CN108257219B - Method for realizing panoramic multipoint roaming - Google Patents
Method for realizing panoramic multipoint roaming Download PDFInfo
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Abstract
The invention discloses a method for realizing panoramic multipoint roaming, which comprises the following steps: s1: drawing a roaming path, S2: rendering a panorama, S3: acquisition coordinates, S4: generating a panoramic file, S5: acquiring the position of the spatial point, S6: the invention selects the cubic panorama as a research target, is beneficial to image storage and compression due to simple structure of the cubic panorama, is more suitable for multi-space free switching, is beneficial to virtual roaming of freely-designated roaming routes between the panoramas, realizes seamless multi-scene immersive experience, converts switching of a plurality of scenes into visual drawing operation in the expression of an actual three-dimensional roaming scene, and adopts different user-defined roaming route strategies aiming at different roaming scenes to realize high-quality virtual panorama roaming drawing.
Description
Technical Field
The invention relates to the technical field of tile multi-brick paving, in particular to a method for realizing panoramic multipoint roaming.
Background
The virtual reality technology is a new technology developed in the last three decades, integrates and synthesizes information technologies such as machine vision, computer graphic drawing, sensors, three-dimensional simulation, artificial intelligence and the like, constructs a virtual scene, and supports user interaction, thereby achieving the purpose that a user personally observes and even controls scene information. The virtual reality system needs to satisfy three characteristics: conception, immersion, interaction. Due to limitations in computer performance (computing power, storage power), computer graphics drawing three-dimensional scenes is often rough and does not provide sufficient immersion and sufficient interactivity. At present, the image drawing technology is developed rapidly, and an implementation means which can be borne by the current computer level is provided for scene vivid construction. A close-range small-area scene virtual roaming system constructed by the technology appears in the market, such as a virtual museum, a virtual landscape and the like. Currently, a roaming system for a three-dimensional virtual scene mostly adopts a mode similar to single scene switching, and a user can only jump to a certain scene by clicking a scene thumbnail. In the virtual roaming system established by combining fixed-point collected shot pictures into a panoramic image and then fusing a specific algorithm, the seamless virtual roaming of a user-defined route cannot be met by single jump type browsing. Namely, the user-defined multipoint roaming is realized in the virtual scene roaming. The panoramic multipoint roaming method is invented on the basis of the existing scene roaming technology by combining the actual situation.
Disclosure of Invention
The invention aims to provide a method for realizing panoramic multipoint roaming, which comprises the following specific steps:
s1: drawing a roaming path, drawing virtual position points roaming in each space on a planar design drawing of the panoramic scheme, wherein the points represent positions of the camera in the space, one space can have a plurality of points and can also draw points across scenes, the roaming points are drawn in sequence from a starting point to an end point to form a complete roaming path, and scenes can be freely switched according to the drawn paths in the actual roaming process;
s2: rendering a panoramic picture, rendering a cross panoramic picture according to a designed panoramic scheme, wherein each space corresponds to a segmentation picture of 6 surfaces and a preview picture of the current panoramic scheme, rendering a finished picture storage server, and simultaneously recording a corresponding path for a panoramic display engine to obtain a corresponding panoramic picture;
s3: collecting coordinates, recording space point coordinates in S1 in the rendering process of S2, storing the coordinate points in a database, and simultaneously recording scene information and a browsing path in S1;
s4: generating a panoramic file, and generating a panoramic roaming file to be displayed according to the data of S2 and S3, wherein the panoramic roaming file comprises panoramic roaming scene information, path information, hot spot plane coordinates and the like;
