CN102169595A - Multi-arrowhead path animation implementation method and device - Google Patents
Multi-arrowhead path animation implementation method and device Download PDFInfo
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- CN102169595A CN102169595A CN2010101165018A CN201010116501A CN102169595A CN 102169595 A CN102169595 A CN 102169595A CN 2010101165018 A CN2010101165018 A CN 2010101165018A CN 201010116501 A CN201010116501 A CN 201010116501A CN 102169595 A CN102169595 A CN 102169595A
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Abstract
The invention provides a multi-arrowhead path animation implementation method which includes the steps of acquiring a Bessel curve formed by a preset path; acquiring the arrowheads of the Bessel curve formed by the preset path; carrying out an interpolation process to the arrowhead vertexes of the Bessel curve; and realizing a multi-arrowhead path animation. The multi-arrowhead path animation implementation method provided by the embodiment of the invention realizes the multi-arrowhead path animation by carrying out the interpolation process to the arrowhead vertexes of the Bessel curve. The method is more simple in operation compared with the prior art which realizes the multi-arrowhead path animation by carrying out the interpolation process to a plurality of arrowhead pictures.
Description
Technical field
The present invention relates to the animation design technique field, particularly relate to a kind of many arrows path animation implementation method and device.
Background technology
In present weather forecast, usually need to use the arrow animation to be used to represent moving 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 arrows path animation in the prior art, for example, 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 the curve in advance, each arrow artwork is moved towards a element on the curve as cold current; Afterwards a plurality of arrow artwork are done interpolation processing, realize many arrows animation.Adopt said method to realize many arrows animation, need carry out editing and processing, complicated operation so respectively a plurality of arrow artwork.
Summary of the invention
Technical matters to be solved by this invention provides a kind of many arrows path animation implementation method, can realize many arrows path animation easily, and is user-friendly.
In order to address the above problem, the invention discloses a kind of many arrows path animation implementation method, comprising:
Obtain the Bezier that preset path forms;
Obtain the many arrows on the Bezier that preset path forms;
Interpolation processing is done on arrow summit on the Bezier;
Realize many arrows path animation.
Further, a plurality of arrows that obtain on the Bezier that preset path forms comprise:
One group of arrow creating is pasted on the Bezier of described preset path formation.
Further, a plurality of arrows that obtain on the Bezier that preset path forms comprise:
On the Bezier that preset path forms, create start arrow;
On the Bezier that preset path forms, create second arrow, the terminal vertex of described second arrow and the forward end apex of the start arrow preset length of being separated by, promptly arrow is spaced apart preset length;
Set up a plurality of arrows in regular turn on the Bezier that preset path forms, to the last the forward end apex of an arrow is lower than preset length to the distance of curve end.
Further, interpolation processing is done on the arrow summit of dropping on the Bezier, being comprised:
Preset the fixed value that is spaced apart between a plurality of arrows of creating;
Reference position to start arrow in a plurality of arrows is done interpolation processing;
Realize many arrows path animation.
Further, interpolation processing is done on the arrow summit of dropping on the Bezier, being comprised:
Interpolation processing is done at interval between a plurality of arrows;
Realize many arrows path animation.
Further, interpolation processing is done on the arrow summit of dropping on the Bezier, being comprised:
Obtain default arrow interval and arrow length;
Obtain the underlying parameter value, described underlying parameter value equals arrow interval and arrow length sum;
Parameter value is regulated in input;
Obtain the move distance parameter value, described move distance equals to regulate parameter value and underlying parameter value to be done and gets the value that surplus operation obtains;
It is the kinematic parameter value with the distance of first arrow that Bezier reference position that preset path forms is set;
The kinematic parameter value is done interpolation processing, realize many arrows path animation.
Further, creating arrow on the Bezier that preset path forms comprises:
Determine to constitute 8 summits of arrow, i.e. summit 1...8, described summit 1 is the arrow terminal vertex, summit 2 is the arrow forward end apex;
8 summits according to arrow make up 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 integration of described structure is played up, obtain an arrow.
Further, the arrow length of establishment equates that promptly the terminal vertex of each arrow equates to the distance of the forward end apex of this arrow.
