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feat: prevent Z-fighting/flicker in OpenSCAD preview #141

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feat: prevent Z-fighting/flicker in OpenSCAD preview #141

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eededd4
feat: prevent Z-fighting/flicker in OpenSCAD preview
Dec 9, 2025
1415d3c
fix(core): Difference EPSILON in preview and render.
Dec 10, 2025
5b343e4
Merge branch 'main' into feat/Z-fight
spetzreborn Dec 10, 2025
5e98785
Merge branch 'main' into feat/Z-fight
spetzreborn Dec 16, 2025
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6 changes: 3 additions & 3 deletions models/core/lib/connector.scad
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Original file line number Diff line number Diff line change
Expand Up @@ -187,8 +187,8 @@ module connectorArmOuter(is_foot=false) {
difference() {
color(HR_YELLOW) cuboid(arm_dimensions_outer, chamfer=BASE_CHAMFER,except=BOTTOM);
if(!is_foot){
color(HR_RED) rotate([90, 0, 0]) cuboid([LOCKPIN_HOLE_SIDE_LENGTH, LOCKPIN_HOLE_SIDE_LENGTH, connector_outer_side_length], chamfer=-LOCKPIN_HOLE_CHAMFER);
color(HR_RED) rotate([90, 0, 90]) cuboid([LOCKPIN_HOLE_SIDE_LENGTH, LOCKPIN_HOLE_SIDE_LENGTH, connector_outer_side_length], chamfer=-LOCKPIN_HOLE_CHAMFER);
color(HR_RED) rotate([90, 0, 0]) cuboid([LOCKPIN_HOLE_SIDE_LENGTH, LOCKPIN_HOLE_SIDE_LENGTH, connector_outer_side_length + EPSILON], chamfer=-LOCKPIN_HOLE_CHAMFER);
color(HR_RED) rotate([90, 0, 90]) cuboid([LOCKPIN_HOLE_SIDE_LENGTH, LOCKPIN_HOLE_SIDE_LENGTH, connector_outer_side_length + EPSILON], chamfer=-LOCKPIN_HOLE_CHAMFER);
}
}
}
Expand All @@ -200,7 +200,7 @@ module connectorArmOuter(is_foot=false) {
*/
module connectorArmInner() {

arm_dimensions_inner = [arm_side_length_inner, arm_side_length_inner, BASE_UNIT];
arm_dimensions_inner = [arm_side_length_inner, arm_side_length_inner, BASE_UNIT + EPSILON];
color(HR_GREEN)
cuboid(arm_dimensions_inner, chamfer=BASE_CHAMFER,edges=BOTTOM);
}
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3 changes: 3 additions & 0 deletions models/core/lib/constants.scad
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Original file line number Diff line number Diff line change
Expand Up @@ -24,6 +24,9 @@
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.

// Prevent OpenSCAD Z-fighting in peview
EPSILON = $preview ? 0.01 : 0.00001;

// Fitting tolerance between mating parts
TOLERANCE = 0.2; // in mm

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2 changes: 1 addition & 1 deletion models/core/lib/lockpin.scad
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Original file line number Diff line number Diff line change
Expand Up @@ -191,6 +191,6 @@ module tension_hole_half(){
lockpin_tension_angle = 86.5; // in degrees
lockpin_tension_hole_width_inner = PRINTING_LAYER_WIDTH * 4; // widest/middle point of the tension hole
lockpin_tension_hole_height = BASE_UNIT / 2;
lockpin_tension_hole_inner_dimension = [lockpin_tension_hole_width_inner, lockpin_height]; // planar
lockpin_tension_hole_inner_dimension = [lockpin_tension_hole_width_inner, lockpin_height + EPSILON ]; // planar
prismoid(size1=lockpin_tension_hole_inner_dimension, height=lockpin_tension_hole_height, xang=lockpin_tension_angle, yang=90);
}
2 changes: 1 addition & 1 deletion models/core/lib/support.scad
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Original file line number Diff line number Diff line change
Expand Up @@ -89,7 +89,7 @@ module lock_pin_hole() {
union() {
prismoid(size1=lock_pin_center_dimension, size2=LOCKPIN_HOLE_SIDE_LENGTH_DIMENSION, h=lock_pin_prismoid_inner_length);
translate([0, 0, lock_pin_prismoid_inner_length]) {
prismoid(size1=LOCKPIN_HOLE_SIDE_LENGTH_DIMENSION, size2=lock_pin_outer_dimension, h=lock_pin_prismoid_outer_length);
prismoid(size1=LOCKPIN_HOLE_SIDE_LENGTH_DIMENSION, size2=lock_pin_outer_dimension, h=lock_pin_prismoid_outer_length + EPSILON);
}
}
}
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11 changes: 6 additions & 5 deletions models/core/makerworld/connector.scad
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Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,7 @@ is_foot = false; // [true,false]
optimal_orientation = true; // [true,false]