s5: acquiring the position of a space point, acquiring the coordinate position of the space point in each scene by using a specific algorithm and combining scene information parameters according to the panoramic roaming file of S4, acquiring the positions of multiple points, and extracting the position of the space point from the panoramic display file, wherein the specific method comprises the following steps:
(1) the coordinates P (x, y) of the plane points in the current scene, the camera height H,
(2) plane coordinates P1(x1, y1) of the next scene are obtained,
(3) taking the difference value of P (x, y) and P1(x1, y1) to obtain P2(x1-x, y1-y), namely P2(m, n),
(4) the azimuth angle P2 to the camera is calculated using the arctan function. The formula is as follows:
F＝Math.atan2(n,m)*180.0/Math.PI+90；
where n is the difference between the next scene and the current scene with respect to the y-axis of the camera coordinates, m is the difference between the next scene and the current scene with respect to the x-axis of the camera coordinates,
(5) the distance from P2(m, n) to the camera is calculated as follows:
D＝Math.pow((m2+n2),0.5)；
(6) the azimuth angle from the current scene camera to P2 is calculated by using an arctangent function, and the formula is as follows:
T＝Math.atan(H/D)*180/Math.PI；
h is the height value of the camera in the current scene, the height value is fixed relative to the same scene, and D is the distance from a point P2 to the center coordinate of the camera;
(7) the hot spot scaling is calculated and,
S＝T/90*1.5；
wherein T is an azimuth angle from the current scene to a P2 coordinate, the hot spot scaling is determined by dividing the azimuth angle by 90 degrees and multiplying the azimuth angle by a factor of 1.5 times, and the closer the hot spot is to the center point of the camera, the farther the hot spot is, the smaller the hot spot is;
(8) calculating the self rotation degree of the current hot spot
R＝T-90；
Wherein T is an azimuth angle from a current scene camera to P2, T-90 degrees obtains an angle position of a current hot spot rotating by +/-90 degrees on the same plane, and the larger the distance of a camera point deviating from the center is, the more the shape of the hot spot tends to be an ellipse;
(9) determining the position of the current hotspot in space according to the calculated P2(m, n) coordinate, the distance D of P2 from the center point of the camera, and the azimuth angle of P2 relative to the center point of the camera;
the relative positions of the current space and other hot spots are changed after the scene is refreshed, so that the current space is the next scene relative to other hot spots, and the drawing of the hot spot roaming path is synchronously refreshed according to the real-time scene conversion;
s6: and drawing a multipoint path, acquiring coordinates of path points in the virtual scene according to the steps, and drawing the multipoint roaming path in the corresponding scene by using an image drawing technology.
Compared with the prior art, the invention has the beneficial effects that:
(1) the cubic panorama is selected as a research target, and the cubic panorama has a simple structure, is beneficial to image storage and compression, is more suitable for multi-space free switching, is beneficial to virtual roaming of freely-specified roaming routes among panoramas, and realizes seamless multi-scene immersive experience;
(2) in the actual three-dimensional roaming scene expression, the switching of a plurality of scenes is converted into visual drawing operation, and different user-defined roaming route strategies are adopted for different roaming scenes, so that the roaming drawing of the high-quality virtual panoramic image is realized;
(3) the method adopts the drawing technology based on the image to avoid the harsh requirement of huge data volume on system hardware during the reconstruction of the three-dimensional scene, ensures that the scene roaming which is as coherent as possible is obtained by using the path coordinate data as little as possible through reasonably drawing the panoramic path points, and further completes the seamless immersive virtual roaming of any specified path without restriction;
(4) the invention realizes the operation of switching the visual panoramic roaming scene. The method for switching the roaming scene with the self-defined path in the multipoint and multi-scene is simple, efficient and practical. The actual interactive experience in the panoramic roaming use process is improved.
