On 13-9-2013 10:25, Sven Littkowski wrote:
> Hi,
>
> here's something strange: I have the following source code of a union
> and a difference. But when using them, the 2nd element of each is being
> ignored. What do I do wrong?
>
> //--- UNION ----------------------------
>
> #declare Country = plane
> {
>   y, 0.0
>   pigment { color White }
> }
>
> #declare Plan = box
> {
>   < -5.0, 0.0, -1.0 > < 20.0, 0.0001, 15.0 >
>   pigment
>   {
>    checker
>    color White
>    color OrangeRed+Red
>   }
> }
>
> #declare Land = union
> {
>   object { Country }
>   object { Plan }
> }
>

This is a *declare* statement. In order to view it write:

object {Land}

Alternatively, you can also just write:

union {
  object { Country }
  object { Plan }
}

> ------
>
> But when using them without "union", they show up...
>
> object { Country }
> object { Plan }
>
>
> //--- DIFFERENCE ----------------------------
>
> #declare Cylinder_OverAll = cylinder
> {
>   < 7.5, -1.0, 0.0 > < 7.5, -1.0, 10.0 > 7.5
>   scale < 1.0, 0.5, 1.0 >
>   }
>
> #declare Cylinder_DivisionInside = cylinder
> {
>   < 7.5, -1.0, 0.0 > < 7.5, -1.0, 10.0 > 7.25
>   scale < 1.0, 0.5, 1.01 >
> }
>
> #declare Roof = difference
> {
>   object { Cylinder_OverAll }
>   object { Cylinder_DivisionInside scale < 1.0, 1.0, 2.0 > }
>   pigment { color White }
>   finish { Dull }
> }

Same thing here:

object {Roof}


Thomas

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