"""UH-60-style utility helicopter. Clean deterministic Blender 5.2 build. Run: blender -b --python-exit-code 1 --python build_blackhawk-helicopter.py Optional -- --preflight exercises GPU bake/export/reimport; -- --draft uses small renders. Scope: hero/front, orthographic port, clay, six paints; 60-140k triangles, 8 materials max, 1024 colour/normal and 512 ORM max, 12MB GLB. Revision cap 3. CC0 source textures are downloaded into a task cache, all shader detail Cycles-baked. """ import bpy, bmesh, math, os, sys, json, struct, urllib.request, random, time from mathutils import Vector, Matrix from pathlib import Path import numpy as np import hashlib BUILD_SOURCE_SHA256=hashlib.sha256(Path(__file__).read_bytes()).hexdigest() ROOT=Path(__file__).resolve().parent CACHE=ROOT/'textures'; CACHE.mkdir(exist_ok=True) random.seed(60) START=time.time() DRAFT='--draft' in sys.argv bpy.ops.object.select_all(action='SELECT'); bpy.ops.object.delete(use_global=False) for dat in list(bpy.data.materials): bpy.data.materials.remove(dat) sc=bpy.context.scene sc.unit_settings.system='METRIC'; sc.unit_settings.scale_length=1 sc.render.engine='CYCLES'; sc.cycles.samples=24; sc.cycles.use_denoising=True prefs=bpy.context.preferences.addons['cycles'].preferences for backend in ('OPTIX','CUDA'): try: prefs.compute_device_type=backend; prefs.get_devices() if any(d.type!='CPU' for d in prefs.devices): break except Exception: pass for d in prefs.devices: d.use=d.type!='CPU' sc.cycles.device='GPU' print('GPU',[(d.name,d.type,d.use) for d in prefs.devices],flush=True) sc.render.image_settings.file_format='PNG' sc.view_settings.view_transform='AgX' sc.render.bake.margin=8 def active(o): bpy.ops.object.select_all(action='DESELECT'); o.select_set(True); bpy.context.view_layer.objects.active=o def source(asset,mp): p=CACHE/f'{asset}_{mp}_1k.jpg' if not p.exists(): url=f'https://dl.polyhaven.org/file/ph-assets/Textures/jpg/1k/{asset}/{asset}_{mp}_1k.jpg' urllib.request.urlretrieve(url,p) im=bpy.data.images.load(str(p),check_existing=True) if mp!='diff': im.colorspace_settings.name='Non-Color' return im # Tiny real GPU bake/export/import before any full pipeline execution. if '--preflight' in sys.argv: bpy.ops.mesh.primitive_plane_add(); o=bpy.context.object m=bpy.data.materials.new('probe');m.use_nodes=True;o.data.materials.append(m) im=bpy.data.images.new('probe',32,32); n=m.node_tree.nodes.new('ShaderNodeTexImage');n.image=im;m.node_tree.nodes.active=n sc.cycles.samples=1;bpy.ops.object.bake(type='DIFFUSE',pass_filter={'COLOR'}) bpy.ops.export_scene.gltf(filepath='/tmp/blackhawk-probe.glb',export_format='GLB',use_selection=True) bpy.ops.object.delete();bpy.ops.import_scene.gltf(filepath='/tmp/blackhawk-probe.glb') assert any(o.type=='MESH' for o in sc.objects) print('PREFLIGHT_OK');sys.exit(0) MATS={};FACTORS={} def baked_material(name,asset,color,rough,metal=0,scale=1,normal_strength=.15): """Bake a seamless shared material tile: photo + procedural wear, actual Cycles passes.""" mat=bpy.data.materials.new(name);mat.use_nodes=True nt=mat.node_tree;nt.nodes.clear();ns=nt.nodes;lk=nt.links out=ns.new('ShaderNodeOutputMaterial');bs=ns.new('ShaderNodeBsdfPrincipled');lk.new(bs.outputs['BSDF'],out.inputs['Surface']) uv=ns.new('ShaderNodeTexCoord') tex=ns.new('ShaderNodeTexImage');tex.image=source(asset,'diff');lk.new(uv.outputs['UV'],tex.inputs['Vector']) bw=ns.new('ShaderNodeRGBToBW');lk.new(tex.outputs['Color'],bw.inputs[0]) ramp=ns.new('ShaderNodeValToRGB') if