CN112116678B - Irregular virtual pointer display method of liquid crystal instrument and liquid crystal instrument - Google Patents
Irregular virtual pointer display method of liquid crystal instrument and liquid crystal instrument Download PDFInfo
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- CN112116678B CN112116678B CN202010792574.2A CN202010792574A CN112116678B CN 112116678 B CN112116678 B CN 112116678B CN 202010792574 A CN202010792574 A CN 202010792574A CN 112116678 B CN112116678 B CN 112116678B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T13/00—Animation
- G06T13/80—2D [Two Dimensional] animation, e.g. using sprites
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K35/00—Arrangement of adaptations of instruments
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/451—Execution arrangements for user interfaces
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T11/00—2D [Two Dimensional] image generation
- G06T11/20—Drawing from basic elements, e.g. lines or circles
- G06T11/206—Drawing of charts or graphs
Abstract
The invention provides a liquid crystal instrument irregular virtual pointer display method and a liquid crystal instrument, wherein the method comprises the following steps: acquiring a pre-display range of instrument data, and determining a rotation angle corresponding to an instrument pointer according to an instrument interface UI design effect; establishing a first table based on the corresponding relation between the pre-display numerical value and the pointer angle of the instrument in the pre-display range of the instrument data; establishing a second table based on the corresponding relation between the pointer angle of the instrument and the pointer picture; and calculating the number of animation drawing times between the pre-display numerical value and the current value, starting animation drawing, and sequentially displaying pointer pictures in the number of animation drawing times according to the corresponding relation among the pre-display numerical value, the instrument pointer angle and the pointer pictures in the first table and the second table. Based on the scheme, the instrument pointer on the instrument panel with different shapes can be accurately displayed, the dynamic display effect of the liquid crystal instrument pointer is improved, and the user experience is improved.
Description
Technical Field
The invention relates to the field of automobile instruments, in particular to a liquid crystal instrument irregular virtual pointer display method and a liquid crystal instrument.
Background
Compared with the traditional meter, the liquid crystal meter has a pure physical structure, various display styles, easy change of display data and wide application in automobile meters. Along with the development of the liquid crystal instrument technology, higher requirements are put forward on display contents and display effects, and the display effects of the traditional mechanical pointer rotating around the circle center are difficult to meet consumer demands.
The current liquid crystal instrument display adopts fixed picture rotation to refresh to realize pointer rotation, for various shapes dial plates such as non-circular dial plate, because the rotation angle of scale and pointer on the dial plate is nonlinear, and pointer length needs to change, if adopting conventional display method, instrument display precision is lower, and the picture display effect is relatively poor.
Disclosure of Invention
In view of the above, the embodiment of the invention provides a method for displaying an irregular virtual pointer of a liquid crystal instrument and the liquid crystal instrument, so as to solve the problems of low instrument display precision and poor display effect.
In a first aspect of the embodiment of the present invention, there is provided a method for displaying an irregular virtual pointer of a liquid crystal meter, including:
acquiring a pre-display range of instrument data, and determining a rotation angle corresponding to an instrument pointer according to an instrument interface UI design effect;
establishing a first table based on the corresponding relation between the pre-display numerical value and the pointer angle of the instrument in the pre-display range of the instrument data;
establishing a second table based on the corresponding relation between the pointer angle of the instrument and the pointer picture;
and calculating the number of animation drawing times between the pre-display numerical value and the current value, starting animation drawing, and sequentially displaying pointer pictures in the number of animation drawing times according to the corresponding relation among the pre-display numerical value, the instrument pointer angle and the pointer pictures in the first table and the second table.
In a second aspect of the embodiment of the present invention, there is provided a liquid crystal meter, including:
the acquisition module is used for acquiring the pre-display range of the instrument data and determining the corresponding rotation angle of the instrument pointer according to the UI design effect of the instrument interface;
the first table generation module is used for establishing a first table based on the corresponding relation between the pre-display numerical value and the pointer angle of the instrument in the pre-display range of the instrument data;
the second table generation module is used for establishing a second table based on the corresponding relation between the pointer angle of the instrument and the pointer picture;
and the display module is used for calculating the animation drawing times between the pre-display numerical value and the current value, and after the animation drawing is started, sequentially displaying the pointer pictures in the animation drawing times according to the corresponding relation among the pre-display numerical value, the instrument pointer angle and the pointer pictures in the first table and the second table.
