CN110658908A - Touch virtual painting brush and painting method - Google Patents
Touch virtual painting brush and painting method Download PDFInfo
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- CN110658908A CN110658908A CN201810696557.1A CN201810696557A CN110658908A CN 110658908 A CN110658908 A CN 110658908A CN 201810696557 A CN201810696557 A CN 201810696557A CN 110658908 A CN110658908 A CN 110658908A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/011—Arrangements for interaction with the human body, e.g. for user immersion in virtual reality
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
- G06F3/03545—Pens or stylus
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T19/00—Manipulating 3D models or images for computer graphics
- G06T19/20—Editing of 3D images, e.g. changing shapes or colours, aligning objects or positioning parts
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/01—Indexing scheme relating to G06F3/01
- G06F2203/012—Walk-in-place systems for allowing a user to walk in a virtual environment while constraining him to a given position in the physical environment
Abstract
A virtual touch brush and a drawing method; the tactile virtual brush comprising: a virtual image display unit (100) for displaying a virtual reality scene; a real pen (210) including a key (211) having a magnetic body; the painting brush unit (200) is used for sensing the pressing action force when a user presses a key (211) on the real pen (210) and generating a corresponding stress electric signal, and then changing an induction magnetic field by depending on a current magnetic effect through the stress electric signal so that a magnetic body in the induction magnetic field generates a corresponding pen touch action force on the user; and the control unit (300) is used for displaying the virtual pen corresponding to the real pen (210) and the drawn graph in the virtual reality scene, and correspondingly adjusting the line width of the drawn graph of the virtual pen according to the stress electric signal. The touch virtual painting brush and the painting method are ingenious in design and high in practicability.
Description
Technical Field
The invention relates to the field of virtual reality, in particular to a touch virtual painting brush and a painting method.
Background
Virtual Reality (VR) technology, also called smart environment technology or artificial environment, is a Virtual Reality world in three-dimensional space generated by computer simulation, and provides the user with simulation of sense organs such as vision, hearing, touch and the like, so that the user can observe the objects in the three-dimensional space in time without limitation as if he/she is in his/her own environment. When the user moves, the computer can synchronously perform complex operation, and the accurate 3D world image is returned to generate the presence feeling. In a virtual reality world constructed by VR technology, scenes and characters seen by a user are all virtual; VR technology simply substitutes human awareness into a virtual world.
The traditional drawing method is realized by a tool pen (such as a pen, a writing brush, a pencil and the like) on a medium (such as paper, cloth and the like) in a contact mode; during the drawing process, the pen holder applies a force to the medium through the tool pen, and at the same time, the pen holder feels a corresponding reaction force transmitted back by the tool pen. Excellent painters can perform personalized creation by holding the pen to touch. The traditional VR painting brush usually draws in the air, and does not contact any solid medium during drawing, so that a painter cannot feel the touch of the pen, and the hard pen and the soft pen are difficult to master the strength of light and heavy force and the rhythm of pen transportation in calligraphy and painting.
Disclosure of Invention
The invention provides a touch virtual brush and a drawing method aiming at the technical problems.
The technical scheme provided by the invention is as follows:
the invention provides a virtual brush with a touch sense, which comprises:
the virtual image display unit is used for displaying a virtual reality scene;
a real pen including a magnetic body;
the painting brush unit is used for sensing the pressing action force when a user presses the real pen and generating a corresponding stress electric signal, and then changing an induction magnetic field by depending on a current magnetic effect through the stress electric signal so as to enable a magnetic body in the induction magnetic field to generate a corresponding pen touch action force on the user;
the virtual drawing unit comprises a virtual pen which is displayed in a virtual reality scene and corresponds to a real pen;
and the control unit is respectively in communication connection with the virtual image display unit and the painting brush unit and is used for controlling the virtual image display unit to display the virtual pen and the drawn graph in the virtual reality scene and correspondingly adjusting the line width of the drawn graph of the virtual pen according to the stress electric signal.