Drawings
FIG. 1 is a schematic view of a 2D mode panoramic path rendering according to the present invention;
FIG. 2 is a schematic view of a 3D mode panoramic path of the present invention;
FIG. 3 is a schematic view of the panoramic multipoint calculation of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
Referring to fig. 1-3, the present invention provides a technical solution: a method for realizing panoramic multipoint roaming comprises the following steps:
s1: drawing a roaming path, drawing virtual position points roaming in each space on a planar design drawing of the panoramic scheme, wherein the points represent positions of the camera in the space, one space can have a plurality of points and can also draw points across scenes, the roaming points are drawn in sequence from a starting point to an end point to form a complete roaming path, and scenes can be freely switched according to the drawn paths in the actual roaming process;
s2: rendering a panoramic picture, rendering a cross panoramic picture according to a designed panoramic scheme, wherein each space corresponds to a segmentation picture of 6 surfaces and a preview picture of the current panoramic scheme, rendering a finished picture storage server, and simultaneously recording a corresponding path for a panoramic display engine to obtain a corresponding panoramic picture;
s3: collecting coordinates, recording space point coordinates in S1 in the rendering process of S2, storing the coordinate points in a database, and simultaneously recording scene information and a browsing path in S1;
s4: generating a panoramic file, and generating a panoramic roaming file to be displayed according to the data of S2 and S3, wherein the panoramic roaming file comprises panoramic roaming scene information, path information, hot spot plane coordinates and the like;
s5: acquiring the position of a space point, acquiring the coordinate position of the space point in each scene by using a specific algorithm and combining scene information parameters according to the panoramic roaming file of S4, acquiring the positions of multiple points, and extracting the position of the space point from the panoramic display file, wherein the specific method comprises the following steps:
(1) the coordinates P (x, y) of the plane points in the current scene, the camera height H,
(2) plane coordinates P1(x1, y1) of the next scene are obtained,
(3) taking the difference value of P (x, y) and P1(x1, y1) to obtain P2(x1-x, y1-y), namely P2(m, n),
(4) the azimuth angle P2 to the camera is calculated using the arctan function. The formula is as follows:
F＝Math.atan2(n,m)*180.0/Math.PI+90；
where n is the difference between the next scene and the current scene with respect to the y-axis of the camera coordinates, m is the difference between the next scene and the current scene with respect to the x-axis of the camera coordinates,
(5) the distance from P2(m, n) to the camera is calculated as follows:
D＝Math.pow((m2+n2),0.5)；
(6) the azimuth angle from the current scene camera to P2 is calculated by using an arctangent function, and the formula is as follows:
T＝Math.atan(H/D)*180/Math.PI；
h is the height value of the camera in the current scene, the height value is fixed relative to the same scene, and D is the distance from a point P2 to the center coordinate of the camera;
(7) the hot spot scaling is calculated and,
S＝T/90*1.5；
wherein T is an azimuth angle from the current scene to a P2 coordinate, the hot spot scaling is determined by dividing the azimuth angle by 90 degrees and multiplying the azimuth angle by a factor of 1.5 times, and the closer the hot spot is to the center point of the camera, the farther the hot spot is, the smaller the hot spot is;
(8) calculating the self rotation degree of the current hot spot
R＝T-90；
Wherein T is an azimuth angle from a current scene camera to P2, T-90 degrees obtains an angle position of a current hot spot rotating by +/-90 degrees on the same plane, and the larger the distance of a camera point deviating from the center is, the more the shape of the hot spot tends to be an ellipse;
(9) determining the position of the current hotspot in space according to the calculated P2(m, n) coordinate, the distance D of P2 from the center point of the camera, and the azimuth angle of P2 relative to the center point of the camera;
the relative positions of the current space and other hot spots are changed after the scene is refreshed, so that the current space is the next scene relative to other hot spots, and the drawing of the hot spot roaming path is synchronously refreshed according to the real-time scene conversion;
s6: and drawing a multipoint path, acquiring coordinates of path points in the virtual scene according to the steps, and drawing the multipoint roaming path in the corresponding scene by using an image drawing technology.