In the embodiment of the invention, after the pre-display range of the instrument data and the corresponding rotation angle of the instrument pointer are determined, a table is established, the corresponding relation among the pre-display numerical value, the instrument pointer angle and the pointer picture is determined, and the corresponding pointer picture is acquired for display when animation drawing is carried out, so that the problems of low instrument display precision and poor display effect are solved, the accurate display of the instrument pointer on instrument panels with different shapes can be ensured, meanwhile, the pointer size can be adaptively changed, the rotation animation effect is realized, the display effect of the liquid crystal instrument can be effectively improved, and the user experience is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings described below are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a method for displaying irregular virtual pointers of a liquid crystal meter according to an embodiment of the present invention;
FIG. 2 is a schematic diagram showing the effect of displaying irregular virtual pointers of a liquid crystal meter according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a liquid crystal meter according to an embodiment of the present invention.
Detailed Description
In order to make the objects, features and advantages of the present invention more comprehensible, the technical solutions in the embodiments of the present invention are described in detail below with reference to the accompanying drawings, and it is apparent that the embodiments described below are only some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art without making any inventive effort, based on the embodiments of the present invention will be made in the light of the following description of the principles and features of the present invention with reference to the accompanying drawings, the examples being given for the purpose of illustrating the invention only and not for the purpose of limiting the scope of the invention.
The term "comprising" in the description of the invention or in the claims and in the above-mentioned figures and other similar meaning expressions is meant to cover a non-exclusive inclusion, such as a process, method or system, apparatus comprising a series of steps or elements, without limitation to the steps or elements listed.
Referring to fig. 1, fig. 1 is a flow chart of a method for displaying an irregular virtual pointer of a liquid crystal instrument according to an embodiment of the invention, including:
for a non-circular instrument panel, as shown in fig. 2, when the instrument panel is elliptical, when the values displayed by the instrument are 0, 45 and 90 respectively, the same values are added, but the lengths of the pointers a, b and c are different, and the angle 1 is not equal to the angle 2, because the scale on the instrument panel and the rotation angle of the pointer are nonlinear and can not be calculated, the length of the pointer can be changed, and the correspondence between the rotation of the pointer and the scale of the instrument panel needs to be determined in order to accurately point to the scale.
S101, acquiring a pre-display range of instrument data, and determining a rotation angle corresponding to an instrument pointer according to an instrument interface UI design effect;
and determining a pre-display range of the instrument data, wherein the display range of the data is [ n, m ], n is a minimum value, m is a maximum value, Δt is a minimum refreshing or drawing time interval of animation, and Δv is minimum display precision of the instrument numerical value.
And determining the actual rotation angle of the pointer according to the UI design effect, setting the initial angle of the pointer as arcS and the end angle of the pointer as arcE.
S102, establishing a first table based on the corresponding relation between the pre-display numerical value and the pointer angle of the instrument in the pre-display range of the instrument data;
because the pointer rotation angle cannot be obtained through calculation, the pointer angle corresponding to each display value can be obtained through searching data.
Illustratively, the pointer angle for each desired displayed value between m and n is determined to form a table Arc [ num ], such as: arc [ n ] =arcs, arc [ n+Δv ] =arcs+0.5, arc [ n+2×Δv ] =arcs+0.7, …, arc [ m ] =arce.
Wherein, by Arc [ num ] representing the first table, arc [ num ] can be represented as Arc [ n+i×Δv ] =arcs+a, n represents the minimum value in the data display range, i represents the number of frames, Δv represents the minimum display accuracy of the instrument value, arcS is the pointer start angle, a is the angle increment, n+i×Δv is equal to or less than m, arcs+a is equal to or less than arcE.
S103, establishing a second table based on the corresponding relation between the pointer angle of the instrument and the pointer picture;
in actual display, the picture displayed by the pointer is related to the pointing angle of the pointer, and a table IMG [ arc ] is formed according to different pointer pictures corresponding to each pointer angle, for example: IMG [ arcS ] =image 1, IMG [ arcs+0.5] =image 2, …, IMG [ arcE ] =image.
Wherein, the second table is denoted by IMG [ arc ], which may be denoted as IMG [ arc+a ] =imagei, arc is the pointer start angle, a is the angle increment, i denotes the metering parameter, i=1, 2,3 …, N.
S104, calculating the number of animation drawing times between the pre-display numerical value and the current value, starting the animation drawing, and sequentially displaying pointer pictures in the number of animation drawing times according to the corresponding relation among the pre-display numerical value, the instrument pointer angle and the pointer pictures in the first table and the second table.