name=='Paint': ramp.color_ramp.elements[0].position=.08;ramp.color_ramp.elements[0].color=(.62,.62,.62,1) ramp.color_ramp.elements[1].position=.65;ramp.color_ramp.elements[1].color=(.97,.97,.97,1) else: ramp.color_ramp.elements[0].color=tuple(c*.65 for c in color)+(1,) ramp.color_ramp.elements[1].color=tuple(min(1,c*1.3) for c in color)+(1,) lk.new(bw.outputs[0],ramp.inputs[0]) noise=ns.new('ShaderNodeTexNoise');noise.inputs['Scale'].default_value=38;noise.inputs['Detail'].default_value=3 lk.new(uv.outputs['UV'],noise.inputs['Vector']) mix=ns.new('ShaderNodeMixRGB');mix.blend_type='MULTIPLY';mix.inputs[0].default_value=.13 lk.new(ramp.outputs['Color'],mix.inputs[1]);lk.new(noise.outputs['Fac'],mix.inputs[2]);lk.new(mix.outputs[0],bs.inputs['Base Color']) if name=='Paint': broad=ns.new('ShaderNodeTexNoise');broad.inputs['Scale'].default_value=5.5;broad.inputs['Detail'].default_value=4;lk.new(uv.outputs['UV'],broad.inputs['Vector']) grime=ns.new('ShaderNodeValToRGB');grime.color_ramp.elements[0].position=.23;grime.color_ramp.elements[0].color=(.40,.40,.40,1);grime.color_ramp.elements[1].position=.72;grime.color_ramp.elements[1].color=(1,1,1,1);lk.new(broad.outputs['Fac'],grime.inputs[0]) vm=ns.new('ShaderNodeVectorMath');vm.operation='MULTIPLY';vm.inputs[1].default_value=(90,3,1);lk.new(uv.outputs['UV'],vm.inputs[0]) rain=ns.new('ShaderNodeTexNoise');rain.inputs['Scale'].default_value=1;rain.inputs['Detail'].default_value=2;lk.new(vm.outputs[0],rain.inputs['Vector']) weather=ns.new('ShaderNodeMixRGB');weather.blend_type='MULTIPLY';weather.inputs[0].default_value=.65;lk.new(mix.outputs[0],weather.inputs[1]);lk.new(grime.outputs[0],weather.inputs[2]) streak=ns.new('ShaderNodeMixRGB');streak.blend_type='MULTIPLY';streak.inputs[0].default_value=.22;lk.new(weather.outputs[0],streak.inputs[1]);lk.new(rain.outputs['Fac'],streak.inputs[2]);lk.new(streak.outputs[0],bs.inputs['Base Color']) nor=ns.new('ShaderNodeTexImage');nor.image=source(asset,'nor_gl');lk.new(uv.outputs['UV'],nor.inputs['Vector']) norm=ns.new('ShaderNodeNormalMap');norm.inputs['Strength'].default_value=normal_strength;lk.new(nor.outputs['Color'],norm.inputs['Color']);lk.new(norm.outputs[0],bs.inputs['Normal']) arm=ns.new('ShaderNodeTexImage');arm.image=source(asset,'arm');lk.new(uv.outputs['UV'],arm.inputs['Vector']) sep=ns.new('ShaderNodeSeparateColor');lk.new(arm.outputs['Color'],sep.inputs['Color']) mr=ns.new('ShaderNodeMapRange');mr.inputs['To Min'].default_value=max(.08,rough-.12);mr.inputs['To Max'].default_value=min(.96,rough+.12);lk.new(sep.outputs['Green'],mr.inputs['Value']);lk.new(mr.outputs[0],bs.inputs['Roughness']) bs.inputs['Metallic'].default_value=metal bpy.ops.mesh.primitive_plane_add(size=2,location=(0,0,-30));tile=bpy.context.object;tile.data.materials.append(mat) target=ns.new('ShaderNodeTexImage') baked={} texres=1024 if name in ('Paint','Metal') else (128 if name in ('Glass','Lamps') else 512) for kind,res in [('base',texres),('normal',texres),('orm',min(512,texres))]: im=bpy.data.images.new(name+'_'+kind,width=res,height=res,alpha=False) if kind!