, and the linear interpolation radium computing method of mapping point is such as
Under:
In formula, D' is the radius value for needing the cylinder solved, i.e. the linear interpolation radius of mapping point；D is not adjust baseline
When cylindrical radius, dwithFor the distance length between two mapping point of cylindrical body, certain point of the d between two mapping points on cylinder is apart
The distance value of left side mapping point, daddFor left side mapping point radius varitation, ddecFor the right mapping point radius varitation.
Further, above-mentioned steps 2) in basic model library hollow out monomer basic model type by default or
Set by user oneself, be divided into inside and outside two layers and can independent deformation, inside and outside two layers of connection grid is using triangle surface generation
Algorithm Delaunay is smoothly connected.
Further, above-mentioned steps 2) in control grid can be evenly distributed in cylindrical body, or according to the density of setting
Difference uniformly encrypts from bottom to top or uniformly subtracts close distribution.
Further, above-mentioned steps 3), high deformation is extended in cylinder top end and the direction of bottom end two, in circle
When height of column changes, the different directions of bottom end and top direction extend meeting so that hollow out element of volume automatically adjusts point
Cloth is zoomed in or out hollow out element of volume using automatic duplication and panning techniques；Simple radius deformation is uniformly to become cylindrical body
Slightly or attenuate, while overall variation, hollow out element of volume individual under the action of controlling grid carries out recess and convex shaped
Become, but for the line density of hollow out element, i.e., the interior hollow out element of volume number of one circle is constant.
Compared with most Industrial Design Softwares, the present invention is based on a kind of 3D hollowed-out light be provide with meter methodological function it is more single-minded, behaviour
Make easier, the design effect of lampshade can be intuitively observed in conjunction with people after computer graphics, by functional areas parameter regulation,
User can easily make model reach oneself preset effect.
Detailed description of the invention
Fig. 1 is that 3D hollowed-out light is provide with meter method flow diagram.
Fig. 2 is the basic model of 3D hollow out lampshade.
Fig. 3 is the basic model library of hollow out element of volume.
Fig. 4 is that different hollow out element of volume are tied to effect picture in cylindrical body.
Fig. 5 is the different densities distributed effect figure of hollow out element of volume.
Fig. 6 is the simple deformation effect picture of 3D hollow out lampshade.
Fig. 7 is the complicated deformation effect picture of 3D hollow out lampshade.
Specific embodiment
The invention will be further described with embodiment with reference to the accompanying drawing.
Fig. 1 is that a kind of 3D hollowed-out light is provide with meter systems flow chart, comprising the following steps:
1) basis 3D lampshade model is constructed, construction method is as follows:
1.1) the 2D regular planar for having thickness is chosen, setting planar base lateral coordinates are [x0,x1], longitudinal coordinate is
[y0,y1], normal to screen is z-axis；
1.2) 2D regular planar is spliced into cylinder, i.e. basis 3D lampshade model, cylinder top and bottom
End is not closed, and joining method is by the 2D coordinate (x of 2D regular planari,yi) convert to 3D coordinate (xi',yi',zi'), conversion is public
Formula is as follows:
Wherein, UnitV () is that normalization calculates, and R and r are the exradius after curling and the inner circle after curling half respectively
Diameter, width are bottom side length；.
In specific embodiment, work as xiLateral value density it is bigger, i.e. xiAnd xi+1Difference it is smaller, the song obtained after curling
Face is more smooth；Obtained smooth curling 3D cylindrical body, top and bottom, i.e., the upper edge of lampshade and lower edge are all not close
, its basic model is as shown in Figure 2 after being previously added hollow out element of volume.
