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This section will discuss the use of Surface object(s) to represent a 2D surface or a 3D volume if thickness parameter is specified.

To create a Surface object, at least three points are required. The values of these points at each corner of the surface must be determined in the coordinate system and the surface must be defined by connecting the points in a consecutive, counter-clockwise manner.

Surface objects conform to the cross-sectional definition of the assigned Alignment in the transverse direction.

Syantax:

...
<O T="Surface">
...
...
</O>

Example:

The "Surface" object combines the entered points and defines them as a surface. In simpler terms, the surface is formed by grouping each entered point under the Surface object.

<O N="SurfaceObject1" T="Project" Category="3D Geometric Objects">
    <!-- created by ParamML Examples on 31.01.2023 -->
    <O T="Surface" Z="20">
        <O T="Point" X="-10" Y="-10" />
        <O T="Point" X="10" Y="-10" />
        <O T="Point" X="10" Y="10" />
        <O T="Point" X="-10" Y="10" />
    </O>
</O>

To view this example in the library, see (https://openbrim.org/platform/?application=inc&author=ParamML_Examples_OpenBrIM+Platform&folder=3D+Geometric+Objects&obj=objidskk4yc2vmxerkzijy3xxwi)

Example:

<O N="SurfaceObject2" T="Project" Category="3D Geometric Objects" TransAlignRule="Right"> 
    <!-- created by ParamML Examples on 31.01.2023 -->
    <O N="HBeam" T="Surface">
        <O N="1stP" T="Point" X="1" Y="5" />
        <O N="2ndP" T="Point" X="7" Y="5" />
        <O N="3rdP" T="Point" X="7" Y="7" />
        <O N="4thP" T="Point" X="-7" Y="7" />
        <O N="5thP" T="Point" X="-7" Y="5" />
        <O N="6thP" T="Point" X="-1" Y="5" />
        <O N="7thP" T="Point" X="-1" Y="-5" />
        <O N="8thP" T="Point" X="-7" Y="-5" />
        <O N="9thP" T="Point" X="-7" Y="-7" />
        <O N="10thP" T="Point" X="7" Y="-7" />
        <O N="11thP" T="Point" X="7" Y="-5" />
        <O N="12thP" T="Point" X="1" Y="-5" />
    </O>
</O>

If point objects are not entered consecutively, the surface may not be created as desired or an error may occur.

<O N="SurfaceObject2" T="Project" Category="3D Geometric Objects" TransAlignRule="Right">
    <!-- created by ParamML Examples on 31.01.2023 -->
    <O N="HBeam" T="Surface">
        <O N="1stP" T="Point" X="1" Y="5" />
        <O N="2ndP" T="Point" X="7" Y="5" />
        <O N="3rdP" T="Point" X="7" Y="7" />
        <O N="4thP" T="Point" X="-7" Y="7" />
        <O N="5thP" T="Point" X="-7" Y="5" />
        <O N="6thP" T="Point" X="-1" Y="5" />
        <O N="7thP" T="Point" X="-1" Y="-5" />
        <O N="8thP" T="Point" X="-7" Y="-5" />
        <O N="9thP" T="Point" X="-7" Y="-7" />
        <O N="11thP" T="Point" X="7" Y="-5" />
        <O N="10thP" T="Point" X="7" Y="-7" />
        <O N="12thP" T="Point" X="1" Y="-5" />
    </O>
</O>

Therefore, the order in which the points are entered is important. If the points are entered in the wrong order, the surface will not be formed correctly.

To view this example in the library, see (https://openbrim.org/platform/?application=inc&author=ParamML_Examples_OpenBrIM+Platform&obj=objidbveqbtvtsmlok7f4rym85&folder=3D+Geometric+Objects)

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