CN102752491A - Generating method and system for satellite track - Google Patents
Generating method and system for satellite track Download PDFInfo
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- CN102752491A CN102752491A CN2011102497053A CN201110249705A CN102752491A CN 102752491 A CN102752491 A CN 102752491A CN 2011102497053 A CN2011102497053 A CN 2011102497053A CN 201110249705 A CN201110249705 A CN 201110249705A CN 102752491 A CN102752491 A CN 102752491A
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Abstract
The invention discloses a generating method and a system for a satellite track. The generating method includes obtaining satellite crossing points after leading an earth model in model space and generating a Bezier curve according to the satellite crossing points; obtaining at least two Bezier curve control points according to the Bezier curve; generating a plane which passes through a sphere center point of the earth model and the Bezier curve control points according to the sphere center point of the earth model and the Bezier curve control points; taking the sphere center point of the earth model as a center and fitting the Bezier curve control points so as to generate a Bezier curve of the satellite track on the plane; and outputting the Bezier curve of the satellite track. According to the generating method and the system, the problem of effective generation of the motion track during an animation simulation process of a satellite flight is solved, therefore track parameters are convenient to adjust, a more intuitive effect is provided, satellite motion can be better associated with, and preparations can be made for satellite animation.
Description
Technical field
The present invention relates to Television Digital video program production field, especially for the emulation animation simulation that carries out the satellite leap, the generation method and system of disclosed a kind of satellite trajectory.
Background technology
Along with digital cartoon is made the fast development in field, can utilize multiple digital cartoon processing mode that the motion of object is reduced and emulation, simultaneously in the television program designing process; During to the simulation of actual motion object, also can be employed in the related digital cartoon synthetic technology of digital cartoon process field through the digital cartoon The Realization of Simulation usually at needs, the television program designing field of special needs is particularly arranged at some; This type of technology is just more extensive, as in the program of satellites transmits or satellite motion detection type, can experience the visual effect that real satellite flies in order to make spectators in the space; In to the environmental simulation of the earth external space, the more important thing is to give correct simulation to the satellite flight in the space space, but owing to the satellite flight data obtain through real-time monitoring; Need implement to upgrade, therefore can not make, if adopt the field fabrication of satellite flight track simultaneously through the flight effect of having made in advance; According to the data of satellite flight collection point satellite flight is calculated in real time with regard to needing, generate the satellite flight track afterwards, simultaneously; In the manufacturing process of above satellite orbit; Draw and adjustment owing to need calculate in a large number, therefore be difficult to satisfy the synchronous requirement when playing, in the prior art for remedying above deficiency with the satellite flight track; Therefore; As the geography information manufacturing system in adopt usually, the method for drafting of satellite trajectory commonly used is directly to generate a great circle, if regulate the motion path of satellite; Then need the spatial parameter of corresponding adjustment track great circle, efficient is not high.Thereby can't obtain the flight effect of real satellite in the space.
In realizing process of the present invention; The inventor finds that the shortcoming of prior art is: realize lower to the drafting efficient of satellite trajectory through on-site data gathering in the prior art; Utilize the method for drafting that directly generates satellite trajectory simultaneously; If desired the motion path (track) of satellite is regulated, then needed the spatial parameter of corresponding adjustment track, efficient is not high.
Summary of the invention
To the problems of the prior art, the present invention provides a kind of generation method of satellite trajectory, thereby has solved in the prior art, and in the satellite flight animation simulation process, the problem that movement locus effectively generates specifically comprises:
Obtain at least two satellites and pass through a little, said satellite passes through and a little places on the earth model peripheral space;
Pass through the dot generation Bezier according to said satellite;
Obtain at least two Bezier control points according to said Bezier;
According to said Bezier control point and said earth model centre of sphere dot generation plane, said earth model centre of sphere point and said Bezier control point are passed in said plane;
On said plane, be the center with said earth model centre of sphere point, the said Bezier of match simultaneously control point generates the Bezier of satellite trajectory;
Export the Bezier of said satellite trajectory.