/* [Hidden] */
EPSILON = $preview ? 0.01 : 0.00001;
TOLERANCE = 0.2;
PRINTING_LAYER_WIDTH = 0.4;
PRINTING_LAYER_HEIGHT = 0.2;
Expand Down Expand Up @@ -85,7 +86,7 @@ module lock_pin_hole() {
union() {
prismoid(size1=lock_pin_center_dimension, size2=LOCKPIN_HOLE_SIDE_LENGTH_DIMENSION, h=lock_pin_prismoid_inner_length);
translate([0, 0, lock_pin_prismoid_inner_length]) {
prismoid(size1=LOCKPIN_HOLE_SIDE_LENGTH_DIMENSION, size2=lock_pin_outer_dimension, h=lock_pin_prismoid_outer_length);
prismoid(size1=LOCKPIN_HOLE_SIDE_LENGTH_DIMENSION, size2=lock_pin_outer_dimension, h=lock_pin_prismoid_outer_length + EPSILON);
}
}
}
Expand Down Expand Up @@ -203,15 +204,15 @@ module connectorArmOuter(is_foot=false) {
difference() {
color(HR_YELLOW) cuboid(arm_dimensions_outer, chamfer=BASE_CHAMFER,except=BOTTOM);
if(!is_foot){
color(HR_RED) rotate([90, 0, 0]) cuboid([LOCKPIN_HOLE_SIDE_LENGTH, LOCKPIN_HOLE_SIDE_LENGTH, connector_outer_side_length], chamfer=-LOCKPIN_HOLE_CHAMFER);
color(HR_RED) rotate([90, 0, 90]) cuboid([LOCKPIN_HOLE_SIDE_LENGTH, LOCKPIN_HOLE_SIDE_LENGTH, connector_outer_side_length], chamfer=-LOCKPIN_HOLE_CHAMFER);
color(HR_RED) rotate([90, 0, 0]) cuboid([LOCKPIN_HOLE_SIDE_LENGTH, LOCKPIN_HOLE_SIDE_LENGTH, connector_outer_side_length + EPSILON], chamfer=-LOCKPIN_HOLE_CHAMFER);
color(HR_RED) rotate([90, 0, 90]) cuboid([LOCKPIN_HOLE_SIDE_LENGTH, LOCKPIN_HOLE_SIDE_LENGTH, connector_outer_side_length + EPSILON], chamfer=-LOCKPIN_HOLE_CHAMFER);
}
}
}

module connectorArmInner() {

arm_dimensions_inner = [arm_side_length_inner, arm_side_length_inner, BASE_UNIT];
arm_dimensions_inner = [arm_side_length_inner, arm_side_length_inner, BASE_UNIT + EPSILON];
color(HR_GREEN)
cuboid(arm_dimensions_inner, chamfer=BASE_CHAMFER,edges=BOTTOM);
}
Expand Down Expand Up @@ -373,7 +374,7 @@ module tension_hole_half(){
lockpin_tension_angle = 86.5;
lockpin_tension_hole_width_inner = PRINTING_LAYER_WIDTH * 4;
lockpin_tension_hole_height = BASE_UNIT / 2;
lockpin_tension_hole_inner_dimension = [lockpin_tension_hole_width_inner, lockpin_height];
lockpin_tension_hole_inner_dimension = [lockpin_tension_hole_width_inner, lockpin_height + EPSILON ];
prismoid(size1=lockpin_tension_hole_inner_dimension, height=lockpin_tension_hole_height, xang=lockpin_tension_angle, yang=90);
}

