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Separate out base hole generation

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Simplifies code for gridfinityBase, and prepares for future work.
This commit is contained in:
Arthur Moore 2024-10-27 10:56:53 -04:00
parent fa942bf5f5
commit dc13ebc107
2 changed files with 54 additions and 45 deletions
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2
src/core/gridfinity-rebuilt-holes.scad
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@ -263,7 +263,7 @@ module assert_hole_options_valid(hole_options) {
* @brief A single magnet/screw hole. To be cut out of the base.
* @details Supports multiple options that can be mixed and matched.
* @pram hole_options @see bundle_hole_options
* @param o Offset
* @param o offset Grows or shrinks the final shapes. Similar to `scale`, but in mm.
*/
module block_base_hole(hole_options, o=0) {
assert_hole_options_valid(hole_options);

97
src/core/gridfinity-rebuilt-utility.scad
View file

@ -249,7 +249,7 @@ module gridfinityBase(grid_size, grid_dimensions=GRID_DIMENSIONS_MM, hole_option
final_grid_size = [grid_size.x * divisions_per_grid.x, grid_size.y * divisions_per_grid.y];
base_center_distance_mm = [grid_dimensions.x / divisions_per_grid.x, grid_dimensions.y / divisions_per_grid.y];
individual_base_size_mm = [base_center_distance_mm.x, base_center_distance_mm.y] - gap_mm;
individual_base_size_mm = base_center_distance_mm - gap_mm;
// Final size of the base top. In mm.
// subtracting gap_mm here to remove an outer lip along the peremiter.
@ -265,24 +265,11 @@ module gridfinityBase(grid_size, grid_dimensions=GRID_DIMENSIONS_MM, hole_option
}
if(only_corners) {
hole_position = foreach_add(
grid_size_mm/2,
- HOLE_DISTANCE_FROM_BOTTOM_EDGE - BASE_PROFILE_MAX.x
);
difference(){
pattern_linear(final_grid_size.x, final_grid_size.y, base_center_distance_mm.x, base_center_distance_mm.y)
block_base(bundle_hole_options(), 0, individual_base_size_mm, thumbscrew=thumbscrew);
copy_mirror([0, 1, 0]) {
copy_mirror([1, 0, 0]) {
translate([
hole_position.x,
hole_position.y,
0
])
block_base_hole(hole_options, off);
}
}
_base_holes(hole_options, off, grid_size_mm);
}
}
else {
@ -306,6 +293,30 @@ module base_polygon() {
polygon(solid_profile);
}
/**
* @brief A single solid Gridfinity base.
* @param top_dimensions [x, y] size of a single base. Only set if deviating from the standard!
*/
module base_solid(top_dimensions=BASE_TOP_DIMENSIONS) {
assert(is_list(top_dimensions) && len(top_dimensions) == 2);
base_bottom = base_bottom_dimensions(top_dimensions);
sweep_inner = foreach_add(base_bottom, -2*BASE_BOTTOM_RADIUS);
cube_size = foreach_add(base_bottom, -BASE_BOTTOM_RADIUS);
assert(sweep_inner.x > 0 && sweep_inner.y > 0,
str("Minimum size of a single base must be greater than ", 2*BASE_TOP_RADIUS)
);
union(){
sweep_rounded(sweep_inner)
base_polygon();
translate([0, 0, BASE_HEIGHT/2])
cube([cube_size.x, cube_size.y, BASE_HEIGHT], center=true);
}
}
/**
* @brief Internal function to create the negative for a Gridfinity Refined thumbscrew hole.
* @details Magic constants are what the threads.ScrewHole function does.
@ -318,52 +329,50 @@ module _base_thumbscrew() {
);
}
/**
* @brief Internal Code. Generates the 4 holes for a single base.
* @details Need this fancy code to support refined holes and non-square bases.
* @param hole_options @see bundle_hole_options
* @param offset @see block_base_hole.offset
*/
module _base_holes(hole_options, offset=0, top_dimensions=BASE_TOP_DIMENSIONS) {
hole_position = foreach_add(
base_bottom_dimensions(top_dimensions)/2,
-HOLE_DISTANCE_FROM_BOTTOM_EDGE
);
for(a=[0:90:270]){
// i and j represent the 4 quadrants.
// The +1 is used to keep any values from being exactly 0.
j = sign(sin(a+1));
i = sign(cos(a+1));
translate([i * hole_position.x, j * hole_position.y, 0])
rotate([0, 0, a])
block_base_hole(hole_options, offset);
}
}
/**
* @brief A single Gridfinity base. With holes (if set).
* @param hole_options @see block_base_hole.hole_options
* @param off
* @param offset Grows or shrinks the final shapes. Similar to `scale`, but in mm.
* @param top_dimensions [x, y] size of a single base. Only set if deviating from the standard!
* @param thumbscrew Enable "gridfinity-refined" thumbscrew hole in the center of each base unit. This is a ISO Metric Profile, 15.0mm size, M15x1.5 designation.
*/
module block_base(hole_options, off=0, top_dimensions=BASE_TOP_DIMENSIONS, thumbscrew=false) {
module block_base(hole_options, offset=0, top_dimensions=BASE_TOP_DIMENSIONS, thumbscrew=false) {
assert(is_list(top_dimensions) && len(top_dimensions) == 2);
assert(is_bool(thumbscrew));
base_bottom = base_bottom_dimensions(top_dimensions);
sweep_inner = foreach_add(base_bottom, -2*BASE_BOTTOM_RADIUS);
cube_size = foreach_add(base_bottom, -BASE_BOTTOM_RADIUS);
assert(sweep_inner.x > 0 && sweep_inner.y > 0,
str("Minimum size of a single base must be greater than ", 2*BASE_TOP_RADIUS)
);
render(convexity = 2)
difference() {
union(){
sweep_rounded(sweep_inner)
base_polygon();
translate([0, 0, BASE_HEIGHT/2])
cube([cube_size.x, cube_size.y, BASE_HEIGHT], center=true);
}
base_solid(top_dimensions);
if (thumbscrew) {
_base_thumbscrew();
}
// 4 holes
// Need this fancy code to support refined holes and non-square bases.
for(a=[0:90:270]){
// i and j represent the 4 quadrants.
// The +1 is used to keep any values from being exactly 0.
j = sign(sin(a+1));
i = sign(cos(a+1));
translate([
i * (base_bottom.x/2 - HOLE_DISTANCE_FROM_BOTTOM_EDGE),
j * (base_bottom.y/2 - HOLE_DISTANCE_FROM_BOTTOM_EDGE),
0])
rotate([0, 0, a])
block_base_hole(hole_options, off);
}
_base_holes(hole_options, offset, top_dimensions);
}
}