Further, determine that 8 summits that constitute arrow comprise the steps:
On the Bezier that preset path forms, select first group of discrete point;
Preset the coordinate of two initial points, promptly import the coordinate of first coordinate points and second coordinate points, wherein first coordinate points is the point in described first group of discrete point, and first coordinate points is the 1st summit of single arrow;
Determine the 2nd summit of single arrow according to the longitudinal axis value of the transverse axis value on the 1st summit and second coordinate points, described the 2nd summit is the point in first group of discrete point;
Obtain single arrow the 3rd apex coordinate value according to the transverse axis value of the central point A of the 1st summit and the 2nd summit line and the longitudinal axis value of 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;
With the connecting line five equilibrium of the 4th summit isocenter A, obtain single arrow the 5th apex coordinate value;
With the connecting line five equilibrium of the 3rd summit isocenter A, obtain single arrow the 6th apex coordinate value;
Determine the 7th apex coordinate of single arrow according to the longitudinal axis value on the transverse axis value on the 1st summit and the 5th summit;
Determine the 8th apex coordinate of single arrow according to the longitudinal axis value on the transverse axis value on the 1st summit and the 6th summit.
The embodiment of the invention also provides a kind of device of realizing many arrows path animation, comprising:
First acquiring unit is used to obtain the Bezier that preset path forms;
Second acquisition unit is used to obtain the many arrows on the Bezier that preset path forms;
Processing unit is used for interpolation processing is done on the arrow summit on the Bezier, realizes many arrows path animation.
Compared with prior art, the present invention has the following advantages:
Many arrows path animation implementation method that the inventive method embodiment provides, by interpolation processing is done on the arrow summit on the Bezier, realize many arrows path animation, this method is done interpolation processing with respect to needing in the prior art to a plurality of arrow artwork, realizes that the method for many arrows path animation is more simple.
Further, single arrow of creating among the inventive method embodiment can be played up by tri patch and obtain, when amplifying arrow, because the design feature of tri patch has overcome the arrow that exists after single arrow of picture format amplifies in the prior art and has shown fuzzy, the rough problem in edge.
Description of drawings
Fig. 1 is the process flow diagram of the inventive method embodiment one;
Fig. 2 is a process flow diagram of creating single arrow among the inventive method embodiment two;
Fig. 3 does the process flow diagram of interpolation process method to dropping on arrow summit on the Bezier among the inventive method embodiment three;
Fig. 4 does the process flow diagram of the another kind of method of interpolation processing to dropping on arrow summit on the Bezier among the inventive method embodiment three;
Fig. 5 is the structural representation of apparatus of the present invention embodiment four;
Fig. 6 is the many arrows path display effect figure that adopts the inventive method to realize;
Fig. 7 is the many arrows path synoptic diagram that adopts the inventive method to realize.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Embodiment one
Present embodiment shows a kind of process flow diagram of realizing many arrows path animation method embodiment one of the present invention, referring to Fig. 1, comprising:
Step 101 is obtained the Bezier that preset path forms;
In actual applications, for example in weather forecast, need use the arrow animation and be used to represent moving 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 that cloud layer moves or the route of storm trend by reading weather data, just can make the path that cloud layer moves after having known the route that cloud layer moves, this path can be represented by the mode of Bezier.
Step 102 is obtained the many arrows on the Bezier that preset path forms;
Can be according to cloud layer path trend in the weather data that reads, make one group of arrow, the trend of this group arrow is followed cloud layer path trend, this group arrow is pasted on the Bezier that the cloud atlas path that obtains forms, so just can obtain the many arrows on the Bezier of preset path formation.Certainly, in actual applications, also can oneself create many arrows, this mode specifically can comprise the steps:
On the Bezier that preset path forms, create start arrow;
On the Bezier that preset path forms, create second arrow, the terminal vertex of described second arrow and the forward end apex of the start arrow preset length of being separated by, promptly arrow is spaced apart preset length;
Set up a plurality of arrows in regular turn on the Bezier that preset path forms, to the last the forward end apex of an arrow is lower than preset length to the distance of curve end.
Oneself create the step of many arrows and described in the above, among the embodiment two below, will by way of example, how specific descriptions create arrow.
Step 103 is done interpolation processing to the arrow summit on the Bezier; Realize many arrows path animation.
Method of interpolation claims " interpolation method " again.Utilize the functional value of function some points in certain interval, make suitable specific function, get given value on these aspects, with the value of this specific function approximate value as function, this method is called method of interpolation on other aspects in interval.If this specific function is a polynomial expression, just claim that it is an interpolation polynomial.Utilizing method of interpolation to choose coordinate points has multiple way of realization, and it belongs to the known technology field, and the present invention does not do qualification at this.
Many arrows path animation implementation method that the inventive method embodiment provides, by interpolation processing is done on the arrow summit on the Bezier, realize many arrows path animation, this method is done interpolation processing with respect to needing in the prior art to a plurality of arrow artwork, realizes that the method for many arrows path animation is more simple.
