> For the complete documentation index, see [llms.txt](https://docs.openbrim.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.openbrim.org/developers/paramml-developer-guide/core-objects/3d-geometric-objects/line.md).
# Line
In OpenBrIM, 3D representations can be defined using the following objects:
* Surface
* Volume
* Line
Each Line object must include:
* A first Point object
* A second Point object
* At least one Section/Shape/Surface object
Given two points and a cross section, OpenBrIM can render the line with the specified section profile. For polylines, multiple points can be specified, and a Line object can contain multiple Section objects if multiple points are defined in the line.
To create a line, two "point" objects are required that define the start and end of the line. These points are combined using the "line" object to express the line.
**Syntax:**
```
...
...
...
```
**Example:**
```xml
```
 The Line object is used in conjunction with the Section and Shape objects. To view this example in the library, see ()
```xml
```
 To view this example in the library, see ()
**Example:**
```xml
```
 To view this example in the library, see ()
**Example:**
```xml
```
The Line object is used in conjunction with the "Draw Face" and "Draw Border" parameters.  To view this example in the library, see ()
**Parameters:**
| # | Label | Mandatory | Name and Type Attributes | Default Description and Value Attributes | Other Attributes |
| -- | ------------------------- | --------- | --------------------------- | ----------------------------------------------------------------------------------------------------------------------- | ------------------------------------ |
| 1 | Curved | No | N="IsCurved" | D="Curved?: Does this line curve along alignment definitions. \[Yes=1/No=0]" V="0" | Role="Input" |
| 2 | Skew About X @ Start | No | N="StartSkewX" | D="Skew About X @ Start: The skew angle at the start of the line about X axis of the cross-section." V="0" | Role="Input" UT="Angle" UC="Section" |
| 3 | Skew About Y @ Start | No | N="StartSkewY" | D="Skew About Y @ Start: The skew angle at the start of the line about Y axis of the cross-section." V="0" | Role="Input" UT="Angle" UC="Section" |
| 4 | Skew About X @ End | No | N="EndSkewX" | D="Skew About X @ End: The skew angle at the end of the line about X axis of the cross-section." V="0" | Role="Input" UT="Angle" UC="Section" |
| 5 | Skew About Y @ End | No | N="EndSkewY" | D="Skew About Y @ End: The skew angle at the end of the line about Y axis of the cross-section." V="0" | Role="Input" UT="Angle" UC="Section" |
| 6 | Beta Angle | No | N="BetaAngle" | D="Beta Angle: The orientation angle to rotate the cross-section about the length of the line." V="0" | Role="Input" UT="Angle" UC="Section" |
| 7 | Section | No | N="Section" T="Section" | D="Section: The cross-section extruded along the length of the line's length." V="" | Role="Input" |
| 8 | Alignment | No | N="Alignment" T="Alignment" | D="Alignment: The alignment assignment of the object." V="" | Role="Input" |
| 9 | Draw Face A | No | N="DrawFaceA" | D="Draw Face A?: Should graphics display face A of this volume? \[Yes=1/No=0]" V="1" | Role="Input" |
| 10 | Draw Face B | No | N="DrawFaceB" | D="Draw Face B?: Should graphics display face B of this volume? \[Yes=1/No=0]" V="1" | Role="Input" |
| 11 | Draw Border | No | N="DrawBorder" | D="Draw Border?: Should graphics display a border along the lines connecting the faces? \[Yes=1/No=0]" V="1" | Role="Input" |
| 12 | Draw Border Around Face A | No | N="DrawFaceABorder" | D="Draw Border Around Face A?: Should graphics display a border around face A? \[Yes=1/No=0]" V="1" | Role="Input" |
| 13 | Draw Border Around Face B | No | N="DrawFaceBBorder" | D="Draw Border Around Face B?: Should graphics display a border around face B? \[Yes=1/No=0]" V="1" | Role="Input" |
| 14 | PolyLine | No | N="PolyLine" | D="Draw multiple lines? Multiple points can be placed, a line is formed between consecutive points \[Yes=1/No=0]" V="1" | Role="Input" |
---
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