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From: Sven Littkowski
Subject: QUESTION: union and difference not working properly?
Date: 13 Sep 2013 04:26:13
Message: <5232cc25$1@news.povray.org>
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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 }
}
------
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 }
}
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From: Thomas de Groot
Subject: Re: QUESTION: union and difference not working properly?
Date: 13 Sep 2013 07:06:10
Message: <5232f1a2$1@news.povray.org>
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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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