CN117556639A - Three-dimensional slope construction method based on complex slope intersection automatic positioning technology - Google Patents
Three-dimensional slope construction method based on complex slope intersection automatic positioning technology Download PDFInfo
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Abstract
The invention discloses a three-dimensional slope construction method based on a complex slope intersection automatic positioning technology, which comprises the steps of obtaining original data for constructing a three-dimensional slope, constructing a U-shaped structure based on the original data, numbering the U-shaped structure, constructing rays for intersection according to the numbers, constructing slope intersections of adjacent slopes of each slope section according to the calculated intersection, performing intersection degradation treatment on the slope intersections to obtain a three-dimensional slope contour line, and constructing a slope triangular net based on the three-dimensional slope contour line to obtain a three-dimensional slope modeling result. The method is stable and efficient in calculation, saves time for slope software operation, has high accuracy of the obtained data result, reduces the times of error correction of manual errors and interaction times, and saves labor cost. The automatic degradation treatment of the slope intersecting line can meet the edge treatment of various complex slopes, and the output three-dimensional slope surface is presented in two forms of slope surface contour lines and slope surface triangular networks.
Description
Technical Field
The invention belongs to the technical field of three-dimensional slope model construction, and particularly relates to a three-dimensional slope construction method based on a complex slope intersection automatic positioning technology.
Background
The side slope refers to a slope surface with a certain gradient, such as a building slope, a foundation pit slope, a cutting slope, a embankment slope, a dam slope, a channel slope, a dam abutment slope, a reservoir slope, a strip mine slope, a waste residue field slope, etc. in the field of construction engineering, which are made on both sides of the roadbed, in order to ensure the stability of the roadbed. Some slopes have complex structures, large space spans or multi-level slope releasing conditions, and the existing three-dimensional construction method for the slope faces has numerous constraint conditions and complex calculation, so that the calculation time is long, the result accuracy is low, and the method is unfavorable for the subsequent excavation and backfill calculation of the slope face model. The currently known three-dimensional slope construction method comprises a two-dimensional model turning method, a three-dimensional lofting method and a triangular net shearing method, wherein the two-dimensional model turning method is to add elevation parameters on the basis of original two-dimensional data to directly form a three-dimensional slope model, and as the original two-dimensional intersection parameters are calculated in advance, manual intervention is needed to accurately model a completely vertical slope, and the efficiency and the accuracy are not high. The three-dimensional lofting method is to realize the upper and lower slope lines of the calculated slope surface, lofting is directly carried out by utilizing the self functions of CAD-like software, and then the intersecting line part is manually adjusted and subjected to error processing. The triangular net shearing method is to construct triangular net for each slope according to original parameters, and the slope intersecting line is obtained by intersecting triangular net of adjacent slopes, which has the defects that part of triangular net needs to be prolonged, operation efficiency is general, multiple degradation sequences are difficult to select, different operation results are adopted in different operation sequences, and some operation results do not meet engineering construction requirements. Therefore, a simple and smart method is needed to realize rapid and accurate slope modeling, and provide a calculation basis for subsequent applications.
Disclosure of Invention
In order to solve the problems, the invention provides a three-dimensional slope construction method based on a complex slope intersection automatic positioning technology, which aims to solve the problems of long calculation time and low result accuracy caused by numerous constraint conditions and complex calculation in the existing slope three-dimensional construction method.
In order to achieve the above purpose, the invention provides a three-dimensional slope construction method based on a complex slope intersection automatic positioning technology, comprising the following steps:
acquiring original data for constructing a three-dimensional slope;
constructing a U-shaped structure based on the original data and numbering the U-shaped structure;
constructing rays for intersection according to the numbers, and constructing slope intersection lines of adjacent slopes of each slope section according to the calculated intersection points;
performing intersection degradation treatment on the slope intersection to obtain a three-dimensional slope surface contour line;
and constructing a slope triangular net based on the three-dimensional slope contour line to obtain a three-dimensional slope modeling result.
According to one embodiment of the invention, the raw data includes coordinate data and data constraints for the ramp up line and each of the ramp segment ramp up lines.