Simultaneously, the present invention also provides a kind of generation system of satellite trajectory, specifically comprises: comprising: pass through an acquiring unit, curve generation unit, control point generation unit, plane generation unit, satellite trajectory generation unit, satellite trajectory output unit, wherein,
A said acquiring unit that passes through is used to obtain at least two satellites and passes through a little, and said satellite passes through and a little places on the earth model peripheral space;
Said curve generation unit is used for passing through the dot generation Bezier according to said satellite;
Said control point generation unit is used for obtaining at least two Bezier control points according to said Bezier;
Said plane generation unit is used for according to said Bezier control point and said earth model centre of sphere dot generation plane, and said earth model centre of sphere point and said Bezier control point are passed in said plane;
Said satellite trajectory generation unit is used on said plane, is the center with said earth model centre of sphere point, and the said Bezier of match simultaneously control point generates the Bezier of satellite trajectory;
Said satellite trajectory output unit is used to export the Bezier of said satellite trajectory.
Through above technology, the present invention has realized confirming through two end points the track of satellite, makes things convenient for the adjusting of trajectory parameters, and effect is more intuitively arranged, and can better be associated with satellite motion, thereby is to realize that better the satellite animation is ready.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1: the flow chart that is the generation method of a kind of satellite trajectory in the embodiment of the invention;
Fig. 2: the flow chart that is the generation method of another kind of satellite trajectory in the embodiment of the invention;
Fig. 3: the composition diagram that is a kind of generation system of satellite trajectory in the embodiment of the invention.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obvious described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
A kind of generation method of satellite trajectory is provided in the embodiment of the invention 1, as shown in Figure 1, may further comprise the steps:
S101: obtain satellite and pass through a little:
In this step, obtain at least two satellites and pass through a little, said satellite passes through a little as on the earth model peripheral space; It can be multiple obtaining the mode of passing through a little, also can draw according to the spatial data of reality, afterwards it is imported in the model space;
S102: generate Bezier:
In this step, pass through the dot generation Bezier according to said satellite; Get access to pass through a little after, its quantitative requirement can be more than two, to guarantee the generation precision of the Bezier that generated;
S103: obtain the Bezier control point:
In this step, obtain said at least two Bezier control points according to said Bezier; Can be from the Bezier that is obtained through regenerating or multiple mode obtains four basic fixed position points (comprising: starting point, terminal point, middle two points) of said Bezier; And confirm as the control point thus; Simultaneously also can be through the mode of manual adjustment, to position, said control point adjust,
S104: generate the plane:
In this step, according to said Bezier control point and said earth model centre of sphere dot generation plane, said earth model centre of sphere point and said Bezier control point are passed in said plane;
The control point of passing through to be obtained and the centre of sphere point of earth model can be confirmed a plane, and this plane is divided into two parts with earth model, on the plane after list will guarantee to generate earth model centre of sphere point and said Bezier control point are arranged;
S105: the Bezier that generates satellite trajectory:
In this step, on said plane, be the center with said earth model centre of sphere point, the said Bezier of match simultaneously control point generates the Bezier of satellite trajectory; The Bezier of said satellite trajectory can be closed trajectory;
On the plane that is generated,, generate the satellite flight track through the mode at match Bezier control point;
Therefore, through above step, just on the plane that is generated, refigure a Bezier, and can guarantee that this curve is the flight path that passes satellite, therefore, through satellite being passed through collection a little, has drawn out new satellite flight track.
S106: the Bezier of output satellite trajectory.
In this step, export the Bezier of said satellite trajectory.Output can be multiple mode, can select static the demonstration, can be the path with the Bezier of this satellite trajectory also, generates the effect of satellite in the overhead flight of earth model.
The generation method of another kind of satellite trajectory is provided in the embodiment of the invention 2, as shown in Figure 2, may further comprise the steps:
On the basis of embodiment 1, improvement, preferred mode are proposed in embodiment 2, in the satellite trajectory generative process, obtain better effect thereby make;
S201: obtain satellite and pass through a little: this step is identical with method among the embodiment 1, no longer repeats here to set forth;
S202: generate Bezier:
In this step, pass through the dot generation Bezier according to said satellite; This step of other guide is identical with method among the embodiment 1, no longer repeats here to set forth;
S203: obtain the Bezier control point:
In this step, obtain said at least two Bezier control points according to said Bezier; This step of other guide is identical with method among the embodiment 1, no longer repeats here to set forth;
S204: judge to generate the plane:
In this step, according to said Bezier control point and said earth model centre of sphere dot generation plane, said earth model centre of sphere point and said Bezier control point are passed in said plane;
Judge the quadrant area of 2 said earth model circumferential sections that covered of its furthest in the said Bezier control point, and in said quadrant area, generate the plane;
Well imagine,, use True Data to adjust with regard to needs if hope to obtain the overhead effect of the satellite leap earth very true to nature; Pass through in the process on plane, the earth's core in generation, need very big amount of calculation that related data is adjusted, in order to reduce amount of calculation; Can be through to passing through the mode of an estimation; Position location satellite flies in which zone, only in passing through 1/4 the quadrant on plane, the earth's core, flies like satellite, as long as generate the plane of this quadrant of 1/4; Just can satisfy the needs of follow-up generation track, reduce amount of calculation simultaneously.