Embodiment two
To specifically describe in the present embodiment and how on the Bezier that preset path forms, to create arrow.On the Bezier that preset path forms, create a single arrow and can comprise the steps (referring to Fig. 2):
Step 201 determine to constitute 8 summits of single arrow, i.e. summit 1...8, and described summit 1 is this arrow terminal vertex, summit 2 is this arrow forward end apex;
Further, when embodiment step 201, determine that 8 summits that constitute arrow can comprise the steps:
On the Bezier that preset path forms, select first group of discrete point;
Preset the coordinate of two initial points, promptly import the coordinate of first coordinate points and second coordinate points, wherein first coordinate points is the point in described first group of discrete point, and first coordinate points is the 1st summit of single arrow;
Determine the 2nd summit of single arrow according to the longitudinal axis value of the transverse axis value on the 1st summit and second coordinate points, described the 2nd summit is the point in first group of discrete point;
Obtain single arrow the 3rd apex coordinate value according to the transverse axis value of the central point A of the 1st summit and the 2nd summit line and the longitudinal axis value of 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;
With the connecting line five equilibrium of the 4th summit isocenter A, obtain single arrow the 5th apex coordinate value;
With the connecting line five equilibrium of the 3rd summit isocenter A, obtain single arrow the 6th apex coordinate value;
Determine the 7th apex coordinate of single arrow according to the longitudinal axis value on the transverse axis value on the 1st summit and the 5th summit;
Determine the 8th apex coordinate of single arrow according to the longitudinal axis value on the transverse axis value on the 1st summit and the 6th summit.
Step 203 is played up the tri patch integration of described structure, obtains a single arrow.
Can on the Bezier that preset path forms, create a plurality of single arrows in regular turn according to the mode of the single arrow of above-mentioned establishment.Here said preset path can be according to cloud layer path in the weather data that reads.When the embodiment present embodiment, a plurality of arrow length of establishment can equate that promptly the terminal vertex of each arrow equates to the distance of the forward end apex of this arrow.
Single arrow of creating among the inventive method embodiment can obtain by tri patch is integrated to play up, when amplifying arrow, because the design feature of tri patch has overcome the arrow that exists after single arrow of picture format amplifies in the prior art and has shown fuzzy, the rough problem in edge.
Can understand how on the Bezier that preset path forms, to create many arrows by the foregoing description two, after many arrows are created and finished, need make many arrows produce animation effect and just can finish purpose of the present invention.The following examples make many arrows generate the mode of animation introduction.
Embodiment three
In a kind of step 103 of embodiment, having introduced can be by doing interpolation processing to the arrow summit on the Bezier, and then realizes many arrows path animation.Present embodiment will be introduced and a kind ofly do the method for interpolation processing to dropping on arrow summit on the Bezier, and referring to Fig. 3, this method can comprise the steps:
Step 301 is preset the fixed value that is spaced apart between a plurality of arrows of creating;
Step 302 is done interpolation processing to the reference position of start arrow in a plurality of arrows; Realize many arrows path animation.
In actual applications, also can realize interpolation processing is done on the arrow summit of dropping on the Bezier by following manner, this method can comprise the steps:
Interpolation processing is done at interval between a plurality of arrows; Realize many arrows path animation.
In actual applications, can also realize interpolation processing is done on the arrow summit of dropping on the Bezier by following manner, referring to Fig. 4, this method can comprise the steps:
Step 401 is obtained default arrow interval and arrow length;
In actual applications, arrow can be the distance between a plurality of arrows on the preset path at interval, specifically can be the distance of the forward end apex of a back arrow to the terminal vertex of previous arrow, the forward end apex of the arrow on the said here preset path and terminal vertex drop on the Bezier of preset path formation.Arrow length can be the length of the terminal vertex of a single arrow to self forward end apex.
Step 402 is obtained the underlying parameter value, and described underlying parameter value equals arrow interval and arrow length sum;
Step 403, parameter value is regulated in input;
Before needs generated animation, the user can import one by interactive interface and regulate parameter value; Can certainly be that one of user preset is regulated parameter value.
Step 404 is obtained the move distance parameter value, and described move distance equals to regulate parameter value and underlying parameter value to be done and get the value that surplus operation obtains;
Step 405, it is the kinematic parameter value with the distance of first arrow that Bezier reference position that preset path forms is set;
When implementing this step, use in this step and get surplus method, can be implemented in the animation effect of a plurality of arrow shuttling movements on the Bezier that preset path forms.When being provided with, can preset the adjusting parameter value, make the distance of terminal vertex of first arrow on the Bezier that the reference position of the Bezier that preset path formed formed with preset path be no more than the length of an arrow.Setting can be so that guarantee the continuity of a plurality of arrows in many arrows animation effect like this.
Step 406 is done interpolation processing to the kinematic parameter value, realizes many arrows path animation.