According to a specific embodiment of the present invention, constructing a U-shaped structure based on the original data and numbering the U-shaped structure specifically includes:
setting the number of slope sections of the three-dimensional slope as n and the number of slope stage numbers as i based on the original data, constructing i slope surfaces in each slope section according to the number of slope stage numbers i, and setting a table surface between every two adjacent slope surfaces in the i slope surfaces to construct a U-shaped structure;
and numbering the corner points in the U-shaped structure of each slope section in sequence, wherein the corner point numbers of the two sides of the U-shaped structure, which are positioned at the same position, are mutually opposite numbers.
According to one embodiment of the invention, constructing ray intersections according to the numbers, and constructing slope intersection lines of adjacent slopes of each slope section according to the calculated intersections comprises:
selecting numbered points with opposite numbers in the U-shaped structures of every two adjacent slope sections to construct m/2 forward rays, and respectively calculating the intersection point of each forward ray and all slopes of the U-shaped structures of the second slope section to obtain a plurality of first intersection points, wherein m is the number of the numbered points of the U-shaped structures;
selecting number points with the number being opposite to each other in the U-shaped structures of every two adjacent slope sections to construct m/2 reverse rays, and respectively calculating the intersection points of each reverse ray and all slopes of the U-shaped structures of the first slope section to obtain a plurality of second intersection points;
judging correct intersection points in the first intersection points and the second intersection points to obtain first correct intersection points and second correct intersection points respectively;
and constructing slope intersecting lines of adjacent slopes of each slope section based on the first correct intersection point and the second correct intersection point.
According to a specific embodiment of the invention, the direction of the forward ray is directed from the U-shaped structure of the first slope segment to the U-shaped structure of the second slope segment.
According to one embodiment of the invention, the direction of the reverse ray is directed by the U-shaped configuration of the second slope segment to the U-shaped configuration of the first slope segment.
According to a specific embodiment of the present invention, determining correct intersection points among the plurality of first intersection points and the plurality of second intersection points, respectively, includes:
respectively calculating normal vectors of triangles formed by the first intersection point and the upper side line of the slope where the first intersection point is located and normal vectors of triangles formed by the first intersection point and the lower side line of the slope where the first intersection point is located, and if the two normal vectors are opposite, judging that the first intersection point is between the upper side line and the lower side line of the slope where the first intersection point is located, namely judging that the first intersection point is a first correct intersection point;
and respectively calculating normal vectors of the triangle formed by the second intersection point and the upper side line of the slope where the second intersection point is located and normal vectors of the triangle formed by the second intersection point and the lower side line of the slope where the second intersection point is located, and if the two normal vectors are opposite, judging that the second intersection point is between the upper side line and the lower side line of the slope where the second intersection point is located, namely judging that the second intersection point is a second correct intersection point.
According to a specific embodiment of the present invention, constructing a slope intersection of adjacent slopes of each slope segment based on the first correct intersection and the second correct intersection specifically includes:
and in the U-shaped structures of n slope sections, selecting a first correct intersection point and a second correct intersection point in each two adjacent slope section U-shaped structures to construct a slope intersection line, and constructing slope intersection lines of n-1 adjacent slopes altogether.
According to a specific embodiment of the present invention, performing intersection degradation processing on a slope intersection to obtain a three-dimensional slope surface contour line specifically includes:
starting from a first slope segment, selecting two intersecting slope top lines to determine a group of degradation ranges, wherein the two slope top lines are not adjacent;
acquiring slope intersecting lines of all slope segments in a degradation range, and calculating intersecting points of the slope intersecting lines to obtain a plurality of third intersecting points;
acquiring all intersecting lines associated with the third intersection point, and deleting invalid intersection points in the third intersection point according to the intersecting line position to obtain a third correct intersection point;
the third correct intersection points are sequenced from top to bottom and tree splitting is carried out, namely each third correct intersection point is split into all slope intersecting lines intersecting at the third correct intersection point;
and (3) starting from the slope segment after the current degradation range, repeating the steps to finish the slope intersection degradation treatment of all the slope segments, and obtaining the three-dimensional slope surface contour line.
According to a specific embodiment of the invention, constructing a slope triangle network based on three-dimensional slope contour lines, and obtaining a three-dimensional slope modeling result specifically comprises:
acquiring contour data of the three-dimensional slope surface of each slope section based on the contour line of the three-dimensional slope surface, wherein the contour data comprises numbered points and intersection points of a U-shaped structure;
and forming a plurality of local slope contours according to the contour data, and triangulating and networking the local slope contours by adopting a Dirony triangulating method to obtain a three-dimensional slope modeling result.