Expand Down
11 changes: 6 additions & 5 deletions models/core/makerworld/lockpin.scad
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Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,7 @@ color(HR_YELLOW)
lockpin(grip_type=grip_type);

/* [Hidden] */
EPSILON = $preview ? 0.01 : 0.00001;
TOLERANCE = 0.2;
PRINTING_LAYER_WIDTH = 0.4;
PRINTING_LAYER_HEIGHT = 0.2;
Expand Down Expand Up @@ -85,7 +86,7 @@ module lock_pin_hole() {
union() {
prismoid(size1=lock_pin_center_dimension, size2=LOCKPIN_HOLE_SIDE_LENGTH_DIMENSION, h=lock_pin_prismoid_inner_length);
translate([0, 0, lock_pin_prismoid_inner_length]) {
prismoid(size1=LOCKPIN_HOLE_SIDE_LENGTH_DIMENSION, size2=lock_pin_outer_dimension, h=lock_pin_prismoid_outer_length);
prismoid(size1=LOCKPIN_HOLE_SIDE_LENGTH_DIMENSION, size2=lock_pin_outer_dimension, h=lock_pin_prismoid_outer_length + EPSILON);
}
}
}
Expand Down Expand Up @@ -203,15 +204,15 @@ module connectorArmOuter(is_foot=false) {
difference() {
color(HR_YELLOW) cuboid(arm_dimensions_outer, chamfer=BASE_CHAMFER,except=BOTTOM);
if(!is_foot){
color(HR_RED) rotate([90, 0, 0]) cuboid([LOCKPIN_HOLE_SIDE_LENGTH, LOCKPIN_HOLE_SIDE_LENGTH, connector_outer_side_length], chamfer=-LOCKPIN_HOLE_CHAMFER);
color(HR_RED) rotate([90, 0, 90]) cuboid([LOCKPIN_HOLE_SIDE_LENGTH, LOCKPIN_HOLE_SIDE_LENGTH, connector_outer_side_length], chamfer=-LOCKPIN_HOLE_CHAMFER);
color(HR_RED) rotate([90, 0, 0]) cuboid([LOCKPIN_HOLE_SIDE_LENGTH, LOCKPIN_HOLE_SIDE_LENGTH, connector_outer_side_length + EPSILON], chamfer=-LOCKPIN_HOLE_CHAMFER);
color(HR_RED) rotate([90, 0, 90]) cuboid([LOCKPIN_HOLE_SIDE_LENGTH, LOCKPIN_HOLE_SIDE_LENGTH, connector_outer_side_length + EPSILON], chamfer=-LOCKPIN_HOLE_CHAMFER);
}
}
}

module connectorArmInner() {

arm_dimensions_inner = [arm_side_length_inner, arm_side_length_inner, BASE_UNIT];
arm_dimensions_inner = [arm_side_length_inner, arm_side_length_inner, BASE_UNIT + EPSILON];
color(HR_GREEN)
cuboid(arm_dimensions_inner, chamfer=BASE_CHAMFER,edges=BOTTOM);
}
Expand Down Expand Up @@ -373,7 +374,7 @@ module tension_hole_half(){
lockpin_tension_angle = 86.5;
lockpin_tension_hole_width_inner = PRINTING_LAYER_WIDTH * 4;
lockpin_tension_hole_height = BASE_UNIT / 2;
lockpin_tension_hole_inner_dimension = [lockpin_tension_hole_width_inner, lockpin_height];
lockpin_tension_hole_inner_dimension = [lockpin_tension_hole_width_inner, lockpin_height + EPSILON ];
prismoid(size1=lockpin_tension_hole_inner_dimension, height=lockpin_tension_hole_height, xang=lockpin_tension_angle, yang=90);
}

