U.S. patent application number 16/729459 was filed with the patent office on 2021-06-10 for virtual reality system.
The applicant listed for this patent is Lesoft Technology (Beijing) Co., LTD.. Invention is credited to WEI ZHENG.
Application Number | 20210174588 16/729459 |
Document ID | / |
Family ID | 1000004593638 |
Filed Date | 2021-06-10 |
United States Patent
Application |
20210174588 |
Kind Code |
A1 |
ZHENG; WEI |
June 10, 2021 |
VIRTUAL REALITY SYSTEM
Abstract
A system of virtual reality includes a roaming path control
unit, where the roaming path control unit includes a decomposing
processing module, a tagging processing module, a setting
processing module, a control processing module and a roaming path
generating module, where the control processing module is
configured to, detect a tag of a passing grid cell from a start
point of the roaming path when a roamer roams in the virtual
passage, if the passing grid cell is tagged as an impassable cell,
then select another grid cell for re-detection; if the passing grid
cell is tagged as a passable cell, then further detect whether the
roamer is the preset roaming object, according to the roaming
control label for the passable cell, if not, then select another
grid cell for re-detection, if yes, then determine to be passable
and continue to select the next passing grid cell for
detection.
Inventors: |
ZHENG; WEI; (Beijing City,
CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Lesoft Technology (Beijing) Co., LTD. |
Beijing City |
|
CN |
|
|
Family ID: |
1000004593638 |
Appl. No.: |
16/729459 |
Filed: |
December 29, 2019 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
G08G 9/02 20130101; G06T
19/003 20130101 |
International
Class: |
G06T 19/00 20060101
G06T019/00 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 9, 2019 |
CN |
201911247722.6 |
Claims
1. A virtual reality system comprising a roaming path control unit,
wherein, the roaming path control unit comprises: a decomposing
processing module, configured to decompose a virtual passage into
various grid cells; a tagging processing module, configured to tag
the grid cells as passable cells and impassable cells; a setting
processing module, configured to set a roaming control label for
each of the passable cells, wherein the roaming control label
indicates a preset roaming object is passable; a control processing
module, configured to detect a tag of a passing grid cell from a
start point of the roaming path when a roamer roams in the virtual
passage, wherein, if the passing grid cell is tagged as an
impassable cell, then determine to be impassable and select another
grid cell for re-detection; if the passing grid cell is tagged as a
passable cell, then further detect whether the roamer is the preset
roaming object, according to the roaming control label for the
passable cell, if not, then determine to be impassable and select
another grid cell for re-detection, if yes, then determine to be
passable and continue to select the next passing grid cell for
detection; and a roaming path generating module, configured to
generate a passable roaming path according to a detection result;
wherein the roaming path control unit further comprises: a path
section dividing processing module, configured to divide the
generated roaming path into a plurality of roaming path sections
according to the width of the passage; and set different
resolutions for each roaming path section, and reconstruct a
roaming path section according to the resolution of the roaming
path section.
2. (canceled)
3. The system according to claim 1, wherein, the setting processing
module is further configured to: set an attribute value of the
roaming control label, wherein the attribute value of 0 indicates
to be impassable, the attribute value of 1 indicates to be
passable; when it is detected by the control processing module that
the roamer is a preset roaming object, further detect the attribute
value of the roaming control label, if it is detected that the
attribute value of the roaming control label is 1, then determine
to be passable and continue to select the next passing grid cell
for detection, if it is detected that the attribute value of the
roaming control label is 0, then determine to be impassable and
select another grid cell for re-detection.
4. (canceled)
5. The system according to claim 1, wherein, the virtual passage
comprises virtual highway, virtual waterway and virtual pedestrian
passageway.
Description
CROSS REFERENCE TO RELATED APPLICATION
[0001] This application claims priority to Chinese Patent
Application No. 201911247722.6, filed on Dec. 9, 2019, the entire
content of which is incorporated herein by reference for all
purposes.
TECHNICAL FIELD
[0002] The present disclosure relates to the field of virtual
reality technology, and more particularly, to a virtual reality
system.
BACKGROUND
[0003] Virtual Reality (VR) technology, also known as Spirit Realm
technology, incorporates computer, electronic information and
simulation technologies, and the basic way of implementing VR is to
simulate virtual environment with a computer to give people a sense
of environmental immersion. In a virtual reality system, a virtual
character roams in a virtual passage, but not all the virtual
passage roamers in the VR system can roam, that is, the roaming
path of the roamer needs to be controlled. In the prior art,
roaming path control in a virtual reality system is implemented in
a modeling manner, that is, when a model layer is constructed, a
new layer is created, a passable area is arranged in the new layer,
and roaming is controlled according to the passable area of the new
layer. However, the modeling manner adopted by such a technology is
complex and has higher requirements for computer hardware.