Compared with the prior art, the three-dimensional slope construction method based on the complex slope intersection automatic positioning technology provided by the invention has the advantages that the ray intersection calculation is constructed, and the slope intersection of adjacent slopes of each slope section is constructed according to the calculated intersection, the calculation process is based on the intersection process of the line surfaces, the calculation is stable and efficient, the modeling time is greatly shortened, the modeling efficiency is improved by 50% compared with the traditional method, the modeling can be completed only by half a day, the logic of the calculation method is simple, the calculation times are less in the computer implementation process, the accumulated error is small, the calculated data result accuracy is high, and in addition, the invention adopts the slope intersection automatic degradation method, the times of manual error correction and the interaction times are reduced, and the labor cost is saved. The automatic degradation treatment of the slope intersecting line can meet the edge treatment of various complex slopes, and the output three-dimensional slope surface is presented in two forms of slope surface contour lines and slope surface triangular networks.
Drawings
Fig. 1 is a flowchart of a method for constructing a three-dimensional slope surface according to an embodiment of the present invention.
Fig. 2 is a flowchart of a method for numbering U-shaped structures according to an embodiment of the present invention.
Fig. 3 is a flowchart of a slope intersection construction method according to an embodiment of the present invention.
Fig. 4 is a flowchart of a method for determining a first correct intersection point and a second correct intersection point according to an embodiment of the present invention.
Fig. 5 is a flowchart of a slope intersection degradation processing method according to an embodiment of the present invention.
Fig. 6 is a flowchart of a method for constructing a slope triangle network according to an embodiment of the present invention.
Fig. 7 is a schematic diagram of corner numbers in a U-shaped structure according to an embodiment of the present invention.
Fig. 8 is a schematic diagram of forward and reverse rays in a U-shaped structure according to an embodiment of the present invention.
FIG. 9 is a schematic diagram of a ray intersection result according to an embodiment of the present invention.
Fig. 10 is a schematic view of slope intersections of adjacent slopes of each slope segment according to an embodiment of the present invention.
FIG. 11 is a schematic diagram of valid and invalid intersections provided in accordance with an embodiment of the present invention.
Fig. 12 is a schematic diagram of tree splitting according to an embodiment of the present invention.
Detailed Description
In order to make the concept and idea of the present invention more clearly understood by those skilled in the art, the present invention is described in detail with reference to specific embodiments. It is to be understood that the embodiments presented herein are only a portion of all embodiments that the invention may have. Those skilled in the art, after having read the present specification, will be able to make modifications, alterations, or substitutions to some or all of the embodiments described below, which are also within the scope of the invention as claimed.
The terms "first," "second," and the like, herein do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The terms "a," "an," and other similar words are not intended to mean that there is only one thing, but rather that the description is directed to only one of the thing, which may have one or more. In this document, the terms "comprise," "include," and other similar words are intended to denote a logical relationship, but not to be construed as implying a spatial structural relationship. For example, "a includes B" is intended to mean that logically B belongs to a, and not that spatially B is located inside a. In addition, the terms "comprising," "including," and other similar terms should be construed as open-ended, rather than closed-ended. For example, "a includes B" is intended to mean that B belongs to a, but B does not necessarily constitute all of a, and a may also include other elements such as C, D, E.
The terms "embodiment," "this embodiment," "an embodiment," "one embodiment," and the like herein do not denote that the descriptions are merely applicable to one particular embodiment, but rather denote that the descriptions are also applicable to one or more other embodiments. It will be appreciated by those skilled in the art that any descriptions of one embodiment herein may be substituted, combined, or otherwise combined with those illustrated in another embodiment or embodiments, and that new embodiments may be substituted, combined, or otherwise combined as would be apparent to one skilled in the art and fall within the scope of the invention.
Example 1
Additional aspects and advantages of embodiments of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments of the invention. With reference to fig. 1 to fig. 12, an embodiment of the present invention provides a three-dimensional slope construction method based on a complex slope intersection automatic positioning technology, including:
s1: and obtaining the original data for constructing the three-dimensional slope, wherein the original data comprise slope starting lines, coordinate data of slope lines of each slope section and data constraint conditions, and the data constraint conditions comprise slope height, slope ratio, slope releasing stage number and the like.
