CN102169595B - A kind of many arrowhead path animation implementation methods and device - Google Patents
A kind of many arrowhead path animation implementation methods and device Download PDFInfo
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- CN102169595B CN102169595B CN201010116501.8A CN201010116501A CN102169595B CN 102169595 B CN102169595 B CN 102169595B CN 201010116501 A CN201010116501 A CN 201010116501A CN 102169595 B CN102169595 B CN 102169595B
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Abstract
The invention provides a kind of method realizing many arrowhead path animations, comprising: obtain the Bezier that preset path is formed; Obtain the many arrows on the Bezier of preset path formation; Interpolation processing is done to the arrow summit on Bezier; Realize many arrowhead path animations.Many arrowhead path animation implementation methods that the inventive method embodiment provides, by doing interpolation processing to the arrow summit on Bezier, realize many arrowhead path animations, the method does interpolation processing relative to needing in prior art to multiple arrow artwork, and the method realizing many arrowhead path animations is more simple.
Description
Technical field
The present invention relates to animation design technique field, particularly relate to a kind of many arrowhead path animation implementation methods and device.
Background technology
In present weather forecast, usually need to use arrow animation for representing the movement of satellite cloud layer, the trend of storm, the trend of cold current, such arrow animation can think that spectators present more intuitive weather information.
When setting up many arrowhead path animations in the prior art, such as, when setting up the moving towards of cold current, realize by the following method: make arrow artwork one by one in the position that cold current moves towards on curve in advance, each arrow artwork moves towards an element on curve as cold current; Afterwards interpolation processing is done to multiple arrow artwork, realize many arrow animations.Adopt said method to realize many arrow animations, need to carry out editing and processing respectively to multiple arrow artwork, such complicated operation.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of many arrowhead path animation implementation methods, can realize many arrowhead path animations easily, user-friendly.
In order to solve the problem, the invention discloses a kind of many arrowhead path animation implementation methods, comprising:
Obtain the Bezier that preset path is formed;
Obtain the many arrows on the Bezier of preset path formation;
Interpolation processing is done to the arrow summit on Bezier;
Realize many arrowhead path animations.
Further, the multiple arrows obtained on the Bezier of preset path formation comprise:
The one group of arrow created is pasted on the Bezier of described preset path formation.
Further, the multiple arrows obtained on the Bezier of preset path formation comprise:
The Bezier that preset path is formed creates start arrow;
The Bezier that preset path is formed creates second arrow, and the terminal vertex of described second arrow and the forward end apex of start arrow are separated by preset length, and namely arrow is spaced apart preset length;
The Bezier that preset path is formed sequentially sets up multiple arrow, to the last the forward end apex of an arrow to the distance of curve end lower than preset length.
Further, interpolation processing is done to the arrow summit dropped on Bezier, comprising:
Preset create multiple arrows between be spaced apart fixed value;
Interpolation processing is done to the reference position of start arrow in multiple arrow;
Realize many arrowhead path animations.
Further, interpolation processing is done to the arrow summit dropped on Bezier, comprising:
Interpolation processing is done to the interval between multiple arrow;
Realize many arrowhead path animations.
Further, interpolation processing is done to the arrow summit dropped on Bezier, comprising:
Obtain the arrow interval and arrow length of presetting;
Obtain underlying parameter value, described underlying parameter value equals arrow interval and arrow length sum;
Input regulating parameter value;
Obtain move distance parameter value, described move distance equals regulating parameter value and underlying parameter value to be done remainder and operates the value obtained;
The distance arranging same first arrow of Bezier reference position that preset path is formed is motion parameter;
Interpolation processing is done to motion parameter, realizes many arrowhead path animations.
Further, the Bezier of preset path formation creates arrow to comprise:
Determine 8 summits forming arrow, i.e. summit 1...8, described summit 1 is arrow terminal vertex, and summit 2 is arrowhead nose summit;
8 summits according to arrow build 6 tri patchs: tri patch 1-5-7, tri patch 1-6-8, tri patch 1-5-6, tri patch 2-4-5, tri patch 2-3-6, tri patch 2-5-6;
The tri patch of described structure is integrated and plays up, obtain an arrow.
Further, the arrow length of establishment is equal, and namely the terminal vertex of each arrow is equal to the distance of the forward end apex of this arrow.
