plptex3: Write text inside the viewport of a 3D plot

`plptex3`: Write text inside the viewport of a 3D plot
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#### `plptex3`: Write text inside the viewport of a 3D plot

`plptex3 (` | wx ,
| wy ,
| wz ,
| dx ,
| dy ,
| dz ,
| sx ,
| sy ,
| sz ,
| just ,
| text `)`;

Writes text at a specified position and inclination and with a specified shear within the viewport. Text is clipped at the viewport boundaries. The reference point of a string lies along a line passing through the string at half the height of a capital letter. The position of the reference point along this line is determined by ``just`` , and the reference point is placed at world coordinates `(`wx`, `wy`, `wz`)` within the viewport. The inclination and shear of the string is specified in terms of differences of world coordinates making it easy to write text parallel to a line in a graph.

`wx` (``PLFLT``, input)

  x world coordinate of reference point of string.

`wy` (``PLFLT``, input)

  y world coordinate of reference point of string.

`wz` (``PLFLT``, input)

  z world coordinate of reference point of string.

`dx` (``PLFLT``, input)

  Together with ``dy` and `dz`` , this specifies the inclination of the string. The baseline of the string is parallel to a line joining `(`x`, `y`, `z`)` to `(`x`+`dx`, `y`+`dy`, `z`+`dz`)` .

`dy` (``PLFLT``, input)

  Together with ``dx` and `dz`` , this specifies the inclination of the string.

`dz` (``PLFLT``, input)

  Together with ``dx` and `dy`` , this specifies the inclination of the string.

`sx` (``PLFLT``, input)

  Together with ``sy` and `sz`` , this specifies the shear of the string. The string is sheared so that the characters are vertically parallel to a line joining `(`x`, `y`, `z`)` to `(`x`+`sx`, `y`+`sy`, `z`+`sz`)` . If ``sx` = `sy` = `sz` = 0.)` then the text is not sheared.

`sy` (``PLFLT``, input)

  Together with ``sx` and `sz`` , this specifies shear of the string.

`sz` (``PLFLT``, input)

  Together with ``sx` and `sy`` , this specifies shear of the string.

`just` (``PLFLT``, input)

  Specifies the position of the string relative to its reference point. If ``just`=0.` , the reference point is at the left and if ``just`=1.` , it is at the right of the string. Other values of ``just`` give intermediate justifications.

`text` (``PLCHAR_VECTOR``, input)

  A UTF-8 character string to be written out.

Redacted form: `plptex3(x, y, z, dx, dy, dz, sx, sy, sz, just, text)`

This function is used in example 28.

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