SUMMARY
[0004] The technical problem to be solved in various embodiments of
the present disclosure is to provide a virtual reality system for
implementing roaming path control, which has lower requirements for
computer hardware and relatively simple roaming path control
manner.
[0005] To solve the above technical problem, the technical
solutions according to various embodiments of the present
disclosure are as follows:
[0006] Provided is a virtual reality system including a roaming
path control unit, where the roaming path control unit
includes:
[0007] a decomposing processing module, configured to decompose a
virtual passage into various grid cells;
[0008] a tagging processing module, configured to tag the grid
cells as passable cells and impassable cells;
[0009] a setting processing module, configured to set a roaming
control label for each of the passable cells, wherein the roaming
control label indicates a preset roaming object is passable;
[0010] a control processing module, configured to detect a tag of a
passing grid cell from a start point of the roaming path when a
roamer roams in the virtual passage, if the passing grid cell is
tagged as an impassable cell, then determine to be impassable and
select another grid cell for re-detection; if the passing grid cell
is tagged as a passable cell, then further detect whether the
roamer is the preset roaming object, according to the roaming
control label for the passable cell, if not, then determine to be
impassable and select another grid cell for re-detection, if yes,
then determine to be passable and continue to select the next
passing grid cell for detection;
[0011] a roaming path generating module, configured to generate a
passable roaming path according to a detection result.
[0012] Additionally, the roaming path control unit further
includes:
[0013] a roaming speed control processing module, configured to
detect pixel coordinates of a current grid cell and a previous grid
cell which are passable;
[0014] determine a roaming speed according to the detected pixel
coordinates;
[0015] determine whether the roaming speed exceeds a preset speed,
and control to reduce the roaming speed after the preset speed is
determined to be exceeded.
[0016] Additionally, the setting processing module is further
configured to:
[0017] set an attribute value of the roaming control label, wherein
the attribute value of 0 indicates to be impassable, the attribute
value of 1 indicates to be passable; when it is detected by the
control processing module that the roamer is a preset roaming
object, further detect the attribute value of the roaming control
label, if it is detected that the attribute value of the roaming
control label is 1, then determine to be passable and continue to
select the next passing grid cell for detection, if it is detected
that the attribute value of the roaming control label is 0, then
determine to be impassable and select another grid cell for
re-detection.
[0018] Additionally, the roaming path control unit further
includes:
[0019] a path section dividing processing module, configured to
divide the generated roaming path into a plurality of roaming path
sections according to the width of the passage;
[0020] setting different resolutions for each roaming path section,
and reconstructing a roaming path section according to the
resolution of the roaming path section.
[0021] Particularly, the virtual passage includes virtual highway,
virtual waterway and virtual pedestrian passageway.
[0022] As compared with prior art, various embodiments of the
present disclosure have the following advantages:
[0023] In the virtual reality system according to various
embodiments of the present disclosure, a virtual passage is
decomposed by a decomposing processing module into various grid
cells; the grid cells are tagged by a tagging processing module as
passable cells and impassable cells; a roaming control label is set
by a setting processing module for each of the passable cells,
wherein the roaming control label indicates a preset roaming object
is passable;
[0024] a tag of a passing grid cell is detected by a control
processing module from a start point of the roaming path when a
roamer roams in the virtual passage, if the passing grid cell is
tagged as an impassable cell, then it is determined to be
impassable and another grid cell is selected for re-detection; if
the passing grid cell is tagged as a passable cell, then whether
the roamer is the preset roaming object is further detected,
according to the roaming control label for the passable cell, if
not, then it is determined to be impassable and another grid cell
is selected for re-detection, if yes, then it is determined to be
passable and continued to select the next passing grid cell for
detection; and a passable roaming path is generated by a roaming
path generating module according to a detection result. Therefore,
the implementation of the roaming path control by the virtual
reality system according to various embodiments of the present
disclosure is simple, there is no need to construct complex
three-dimensional models, and the requirements for computer
hardware are relatively low.