Once the panorama and the related scene information are dynamically loaded from the panorama file, a panorama multipoint roaming path can be generated in real time. The whole process is processed on line, at present, the ultra-high-definition panoramic image can be completely displayed within a plurality of seconds, and near real-time multipoint path real-time drawing is basically realized.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (1)
1. A method for realizing panoramic multipoint roaming is characterized in that: the method for realizing the panoramic multipoint roaming specifically comprises the following steps:
s1: drawing a roaming path, drawing virtual position points roaming in each space on a planar design drawing of the panoramic scheme, wherein the points represent positions of the camera in the space, one space can have a plurality of points and can also draw points across scenes, the roaming points are drawn in sequence from a starting point to an end point to form a complete roaming path, and scenes can be freely switched according to the drawn paths in the actual roaming process;
s2: rendering a panoramic picture, rendering a cross panoramic picture according to a designed panoramic scheme, wherein each space corresponds to a segmentation picture of 6 surfaces and a preview picture of the current panoramic scheme, rendering a finished picture storage server, and simultaneously recording a corresponding path for a panoramic display engine to obtain a corresponding panoramic picture;
s3: collecting coordinates, recording space point coordinates in S1 in the rendering process of S2, storing the coordinate points in a database, and simultaneously recording scene information and a browsing path in S1;
s4: generating a panoramic file, and generating a panoramic roaming file to be displayed according to the data of S2 and S3, wherein the panoramic roaming file comprises panoramic roaming scene information, path information and hot spot plane coordinates;
s5: acquiring the position of a space point, acquiring the coordinate position of the space point in each scene by using a specific algorithm and combining scene information parameters according to the panoramic roaming file of S4, acquiring the positions of multiple points, and extracting the position of the space point from the panoramic display file, wherein the specific method comprises the following steps:
(1) the coordinates P (x, y) of the plane points in the current scene, the camera height H,
(2) plane coordinates P1(x1, y1) of the next scene are obtained,
(3) taking the difference value of P (x, y) and P1(x1, y1) to obtain P2(x1-x, y1-y), namely P2(m, n),
(4) the azimuth angle P2 to the camera is calculated using the arctangent function, as follows:
F＝Math.atan2(n,m)*180.0/Math.PI+90；
where n is the difference between the next scene and the current scene with respect to the y-axis of the camera coordinates, m is the difference between the next scene and the current scene with respect to the x-axis of the camera coordinates,
(5) the distance from P2(m, n) to the camera is calculated as follows:
D＝Math.pow((m2+n2),0.5)；
(6) the azimuth angle from the current scene camera to P2 is calculated by using an arctangent function, and the formula is as follows:
T＝Math.atan(H/D)*180/Math.PI；
h is the height value of the camera in the current scene, the height value is fixed relative to the same scene, and D is the distance from a point P2 to the center coordinate of the camera;
(7) the hot spot scaling is calculated and,
S＝T/90*1.5；
wherein T is an azimuth angle from the current scene to a P2 coordinate, the hot spot scaling is determined by dividing the azimuth angle by 90 degrees and multiplying the azimuth angle by a factor of 1.5 times, and the closer the hot spot is to the center point of the camera, the farther the hot spot is, the smaller the hot spot is;
(8) calculating the self rotation degree of the current hot spot
R＝T-90；
Wherein T is an azimuth angle from a current scene camera to P2, T-90 degrees obtains an angle position of a current hot spot rotating by +/-90 degrees on the same plane, and the larger the distance of a camera point deviating from the center is, the more the shape of the hot spot tends to be an ellipse;
(9) determining the position of the current hotspot in space according to the calculated P2(m, n) coordinate, the distance D of P2 from the center point of the camera, and the azimuth angle of P2 relative to the center point of the camera;
the relative positions of the current space and other hot spots are changed after the scene is refreshed, so that the current space is the next scene relative to other hot spots, and the drawing of the hot spot roaming path is synchronously refreshed according to the real-time scene conversion;
s6: and drawing a multipoint path, acquiring coordinates of path points in the virtual scene according to the steps, and drawing the multipoint roaming path in the corresponding scene by using an image drawing technology.
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