In the above-mentioned touch virtual painting brush of the present invention, the virtual painting unit further includes a virtual canvas displayed in a virtual reality scene; the control unit is used for controlling the virtual image display unit to display the virtual canvas in the virtual reality scene; the painting brush unit also comprises a positioning module used for acquiring the posture information and the motion trail information of the real pen;
and the control unit is used for controlling the virtual pen to move according to the posture information and the motion track information, determining a corresponding line width range of a graph drawn on the virtual canvas by the virtual pen according to the relative position of the virtual pen and the virtual canvas, and correspondingly adjusting the line width of the graph drawn by the virtual pen in the corresponding line width range according to the stress electric signal.
In the touch virtual brush pen, the brush pen unit comprises a force sensor for sensing the pressing acting force when a user presses; the force sensor adopts a piezoresistive sensor or a capacitance pressure sensor.
In the touch virtual painting brush, the painting brush unit further comprises an induction module which is used for generating corresponding stress electric signals according to the pressing acting force induced by the force sensor and the moving direction of the virtual brush relative to the virtual painting canvas and changing an induction magnetic field by depending on the current magnetic effect through the stress electric signals;
the induction module comprises two vertical x-direction induction lead groups, y-direction induction lead groups and z-direction induction lead groups, and is used for respectively adjusting stress electric signals flowing through the x-direction induction lead groups, the y-direction induction lead groups and the z-direction induction lead groups so as to respectively adjust the x-direction induction lead groups, the y-direction induction lead groups and the z-direction induction lead groups to generate induction magnetic fields, so that the directions of the magnetic force of a composite magnetic field formed by the induction magnetic fields generated by the x-direction induction lead groups, the y-direction induction lead groups and the z-direction are opposite to the direction of the virtual pen moving relative to the virtual canvas, and the magnitude of the magnetic force of the composite magnetic field to the magnetic body corresponds to the pressing acting force.
In the above-mentioned tactile virtual brush of the present invention, the positioning module may include an acceleration sensor and/or a gyroscope and/or an electronic compass and/or an infrared positioning sensor.
In the above-mentioned virtual painting brush with touch feeling, the virtual painting brush can be a plane, a curved surface, a folded surface, a first composite surface formed by the curved surface and the plane, a second composite surface formed by the curved surface and the folded surface, or a third composite surface formed by the curved surface, the folded surface and the plane.
In the above-mentioned tactile virtual brush pen of the present invention, the virtual drawing unit further includes a virtual pen shape and a virtual palette.
The invention also provides a drawing method, which comprises the following steps:
step S1, sensing the pressing force when the user presses the real pen and generating a corresponding stress electric signal, and changing the induction magnetic field by the stress electric signal and depending on the current magnetic effect so that the magnetic body in the induction magnetic field generates a corresponding pen touch force to the user;
and step S2, displaying the virtual pen corresponding to the real pen and the drawn graph in the virtual reality scene, and correspondingly adjusting the line width of the graph drawn by the virtual pen according to the stress electric signal.
In the above drawing method of the present invention, step S1 further includes: acquiring attitude information and motion trail information of a real pen;
step S2 further includes: displaying a virtual canvas in a virtual reality scene; controlling the movement of the virtual pen according to the attitude information and the movement track information, determining the corresponding line width range of the graph drawn on the virtual canvas by the virtual pen according to the relative position of the virtual pen and the virtual canvas, and correspondingly adjusting the line width of the graph drawn by the virtual pen in the corresponding line width range according to the stress electric signal.