Further, determine that 8 summits forming arrow comprise the steps:
The Bezier that preset path is formed selects first group of discrete point;
Preset the coordinate of two initial points, namely input the coordinate of the first coordinate points and the second coordinate points, wherein the first coordinate points is the point in described first group of discrete point, and the first coordinate points is the 1st summit of single arrow;
Determine the 2nd summit of single arrow according to the transverse axis value on the 1st summit and the longitudinal axis value of the second coordinate points, described 2nd summit is the point in first group of discrete point;
Single arrow the 3rd apex coordinate value is obtained according to the transverse axis value of central point A of the 1st summit and the 2nd summit line and the longitudinal axis value of the second coordinate points;
According to the coordinate figure of the 3rd apex coordinate value and central point A, obtain single arrow the 4th apex coordinate value;
By the connecting line decile of the 4th summit isocenter A, obtain single arrow the 5th apex coordinate value;
By the connecting line decile of the 3rd summit isocenter A, obtain single arrow the 6th apex coordinate value;
The 7th apex coordinate of single arrow is determined according to the transverse axis value on the 1st summit and the longitudinal axis value on the 5th summit;
The 8th apex coordinate of single arrow is determined according to the transverse axis value on the 1st summit and the longitudinal axis value on the 6th summit.
The embodiment of the present invention additionally provides a kind of device realizing many arrowhead path animations, comprising:
First acquiring unit, for obtaining the Bezier that preset path is formed;
Second acquisition unit, the many arrows on the Bezier obtaining preset path formation;
Processing unit, for doing interpolation processing to the arrow summit on Bezier, realizes many arrowhead path animations.
Compared with prior art, the present invention has the following advantages:
Many arrowhead path animation implementation methods that the inventive method embodiment provides, by doing interpolation processing to the arrow summit on Bezier, realize many arrowhead path animations, the method does interpolation processing relative to needing in prior art to multiple arrow artwork, and the method realizing many arrowhead path animations is more simple.
Further, the single arrow created in the inventive method embodiment can be played up by tri patch and obtain, when amplifying arrow, because the design feature of tri patch, overcome fuzzy, the rough problem in edge of arrow display that single arrow of picture format in prior art exists after amplifying.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of the inventive method embodiment one;
Fig. 2 is the process flow diagram creating single arrow in the inventive method embodiment two;
Fig. 3 is the process flow diagram in the inventive method embodiment three, the arrow summit dropped on Bezier being done to interpolation process method;
Fig. 4 is the process flow diagram of the another kind of method in the inventive method embodiment three, the arrow summit dropped on Bezier being done to interpolation processing;
Fig. 5 is the structural representation of apparatus of the present invention embodiment four;
Fig. 6 is the many arrow path display effect figure adopting the inventive method to realize;
Fig. 7 is the many arrow path schematic diagram adopting the inventive method to realize.
Embodiment
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, and below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Embodiment one
Present embodiment illustrates a kind of process flow diagram realizing many arrowhead path animations embodiment of the method one of the present invention, see Fig. 1, comprising:
Step 101, obtains the Bezier that preset path is formed;
In actual applications, such as, in weather forecast, need to use arrow animation for representing the movement of satellite cloud layer, the trend of storm, the trend of cold current, such arrow animation can think that spectators present more intuitive weather information.When implementing this step, can obtain by reading weather data the route that cloud layer moves or storm moves towards, just can make the path of cloud layer movement after being aware of the route of cloud layer movement, this path can be represented by the mode of Bezier.
Step 102, obtains the many arrows on the Bezier of preset path formation;
Can according to cloud layer path trend in the weather data read, make one group of arrow, the trend of this group arrow follows cloud layer path trend, on the Bezier that the cloud atlas path this group arrow being pasted acquisition is formed, so just can obtain the many arrows on the Bezier of preset path formation.Certainly, in actual applications, also oneself can create many arrows, this mode specifically can comprise the steps:
The Bezier that preset path is formed creates start arrow;
The Bezier that preset path is formed creates second arrow, and the terminal vertex of described second arrow and the forward end apex of start arrow are separated by preset length, and namely arrow is spaced apart preset length;
The Bezier that preset path is formed sequentially sets up multiple arrow, to the last the forward end apex of an arrow to the distance of curve end lower than preset length.
The step oneself creating many arrows is described above, in embodiment two below, will by way of example, and specifically describe and how to create arrow.
Step 103, does interpolation processing to the arrow summit on Bezier; Realize many arrowhead path animations.
Method of interpolation is also known as " interpolation method ".Utilize the functional value of function some points in certain interval, make suitable specific function, these aspects get given value, by the approximate value of the value of this specific function as function on other aspects in interval, this method is called method of interpolation.If this specific function is polynomial expression, it is just claimed to be interpolation polynomial.Utilize method of interpolation to choose coordinate points and have multiple way of realization, it belongs to known technology field, and the present invention does not limit at this.
Many arrowhead path animation implementation methods that the inventive method embodiment provides, by doing interpolation processing to the arrow summit on Bezier, realize many arrowhead path animations, the method does interpolation processing relative to needing in prior art to multiple arrow artwork, and the method realizing many arrowhead path animations is more simple.
