CN110598319A - Rule grammar for space division based on variable parameters - Google Patents

Abstract

The invention discloses a rule grammar for space division based on variable parameters, which comprises grammar definition and grammar analysis, wherein the grammar definition is used for setting accurate numerical value nodes, has no mutual influence relation with other nodes and determines the length of the grammar; and (3) relative node: the proportion part is provided, and the lengths except the accurate node are distributed in proportion to other relative nodes; multiples of exact numerical values: after the ratio calculation, the system calculates a value that is an exact numerical multiple less than the total length of the segment. The rule grammar of the space division based on the variable parameters can be realized, a user can rapidly divide and express the parameterization of the region and the space without setting complex parameters and writing according to the grammar mode set by the system, the user's hands difficulty is reduced, and the modeling efficiency is improved.

Description

Rule grammar for space division based on variable parameters

The technical field is as follows:

the invention relates to the field of home decoration, in particular to a rule grammar for space division based on variable parameters.

Background art:

the parametric modeling is a computer aided design method and is an important process of parametric design. A parameterized model of the real-world object is constructed through a parameterized modeling tool, and the parameterized model is not only consistent with the three-dimensional appearance of the real-world object, but also has a complete information base consistent with the actual object. The information base enables the parameterized model to be applied not only in design, but also in other links of a supply chain such as model production and transportation. For the plate type household industry, parameters are not fixed but change within a certain range, so that the plate type household appliance has multiple purposes, and the efficiency of links such as design and modeling is improved.

The part of the core of the parametric modeling is how to record real-world information in a parametric manner, and allow the parameters to be changed and adjusted within a certain range.

At present, although partial local software and partial cloud software have the capability of realizing partial parameterization, common parameterization software in the market is very complex in size setting and high in setting difficulty, and is not combined with common modeling behaviors at present, so that the modeling efficiency is relatively low.

The invention content is as follows:

the technical problem to be solved by the invention is to provide a simple rule grammar based on space division of variable parameters, which can realize that a user can quickly partition and express parameterization of regions and spaces without setting complex parameters and writing according to a grammar mode set by a system, thereby reducing the user's hands difficulty and improving the modeling efficiency.

The technical solution of the present invention is to provide a rule grammar for variable parameter based spatial partitioning, including grammar definition and grammar parsing, wherein,

the syntax is defined as follows,

the method is used for setting accurate numerical value nodes, wherein the accurate numerical value nodes have no mutual influence relation with other nodes and determine the length of the nodes by self;

and (3) relative node: the proportion part is provided, and the lengths except the accurate node are distributed in proportion to other relative nodes;

multiples of exact numerical values: after the proportion is calculated, the system calculates the value which is smaller than the total length of the segment and is the multiple of the accurate numerical value;

combining nodes: all other nodes are combined by the identifier defined by the system, and the length of the combined node is calculated by the system;

and (4) allowance node: the length is determined by the total length and all other types of nodes;

the order of parsing the above-described syntax is as follows,

step 1, analyzing the whole parameterized statement, finding a part of a reference parameter, preferentially analyzing the parameter part, and analyzing a specific numerical value of the reference parameter;

step 2, expanding the simplified writing method in the grammar, and analyzing the semantics of the original user;

step 3, converting the part marked by the special symbol of the margin node in the grammar into the margin node used in the system calculation;

and 4, analyzing the whole grammar. If the grammar has errors, prompting the user not to carry out the next analysis, and if the grammar is correct, carrying out the step 6;

step 5, finding out all relative nodes and margin nodes and calculating the total length, the total proportion and the total margin multiple;

step 6, calculating the total length outside the accurate length;

step 7, calculating unit length according to the total length and the total proportion outside the accurate length, and setting the unit length for the relative node;

step 8, obtaining the total length of the allowance calculation allowance of all the relative nodes, calculating unit allowance according to the total length of the allowance and the multiple of the total allowance, and setting unit allowance for the allowance nodes;

and 9, calculating the length of each node according to the attributes and calculating the space defined mode.