In the above drawing method of the present invention, when the induced magnetic field is changed by using two perpendicular x-direction induced wire sets, y-direction induced wire sets, and z-direction induced wire sets, step S2 further includes:
the force-bearing electric signals flowing through the x-direction induction lead group, the y-direction induction lead group and the z-direction induction lead group are respectively adjusted to respectively adjust the induction magnetic fields generated by the x-direction induction lead group, the y-direction induction lead group and the z-direction induction lead group, so that the direction of the magnetic force of a composite magnetic field formed by the induction magnetic fields generated by the x-direction induction lead group, the y-direction induction lead group and the z-direction to the magnetic body is opposite to the direction of the virtual pen moving relative to the virtual canvas, and the magnitude of the magnetic force of the composite magnetic field to the magnetic body corresponds to the pressing acting force.
The virtual touch brush and the drawing method generate magnetic force through current magnetic effect and simulate the touch feeling by the magnetic force. Meanwhile, the direction of the magnetic force is adjusted by creatively adopting the x-direction induction lead group, the y-direction induction lead group and the z-direction induction lead group which are perpendicular to each other in pairs, so that the simulated pen touch feeling is more real. The touch virtual painting brush and the painting method are ingenious in design and high in practicability.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 illustrates a schematic diagram of a tactile virtual brush according to an embodiment of the present invention;
FIG. 2 illustrates a functional block diagram of the tactile virtual brush of FIG. 1;
fig. 3 is a schematic diagram illustrating a structure of a sensing module of a brush unit of the tactile virtual brush shown in fig. 1;
FIG. 4 shows an enlarged schematic view of the sensing module shown in FIG. 3;
fig. 5 is a schematic diagram illustrating an x-direction sensing wire set, a y-direction sensing wire set, and a z-direction sensing wire set of the sensing module shown in fig. 3.
Detailed Description
The technical problem to be solved by the invention is as follows: the traditional VR painting brush usually draws in the air, and does not contact any solid medium during drawing, so that a painter cannot feel the touch of the pen, and the hard pen and the soft pen are difficult to master the strength of light and heavy force and the rhythm of pen transportation in calligraphy and painting. The technical idea of the invention for solving the technical problem is as follows: a touch virtual painting brush is constructed, magnetic force is generated through current magnetic effect, and the magnetic force is adopted to simulate the touch feeling of the painting brush.
In order to make the technical purpose, technical solutions and technical effects of the present invention more clear and facilitate those skilled in the art to understand and implement the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
Specifically, as shown in fig. 1 and 2, fig. 1 illustrates a schematic diagram of a tactile virtual brush according to an embodiment of the present invention; FIG. 2 illustrates a functional block diagram of the tactile virtual brush of FIG. 1; the invention provides a virtual brush for touch, which comprises:
a virtual image display unit 100 for displaying a virtual reality scene;
a pen 210 including a button 211 having a magnetic body;
the brush unit 200 is configured to sense a pressing force when a user presses a button 211 of the real pen 210 and generate a corresponding force-receiving electrical signal, and change an induced magnetic field by the force-receiving electrical signal through a current magnetic effect, so that a magnetic body in the induced magnetic field generates a corresponding pen touch force on the user;
a virtual drawing unit 400 including a virtual pen displayed in a virtual reality scene and corresponding to the real pen 210;
and the control unit 300 is in communication connection with the virtual image display unit 100 and the brush unit 200, respectively, and is configured to control the virtual image display unit 100 to display a virtual pen and a graph drawn by the virtual pen in a virtual reality scene, and correspondingly adjust a line width of the graph drawn by the virtual pen according to the stress electrical signal.
In this technical solution, the degree of pressing the key 211 is different according to the difference of the pressing force, so as to generate the force-receiving electric signals with different magnitudes. The strength of the induced magnetic field generated by induction is different according to the magnitude of the stressed electric signal. Thus, the magnetic force (which is expressed as attraction or repulsion) applied to the magnetic body in the induced magnetic field is different; the invention simulates the pen touch acting force through the magnetic force.