2) hollow out element of volume is added on basic 3D lampshade model, is included the following steps:
2.1) the single basic hollow out element of volume of construction, single basic hollow out element of volume is other than regular figure, and user is also
A basic model library can be can be used as with customized complex figure element, such figure and be directed into hollow out 3D lampshade design department
In system；
In specific embodiment, the basic model library of hollow out element of volume as shown in figure 3, basic model library is divided into functional areas,
Draw area and the part of show area three.User draws area in functional areas selection or customized different basic figure, in two dimension
It designs inside and outside hollow out element of volume, multiple triangle gridding dough sheets is connected into using Delaunay triangulation network lattice join algorithm,
3D model is formed in show area；
2.2) the hollow out element of volume of lampshade is deleted using selective grid connection at the center hollow-out part of hollow out element of volume
Except connected grid cell；
2.3) the hollow out element of volume of lampshade is tied in the control grid of cylindrical body, i.e., set entire cylindrical body as needed
N control grid is set, hollow out element of volume, which is iterated, to be tied in each control grid；Wherein, it can will be controlled according to user demand
Grid processed is evenly distributed in cylindrical body, can also uniformly be encrypted according to the density contrast of setting from bottom to top or uniformly be subtracted
Close distribution；
In specific implementation, it is as shown in Figure 4 that different hollow out element of volume are tied to effect in cylindrical body control grid；Hollow out volume elements
The different densities distributed effect figure of element is as shown in Figure 5；
3) simple deformation is carried out to basic 3D lampshade model, simple deformation includes high deformation and simple radius deformation；Its
In, high deformation is extended in cylinder top end and the direction of bottom end two, in cylinder height variation, bottom end and top
It holds the different directions of direction to extend meeting distribution so that hollow out element of volume automatically adjusts, is put using automatic duplication and panning techniques
Big or diminution hollow out element of volume；Simple radius deformation is that cylindrical body is uniformly thicker or attenuates, while overall variation,
Hollow out element of volume individual under the action of controlling grid carries out recess and raised deformation, but for the line density of hollow out element, i.e.,
Hollow out element of volume number is constant in one circle；
In specific implementation, length deformation and radius deformation occur for height and radius sliding block in sliding function area, cylindrical body,
As shown in Figure 6.
4) complicated deformation is carried out to basic 3D lampshade model, i.e., by radius curve etc. than binding cylindrical body, in radius curve
The upper multiple control points of setting, the complicated deformation of 3D lampshade model is controlled by dragging control point, realizes the local radius hair of cylinder
Changing；Wherein, the mapping point between non-controlling point uses linear interpolation, and the linear interpolation radium computing method of mapping point is such as
Under:
In formula, D' is the radius value for needing the cylinder solved, i.e. the linear interpolation radius of mapping point；D is not adjust baseline
When cylindrical radius, dwithFor the distance length between two mapping point of cylindrical body, certain point of the d between two mapping points on cylinder is apart
The distance value of left side mapping point, daddFor left side mapping point radius varitation, ddecFor the right mapping point radius varitation.
In specific implementation, the height of the cylindrical body of baseline and design in radius curve adjusting panel is proportional,
After adding multiple control points on baseline, mouse drag control point changes baseline, and phase occurs for radius after being mapped to the cylinder
It should change, complicated deformation effect picture is as shown in Figure 7.
Claims (4)
1. a kind of hollow out 3D lampshade design method, it is characterised in that include the following steps:
1) basis 3D lampshade model is constructed, construction method is as follows:
1.1) the 2D regular planar for having thickness is chosen, setting planar base lateral coordinates are [x0,x1], longitudinal coordinate is [y0,y1],
Normal to screen is z-axis；
1.2) 2D regular planar is spliced into cylinder, i.e. basis 3D lampshade model, cylinder top and bottom end are not
Closing, joining method is by the 2D coordinate (x of 2D regular planari,yi) convert to 3D coordinate (xi',yi',zi'), conversion formula is such as
Under:
Wherein, UnitV () is that normalization calculates, and R and r are the exradius after curling and the inner circle radius after curling respectively,
Width is bottom side length；
2) hollow out element of volume is added on basic 3D lampshade model, is included the following steps:
2.1) basic hollow out element of volume is chosen in basic model library；
2.2) the hollow out element of volume of lampshade deletes phase at the center hollow-out part of hollow out element of volume using selective grid connection
Grid cell even；
2.3) the hollow out element of volume of lampshade is tied in the control grid of cylindrical body, i.e., n is arranged in entire cylindrical body as needed
A control grid, hollow out element of volume, which is iterated, to be tied in each control grid；
3) simple deformation is carried out to basic 3D lampshade model, simple deformation includes high deformation and simple radius deformation；
4) complicated deformation is carried out to basic 3D lampshade model, i.e., set radius curve etc. on radius curve than binding cylindrical body
Multiple control points are set, the complicated deformation of 3D lampshade model is controlled by dragging control point, realizes that the local radius of cylinder becomes
Change；Wherein, the mapping point between non-controlling point uses linear interpolation, and the linear interpolation radium computing method of mapping point is as follows:
In formula, D' is the radius value for needing the cylinder solved, i.e. the linear interpolation radius of mapping point；D is when not adjusting baseline
Cylindrical radius, dwithFor the distance length between two mapping point of cylindrical body, certain point of the d between two mapping points on cylinder is at a distance of the left side
The distance value of mapping point, daddFor left side mapping point radius varitation, ddecFor the right mapping point radius varitation.
