Hello group,

Here I am again....

Nobody responded on my email, but a friend found the answer.

For those who are interested, here is the .cal file for rectangular perforations.

Iebele

{

perforate.cal

Perforation function for approximately horizontal sufaces,

for use in a mixfunc. Foreground is solid, background the holes.

Set background to empty for a true perforation, or to a different

material for polka dots.

Relative hole size is determined by A1.

Size of single circle is 1 - scale as required (eg. 0.05m).

x_hole cuts holes in x-direction (through the y-z plane)

y_hole cuts holes in y-direction (through the x-z plane)

z_hole cuts holes in z-direction (through the x-y plane)

A1 is de schaal

A2 XY size of hole ( 0.2 is small, 0.5 big )

A3 YZ size of hole

A4 XZ size of hole

Abel Boerema 2004, n.a.v.Georg Mischler 30. 04. 1993

}

`xn = mod(Px, 1) - A2;

`yn = mod(Py, 1) - A3;

`zn = mod(Pz, 1) - A4;

`outofcirc(x, y, r) = if( (if ( x-r, 0, 1 )) * (if (y-r, 0, 1)) , 0, 1 );

z_hole = `outofcirc(`xn, `yn, A1);

x_hole = `outofcirc(`yn, `zn, A1);

y_hole = `outofcirc(`zn, `xn, A1);

## ···

----

"toren.com architectuur visualisaties" wrote:

Hello group!

I once found a cal file from Georg Mischler for circular perforations.

Now I wondered how to create rectangular perforations in a similar way.

Who has an idea (Georg?).

Iebele

-------------------------------------------------------------------------------

{

perforate.cal

Perforation function for approximately horizontal sufaces,

for use in a mixfunc. Foreground is solid, background the holes.

Set background to empty for a true perforation, or to a

different

material for polka dots.

Relative hole size is determined by A1.

Size of single circle is 1 - scale as required (eg. 0.05m).

x_hole cuts holes in x-direction (through the y-z plane)

y_hole cuts holes in y-direction (through the x-z plane)

z_hole cuts holes in z-direction (through the x-y plane)

Georg Mischler 30. 04. 1993

}

`xn = mod(Px, 1) - 0.5;

`yn = mod(Py, 1) - 0.5;

`zn = mod(Pz, 1) - 0.5;

`outofcirc(x, y, r) = if(sqrt(x*x + y*y) - r, 1, 0);

z_hole = `outofcirc(`xn, `yn, A1);

x_hole = `outofcirc(`yn, `zn, A1);

y_hole = `outofcirc(`zn, `xn, A1);

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