Further, in the present embodiment, the virtual drawing unit 400 further includes a virtual canvas displayed in the virtual reality scene; the control unit 300 is used to control the virtual image display unit 100 to display a virtual canvas in a virtual reality scene; the virtual canvas can be a plane, a curved surface, a folded surface, a first composite surface formed by the curved surface and the plane, a second composite surface formed by the curved surface and the folded surface, or a third composite surface formed by the curved surface, the folded surface and the plane.
The brush unit 200 further includes a positioning module 240 for acquiring pose information and motion trail information of the real pen 210; the positioning module 240 may include an acceleration sensor and/or a gyroscope and/or an electronic compass and/or an infrared positioning sensor, and the like, and may also be a combination of an angular positioning device such as a gyroscope and a spatial positioning device such as an infrared positioning, and thus may measure six degrees of freedom of the real pen 210.
And the control unit 300 is configured to control the virtual pen to move according to the posture information and the motion trajectory information, determine a corresponding line width range of a graph drawn on the virtual canvas by the virtual pen according to a relative position of the virtual pen and the virtual canvas, and correspondingly adjust the line width of the graph drawn by the virtual pen in the corresponding line width range according to the stress electrical signal.
Further, in the present embodiment, the brush unit 200 includes a force sensor 220 for sensing a pressing force when the user presses the key 211; the force sensor 220 employs a piezoresistive sensor or a capacitive pressure sensor. The force sensor 220 may be a piezoresistive sensor or a capacitive pressure sensor.
Further, the brush unit 200 further includes an induction module 230 for generating a corresponding force-receiving electrical signal according to the pressing force induced by the force sensor 220 and the moving direction of the virtual pen with respect to the virtual canvas, and changing an induction magnetic field by a current magnetic effect through the force-receiving electrical signal; it is understood that the force sensor 220, the sensing module 230 and the angular positioning device in the positioning module 240 are all disposed on the real pen 210.
As shown in fig. 3 to 5, fig. 3 is a schematic diagram illustrating a structure of a sensing module 230 of the brush unit 200 of the tactile virtual brush shown in fig. 1. FIG. 4 illustrates an enlarged schematic view of the sensing module 230 shown in FIG. 3; fig. 5 is a schematic diagram illustrating an x-direction sensing wire group, a y-direction sensing wire group, and a z-direction sensing wire group of the sensing module 230 shown in fig. 3. The sensing module 230 includes two vertical x-direction sensing wire sets, y-direction sensing wire sets and z-direction sensing wire sets, and is configured to adjust the force-bearing electrical signals flowing through the x-direction sensing wire sets, the y-direction sensing wire sets and the z-direction sensing wire sets respectively to adjust the x-direction sensing wire sets, the y-direction sensing wire sets and the z-direction sensing wire sets to generate the sensing magnetic fields, so that the directions of the magnetic forces of the composite magnetic fields formed by the sensing magnetic fields generated by the x-direction sensing wire sets, the y-direction sensing wire sets and the z-direction are opposite to the directions of the virtual pen moving relative to the virtual canvas, and the magnitude of the magnetic forces of the composite magnetic fields on the magnetic bodies corresponds to the pressing force. In this embodiment, the electrical signals flowing through the x-direction sensing wire group, the y-direction sensing wire group, and the z-direction sensing wire group cooperate to form the electrical signals generated by the sensing module 230.
Further, the virtual drawing unit 400 further includes a virtual pen shape, a virtual palette, and the like; wherein, the virtual pen shape can be a hard pen, including but not limited to carbon strips, pencils of different hardness, ball-point pens, mark pens, etc.; the virtual pen shape can also be a soft pen, such as writing brushes of different models and the like. Here, the virtual pen shape has an important influence on the determination of the line width range. For example, the range of line widths is larger when the virtual pen shape is a soft pen than when it is a hard pen.
In the above technical solution, the virtual image display unit 100 generally adopts a VR head display device or an AR head display device.