Expand Down
11 changes: 6 additions & 5 deletions models/core/makerworld/support.scad
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Original file line number Diff line number Diff line change
Expand Up @@ -20,6 +20,7 @@ x_holes = false;
support(units=units, x_holes=x_holes);

/* [Hidden] */
EPSILON = $preview ? 0.01 : 0.00001;
TOLERANCE = 0.2;
PRINTING_LAYER_WIDTH = 0.4;
PRINTING_LAYER_HEIGHT = 0.2;
Expand Down Expand Up @@ -87,7 +88,7 @@ module lock_pin_hole() {
union() {
prismoid(size1=lock_pin_center_dimension, size2=LOCKPIN_HOLE_SIDE_LENGTH_DIMENSION, h=lock_pin_prismoid_inner_length);
translate([0, 0, lock_pin_prismoid_inner_length]) {
prismoid(size1=LOCKPIN_HOLE_SIDE_LENGTH_DIMENSION, size2=lock_pin_outer_dimension, h=lock_pin_prismoid_outer_length);
prismoid(size1=LOCKPIN_HOLE_SIDE_LENGTH_DIMENSION, size2=lock_pin_outer_dimension, h=lock_pin_prismoid_outer_length + EPSILON);
}
}
}
Expand Down Expand Up @@ -205,15 +206,15 @@ module connectorArmOuter(is_foot=false) {
difference() {
color(HR_YELLOW) cuboid(arm_dimensions_outer, chamfer=BASE_CHAMFER,except=BOTTOM);
if(!is_foot){
color(HR_RED) rotate([90, 0, 0]) cuboid([LOCKPIN_HOLE_SIDE_LENGTH, LOCKPIN_HOLE_SIDE_LENGTH, connector_outer_side_length], chamfer=-LOCKPIN_HOLE_CHAMFER);
color(HR_RED) rotate([90, 0, 90]) cuboid([LOCKPIN_HOLE_SIDE_LENGTH, LOCKPIN_HOLE_SIDE_LENGTH, connector_outer_side_length], chamfer=-LOCKPIN_HOLE_CHAMFER);
color(HR_RED) rotate([90, 0, 0]) cuboid([LOCKPIN_HOLE_SIDE_LENGTH, LOCKPIN_HOLE_SIDE_LENGTH, connector_outer_side_length + EPSILON], chamfer=-LOCKPIN_HOLE_CHAMFER);
color(HR_RED) rotate([90, 0, 90]) cuboid([LOCKPIN_HOLE_SIDE_LENGTH, LOCKPIN_HOLE_SIDE_LENGTH, connector_outer_side_length + EPSILON], chamfer=-LOCKPIN_HOLE_CHAMFER);
}
}
}

module connectorArmInner() {

arm_dimensions_inner = [arm_side_length_inner, arm_side_length_inner, BASE_UNIT];
arm_dimensions_inner = [arm_side_length_inner, arm_side_length_inner, BASE_UNIT + EPSILON];
color(HR_GREEN)
cuboid(arm_dimensions_inner, chamfer=BASE_CHAMFER,edges=BOTTOM);
}
Expand Down Expand Up @@ -375,7 +376,7 @@ module tension_hole_half(){
lockpin_tension_angle = 86.5;
lockpin_tension_hole_width_inner = PRINTING_LAYER_WIDTH * 4;
lockpin_tension_hole_height = BASE_UNIT / 2;
lockpin_tension_hole_inner_dimension = [lockpin_tension_hole_width_inner, lockpin_height];
lockpin_tension_hole_inner_dimension = [lockpin_tension_hole_width_inner, lockpin_height + EPSILON ];
prismoid(size1=lockpin_tension_hole_inner_dimension, height=lockpin_tension_hole_height, xang=lockpin_tension_angle, yang=90);
}

Expand Down