import bpy import bmesh import math import random # ------------------------------------------------------------------ # Clean up any default mesh objects so only the specimen remains # ------------------------------------------------------------------ for _o in list(bpy.data.objects): if _o.type == 'MESH': try: bpy.data.objects.remove(_o, do_unlink=True) except Exception: pass random.seed(7) R = 1.0 # cap radius TAU = math.pi * 2.0 # ------------------------------------------------------------------ # Helpers # ------------------------------------------------------------------ def make_mat(name, color, rough=0.55, sss=0.0): mat = bpy.data.materials.new(name) mat.use_nodes = True bsdf = mat.node_tree.nodes.get("Principled BSDF") if bsdf: try: bsdf.inputs["Base Color"].default_value = color except Exception: pass try: bsdf.inputs["Roughness"].default_value = rough except Exception: pass if sss > 0.0: for sname in ("Subsurface Weight", "Subsurface"): try: bsdf.inputs[sname].default_value = sss break except Exception: continue for cname in ("Subsurface Color",): try: bsdf.inputs[cname].default_value = color except Exception: pass return mat def bm_to_obj(bm, name, smooth=True): me = bpy.data.meshes.new(name) bm.normal_update() bm.to_mesh(me) bm.free() obj = bpy.data.objects.new(name, me) bpy.context.collection.objects.link(obj) if smooth: for p in obj.data.polygons: p.use_smooth = True return obj def spin_profile(pts, name, steps=72, smooth=True): bm = bmesh.new() verts = [bm.verts.new((p[0], 0.0, p[1])) for p in pts] for i in range(len(verts) - 1): bm.edges.new((verts[i], verts[i + 1])) geom = bm.verts[:] + bm.edges[:] bmesh.ops.spin(bm, geom=geom, cent=(0.0, 0.0, 0.0), axis=(0.0, 0.0, 1.0), dvec=(0.0, 0.0, 0.0), angle=TAU, steps=steps, use_duplicate=False) bmesh.ops.remove_doubles(bm, verts=bm.verts, dist=1e-4) bmesh.ops.recalc_face_normals(bm, faces=bm.faces) return bm_to_obj(bm, name, smooth) def apply_mods(obj): bpy.ops.object.select_all(action='DESELECT') obj.select_set(True) bpy.context.view_layer.objects.active = obj for m in list(obj.modifiers): try: bpy.ops.object.modifier_apply(modifier=m.name) except Exception: pass def cap_top_z(rn): rn = min(max(rn, 0.0), 1.0) return 0.62 + 0.45 * (1.0 - rn * rn) ** 0.7 def cap_under_z(r): return 0.60 + 0.06 * (1.0 - r / R) # ------------------------------------------------------------------ # Materials # ------------------------------------------------------------------ mat_cap = make_mat("CapRed", (0.72, 0.04, 0.02, 1.0), rough=0.42, sss=0.12) mat_veil = make_mat("Veil", (0.95, 0.93, 0.87, 1.0), rough=0.6, sss=0.05) mat_stem = make_mat("Stem", (0.96, 0.94, 0.88, 1.0), rough=0.6, sss=0.15) mat_gill = make_mat("Gills", (0.93, 0.90, 0.81, 1.0), rough=0.65, sss=0.1) mat_ring = make_mat("Ring", (0.95, 0.93, 0.86, 1.0), rough=0.6, sss=0.05) # ------------------------------------------------------------------ # CAP (pileus) - solid dome with rim, built by lathe # ------------------------------------------------------------------ top = [] NT = 28 for i in range(NT + 1): rn = i / NT top.append((rn * R, cap_top_z(rn))) under = [] NU = 16 for i in range(NU + 1): r = R * (1.0 - i / NU) # R -> 0 under.append((r, cap_under_z(r))) cap_profile = top + under cap = spin_profile(cap_profile, "Cap", steps=80) cap.data.materials.append(mat_cap) # ------------------------------------------------------------------ # GILLS (lamellae) - radial plates under the cap # ------------------------------------------------------------------ def build_gills(): bm = bmesh.new() NG = 74 r_in = 0.17 r_out = 0.95 * R for i in range(NG): a = TAU * i / NG ca, sa = math.cos(a), math.sin(a) zui = cap_under_z(r_in) zuo = cap_under_z(r_out) dep_in = 0.06 * (1.0 - r_in / R) + 0.02 dep_out = 0.06 * (1.0 - r_out / R) + 0.015 v1 = bm.verts.new((r_in * ca, r_in * sa, zui)) v2 = bm.verts.new((r_out * ca, r_out * sa, zuo)) v3 = bm.verts.new((r_out * ca, r_out * sa, zuo - dep_out)) v4 = bm.verts.new((r_in * ca, r_in * sa, zui - dep_in)) bm.faces.new((v1, v2, v3, v4)) bmesh.ops.recalc_face_normals(bm, faces=bm.faces) return bm_to_obj(bm, "Gills", smooth=False) gills = build_gills() gills.data.materials.append(mat_gill) _m = gills.modifiers.new("Solidify", 'SOLIDIFY') _m.thickness = 0.007 _m.offset = 0.0 apply_mods(gills) # ------------------------------------------------------------------ # STEM (stipe) with bulbous base # ------------------------------------------------------------------ stem_profile = [ (0.0, -0.03), (0.20, -0.03), (0.30, 0.00), (0.335, 0.10), (0.30, 0.20), (0.235, 0.32), (0.185, 0.46), (0.165, 0.58), (0.150, 0.66), (0.135, 0.72), (0.0, 0.72), ] stem = spin_profile(stem_profile, "Stem", steps=64) stem.data.materials.append(mat_stem) # ------------------------------------------------------------------ # RING (annulus) - hanging skirt near top of stem # ------------------------------------------------------------------ ring_profile = [ (0.158, 0.55), (0.205, 0.535), (0.255, 0.485), (0.280, 0.415), (0.272, 0.395), ] ring = spin_profile(ring_profile, "Ring", steps=64) ring.data.materials.append(mat_ring) _mr = ring.modifiers.new("Solidify", 'SOLIDIFY') _mr.thickness = 0.01 _mr.offset = 0.0 apply_mods(ring) # ------------------------------------------------------------------ # UNIVERSAL VEIL REMNANTS: warts on cap + volva scales on the bulb # ------------------------------------------------------------------ veil_objs = [] # White warts scattered over the cap for _ in range(48): rn = random.uniform(0.04, 0.9) r = rn * R ang = random.uniform(0.0, TAU) x = r * math.cos(ang) y = r * math.sin(ang) z = cap_top_z(rn) s = random.uniform(0.035, 0.06) * (1.1 - 0.5 * rn) bpy.ops.mesh.primitive_ico_sphere_add(subdivisions=1, radius=s, location=(x, y, z - s * 0.25)) w = bpy.context.active_object if w is not None: w.scale = (1.0, 1.0, 0.45) veil_objs.append(w) # Volva scales in concentric rings around the bulb base bulb_rings = [(0.02, 0.30, 14), (0.08, 0.335, 15), (0.15, 0.285, 13), (0.21, 0.225, 11)] for zc, rr, n in bulb_rings: off = random.uniform(0.0, TAU) for k in range(n): ang = TAU * k / n + off x = rr * math.cos(ang) y = rr * math.sin(ang) s = random.uniform(0.022, 0.038) bpy.ops.mesh.primitive_ico_sphere_add(subdivisions=1, radius=s, location=(x, y, zc)) w = bpy.context.active_object if w is not None: nx, ny = math.cos(ang), math.sin(ang) w.rotation_euler = (0.0, 0.0, ang) w.scale = (0.6, 1.0, 0.9) veil_objs.append(w) veil = None if veil_objs: bpy.ops.object.select_all(action='DESELECT') for o in veil_objs: o.select_set(True) bpy.context.view_layer.objects.active = veil_objs[0] try: bpy.ops.object.join() except Exception: pass veil = bpy.context.active_object if veil is not None: veil.name = "VeilRemnants" veil.data.materials.append(mat_veil) for p in veil.data.polygons: p.use_smooth = True # ------------------------------------------------------------------ # Group all parts of the single specimen under one empty # ------------------------------------------------------------------ parts = [cap, gills, stem, ring] if veil is not None: parts.append(veil) root = bpy.data.objects.new("Amanita_muscaria", None) bpy.context.collection.objects.link(root) for o in parts: if o is not None: o.parent = root bpy.ops.object.select_all(action='DESELECT')