Further, this embodiment also provides a drawing method based on the virtual brush, which includes the following steps:
step S1, sensing the pressing force when the user presses the key 211 on the real pen 210 and generating a corresponding force-bearing electrical signal, and changing the induced magnetic field by the force-bearing electrical signal and depending on the current magnetic effect, so that the magnetic body on the key 211 in the induced magnetic field generates a corresponding pen touch force on the user;
step S2, displaying the virtual pen corresponding to the real pen 210 and the drawn graph thereof in the virtual reality scene, and correspondingly adjusting the line width of the drawn graph of the virtual pen according to the force-receiving electrical signal.
Further, step S1 further includes: acquiring posture information and motion trail information of the real pen 210;
step S2 further includes: displaying a virtual canvas in a virtual reality scene; controlling the movement of the virtual pen according to the attitude information and the movement track information, determining the corresponding line width range of the graph drawn on the virtual canvas by the virtual pen according to the relative position of the virtual pen and the virtual canvas, and correspondingly adjusting the line width of the graph drawn by the virtual pen in the corresponding line width range according to the stress electric signal.
Further, when the induced magnetic field is changed by using two perpendicular x-direction induced wire sets, y-direction induced wire sets and z-direction induced wire sets, step S2 further includes:
the force-bearing electric signals flowing through the x-direction induction lead group, the y-direction induction lead group and the z-direction induction lead group are respectively adjusted to respectively adjust the induction magnetic fields generated by the x-direction induction lead group, the y-direction induction lead group and the z-direction induction lead group, so that the direction of the magnetic force of a composite magnetic field formed by the induction magnetic fields generated by the x-direction induction lead group, the y-direction induction lead group and the z-direction to the magnetic body is opposite to the direction of the virtual pen moving relative to the virtual canvas, and the magnitude of the magnetic force of the composite magnetic field to the magnetic body corresponds to the pressing acting force.
The virtual touch brush and the drawing method generate magnetic force through current magnetic effect and simulate the touch feeling by the magnetic force. Meanwhile, the direction of the magnetic force is adjusted by creatively adopting the x-direction induction lead group, the y-direction induction lead group and the z-direction induction lead group which are perpendicular to each other in pairs, so that the simulated pen touch feeling is more real. The touch virtual painting brush and the painting method are ingenious in design and high in practicability.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (10)
1. A tactile virtual brush, comprising:
a virtual image display unit (100) for displaying a virtual reality scene;
a real pen (210) including a key (211) having a magnetic body;
the painting brush unit (200) is used for sensing the pressing action force when a user presses a key (211) on the real pen (210) and generating a corresponding stress electric signal, and then changing an induction magnetic field by depending on a current magnetic effect through the stress electric signal so that a magnetic body in the induction magnetic field generates a corresponding pen touch action force on the user;
a virtual drawing unit (400) including a virtual pen displayed in a virtual reality scene and corresponding to the real pen (210);
and the control unit (300) is respectively in communication connection with the virtual image display unit (100) and the painting brush unit (200), and is used for controlling the virtual image display unit (100) to display the virtual pen and the drawn graph in the virtual reality scene and correspondingly adjusting the line width of the drawn graph of the virtual pen according to the stress electric signal.
2. A tactile virtual brush according to claim 1, wherein the virtual drawing unit (400) further comprises a virtual canvas displayed in a virtual reality scene; the control unit (300) is used for controlling the virtual image display unit (100) to display a virtual canvas in a virtual reality scene; the brush unit (200) further comprises a positioning module (240) for acquiring posture information and motion trail information of the real pen (210);
and the control unit (300) is used for controlling the virtual pen to move according to the posture information and the motion trail information, determining the corresponding line width range of the graph drawn on the virtual canvas by the virtual pen according to the relative position of the virtual pen and the virtual canvas, and then correspondingly adjusting the line width of the graph drawn by the virtual pen in the corresponding line width range according to the stress electric signal.