Compared with the prior art, the invention has the following advantages after adopting the scheme: according to the invention, a complete parameterization grammar set is used, a parameterization scheme for defining the size and the dimension of the space can be rapidly set, and the setting efficiency of the size, the position and the like of the space is improved, so that the modeling efficiency is improved. Besides the first time, the grammar is divided through the simple proportion, so that a novice can quickly carry out parametric modeling, and the technical requirements on workers are reduced

The specific implementation mode is as follows:

the invention is further illustrated with respect to specific embodiments below:

example 1

A rule grammar based on space division of variable parameters includes grammar definition and grammar parsing,

step 1, filling out a sentence by a user according to grammar, wherein the concrete writing method of the grammar is as follows:

a node is identified between two';

taking a basic node as a unit, wherein the basic node supports multiplication and division;

each basic node can be combined into a combined node through "+", "-";

the multiples of the expression accuracy values, such as [32mm ], were identified as [ ]. The multiplication and division of "[ ]" can be placed before and after, such as 2 x 2[32mm ], can express 4[32mm ], 2[32mm ] x 2 can also express 4[32mm ];

parameters set by the system can be filled in the [ ] ", and parameter results in the [ ]" can be analyzed;

a repeated node can be replicated n times by expressing n '{ }';

when no relative node exists in the combined node, the accurate numerical value node in the combined node can be used as an accurate numerical value to be processed; when the combination node has a relative node, the accurate value in the combination node is used as the differential quantity of the relative node;

step 2, the first step is to process the SPEL grammar portion before entering the linear segmentation logic, with nodes identified in "[ ]" and not in "\\ \ d + mm ]" format considered as SPEL nested portions. And (4) analyzing the nested part, and replacing the contents in the brackets and the "[ ]" with analyzed numbers.

For example, W is 500, [ # W ] +50mm [ # W:200] mm:2[32mm ]: x would be treated as 500+50mm:500mm:2[32mm ]: x.

And step 3: and processing the part with simplified grammar. Namely "n { }": the local linear partitioning syntax bracketing "{ }" is copied n times.

Such as: 2 {1:1} will be processed to 1:1:1:1

And 4, step 4: analyzing the character string, and analyzing the residual node x into residual numerical values;

and 5: the logical part of the illegal grammar specification is processed and the user is prompted. Such as: the node can not be empty, the node can not be 0, [ ] the node must contain mm and the rest node.

Step 6: calculating a margin node;

6-1, finding out all relative nodes and margin nodes and calculating the total determined length, the total proportion and the total margin multiple;

6-2, calculating and determining the total length outside the length;

6-3, calculating the unit length according to the total length and the total proportion outside the determined length, and setting the unit length for the relative node;

6-4, obtaining the allowance of all relative nodes to calculate the total allowance length, calculating unit allowance according to the total allowance length and the total allowance multiple, and setting unit allowance for the allowance nodes;

6-5, each node calculates its own length according to the attributes.

Claims (1)

1. A rule grammar for variable parameter based spatial partitioning, characterized by: including grammar definitions and grammar parsing, wherein,

the syntax is defined as follows,

the method is used for setting accurate numerical value nodes, wherein the accurate numerical value nodes have no mutual influence relation with other nodes and determine the length of the nodes by self;

and (3) relative node: the proportion part is provided, and the lengths except the accurate node are distributed in proportion to other relative nodes;

multiples of exact numerical values: after the proportion is calculated, the system calculates the value which is smaller than the total length of the segment and is the multiple of the accurate numerical value;

combining nodes: all other nodes are combined by the identifier defined by the system, and the length of the combined node is calculated by the system;

and (4) allowance node: the length is determined by the total length and all other types of nodes;

the order of parsing the above-described syntax is as follows,

step 1, analyzing the whole parameterized statement, finding a part of a reference parameter, preferentially analyzing the parameter part, and analyzing a specific numerical value of the reference parameter;

step 2, expanding the simplified writing method in the grammar, and analyzing the semantics of the original user;

step 3, converting the part marked by the special symbol of the margin node in the grammar into the margin node used in the system calculation;

and 4, analyzing the whole grammar. If the grammar has errors, prompting the user not to carry out the next analysis, and if the grammar is correct, carrying out the step 6;

step 5, finding out all relative nodes and margin nodes and calculating the total length, the total proportion and the total margin multiple;

step 6, calculating the total length outside the accurate length;

step 7, calculating unit length according to the total length and the total proportion outside the accurate length, and setting the unit length for the relative node;

step 8, obtaining the total length of the allowance calculation allowance of all the relative nodes, calculating unit allowance according to the total length of the allowance and the multiple of the total allowance, and setting unit allowance for the allowance nodes;

and 9, calculating the length of each node according to the attributes and calculating the space defined mode.