Specifically, the number of animation drawings between the pre-display numerical value and the current value is calculated according to the following formula: count= (nextV-currentV)/Δv;
wherein Count represents the number of animation drawings, currentV represents the current value, nextV represents the pre-display value, and Deltav represents the minimum display precision of the instrument value.
Specifically, starting animation drawing, setting a frame cnt as a current frame number, and driving an animation process by continuously increasing the frame cnt, wherein the frame cnt is as follows: initial value: end value 0: count.
Setting a liquid crystal instrument to draw an instrument pointer at each delta t time interval;
calculating the instrument value to be displayed in the pre-display frame: vtmp = currentV + frameCnt Δv;
according to the instrument pointer angle corresponding to the instrument value to be displayed in the first table, determining the pointer angle to be displayed: aimArc = Arc [ vtmp ];
according to pointer pictures corresponding to the instrument pointer angles to be displayed in the second table, determining the pointer pictures to be displayed: aimlmg = IMG [ aimArc ];
based on the display of the current pointer picture and the pointer picture aimImg to be displayed, displaying the effect of the pointer after rotating the angle aimArc;
wherein vtmp represents the instrument value to be displayed, aimArc represents the pointer angle to be displayed, aimImg represents the pointer picture to be displayed, currentV represents the current value, framecnt represents the current frame number, Δv represents the minimum display precision of the instrument value, arc [ vtmp ] represents the pointer angle corresponding to vtmp in the first table, and IMG [ aimArc ] represents the pointer angle corresponding to aimArc in the second table.
Based on the method provided by the embodiment of the invention, the instrument display precision can be improved, the dynamic animation display effect is realized, and the use experience of a user is ensured.
It should be understood that the sequence number of each step in the above embodiment does not mean the sequence of execution, and the execution sequence of each process should be determined by its function and internal logic, and should not be construed as limiting the implementation process of the embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a liquid crystal meter according to an embodiment of the present invention, where the meter includes:
the obtaining module 310 is configured to obtain a pre-display range of meter data, and determine a rotation angle corresponding to a meter pointer according to a design effect of a meter interface UI;
a first table generating module 320, configured to establish a first table based on a correspondence between a pre-display value and an instrument pointer angle in a pre-display range of instrument data;
a second table generating module 330, configured to establish a second table based on a correspondence between the pointer angle of the meter and the pointer picture;
the display module 340 is configured to calculate the number of animation drawing between the pre-display value and the current value, and after the animation drawing is started, sequentially display pointer pictures in the number of animation drawing according to the corresponding relationship among the pre-display value, the meter pointer angle and the pointer pictures in the first table and the second table.
Specifically, the number of animation drawings between the pre-display numerical value and the current value is calculated according to the following formula: count= (nextV-currentV)/Δv;
wherein Count represents the number of animation drawings, currentV represents the current value, nextV represents the pre-display value, and Deltav represents the minimum display precision of the instrument value.
Optionally, the display module 340 includes:
the setting unit is used for setting the liquid crystal instrument to draw an instrument pointer at intervals delta t;
the calculating unit calculates the instrument value to be displayed in the pre-display frame: vtmp = currentV + frameCnt Δv;
the first determining unit determines the pointer angle to be displayed according to the pointer angle of the instrument corresponding to the instrument value to be displayed in the first table: aimArc = Arc [ vtmp ];
the second determining unit determines the pointer picture to be displayed according to the pointer picture corresponding to the pointer angle of the instrument to be displayed in the second table: aimlmg = IMG [ aimArc ];
the display unit displays the effect of the pointer after rotating the angle aimArc based on the display of the current pointer picture and the pointer picture aimImg to be displayed;
wherein vtmp represents the instrument value to be displayed, aimArc represents the pointer angle to be displayed, aimImg represents the pointer picture to be displayed, currentV represents the current value, framecnt represents the current frame number, Δv represents the minimum display precision of the instrument value, arc [ vtmp ] represents the pointer angle corresponding to vtmp in the first table, and IMG [ aimArc ] represents the pointer angle corresponding to aimArc in the second table.