BRIEF DESCRIPTION OF THE DRAWINGS
[0025] FIG. 1 is a block diagram of a virtual reality system
according to a first embodiment of the present disclosure;
[0026] FIG. 2 is a schematic diagram of setting grid cells in a
virtual reality system according to an embodiment of the present
disclosure;
[0027] FIG. 3 is a schematic diagram of a roaming path in a virtual
reality system according to an embodiment of the present
disclosure;
[0028] FIG. 4 is a block diagram of a virtual reality system
according to a second embodiment of the present disclosure;
[0029] FIG. 5 is a schematic diagram of setting attributes of
roaming control labels in a virtual reality system according to an
embodiment of the present disclosure; and
[0030] FIG. 6 is a block diagram of a virtual reality system
according to a third embodiment of the present disclosure.
DETAILED DESCRIPTION
[0031] Refer to FIG. 1, which is a block diagram of a virtual
reality system according to an embodiment of the present
disclosure, and the virtual reality system in various embodiments
of the present disclosure includes a roaming path control unit 1,
and further includes other units in practical implementation, which
will not be described in detail herein. What's important, the
roaming path control unit 1 according to the present disclosure
includes a decomposing processing module 11, a tagging processing
module 12, a setting processing module 13, a control processing
module 14 and a roaming path generating module 15,
particularly,
[0032] the decomposing processing module 11 according to various
embodiments of the present disclosure, is configured to decompose a
virtual passage into various grid cells, in practical
implementation, the virtual passage in various embodiments of the
present disclosure can include virtual highway, virtual waterway,
virtual pedestrian passageway and the like according to different
roamers or roaming scenarios, the virtual passage also can be other
passages according to actual circumstances, and the present
disclosure is not limited to a specific type of the passage.
Additionally, there are many algorithms about roaming path
planning, the roaming path planning for a point object is typically
based on cell decomposition, and the cell can be a grid cell, a
convex polygonal cell or a hierarchical decomposition cell, the
virtual passage is decomposed into various grid cells in various
embodiments of the present disclosure. For example, as a preferred
embodiment and referring to FIG. 2, the grid cell is a grid cell
with a side length of L. It should be noted that only regular cubes
are schematically shown in FIG. 2 to illustrate the decomposition
of virtual passage into grid cells, but the virtual passage in
specific implementation is not a regular spatial structure.
However, by setting L smaller, the virtual passages can be
approximately decomposed into a grid cell structure, which will not
be described in detail here;
[0033] the tagging processing module 12 according to various
embodiments of the present disclosure, is configured to tag the
grid cells as passable cells and impassable cells, the grid cells
in various embodiments of the present disclosure are classified
into passages and barriers, namely, passable cells and impassable
cells, where, the passable cells are grid cells which are passable
when roaming and impassable cells are grid cells which are
impassable when roaming, and other passable cells need to be
bypassed to get to the destination, which will not be described in
detail here;
[0034] the setting processing module 13 according to various
embodiments of the present disclosure, is configured to set a
roaming control label for each of the passable cells, where the
roaming control label indicates a preset roaming object is
passable, the roamer in various embodiments of the present
disclosure can be different objects, such as human beings, animals,
vehicles, ships and the like, different roamers have different
roaming passages, for example, a vehicle only can pass on a highway
and cannot pass on a pedestrian passageway, and a ship can only
pass on a waterway. Therefore, in various embodiments of the
present disclosure, the virtual passage is further configured with
a roaming control label, for allowing a preset roaming object to
pass, for example, the highway is allowable for human beings,
animals and vehicles, but the waterway is only allowable for ships.
The preset roamers allowable to pass the specific virtual passage
can be adjusted according to actual circumstances, which is not
limited herein;
[0035] the control processing module 14 according to various
embodiments of the present disclosure, is configured to detect a
tag of a passing grid cell from a start point of the roaming path
when a roamer roams in the virtual passage, if the passing grid
cell is tagged as an impassable cell, then determine to be
impassable and another grid cell is selected for re-detection; if
the passing grid cell is tagged as a passable cell, then it is
further detected whether the roamer is the preset roaming object,
according to the roaming control label for the passable cell, if
not, then determine to be impassable and another grid cell is
selected for re-detection, if yes, then determine to be passable
and the next passing grid cell is continued to select for
detection;
[0036] the roaming path generating module 15 according to various
embodiments of the present disclosure, is configured to generate a
passable roaming path according to a detection result, in various
embodiments of the present disclosure, only passable grid cell
according to the detection result can be taken as the roaming path
to pass, and the other impassable grid cell according to the
detection result is forbidden to pass.