3. A tactile virtual brush according to claim 2, wherein the brush unit (200) comprises a force sensor (220) for sensing a pressing force of a user pressing the button (211); the force sensor (220) is a piezoresistive sensor or a capacitive pressure sensor.
4. A tactile virtual brush according to claim 3, wherein the brush unit (200) further comprises a sensing module (230) for generating a corresponding force electric signal according to the pressing force sensed by the force sensor (220) and the moving direction of the virtual brush relative to the virtual canvas, and changing the induced magnetic field by the force electric signal through the current magnetic effect;
the induction module (230) comprises two vertical x-direction induction lead groups, y-direction induction lead groups and z-direction induction lead groups, and is used for respectively adjusting stress electric signals flowing through the x-direction induction lead groups, the y-direction induction lead groups and the z-direction induction lead groups so as to respectively adjust the x-direction induction lead groups, the y-direction induction lead groups and the z-direction induction lead groups to generate induction magnetic fields, so that the directions of the magnetic force of a composite magnetic field formed by the induction magnetic fields generated by the x-direction induction lead groups, the y-direction induction lead groups and the z-direction are opposite to the directions of the virtual pen moving relative to the virtual canvas, and the magnitude of the magnetic force of the composite magnetic field on the magnetic body corresponds to the pressing acting force.
5. A tactile virtual brush according to claim 2, characterized in that the positioning module (240) may comprise an acceleration sensor and/or a gyroscope and/or an electronic compass and/or an infrared positioning sensor.
6. A tactile virtual brush according to claim 2, wherein the virtual canvas is a flat surface, a curved surface, a folded surface, a first composite surface consisting of a curved surface and a flat surface, a second composite surface consisting of a curved surface and a folded surface, or a third composite surface consisting of a curved surface, a folded surface and a flat surface.
7. The virtual brush as claimed in claim 1, wherein the virtual drawing unit (400) further comprises a virtual pen shape, a virtual palette.
8. A method of drawing, comprising the steps of:
step S1, sensing the pressing force of the user when pressing the key (211) on the real pen (210) and generating a corresponding stress electric signal, and changing the induction magnetic field by the stress electric signal and depending on the current magnetic effect so that the magnetic body on the key (211) in the induction magnetic field generates a corresponding pen touch force on the user;
and step S2, displaying the virtual pen corresponding to the real pen (210) and the drawn graph in the virtual reality scene, and correspondingly adjusting the line width of the drawn graph of the virtual pen according to the stress electric signal.
9. The drawing method according to claim 8, wherein the step S1 further comprises: acquiring posture information and motion trail information of a real pen (210);
step S2 further includes: displaying a virtual canvas in a virtual reality scene; controlling the movement of the virtual pen according to the attitude information and the movement track information, determining the corresponding line width range of the graph drawn on the virtual canvas by the virtual pen according to the relative position of the virtual pen and the virtual canvas, and correspondingly adjusting the line width of the graph drawn by the virtual pen in the corresponding line width range according to the stress electric signal.
10. The drawing method according to claim 9, wherein when the induced magnetic field is changed by using two perpendicular x-direction, y-direction and z-direction induction lead sets, the step S2 further comprises:
the force-bearing electric signals flowing through the x-direction induction lead group, the y-direction induction lead group and the z-direction induction lead group are respectively adjusted to respectively adjust the induction magnetic fields generated by the x-direction induction lead group, the y-direction induction lead group and the z-direction induction lead group, so that the direction of the magnetic force of a composite magnetic field formed by the induction magnetic fields generated by the x-direction induction lead group, the y-direction induction lead group and the z-direction to the magnetic body is opposite to the direction of the virtual pen moving relative to the virtual canvas, and the magnitude of the magnetic force of the composite magnetic field to the magnetic body corresponds to the pressing acting force.
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| CN113703575A (en) * | 2021-08-26 | 2021-11-26 | 歌尔光学科技有限公司 | VR handle and VR equipment |
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| CN110658908B (en) | 2023-04-18 |
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