updates

2026-10-02 12:23:58 -04:00
parent f0af1dbbcb
commit ad1e7e6d01
219 changed files with 488314 additions and 0 deletions
@@ -0,0 +1,101 @@
+"""Grid-export prototype STLs for chair_camera_pod.scad (0.4 mm pitch)."""
+
+from pathlib import Path
+import struct
+
+import numpy as np
+
+HERE = Path(__file__).resolve().parent
+STEP = 0.4
+
+
+def grid(lo, hi):
+    axes = [np.arange(a,b,STEP,dtype=np.float32)+STEP/2 for a,b in zip(lo,hi)]
+    return np.meshgrid(*axes,indexing="ij",sparse=True)
+
+
+def box(X,Y,Z,x0,x1,y0,y1,z0,z1):
+    return ((X>=x0)&(X<x1)&(Y>=y0)&(Y<y1)&(Z>=z0)&(Z<z1))
+
+
+def disk(X,Y,Z,x,y,r,z0,z1):
+    return ((X-x)**2+(Y-y)**2<=r*r)&(Z>=z0)&(Z<z1)
+
+
+def xslot(X,Y,Z,a,b,y,r,z0,z1):
+    return (box(X,Y,Z,min(a,b),max(a,b),y-r,y+r,z0,z1)
+            |disk(X,Y,Z,a,y,r,z0,z1)|disk(X,Y,Z,b,y,r,z0,z1))
+
+
+def yslot(X,Y,Z,x,a,b,r,z0,z1):
+    return (box(X,Y,Z,x-r,x+r,min(a,b),max(a,b),z0,z1)
+            |disk(X,Y,Z,x,a,r,z0,z1)|disk(X,Y,Z,x,b,r,z0,z1))
+
+
+def tray():
+    lo,hi=(-39,-27,0),(39,27,14)
+    X,Y,Z=grid(lo,hi)
+    solid=box(X,Y,Z,-27,27,-27,27,0,3)
+    solid|=box(X,Y,Z,-27,-24,-27,27,3,13)
+    solid|=box(X,Y,Z,24,27,-27,27,3,13)
+    solid|=box(X,Y,Z,-27,27,24,27,3,13)
+    solid|=box(X,Y,Z,-39,-26,-18,18,0,4)
+    solid|=box(X,Y,Z,26,39,-18,18,0,4)
+    for x in (-17,17):
+        for y in (-17,17): solid|=disk(X,Y,Z,x,y,3.5,3,6)
+    for x in (-17,17):
+        for y in (-17,17): solid&=~xslot(X,Y,Z,x-2,x+2,y,1.5,-1,9)
+    for x in (-33,33): solid&=~yslot(X,Y,Z,x,-11,11,2.5,-1,6)
+    for x in (-25.5,25.5):
+        for y in (-23,23): solid&=~disk(X,Y,Z,x,y,0.8,5,14)
+    return solid,lo
+
+
+def cover():
+    lo,hi=(-27,-27,0),(27,27,2.4)
+    X,Y,Z=grid(lo,hi)
+    solid=box(X,Y,Z,-27,27,-27,27,0,2.4)
+    solid&=~disk(X,Y,Z,0,6,9,-1,4)
+    for x in (-15.5,15.5):solid&=~yslot(X,Y,Z,x,0,11,3.5,-1,4)
+    for x in (-25.5,25.5):
+        for y in (-23,23):solid&=~disk(X,Y,Z,x,y,1.2,-1,4)
+    return solid,lo
+
+
+def write_stl(path,solid,lo):
+    exposed=[]
+    for axis in range(3):
+        for sign in (-1,1):
+            neighbor=np.roll(solid,-sign,axis=axis)
+            face=solid&~neighbor
+            edge=[slice(None)]*3;edge[axis]=0 if sign==-1 else -1
+            face[tuple(edge)]=solid[tuple(edge)]
+            exposed.append((axis,sign,np.argwhere(face)))
+    facets=sum(2*len(v) for _,_,v in exposed)
+    with path.open("wb") as out:
+        out.write(b"Freddy concealed chair pod prototype".ljust(80,b"\0"))
+        out.write(struct.pack("<I",facets))
+        for axis,sign,points in exposed:
+            normal=[0.,0.,0.];normal[axis]=float(sign)
+            for i,j,k in points:
+                x0,y0,z0=(lo[0]+i*STEP,lo[1]+j*STEP,lo[2]+k*STEP)
+                x1,y1,z1=x0+STEP,y0+STEP,z0+STEP
+                if axis==0:
+                    x=x1 if sign==1 else x0
+                    quad=[(x,y0,z0),(x,y1,z0),(x,y1,z1),(x,y0,z1)]
+                elif axis==1:
+                    y=y1 if sign==1 else y0
+                    quad=[(x0,y,z0),(x0,y,z1),(x1,y,z1),(x1,y,z0)]
+                else:
+                    z=z1 if sign==1 else z0
+                    quad=[(x0,y0,z),(x1,y0,z),(x1,y1,z),(x0,y1,z)]
+                if sign==-1:quad.reverse()
+                for a,b,c in ((0,1,2),(0,2,3)):
+                    out.write(struct.pack("<12fH",*normal,*quad[a],*quad[b],*quad[c],0))
+    print(path.name,facets,"facets",round(path.stat().st_size/1e6,1),"MB")
+
+
+if __name__=="__main__":
+    for name,build in (("chair_camera_tray_draft.stl",tray),
+                       ("chair_camera_cover_draft.stl",cover)):
+        solid,lo=build();write_stl(HERE/name,solid,lo)