Introduction to parameters of CarSim pavement 3D shape file

summary

Carsim There are so many parameters set for the shape of the road surface , Spec,S Scale,L Tiles,L Start,L Stop,Div,Use,dS What is it all about ？ Mean? ？ A little summary , Let's see ！

Parameter Introduction

1 and 2 No introduction , I don't use much , Didn't study it carefully

3、 Texture image of material

It includes various optional pavement materials .

4、Spec

Specular value specification ( Luster ).
High value means the surface is shiny , It's like a mirror . The value is 0 Indicates that the surface is dim .

5、S Scale

( scale 、 The proportion ) Texture graphics .
This parameter is used to specify the elongation ratio of the strip on the road . The road is actually just a map , Every Road The unit length of the file contains 20 A strip , The ratio of strip to interval is approximately 2:3. This value is generally set to 20.

6、L Tiles

Is the number of times the texture image is repeated horizontally .

If L TIles = 0.5, Show half ,
If L TIles = 0.25, Show quarter ,
If L TIles = 0.1, Display one tenth .

7、L Start

If L Start The unit of is set to m, Then this value defines L A boundary value of .

8、 Unit settings

9、L Stop

If L Stop The unit of is set to m, Then this value defines L The boundary value of . The strip will cover L Start To L Stop The scope of the .L Stop Is it greater than L Start Not important , Because the software will reverse these values when necessary . however ,L Stop Can not be equal to L Start.

10、 Unit settings

11、Div

If the value is X, It means horizontally , Divide the texture evenly and X Time .
If X = 1, Then average segmentation 1 Time . That is, the texture of this line is evenly divided into 2 Share ！
If X = 2, Then average segmentation 2 Time . That is, the texture of this line is evenly divided into 3 Share ！
If X = n, Then average segmentation n Time . That is, the texture of this line is evenly divided into n + 1 Share ！

Be careful ：Div Generally cooperate with the following Use Use it together , Otherwise Div The setting of may be meaningless ！

12、Use

Skip counter horizontally ( Use ), Allow skipping some partitions . If not specified , The application of 1 Count of , Indicates that each strip division is displayed . Count as 2 Means every division , Count as 3 Means every third , And so on . This option is included to effectively generate checkerboard or stripe patterns ( chart 13). It can be used to draw zebra crossing 、 Lots of parking spaces or regular lines .

If the value is Y, It means horizontally , Divide one into n Under the texture of , Every time Y Copies only show 1 Time , And it shows this Y The leftmost one in the copy .

If Y = 2, Then septum 1 Copies show one , namely 2 Only one copy will be displayed in the copy ！
If Y = 3, Then septum 2 Copies show one , namely 3 Only one copy will be displayed in the copy ！
If Y = n, Then septum n - 1 Copies show one , namely n Only one copy will be displayed in the copy ！ And it shows this n The leftmost one in the copy !

13、S Start

Site with path （Station, It can also be understood as the origin ） Set the starting position for the reference point .

14、S Stop

Site with path （Station, It can also be understood as the origin ） Set the stop position for the reference point .
Be careful ： Can be Station Comprehend One dimensional space A line of .

15、dS

Longitudinal spacing . This is related to Div The parameters are similar to , But relative to length （ The longitudinal ）, The function is to define the length of each rectangle . If the road is straight , The length can be as large as the length of the road (S Stop - S Start), That is, the road is only composed of a rectangle . For roads with curves or vertical changes , The interval should be short enough , To show the change of curve shape smoothly ( chart 14). Please note that , The smaller the interval , The larger the shape file , The longer the loading time . If not specified , Then use 2m The default value of .

At this time, the number of rectangles n = L / dS,（L = S Stop - S Start）. If L = 100m,dS = 0.5, be n = 200;

Be careful ：dS Generally cooperate with the following Use Use it together , Otherwise dS The setting of may be meaningless ！

16、Use

Vertical skip counter use , Allow skipping some partitions . With the above Use It does the same thing . If not specified , Then apply a 1 Count of , Indicates that each rectangle is displayed . Count as 2 each 2 Show once at a time , Count as 3 each 3 Show once at a time , And so on ( chart 15). It can be used to draw zebra crossing 、 Lots of parking spaces or regular lines .

Be careful ： And above 11、12 Part of the same , So I won't show the screenshot example .

17、dZ

This texture （ Strip ） stay Z The value on the axis , Height .

 The others are rarely used , No research ...

The next chapter introduces how to draw the parking line with the above parameters ！