Can realize many arrows path animation by above-mentioned method embodiment, in order to get more information about the situation of the foregoing description, can be referring to many arrows path display effect figure of the realization of the inventive method shown in Fig. 6; Many arrows path synoptic diagram with the employing the inventive method realization shown in Fig. 7.
Embodiment four
The present invention also provides a kind of device of realizing many arrows path animation, referring to Fig. 5, can comprise:
First acquiring unit 501 is used to obtain the Bezier that preset path forms;
Each embodiment in this instructions all adopts the mode of going forward one by one to describe, and what each embodiment stressed all is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.
More than to a kind of many arrows path animation implementation method provided by the present invention and device, be described in detail, used specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1. a method that realizes many arrows path animation is characterized in that, comprising:
Obtain the Bezier that preset path forms;
Obtain the many arrows on the Bezier that preset path forms;
Interpolation processing is done on arrow summit on the Bezier;
Realize many arrows path animation.
2. method according to claim 1 is characterized in that, the described a plurality of arrows that obtain on the Bezier that preset path forms comprise:
One group of arrow creating is pasted on the Bezier of described preset path formation.
3. method according to claim 1 is characterized in that, the described a plurality of arrows that obtain on the Bezier that preset path forms comprise:
On the Bezier that preset path forms, create start arrow;
On the Bezier that preset path forms, create second arrow, the terminal vertex of described second arrow and the forward end apex of the start arrow preset length of being separated by, promptly arrow is spaced apart preset length;
Set up a plurality of arrows in regular turn on the Bezier that preset path forms, to the last the forward end apex of an arrow is lower than preset length to the distance of curve end.
4. method according to claim 1 is characterized in that, described interpolation processing is done on the arrow summit of dropping on the Bezier, comprising:
Preset the fixed value that is spaced apart between a plurality of arrows of creating;
Reference position to start arrow in a plurality of arrows is done interpolation processing;
Realize many arrows path animation.
5. method according to claim 1 is characterized in that, described interpolation processing is done on the arrow summit of dropping on the Bezier, comprising:
Interpolation processing is done at interval between a plurality of arrows;
Realize many arrows path animation.
6. method according to claim 1 is characterized in that, described interpolation processing is done on the arrow summit of dropping on the Bezier, comprising:
Obtain default arrow interval and arrow length;
Obtain the underlying parameter value, described underlying parameter value equals arrow interval and arrow length sum;
Parameter value is regulated in input;
Obtain the move distance parameter value, described move distance equals to regulate parameter value and underlying parameter value to be done and gets the value that surplus operation obtains;
It is the kinematic parameter value with the distance of first arrow that Bezier reference position that preset path forms is set;
The kinematic parameter value is done interpolation processing, realize many arrows path animation.
7. method according to claim 3 is characterized in that, creates arrow and comprise on the Bezier that preset path forms:
Determine to constitute 8 summits of arrow, i.e. summit 1...8, described summit 1 is the arrow terminal vertex, summit 2 is the arrow forward end apex;
8 summits according to arrow make up 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 integration of described structure is played up, obtain an arrow.
8. method according to claim 7 is characterized in that, the arrow length of described establishment equates that promptly the terminal vertex of each arrow equates to the distance of the forward end apex of this arrow.
9. method according to claim 7 is characterized in that, 8 summits of described definite formation arrow comprise the steps:
On the Bezier that preset path forms, select first group of discrete point;
Preset the coordinate of two initial points, promptly import the coordinate of first coordinate points and second coordinate points, wherein first coordinate points is the point in described first group of discrete point, and first coordinate points is the 1st summit of single arrow;
Determine the 2nd summit of single arrow according to the longitudinal axis value of the transverse axis value on the 1st summit and second coordinate points, described the 2nd summit is the point in first group of discrete point;
Obtain single arrow the 3rd apex coordinate value according to the transverse axis value of the central point A of the 1st summit and the 2nd summit line and the longitudinal axis value of 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;
With the connecting line five equilibrium of the 4th summit isocenter A, obtain single arrow the 5th apex coordinate value;
With the connecting line five equilibrium of the 3rd summit isocenter A, obtain single arrow the 6th apex coordinate value;
Determine the 7th apex coordinate of single arrow according to the longitudinal axis value on the transverse axis value on the 1st summit and the 5th summit;
Determine the 8th apex coordinate of single arrow according to the longitudinal axis value on the transverse axis value on the 1st summit and the 6th summit.
10. a device of realizing many arrows path animation is characterized in that, comprising:
First acquiring unit is used to obtain the Bezier that preset path forms;
Second acquisition unit is used to obtain the many arrows on the Bezier that preset path forms;
Processing unit is used for interpolation processing is done on the arrow summit on the Bezier, realizes many arrows path animation.
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