It will be appreciated by those of ordinary skill in the art that in one embodiment, the liquid crystal meter includes a memory, a processor, and a computer program stored in the memory and executable on the processor, which when executed implements steps S101 to S104 to implement the display of irregular virtual pointers on the meter. In another embodiment, the computer program may also be stored in a computer readable storage medium, including, for example, a flash memory.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (4)
1. A display method of an irregular virtual pointer of a liquid crystal instrument comprises the following steps:
acquiring a pre-display range of instrument data, and determining a rotation angle corresponding to an instrument pointer according to an instrument interface UI design effect;
establishing a first table based on the corresponding relation between the pre-display numerical value and the pointer angle of the instrument in the pre-display range of the instrument data;
establishing a second table based on the corresponding relation between the pointer angle of the instrument and the pointer picture;
calculating the number of animation drawing times between the pre-display numerical value and the current value, starting animation drawing, and sequentially displaying pointer pictures in the number of animation drawing times according to the corresponding relation among the pre-display numerical value, the instrument pointer angle and the pointer pictures in the first table and the second table;
the number of times of animation drawing between the pre-display numerical value and the current value is calculated specifically as follows:
calculating the number of animation drawing times between the pre-display numerical value and the current value according to the following formula:
Count＝(nextV-currentV)/Δv；
wherein Count represents the number of animation drawings, currentV represents the current value, nextV represents the pre-display value, and Deltav represents the minimum display precision of the instrument value.
2. The method according to claim 1, wherein sequentially displaying the pointer pictures within the number of animated drawings according to the corresponding relationship among the pre-display values, the meter pointer angles, and the pointer pictures in the first table and the second table comprises:
setting a liquid crystal instrument to draw an instrument pointer at each delta t time interval;
calculating the instrument value to be displayed in the pre-display frame: vtmp = currentV + frameCnt Δv;
according to the instrument pointer angle corresponding to the instrument value to be displayed in the first table, determining the pointer angle to be displayed: aimArc = Arc [ vtmp ];
according to pointer pictures corresponding to the instrument pointer angles to be displayed in the second table, determining the pointer pictures to be displayed: aimlmg = IMG [ aimArc ];
based on the display of the current pointer picture and the pointer picture aimImg to be displayed, displaying the effect of the pointer after rotating the angle aimArc;
wherein vtmp represents the instrument value to be displayed, aimArc represents the pointer angle to be displayed, aimImg represents the pointer picture to be displayed, currentV represents the current value, framecnt represents the current frame number, Δv represents the minimum display precision of the instrument value, arc [ vtmp ] represents the pointer angle corresponding to vtmp in the first table, and IMG [ aimArc ] represents the pointer picture corresponding to aimArc in the second table.
3. A liquid crystal meter, comprising:
the acquisition module is used for acquiring the pre-display range of the instrument data and determining the corresponding rotation angle of the instrument pointer according to the UI design effect of the instrument interface;
the first table generation module is used for establishing a first table based on the corresponding relation between the pre-display numerical value and the pointer angle of the instrument in the pre-display range of the instrument data;
the second table generation module is used for establishing a second table based on the corresponding relation between the pointer angle of the instrument and the pointer picture;
the display module is used for calculating the animation drawing times between the pre-display numerical value and the current value, and after the animation drawing is started, the pointer pictures are sequentially displayed in the animation drawing times according to the corresponding relation among the pre-display numerical value, the instrument pointer angle and the pointer pictures in the first table and the second table;
the number of times of animation drawing between the pre-display numerical value and the current value is calculated specifically as follows:
calculating the number of animation drawing times between the pre-display numerical value and the current value according to the following formula:
Count＝(nextV-currentV)/Δv；
wherein Count represents the number of animation drawings, currentV represents the current value, nextV represents the pre-display value, and Deltav represents the minimum display precision of the instrument value.
4. A liquid crystal meter according to claim 3, wherein the display module comprises:
the setting unit is used for setting the liquid crystal instrument to draw an instrument pointer at intervals delta t;
the calculating unit calculates the instrument value to be displayed in the pre-display frame: vtmp = currentV + frameCnt Δv;
the first determining unit determines the pointer angle to be displayed according to the pointer angle of the instrument corresponding to the instrument value to be displayed in the first table: aimArc = Arc [ vtmp ];
the second determining unit determines the pointer picture to be displayed according to the pointer picture corresponding to the pointer angle of the instrument to be displayed in the second table: aimlmg = IMG [ aimArc ];
the display unit displays the effect of the pointer after rotating the angle aimArc based on the display of the current pointer picture and the pointer picture aimImg to be displayed;
wherein vtmp represents the instrument value to be displayed, aimArc represents the pointer angle to be displayed, aimImg represents the pointer picture to be displayed, currentV represents the current value, framecnt represents the current frame number, Δv represents the minimum display precision of the instrument value, arc [ vtmp ] represents the pointer angle corresponding to vtmp in the first table, and IMG [ aimArc ] represents the pointer picture corresponding to aimArc in the second table.
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