2. hollow out 3D lampshade design method as described in claim 1, which is characterized in that in the step 2) in basic model library
The basic model type of hollow out monomer is set by default or by user oneself, be divided into inside and outside two layers and can independent deformation,
Inside and outside two layers of connection grid is smoothly connected using triangle surface generating algorithm Delaunay.
3. hollow out 3D lampshade design method as described in claim 1, it is characterised in that the control grid in the step 2) can
It is evenly distributed in cylindrical body, or close distribution is uniformly encrypted or uniformly subtracted from bottom to top according to the density contrast of setting.
4. hollow out 3D lampshade design method as described in claim 1, it is characterised in that the step 3), high deformation are in circle
Cylinder top and the direction of bottom end two extend, in cylinder height variation, the different directions of bottom end and top direction
Extend meeting distribution so that hollow out element of volume automatically adjusts, is zoomed in or out hollow out body using replicating automatically with panning techniques
Element；Simple radius deformation is that cylindrical body is uniformly thicker or attenuates that while overall variation, hollow out element of volume is being controlled
Individual carries out recess and raised deformation under the action of grid, but for the line density of hollow out element, i.e., one encloses interior hollow out element of volume
Number is constant.
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Citations (4)
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|---|---|---|---|---|
| CN103729876A (en) * | 2013-12-12 | 2014-04-16 | 深圳先进技术研究院 | Deformation method of three-dimensional artificial object model |
| CN104143209A (en) * | 2014-06-20 | 2014-11-12 | 浙江工业大学 | Method for engraving three-dimensional model based on line pattern |
| CN105205856A (en) * | 2015-09-15 | 2015-12-30 | 江苏大学 | 3D plant branch modeling algorithm based on freehand sketching |
| CN105825033A (en) * | 2016-04-13 | 2016-08-03 | 山东大学 | 3D-printing-oriented three-dimensional online design system and 3D-printing-oriented three-dimensional online design method for lamp |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9977844B2 (en) * | 2014-05-13 | 2018-05-22 | Atheer, Inc. | Method for providing a projection to align 3D objects in 2D environment |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103729876A (en) * | 2013-12-12 | 2014-04-16 | 深圳先进技术研究院 | Deformation method of three-dimensional artificial object model |
| CN104143209A (en) * | 2014-06-20 | 2014-11-12 | 浙江工业大学 | Method for engraving three-dimensional model based on line pattern |
| CN105205856A (en) * | 2015-09-15 | 2015-12-30 | 江苏大学 | 3D plant branch modeling algorithm based on freehand sketching |
| CN105825033A (en) * | 2016-04-13 | 2016-08-03 | 山东大学 | 3D-printing-oriented three-dimensional online design system and 3D-printing-oriented three-dimensional online design method for lamp |
Non-Patent Citations (1)
| Title |
|---|
| 三维建模技术在家具设计中的应用;蒋星 等;《中南林业科技大学学报》;20120930;第32卷(第9期);149-152 |
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