Embodiment two
How on the Bezier of preset path formation, arrow is created by specifically describing in the present embodiment.The Bezier that preset path is formed creates a single arrow can comprise the steps (see Fig. 2):
Step 201, determines 8 summits forming single arrow, i.e. summit 1...8, and described summit 1 is this arrow terminal vertex, and summit 2 is this arrowhead nose summit;
Further, when embodiment step 201, determine that 8 summits forming arrow can comprise the steps:
The Bezier that preset path is formed selects first group of discrete point;
Preset the coordinate of two initial points, namely input the coordinate of the first coordinate points and the second coordinate points, wherein the first coordinate points is the point in described first group of discrete point, and the first coordinate points is the 1st summit of single arrow;
Determine the 2nd summit of single arrow according to the transverse axis value on the 1st summit and the longitudinal axis value of the second coordinate points, described 2nd summit is the point in first group of discrete point;
Single arrow the 3rd apex coordinate value is obtained according to the transverse axis value of central point A of the 1st summit and the 2nd summit line and the longitudinal axis value of the second coordinate points;
According to the coordinate figure of the 3rd apex coordinate value and central point A, obtain single arrow the 4th apex coordinate value;
By the connecting line decile of the 4th summit isocenter A, obtain single arrow the 5th apex coordinate value;
By the connecting line decile of the 3rd summit isocenter A, obtain single arrow the 6th apex coordinate value;
The 7th apex coordinate of single arrow is determined according to the transverse axis value on the 1st summit and the longitudinal axis value on the 5th summit;
The 8th apex coordinate of single arrow is determined according to the transverse axis value on the 1st summit and the longitudinal axis value on the 6th summit.
Step 202,8 summits according to single arrow build 6 tri patchs: tri patch 1-5-7, tri patch 1-6-8, tri patch 1-5-6, tri patch 2-4-5, tri patch 2-3-6, tri patch 2-5-6;
Step 203, integrates the tri patch of described structure and plays up, obtain a single arrow.
According to the mode of above-mentioned establishment list arrow, the Bezier that preset path is formed can sequentially create multiple single arrow.Preset path mentioned here can be according to cloud layer path in the weather data read.When embodiment the present embodiment, multiple arrow length of establishment can be equal, and namely the terminal vertex of each arrow is equal to the distance of the forward end apex of this arrow.
The single arrow created in the inventive method embodiment can obtain by integrating to play up to tri patch, when amplifying arrow, because the design feature of tri patch, overcome fuzzy, the rough problem in edge of arrow display that single arrow of picture format in prior art exists after amplifying.
Can understand how on the Bezier of preset path formation, to create many arrows by above-described embodiment two, after many arrow establishments are complete, need to make many arrows produce animation effect and just can complete object of the present invention.The following examples will introduce the mode making many arrows generate animation.
Embodiment three
In the step 103 that embodiment is a kind of, describe and by doing interpolation processing to the arrow summit on Bezier, and then many arrowhead path animations can be realized.The present embodiment does the method for interpolation processing by introducing a kind of arrow summit to dropping on Bezier, see Fig. 3, the method can comprise the steps:
Step 301, preset create multiple arrows between be spaced apart fixed value;
Step 302, does interpolation processing to the reference position of start arrow in multiple arrow; Realize many arrowhead path animations.
In actual applications, also can realize doing interpolation processing to the arrow summit dropped on Bezier by following manner, the method can comprise the steps:
Interpolation processing is done to the interval between multiple arrow; Realize many arrowhead path animations.
In actual applications, can also realize doing interpolation processing to the arrow summit dropped on Bezier by following manner, see Fig. 4, the method can comprise the steps:
Step 401, obtains the arrow interval and arrow length of presetting;
In actual applications, arrow interval can be the distance between the multiple arrows in preset path, can be specifically the distance of forward end apex to the terminal vertex of previous arrow of a rear arrow, the forward end apex of the arrow in preset path mentioned here and terminal vertex drop on the Bezier of preset path formation.Arrow length can be the length of terminal vertex to self forward end apex of a single arrow.
Step 402, obtain underlying parameter value, described underlying parameter value equals arrow interval and arrow length sum;
Step 403, input regulating parameter value;
Before needs generate animation, user can input a regulating parameter value by interactive interface; It can certainly be user preset regulating parameter value.
Step 404, obtains move distance parameter value, and described move distance equals regulating parameter value and underlying parameter value to be done remainder and operate the value obtained;
Step 405, the distance arranging same first arrow of Bezier reference position that preset path is formed is motion parameter;
When implementing this step, in this step, using the method for remainder, can be implemented in the animation effect of the multiple arrow shuttling movements on the Bezier of preset path formation.When arranging, can preset regulating parameter value, the distance of the terminal vertex of first arrow on the Bezier that the reference position of the Bezier that preset path was formed was formed with preset path is no more than the length of an arrow.The continuity that can make to ensure multiple arrow in many arrow animations effect is set like this.