S205: generate the Bezier of satellite trajectory, and definite direction of motion;
In this step, on said plane, be the center with said earth model centre of sphere point, the said Bezier of match simultaneously control point generates the Bezier of satellite trajectory; The Bezier of said satellite trajectory can be closed trajectory;
Owing to consider that the reason of satellite flight direction can be confirmed the motion starting point and the terminal point of said satellite trajectory Bezier according to the rotation direction of said earth model in this step after track generates; Afterwards, can realize that said satellite passes through, in this process, accomplish setting simultaneously, practice thrift the Production Time of track animation the animation key frame according to the motion starting point and the terminal point of said Bezier.
S206: the Bezier of output satellite trajectory.
In this step, export the Bezier of said satellite trajectory, this step of other guide is identical with method among the embodiment 1, no longer repeats here to set forth;
A kind of composition diagram of generation system of satellite trajectory is provided in the embodiment of the invention 3, as shown in Figure 3:
Specifically comprise: pass through an acquiring unit 301, curve generation unit 302, control point generation unit 303, plane generation unit 304, satellite trajectory generation unit 305, satellite trajectory output unit 306, wherein,
The said acquiring unit 301 that passes through is used to obtain at least two satellites and passes through a little, and said satellite passes through a little as on the earth model peripheral space;
Said curve generation unit 302 is used for passing through the dot generation Bezier according to said satellite;
Said control point generation unit 303 is used for obtaining said at least two Bezier control points according to said Bezier;
Said plane generation unit 304 is used for according to said Bezier control point and said earth model centre of sphere dot generation plane, and said earth model centre of sphere point and said Bezier control point are passed in said plane;
Also be used for: judge the quadrant area of 2 said earth model circumferential sections that covered of its furthest of said Bezier control point, and in said quadrant area, generate the plane.
Said satellite trajectory generation unit 305 is used on said plane, is the center with said earth model centre of sphere point, and the said Bezier of match simultaneously control point generates the Bezier of satellite trajectory;
Said satellite trajectory output unit 306 is used to export the Bezier of said satellite trajectory;
The Bezier of the said satellite trajectory in the said satellite trajectory generation unit can be closed trajectory.
Said satellite trajectory generation unit also comprises, direction of motion generation unit 3061, and said direction of motion generation unit is used for the rotation direction according to said earth model, confirms the motion starting point and the terminal point of said satellite trajectory Bezier; Motion starting point and terminal point according to said Bezier realize that said satellite passes through.
Through the description of above execution mode, those skilled in the art can be well understood to the present invention and can realize through hardware, also can realize by the mode that software adds necessary general hardware platform.Based on such understanding; Technical scheme of the present invention can be come out with the embodied of software product, this software product can be stored in a non-volatile memory medium (can be CD-ROM, USB flash disk; Portable hard drive etc.) in; Comprise some instructions with so that computer equipment (can be personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.
It will be appreciated by those skilled in the art that accompanying drawing is the sketch map of a preferred embodiment, module in the accompanying drawing or flow process might not be that embodiment of the present invention is necessary.
It will be appreciated by those skilled in the art that the module in the device among the embodiment can be distributed in the device of embodiment according to the embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from present embodiment.The module of the foregoing description can be merged into a module, also can further split into a plurality of submodules.
The invention described above embodiment sequence number is not represented the quality of embodiment just to description.
More than disclosedly be merely several specific embodiment of the present invention, still, the present invention is not limited thereto, any those skilled in the art can think variation all should fall into protection scope of the present invention.
Claims (9)
1. the generation method of a satellite trajectory comprises, in the model space, imports earth model, it is characterized in that,
Obtain at least two satellites and pass through a little, said satellite passes through and a little places on the earth model peripheral space;
Pass through the dot generation Bezier according to said satellite;
Obtain at least two Bezier control points according to said Bezier;
According to said Bezier control point and said earth model centre of sphere dot generation plane, said earth model centre of sphere point and said Bezier control point are passed in said plane;
On said plane, be the center with said earth model centre of sphere point, the said Bezier of match simultaneously control point generates the Bezier of satellite trajectory;
Export the Bezier of said satellite trajectory.
