Basic parameterized case

Find code at https://github.com/greygoo/basic_case-parameterized

Simple parameterized case for openscad

Example

// Render options
case_part = "case_all";
render_mode = "normal";

// Board values
dim_board = [60,30,2];
space_top = 7;
space_bottom = 3;
space_bscrew = 1;

// Board Screw values
dia_bscrew = 3.2;
loc_bscrews = [[3.5,3.5],
[dim_board[0]-3.5,3.5],
[dim_board[0]-3.5,dim_board[1]-3.5],
[3.5,dim_board[1]-3.5]];

// Case Screw values
dia_cscrew = 3;
dia_chead = 5.5;
height_chead = 2.5;

// Case values
wall_frame = 1.2;
rim = 1;
mki = 2;

// ports
cuts = [[[0,0],[5,3],"front","sqr_indent"],
[[0,0],[5,3],"back","sqr_indent"],
[[0,0],[5,3],"left","sqr"],
[[0