S2: and constructing a U-shaped structure based on the original data and numbering the U-shaped structure. The calculation logic adopting the U-shaped data structure is simple, the calculation amount is small, and the overall calculation efficiency is higher.
S3: and constructing rays for intersection according to the numbers, and constructing slope intersection lines of adjacent slopes of each slope section according to the calculated intersection points.
S4: and performing intersection degradation treatment on the slope intersection to obtain a three-dimensional slope surface contour line.
S5: and constructing a slope triangular net based on the three-dimensional slope contour line to obtain a three-dimensional slope modeling result.
Specifically, step S2 of constructing a U-shaped structure based on the original data and numbering the U-shaped structure specifically includes:
s21: setting the number of slope sections of the three-dimensional slope as n and the number of slope stage numbers as i based on the original data, constructing i slope surfaces in each slope section according to the slope stage numbers i, and setting a table surface between every two adjacent slope surfaces in the i slope surfaces to construct a U-shaped structure. For example, the U-shaped structure shown in fig. 7 has a slope level of 2, so that 2 slopes are constructed on the slope section, and a table top is arranged between two adjacent slopes, wherein the surface (-3-2 22 3) is the table top.
S22: and numbering the corner points in the U-shaped structure of each slope section in sequence, wherein the corner point numbers of the two sides of the U-shaped structure, which are positioned at the same position, are mutually opposite numbers. For example, the U-shaped structure shown in fig. 7 is numbered sequentially at 8 corner positions of the U-shaped structure, wherein two corner positions at the ascending line are numbered-1 and 1, and are numbered-2, -3, -4,4 sequentially from the ascending line.
Specifically, step S3 of constructing a ray intersection according to the number, and constructing a slope intersection line of each adjacent slope of the slope segments according to the calculated intersection point includes:
s31: and selecting numbered points with opposite numbers in the U-shaped structures of every two adjacent slope sections to construct m/2 forward rays, and respectively calculating the intersection point of each forward ray and all slopes of the U-shaped structures of the second slope section to obtain a plurality of first intersection points, wherein m is the number of the numbered points of the U-shaped structures. The direction of the forward ray is directed from the U-shaped structure of the first slope segment to the U-shaped structure of the second slope segment. For example, the U-shaped structure shown in FIG. 8, ray B constructed by numbered points-2, 2 is a forward ray, the direction of which is directed from the current U-shaped structure to the U-shaped structure of the next slope segment.
S32: and selecting number points with the number being opposite to each other in the U-shaped structures of every two adjacent slope sections to construct m/2 reverse rays, and respectively calculating the intersection points of each reverse ray and all slopes of the U-shaped structures of the first slope section to obtain a plurality of second intersection points, wherein the direction of the reverse rays refers to the U-shaped structures of the first slope section from the U-shaped structures of the second slope section. For example, the U-shaped structure shown in FIG. 8, ray A constructed by numbered points 4, -4 is a reverse ray, the direction of which is directed from the current U-shaped structure to the U-shaped structure of the previous slope segment.
S33: judging the correct intersection point in the first intersection point and the second intersection point to respectively obtain the first correct intersection point and the second correct intersection point, specifically comprising:
s331, according to a triangle normal vector calculation method, respectively calculating normal vectors of triangles formed by the first intersection point and the upper side line of the slope where the first intersection point is located and normal vectors of triangles formed by the first intersection point and the lower side line of the slope where the first intersection point is located, and if the two normal vectors are opposite, judging that the first intersection point is between the upper side line and the lower side line of the slope where the first intersection point is located, namely judging that the first intersection point is a first correct intersection point. For example, two adjacent U-shaped structures shown in FIG. 9, the forward rays constructed by numbered points-2, 2 of the U-shaped structure of the first slope section are intersected with planes (-4, -3, 4) to obtain an intersection point P0, the intersection points P1 are intersected with planes (-2, -1, 2), the normal vector of the triangle formed by the intersection point P0 and the upper side line of the slope (-4, -3, 4) where the intersection point P0 is located is calculated to be opposite to the normal vector of the triangle formed by the lower side line of the slope (-4, -3, 4) where the intersection point P0 is located, and judging that the intersection point P0 is between the upper and lower side lines of the slope (-4, -3, 4) where the intersection point P0 is located, namely judging that the intersection point P0 is a correct intersection point, wherein the normal vector of the triangle formed by the intersection point P1 and the upper side line of the slope (-2, -1, 2) where the intersection point P1 and the normal vector of the triangle formed by the lower side line of the slope (-2, -1, 2) where the intersection point P1 is located are in the same direction, and judging that the intersection point P1 is not between the upper and lower side lines of the slope (-2, -1, 2) where the intersection point P1 is not a correct intersection point.