2. the method described in claim 1 is characterized in that, the Bezier of said satellite trajectory is a closed trajectory.
3. the method described in claim 1 is characterized in that, and is said on said plane, is the center with said earth model centre of sphere point, can also comprise after the said Bezier of match simultaneously control point generates satellite trajectory Bezier step:
According to the rotation direction of said earth model, confirm the motion starting point and the terminal point of said satellite trajectory Bezier.
4. the method described in claim 3 is characterized in that, the Bezier of the said satellite trajectory of said output can also comprise:
Motion starting point and terminal point according to said Bezier realize that said satellite passes through.
5. the method described in claim 1 is characterized in that, said according to said Bezier control point and said earth model centre of sphere dot generation plane step specifically can for:
Judge the quadrant area of 2 said earth model circumferential sections that covered of its furthest in the said Bezier control point, and in said quadrant area, generate the plane.
6. the generation system of a satellite trajectory is characterized in that, comprising: pass through an acquiring unit, curve generation unit, control point generation unit, plane generation unit, satellite trajectory generation unit, satellite trajectory output unit, wherein,
A said acquiring unit that passes through is used to obtain at least two satellites and passes through a little, and said satellite passes through and a little places on the earth model peripheral space;
Said curve generation unit is used for passing through the dot generation Bezier according to said satellite;
Said control point generation unit is used for obtaining at least two Bezier control points according to said Bezier;
Said plane generation unit is used for according to said Bezier control point and said earth model centre of sphere dot generation plane, and said earth model centre of sphere point and said Bezier control point are passed in said plane;
Said satellite trajectory generation unit is used on said plane, is the center with said earth model centre of sphere point, and the said Bezier of match simultaneously control point generates the Bezier of satellite trajectory;
Said satellite trajectory output unit is used to export the Bezier of said satellite trajectory.
7. the system described in claim 6 is characterized in that, the Bezier of the said satellite trajectory in the said satellite trajectory generation unit can be closed trajectory.
8. the system described in claim 6 is characterized in that, said satellite trajectory generation unit also comprises; Direction of motion generation unit; Said direction of motion generation unit is used for the rotation direction according to said earth model, confirms the motion starting point and the terminal point of said satellite trajectory Bezier; Motion starting point and terminal point according to said Bezier realize that said satellite passes through.
9. the system described in claim 6; It is characterized in that; Said plane generation unit also is used for: judge the quadrant area of 2 said earth model circumferential sections that covered of its furthest of said Bezier control point, and in said quadrant area, generate the plane.
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| CN104318600A (en) * | 2014-10-10 | 2015-01-28 | 无锡梵天信息技术股份有限公司 | Method for achieving role treading track animation by using Bezier curve |
| CN105354870A (en) * | 2015-10-21 | 2016-02-24 | 新奥特（北京）视频技术有限公司 | Restoration method and apparatus for drawn track |
| CN116227195A (en) * | 2023-03-02 | 2023-06-06 | 北京国星创图科技有限公司 | Method for correcting real-time state of simulation space environment |
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| CN102129710A (en) * | 2010-12-30 | 2011-07-20 | 北京像素软件科技股份有限公司 | Method and system for simulating flight path |
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| US20060015247A1 (en) * | 2004-07-07 | 2006-01-19 | The Boeing Company | Bezier curve flightpath guidance using moving waypoints |
| CN101535832A (en) * | 2006-11-10 | 2009-09-16 | 高通股份有限公司 | Method and apparatus for position determination with extended SPS orbit information |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104318600A (en) * | 2014-10-10 | 2015-01-28 | 无锡梵天信息技术股份有限公司 | Method for achieving role treading track animation by using Bezier curve |
| CN104318600B (en) * | 2014-10-10 | 2018-01-16 | 无锡梵天信息技术股份有限公司 | A kind of method that role's run trace animation is realized using Bézier curve |
| CN105354870A (en) * | 2015-10-21 | 2016-02-24 | 新奥特（北京）视频技术有限公司 | Restoration method and apparatus for drawn track |
| CN116227195A (en) * | 2023-03-02 | 2023-06-06 | 北京国星创图科技有限公司 | Method for correcting real-time state of simulation space environment |
| CN116227195B (en) * | 2023-03-02 | 2023-11-03 | 北京国星创图科技有限公司 | Method for correcting real-time state of simulation space environment |
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