nhf/touhou/houjuu_nue/__init__.py

@@ -88,8 +88,8 @@ class Parameters(Model):
     hs_joint_axis_cbore_depth: float = 3
 
     wing_profile: MW.WingProfile = field(default_factory=lambda: MW.WingProfile(
-        shoulder_height = 100,
-        elbow_height = 120,
+        shoulder_height = 80,
+        elbow_height = 100,
     ))
 
     # Exterior radius of the wing root assembly
@@ -115,7 +115,6 @@ class Parameters(Model):
     joint.
     """
     wing_s0_thickness: float = 40
-    wing_s0_height: float = 100
 
     # Length of the spacer
     wing_s1_thickness: float = 20
@@ -312,7 +311,7 @@ class Parameters(Model):
             shoulder_attach_dist=self.shoulder_attach_dist,
             shoulder_attach_diam=self.shoulder_attach_diam,
             wall_thickness=self.wing_root_wall_thickness,
-            conn_height=self.wing_s0_height,
+            conn_height=self.wing_profile.shoulder_height,
             conn_thickness=self.wing_s0_thickness,
         )
 
@@ -359,7 +358,7 @@ class Parameters(Model):
         of the shoulder joint.
         """
         joint = self.shoulder_torsion_joint
-        return self.wing_s0_height - 2 * joint.total_height + 2 * joint.rider_disk_height
+        return self.wing_profile.shoulder_height - 2 * joint.total_height + 2 * joint.rider_disk_height
 
     @target(name="shoulder_joint_child")
     def shoulder_joint_child(self) -> Cq.Assembly:
@@ -369,7 +368,7 @@ class Parameters(Model):
 
         joint = self.shoulder_torsion_joint
         # Half of the height of the bridging cylinder
-        dh = self.wing_s0_height / 2 - joint.total_height
+        dh = self.wing_profile.shoulder_height / 2 - joint.total_height
         core_start_angle = 30
         core_end_angle1 = 90
         core_end_angle2 = 180
@@ -525,7 +524,7 @@ class Parameters(Model):
 
     @target(name="wing/r1s1", kind=TargetKind.DXF)
     def wing_r1s1_profile(self) -> Cq.Sketch:
-        return self.wing_profile.wing_r1s1_profile()
+        return self.wing_profile.wing_r1_profile()
 
     def wing_r1s1_panel(self, front=True) -> Cq.Workplane:
         profile = self.wing_r1s1_profile()

nhf/touhou/houjuu_nue/wing.py

@@ -234,7 +234,101 @@ def wing_root(joint: HirthJoint,
 class WingProfile:
 
     shoulder_height: float = 100
+
     elbow_height: float = 120
+    elbow_x: float = 270
+    elbow_y: float = 10
+    # Angle of elbow w.r.t. y axis
+    elbow_angle: float = -20
+
+    wrist_height: float = 70
+    # Bottom point of the wrist
+    wrist_x: float = 400
+    wrist_y: float = 200
+
+    # Angle of wrist w.r.t. y axis. should be negative
+    wrist_angle: float = -40
+
+    # Extends from the wrist to the tip of the arrow
+    arrow_height: float = 300
+    arrow_angle: float = 7
+
+    # Relative (in wrist coordinate) centre of the ring
+    ring_x: float = 40
+    ring_y: float = 20
+    ring_radius_inner: float = 22
+
+    def __post_init__(self):
+        assert self.ring_radius > self.ring_radius_inner
+
+    @property
+    def ring_radius(self) -> float:
+        dx = self.ring_x
+        dy = self.ring_y
+        return (dx * dx + dy * dy) ** 0.5
+
+    def wing_r1_profile(self) -> Cq.Sketch:
+        wrist_theta = math.radians(self.wrist_angle)
+        wrist_s = math.sin(wrist_theta)
+        wrist_c = math.cos(wrist_theta)
+        wrist_top_x = self.wrist_x + self.wrist_height * wrist_s
+        wrist_top_y = self.wrist_y + self.wrist_height * wrist_c
+        elbow_theta = math.radians(self.elbow_angle)
+        elbow_top_x = self.elbow_x + self.elbow_height * math.sin(elbow_theta)
+        elbow_top_y = self.elbow_y + self.elbow_height * math.cos(elbow_theta)
+        result = (
+            Cq.Sketch()
+            .segment(
+                (0, 0),
+                (0, self.shoulder_height),
+                tag="shoulder")
+            .arc(
+                (0, self.shoulder_height),
+                (elbow_top_x, elbow_top_y),
+                (wrist_top_x, wrist_top_y),
+                tag="s1_top")
+            #.segment(
+            #    (self.wrist_x, self.wrist_y),
+            #    (wrist_top_x, wrist_top_y),
+            #    tag="wrist")
+            .arc(
+                (0, 0),
+                (self.elbow_x, self.elbow_y),
+                (self.wrist_x, self.wrist_y),
+                tag="s1_bot")
+        )
+        arrow_theta = math.radians(self.arrow_angle)
+        arrow_x = self.wrist_x - self.arrow_height * wrist_s
+        arrow_y = self.wrist_y - self.arrow_height * wrist_c
+        arrow_tip_x = arrow_x + (self.arrow_height + self.wrist_height) * math.sin(arrow_theta + wrist_theta)
+        arrow_tip_y = arrow_y + (self.arrow_height + self.wrist_height) * math.cos(arrow_theta + wrist_theta)
+        result = (
+            result
+            .segment(
+                (self.wrist_x, self.wrist_y),
+                (arrow_x, arrow_y)
+            )
+            .segment(
+                (arrow_x, arrow_y),
+                (arrow_tip_x, arrow_tip_y)
+            )
+            .segment(
+                (arrow_tip_x, arrow_tip_y),
+                (wrist_top_x, wrist_top_y)
+            )
+        )
+        # Carve out the ring
+        result = result.assemble()
+        ring_x = wrist_top_x + wrist_c * self.ring_x + wrist_s * self.ring_y
+        ring_y = wrist_top_y - wrist_s * self.ring_x + wrist_c * self.ring_y
+        result = (
+            result
+            .push([(ring_x, ring_y)])
+            .circle(self.ring_radius, mode='a')
+            .circle(self.ring_radius_inner, mode='s')
+            .clean()
+        )
+        return result
 
     def wing_r1s1_profile(self) -> Cq.Sketch:
         """