S332, respectively calculating normal vectors of the triangle formed by the second intersection point and the upper side line of the slope surface where the second intersection point is located and normal vectors of the triangle formed by the second intersection point and the lower side line of the slope surface where the second intersection point is located, and if the two normal vectors are opposite, judging that the second intersection point is between the upper side line and the lower side line of the slope surface where the second intersection point is located, namely judging that the second intersection point is a second correct intersection point.
S34: constructing a slope intersecting line of adjacent slopes of each slope section based on the first correct intersection point and the second correct intersection point, specifically comprising:
and in the U-shaped structures of n slope sections, selecting a first correct intersection point and a second correct intersection point in each two adjacent slope section U-shaped structures to construct a slope intersection line, and constructing slope intersection lines of n-1 adjacent slopes altogether. As shown in fig. 10, there are 5 slope segments, including 0,1,2,3, and 4, where each adjacent slope segment has a U-shaped structure that establishes a slope intersection, such as a slope intersection ab between a U-shaped structure a and a U-shaped structure B, a slope intersection bc between a U-shaped structure a and a U-shaped structure C, and a slope intersection bd between a U-shaped structure B and a U-shaped structure C.
The method is characterized in that the intersection calculation is carried out by constructing rays, and slope intersection lines of adjacent slopes of each slope section are constructed according to the calculated intersection points, the calculation process is based on the intersection process of the line surfaces, the calculation is stable and efficient, and the time is saved for the slope software operation.
Specifically, step S4 performs intersection degradation processing on the slope intersection, and the obtaining a three-dimensional slope surface contour line specifically includes:
s41: starting from the first slope segment, two intersecting slope top lines are selected to determine a set of degradation ranges, wherein the two slope top lines are not adjacent. For example: and (3) determining that the degradation range is 3-7 slope segments if the slope top line of the 3 rd slope segment is actually intersected with the slope top line of the 7 th slope segment.
S42: and acquiring slope intersecting lines of all the slope segments in the degradation range, and calculating the intersecting points of the slope intersecting lines to obtain a plurality of third intersecting points. The embodiment of the invention adopts a vector cross multiplication method to calculate the intersection point of the two slope intersecting lines. For example: the degradation range is that the 3-7 slope sections have 5 slopes, and the maximum intersection of every two slopes can obtain C (5, 2) =10 slope intersections, and every two 10 slope intersections can obtain the maximum intersection of C (10, 2) =45 adjacent slope intersections.
S43: and acquiring all intersecting lines associated with the third intersection point, and deleting invalid intersection points in the third intersection point according to the intersecting line positions to obtain a third correct intersection point. For example, in the slope intersection line diagram shown in fig. 11, circles and triangles in the diagram are third intersection points obtained through calculation, straight lines passing through the third intersection points are all intersection lines associated with the third intersection points, the intersection points at two triangles are determined to be invalid intersection points according to the intersection line positions, the intersection points in a circular area are third correct intersection points, the invalid intersection points are deleted, the correct intersection points are reserved, and the intersection points are arranged in the sequence from top to bottom.
S44: and ordering the third correct intersection points according to the sequence from top to bottom, and performing tree splitting, namely splitting each third correct intersection point into all slope intersecting lines intersecting at the third correct intersection point. For example, in the tree splitting graph shown in fig. 12, the intersection points in the three circle areas are third correct intersection points, tree splitting is performed on the three third correct intersection points in the order from top to bottom, and all slope intersecting lines intersecting with the third correct intersection points are split to obtain the tree splitting graph shown in fig. 12.
S45: and (3) starting from the slope segment after the current degradation range, repeating the steps to finish the slope intersection degradation treatment of all the slope segments, and obtaining the three-dimensional slope surface contour line.
The slope intersecting line automatic degradation treatment has the advantages that the accuracy of the obtained slope intersecting line result is high, the times of manual error correction and interaction times are reduced, the labor cost is saved, and the edge treatment of various complex slopes can be met.
