Lasse Lian
6df69e9def
Thin Extrude builds walls of a set thickness along sketch curves, open chains and closed loops, with the wall centred, inside, outside or on both sides at two thicknesses. Saved under format 20 (thin on an Extrude); an extrude without thin saves as before. Closes #721.
150 lines
2.5 KiB
JSON
150 lines
2.5 KiB
JSON
{
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"id": "82-thin-extrude-frame",
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"name": "Thin extrude frame",
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"description": "40x40 square of lines centred on origin; a thin wall 3 mm inside and 1 mm outside the lines, extruded 10 mm.",
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"exercises": [
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"extrude",
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"thin"
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],
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"units": {
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"length": "mm",
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"angle": "deg",
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"area": "mm2",
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"volume": "mm3"
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},
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"conventions": {
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"world": "right-handed; Z up. XY/XZ/YZ are the origin planes.",
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"sketch_frame": "sketch-local 2D coords; world = plane.origin + x*plane.x_dir + y*plane.y_dir (origin in mm). Profile 'loops' list sketch entity ids.",
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"point_refs": "'<id>.start' / '<id>.end' / '<id>.center' reuse (share) that existing sketch point; 'at' is its position when referenced.",
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"extrude_direction": "positive = along sketch plane normal unless stated",
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"selections": "selected faces/edges carry 'point': a world-space point on the face / the edge's parametric midpoint; pick the nearest face/edge to it."
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},
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"parameters": [],
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"features": [
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{
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"op": "sketch",
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"name": "Sketch1",
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"plane": {
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"ref": "XY",
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"origin": [
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0.0,
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0.0,
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0.0
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],
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"x_dir": [
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1.0,
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0.0,
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0.0
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],
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"y_dir": [
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0.0,
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1.0,
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0.0
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],
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"normal": [
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0.0,
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0.0,
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1.0
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]
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},
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"entities": [
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{
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"type": "line",
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"start": {
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"at": [
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-20,
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-20
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]
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},
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"end": {
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"at": [
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20,
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-20
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]
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},
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"id": "l1"
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},
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{
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"type": "line",
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"start": {
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"ref": "l1.end",
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"at": [
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20.0,
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-20.0
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]
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},
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"end": {
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"at": [
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20,
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20
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]
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},
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"id": "l2"
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},
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{
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"type": "line",
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"start": {
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"ref": "l2.end",
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"at": [
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20.0,
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20.0
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]
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},
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"end": {
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"at": [
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-20,
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20
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]
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},
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"id": "l3"
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},
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{
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"type": "line",
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"start": {
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"ref": "l3.end",
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"at": [
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-20.0,
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20.0
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]
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},
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"end": {
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"ref": "l1.start",
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"at": [
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-20.0,
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-20.0
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]
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},
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"id": "l4"
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}
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],
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"constraints": [],
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"dimensions": []
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},
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{
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"op": "extrude",
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"name": "Frame",
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"operation": "new",
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"extent": {
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"type": "distance",
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"distance": 10,
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"direction": "positive"
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},
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"result_bodies": [
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"Frame"
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],
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"thin": {
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"sketch": "Sketch1",
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"curves": [
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"l1",
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"l2",
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"l3",
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"l4"
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],
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"thickness": 3,
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"side": "two_sides",
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"thickness2": 1
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}
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}
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]
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}
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