[0037] It should be noted that, the roaming path algorithm in the
above embodiment can adopt an iterative deepening search algorithm
(IDA, Iterative deepening A*) to find a path from start to goal by
taking a straight-line distance between a current position and a
target as a heuristic function, for example, refer to FIG. 3, a
path from A to B is selected, for the selected path, and a tag of a
passing grid cell and the roaming control label are detected, and
the next grid cell is selected to pass, and the final roaming path
is obtained by continuous iterative deepening search, which will
not be described in detail here.
[0038] Additionally, in a virtual reality system, when roaming is
performed following a virtual map, a roaming scenario may skip to a
scenario not conforming to the real one, which reduces the user's
sense of immersion. In order to solve the skipping phenomenon of
roaming scenarios, various embodiments of the present disclosure
adopt the following manners: on the one hand, the scale in the
virtual reality system is adjusted, so that the actual longitude
and latitude coordinates in the real scenario are changed into
coordinates of the pixel points in the corresponding virtual map,
after doing this, the scenario in the virtual reality system
conforms to the proportion of the real scenario; on the other hand,
the roaming speed is controlled in various embodiments of the
present disclosure, a preset roaming speed is set, refer to FIG. 4,
the roaming path control unit 1 further includes a roaming speed
control processing module 16, configured to detect pixel
coordinates of a current grid cell and a previous grid cell which
are passable; determine the roaming speed according to the detected
pixel coordinates; determine whether the roaming speed exceeds a
preset speed, and control to reduce the roaming speed after the
preset speed is determined to be exceeded, so that the change in
roaming scenario can be controlled within a certain range, and the
probability of skipping roaming scenarios can be reduced.
[0039] Additionally, in actual scenarios, whether the roaming path
is passable is dynamic, that is, passable roaming path may vary
with the change of conditions. In order to implement dynamic
roaming path control, a setting processing module 13 is further
configured to set an attribute value of the roaming control label
in various embodiments of the present disclosure, where, the
attribute value of 0 indicates to be impassable, the attribute
value of 1 indicates to be passable; when it is detected by a
control processing module 14 that the roamer is a preset roaming
object, the attribute value of the roaming control label is further
detected, if it is detected that the attribute value of the roaming
control label is 1, then it is determined to be passable and
continued to select the next passing grid cell is for detection, if
it is detected that the attribute value of the roaming control
label is 0, then it is determined to be impassable and another grid
cell is selected for re-detection, that is, the attribute value of
the roaming control label can be set according to different
conditions, and the roaming path can be dynamically adjusted. For
example, as a specific embodiment and referring to FIG. 5, the
attribute value of the roaming control label 1 is set as 0, the
attribute value of the roaming control label 2 is set as 1, and the
attribute value of the roaming control label 3 is set as 1, three
roaming control labels are described by way of example here, and
are not intended to limit the scope of the present disclosure.
[0040] Additionally, in the virtual reality system, when a roamer
roams in a virtual passage, shaking vision often occurs when
turning around a corner, so that the roaming process is not smooth
and the sense of reality is reduced. In order to solve such a
problem:
[0041] As another preferred embodiment of the present disclosure,
and referring to FIG. 6, the roaming path control unit 1 further
includes: a path section dividing processing module 17, configured
to divide the generated roaming path into a plurality of roaming
path sections according to the width of the passage; and
[0042] setting different resolutions for each roaming path section,
and reconstructing a roaming path section according to the
resolution of the roaming path section.
[0043] In particular, the width of the virtual passage determines
the movable range of the roaming path, higher resolution can be
adopted for path sections with a wider virtual passage width while
lower resolution can be adopted for sections with a narrower
virtual passage width, so that the roaming path is more adaptive to
the corresponding virtual passage, the roaming path is smoother,
that is, in various embodiments of the present disclosure, the same
roaming path is divided into different sections, and each section
adopts different resolutions, for example, the generated roaming
path is divided into two sections, a first section of roaming path
is reconstructed according to the passage width of the first
roaming path section, likewise, a second section of roaming path is
reconstructed according to the passage width of the second roaming
path section, after doing this, higher resolution is adopted for
path sections with a wider virtual passage width while lower
resolution is adopted for sections with a narrower virtual passage
width, since resolutions for each roaming path section are adaptive
to the width of the corresponding virtual passage, therefore, the
roaming path is smoother, the effect of shaking vision when turning
a corner is relatively reduced.
[0044] Those described above are just preferred embodiments of the
present disclosure and are not intended to limit the present
disclosure. Any modification, equivalent alternation, and
improvement made within the spirit and principle of the present
disclosure fall within the scope of the present disclosure.
* * * * *