Specifically, step S5 constructs a slope triangle net based on the three-dimensional slope contour line, and the obtaining of the three-dimensional slope modeling result specifically includes:
s51: and acquiring the contour data of the three-dimensional slope surface of each slope section based on the contour line of the three-dimensional slope surface, wherein the contour data comprises numbered points and intersection points of the U-shaped structure.
S52: and forming a plurality of local slope contours according to the contour data, and triangulating and networking the local slope contours by adopting a Dirony triangulating method to obtain a three-dimensional slope modeling result.
In a specific embodiment of the invention, local slope and table surface contours are constructed according to the numbered points and the intersecting points of the U-shaped structures of each slope section, a Dirony triangulation method is adopted to triangulate a plurality of local slope contours, the local three-dimensional slope modeling result of all slope sections is completed, the output three-dimensional slope is presented in two forms of slope contour lines and slope triangular nets, and the three-dimensional slope can be used for arranging supporting members (piles, beams, retaining walls, anchor rods, soil nails and the like) on the slope by subsequent software, can also be directly displayed, and can also be used for carrying out the original data of excavation and cutting operation with a geological triangular net.
In summary, the three-dimensional slope construction method based on the complex slope intersection automatic positioning technology provided by the invention constructs the ray intersection calculation, and constructs the slope intersection of adjacent slopes of each slope section according to the calculated intersection, the calculation process is based on the intersection of the line surfaces, the calculation is stable and efficient, the modeling time is greatly shortened, compared with the traditional method, the modeling efficiency is improved by 50%, the modeling can be completed only by half a day, the logic of the calculation method is simple, the calculation times are less in the computer implementation process, the accumulated error is small, the calculated data result accuracy is high, in addition, the invention adopts the slope intersection automatic degradation method, the times of manual error correction and the interaction times are reduced, and the labor cost is saved. The automatic degradation treatment of the slope intersecting line can meet the edge treatment of various complex slopes, and the output three-dimensional slope surface is presented in two forms of slope surface contour lines and slope surface triangular networks.
The concepts, principles and concepts of the invention have been described above in connection with specific embodiments (including examples and illustrations). It will be appreciated by those skilled in the art that embodiments of the invention are not limited to the forms set forth above, but that after reading the present specification, those skilled in the art can make any possible modifications, substitutions and equivalents of the steps, methods, systems, components of the above embodiments, which are intended to fall within the scope of the invention, which is defined only by the claims.
Claims (10)
1. A three-dimensional slope construction method based on a complex slope intersection automatic positioning technology is characterized by comprising the following steps:
acquiring original data for constructing a three-dimensional slope;
constructing a U-shaped structure based on the original data and numbering the U-shaped structure;
constructing a ray intersection according to the numbers, and constructing a slope intersection line of adjacent slopes of each slope section according to the calculated intersection point;
performing intersection degradation treatment on the slope intersection to obtain a three-dimensional slope surface contour line;
and constructing a slope triangular net based on the three-dimensional slope contour line to obtain a three-dimensional slope modeling result.
2. The method for constructing a three-dimensional slope surface based on the automatic positioning technology of intersecting lines of complex slope surfaces according to claim 1, wherein the raw data includes coordinate data and data constraint conditions of a rising slope line and each slope segment slope line.
3. The method for constructing a three-dimensional slope surface based on the automatic positioning technology of complex slope surface intersection lines according to claim 1, wherein the constructing a U-shaped structure based on the original data and numbering the U-shaped structure specifically comprises:
setting the number of slope sections of a three-dimensional slope as n and the number of slope stages as i based on the original data, constructing i slope surfaces in each slope section according to the number of slope stages i, and setting a table surface between every two adjacent slope surfaces in the i slope surfaces to construct a U-shaped structure;
and numbering the corner points in the U-shaped structure of each slope section in sequence, wherein the corner points on the two sides of the U-shaped structure and positioned at the same position are numbered in opposite numbers.