Step 406, does interpolation processing to motion parameter, realizes many arrowhead path animations.
Many arrowhead path animations can be realized by above-mentioned embodiment of the method, in order to get more information about the situation of above-described embodiment, many arrow path display effect figure that can realize see the inventive method shown in Fig. 6; With many arrow path schematic diagram that the employing the inventive method shown in Fig. 7 realizes.
Embodiment four
Present invention also offers a kind of device realizing many arrowhead path animations, see Fig. 5, can comprise:
First acquiring unit 501, for obtaining the Bezier that preset path is formed;
Second acquisition unit 502, the many arrows on the Bezier obtaining preset path formation;
Processing unit 503, for doing interpolation processing to the arrow summit on Bezier, realizes many arrowhead path animations.
Each embodiment in this instructions all adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar part mutually see.
Above to the many arrowhead path animation implementation methods of one provided by the present invention and device, be described in detail, apply specific case herein to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (8)
1. realize a method for many arrowhead path animations, it is characterized in that, comprising:
Obtain the Bezier that preset path is formed;
Obtain the many arrows on the Bezier of preset path formation;
Interpolation processing is done to the arrow summit on Bezier;
Interpolation processing is done on the described arrow summit to dropping on Bezier, comprising:
Obtain the arrow interval and arrow length of presetting;
Obtain underlying parameter value, described underlying parameter value equals arrow interval and arrow length sum;
Input regulating parameter value;
Obtain move distance parameter value, described move distance parameter value equals regulating parameter value and underlying parameter value to be done remainder and operates the value obtained;
The distance arranging same first arrow of Bezier reference position that preset path is formed is move distance parameter value;
Interpolation processing is done to move distance parameter value;
Realize many arrowhead path animations.
2. method according to claim 1, is characterized in that, the multiple arrows on the Bezier that described acquisition preset path is formed comprise:
The one group of arrow created is pasted on the Bezier of described preset path formation.
3. method according to claim 1, is characterized in that, the multiple arrows on the Bezier that described acquisition preset path is formed comprise:
The Bezier that preset path is formed creates start arrow;
The Bezier that preset path is formed creates second arrow, and the terminal vertex of described second arrow and the forward end apex of start arrow are separated by preset length, and namely arrow is spaced apart preset length;
The Bezier that preset path is formed sequentially sets up multiple arrow, to the last the forward end apex of an arrow to the distance of curve end lower than preset length.
4. method according to claim 1, is characterized in that, interpolation processing is done on the described arrow summit to dropping on Bezier, comprising:
Preset create multiple arrows between be spaced apart fixed value;
Interpolation processing is done to the reference position of start arrow in multiple arrow;
Realize many arrowhead path animations.
5. method according to claim 1, is characterized in that, interpolation processing is done on the described arrow summit to dropping on Bezier, comprising:
Interpolation processing is done to the interval between multiple arrow;
Realize many arrowhead path animations.
6. method according to claim 3, is characterized in that, the Bezier that preset path is formed creates arrow and comprises:
Determine 8 summits forming arrow, i.e. summit 1 ... 8, described summit 1 is arrow terminal vertex, and summit 2 is arrowhead nose summit;
8 summits according to arrow build 6 tri patchs: tri patch 1-5-7, tri patch 1-6-8, tri patch 1-5-6, tri patch 2-4-5, tri patch 2-3-6, tri patch 2-5-6;
The tri patch of described structure is integrated and plays up, obtain an arrow.
7. method according to claim 6, is characterized in that, the arrow length of described establishment is equal, and namely the terminal vertex of each arrow is equal to the distance of the forward end apex of this arrow.
8. realize a device for many arrowhead path animations, it is characterized in that, comprising:
First acquiring unit, for obtaining the Bezier that preset path is formed;
Second acquisition unit, the many arrows on the Bezier obtaining preset path formation;
Processing unit, for doing interpolation processing to the arrow summit on Bezier, interpolation processing is done on the described arrow summit to dropping on Bezier, comprising:
Obtain the arrow interval and arrow length of presetting;
Obtain underlying parameter value, described underlying parameter value equals arrow interval and arrow length sum;
Input regulating parameter value;
Obtain move distance parameter value, described move distance parameter value equals regulating parameter value and underlying parameter value to be done remainder and operates the value obtained;
The distance arranging same first arrow of Bezier reference position that preset path is formed is move distance parameter value;
Interpolation processing is done to move distance parameter value;
Realize many arrowhead path animations.
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| CN105719330B (en) * | 2014-12-05 | 2020-07-28 | 腾讯科技（北京）有限公司 | Animation curve generation method and device |
| CN110648402A (en) * | 2019-09-29 | 2020-01-03 | 北京金山安全软件有限公司 | Method, device and equipment for placing virtual object along curve |
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