4. The method for constructing a three-dimensional slope surface based on the automatic positioning technology of complex slope surface intersection lines according to claim 1, wherein the steps of constructing ray intersection according to the number and constructing the slope surface intersection lines of adjacent slope surfaces of each slope section according to the calculated intersection points comprise:
selecting number points with opposite numbers in the U-shaped structures of every two adjacent slope sections to construct m/2 forward rays, and respectively calculating the intersection point of each forward ray and all slopes of the U-shaped structures of the second slope section to obtain a plurality of first intersection points, wherein m is the number of the number points of the U-shaped structures;
selecting number points with the number being opposite to each other in the U-shaped structures of every two adjacent slope sections to construct m/2 reverse rays, and respectively calculating the intersection points of each reverse ray and all slopes of the U-shaped structures of the first slope section to obtain a plurality of second intersection points;
judging correct intersection points in the first intersection points and the second intersection points to obtain first correct intersection points and second correct intersection points respectively;
and constructing slope intersecting lines of adjacent slopes of each slope section based on the first correct intersection point and the second correct intersection point.
5. The method for constructing a three-dimensional slope based on the automatic positioning technology of complex slope intersections of claim 4, wherein the direction of the forward ray is directed from the U-shaped structure of the first slope segment to the U-shaped structure of the second slope segment.
6. The method for constructing a three-dimensional slope based on the automatic positioning technology of complex slope intersection according to claim 4, wherein the direction of the reverse ray is from the U-shaped structure of the second slope section to the U-shaped structure of the first slope section.
7. The method for constructing a three-dimensional slope based on the automatic positioning technology of complex slope intersection lines according to claim 4, wherein the determining correct intersection points among the plurality of first intersection points and the plurality of second intersection points, respectively, comprises:
respectively calculating normal vectors of triangles formed by the first intersection point and the upper side line of the slope where the first intersection point is located and normal vectors of triangles formed by the first intersection point and the lower side line of the slope where the first intersection point is located, and if the two normal vectors are opposite, judging that the first intersection point is between the upper side line and the lower side line of the slope where the first intersection point is located, namely judging that the first intersection point is a first correct intersection point;
and respectively calculating normal vectors of triangles formed by the second intersection point and the upper side line of the slope where the second intersection point is located and normal vectors of triangles formed by the second intersection point and the lower side line of the slope where the second intersection point is located, and if the two normal vectors are opposite, judging that the second intersection point is between the upper side line and the lower side line of the slope where the second intersection point is located, namely judging that the second intersection point is a second correct intersection point.
8. The method for constructing a three-dimensional slope surface based on a complex slope surface intersection automatic positioning technology according to claim 4, wherein the constructing the slope surface intersection of each slope segment adjacent slope surface based on the first correct intersection point and the second correct intersection point specifically comprises:
and in the U-shaped structures of n slope sections, selecting the first correct intersection point and the second correct intersection point in each two adjacent slope section U-shaped structures to construct a slope intersection line, and constructing n-1 slope intersection lines of adjacent slopes altogether.
9. The method for constructing a three-dimensional slope surface based on the automatic positioning technology of complex slope surface intersection lines according to claim 1, wherein the performing intersection line degradation processing on the slope surface intersection lines to obtain three-dimensional slope surface contour lines specifically comprises:
starting from a first slope segment, selecting two intersecting slope top lines to determine a group of degradation ranges, wherein the two slope top lines are not adjacent;
acquiring slope intersecting lines of all slope segments in the degradation range, and calculating intersecting points of the slope intersecting lines to obtain a plurality of third intersecting points;
acquiring all intersecting lines associated with the third intersection point, and deleting invalid intersection points in the third intersection point according to the intersecting line position to obtain a third correct intersection point;
sorting the third correct intersection points according to the sequence from top to bottom and performing tree splitting, namely splitting each third correct intersection point into all slope intersecting lines intersecting at the third correct intersection point;
and (3) starting from the slope segment after the current degradation range, repeating the steps to finish the slope intersection degradation treatment of all the slope segments, and obtaining the three-dimensional slope surface contour line.
10. The method for constructing a three-dimensional slope surface based on the automatic positioning technology of complex slope surface intersecting lines according to claim 1, wherein the constructing a slope surface triangle network based on the three-dimensional slope surface contour lines specifically comprises the following steps:
acquiring contour data of the three-dimensional slope of each slope section based on the three-dimensional slope contour line, wherein the contour data comprises numbered points and intersection points of a U-shaped structure;
and forming a plurality of local slope contours according to the contour data, and triangulating and networking the local slope contours by adopting a Dirony triangulating method to obtain a three-dimensional slope modeling result.
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