='base': im.colorspace_settings.name='Non-Color' target.image=im;ns.active=target;active(tile);sc.cycles.samples=4 if kind=='base': bpy.ops.object.bake(type='DIFFUSE',pass_filter={'COLOR'}) elif kind=='normal': bpy.ops.object.bake(type='NORMAL') else: combine=ns.new('ShaderNodeCombineColor');combine.inputs['Red'].default_value=1;combine.inputs['Blue'].default_value=metal;lk.new(mr.outputs[0],combine.inputs['Green']) em=ns.new('ShaderNodeEmission');lk.new(combine.outputs[0],em.inputs[0]);lk.new(em.outputs[0],out.inputs['Surface']) bpy.ops.object.bake(type='EMIT') im.filepath_raw=str(CACHE/(name+'_'+kind+'.png'));im.file_format='PNG';im.save();baked[kind]=im bpy.data.objects.remove(tile,do_unlink=True) nt.nodes.clear();out=ns.new('ShaderNodeOutputMaterial');bs=ns.new('ShaderNodeBsdfPrincipled');lk.new(bs.outputs[0],out.inputs[0]) bc=ns.new('ShaderNodeTexImage');bc.name='Baked Base';bc.image=baked['base'];lk.new(bc.outputs['Color'],bs.inputs['Base Color']) normal=ns.new('ShaderNodeTexImage');normal.image=baked['normal'];nm=ns.new('ShaderNodeNormalMap');lk.new(normal.outputs['Color'],nm.inputs['Color']);lk.new(nm.outputs[0],bs.inputs['Normal']) orm=ns.new('ShaderNodeTexImage');orm.image=baked['orm'];ss=ns.new('ShaderNodeSeparateColor');lk.new(orm.outputs['Color'],ss.inputs['Color']);lk.new(ss.outputs['Green'],bs.inputs['Roughness']);lk.new(ss.outputs['Blue'],bs.inputs['Metallic']) group=bpy.data.node_groups.get('glTF Material Output') if not group: group=bpy.data.node_groups.new('glTF Material Output','ShaderNodeTree');group.interface.new_socket(name='Occlusion',in_out='INPUT',socket_type='NodeSocketFloat') gn=ns.new('ShaderNodeGroup');gn.node_tree=group;lk.new(ss.outputs['Red'],gn.inputs['Occlusion']) MATS[name]=mat print('BAKED',name,flush=True) return mat Paint=baked_material('Paint','blue_metal_plate',(1,1,1),.8,0,normal_strength=.09) Metal=baked_material('Metal','metal_plate',(.19,.21,.22),.42,.78,normal_strength=.13) Rubber=baked_material('Rubber','fabric_leather_01',(.018,.021,.022),.87,0,normal_strength=.12) Interior=baked_material('Interior','fabric_leather_01',(.095,.105,.092),.86,0,normal_strength=.23) Rotor=baked_material('Rotor','blue_metal_plate',(.035,.04,.045),.65,.18,normal_strength=.07) Glass=baked_material('Glass','blue_metal_plate',(.11,.18,.21),.14,.06,normal_strength=.002) gbs=Glass.node_tree.nodes.get('Principled BSDF');gbs.inputs['Alpha'].default_value=.48;gbs.inputs['Transmission Weight'].default_value=.12;gbs.inputs['IOR'].default_value=1.45 Glass.surface_render_method='BLENDED';Glass.use_backface_culling=False Lamps=baked_material('Lamps','blue_metal_plate',(.65,.68,.57),.2,.05,normal_strength=.03) lbs=Lamps.node_tree.nodes.get('Principled BSDF');lbs.inputs['Emission Color'].default_value=(.7,.58,.38,1);lbs.inputs['Emission Strength'].default_value=.6 GROUPS={'Fuselage':[],'MainRotor':[],'TailRotor':[],'Door_L':[],'Door_R':[]} GROUP='Fuselage' def register(o,mat): o.data.materials.append(mat);GROUPS[GROUP].append(o);return o def mesh(name,verts,faces,mat=Paint,smooth=False,bevel=0): me=bpy.data.meshes.new(name);me.from_pydata(verts,[],faces);me.update() bm=bmesh.new();bm.from_mesh(me);bmesh.ops.recalc_face_normals(bm,faces=bm.faces);bm.to_mesh(me);bm.free() o=bpy.data.objects.new(name,me);sc.collection.objects.link(o);register(o,mat) for p in me.polygons:p.use_smooth=smooth if bevel: bevel_obj(o,bevel) return o def bevel_obj(o,width=.025,seg=3): active(o);m=o.modifiers.new('Machined edge radii','BEVEL');m.width=width;m.segments=seg bpy.ops.object.modifier_apply(modifier=m.name) # Weighted normals retain broad planar surfaces. if len(o.data.polygons)<12000: m=o.modifiers.new('Area weighted normals','WEIGHTED_NORMAL');m.keep_sharp=True;m.weight=35 try:bpy.ops.object.modifier_apply(modifier=m.name) except: o.modifiers.remove(m) def box(name,loc,dim,mat=Paint,bevel=.025): bpy.ops.mesh.primitive_cube_add(size=1,location=loc);o=bpy.context.object;o.name=name;o.dimensions=dim active(o);bpy.ops.object.transform_apply(location=False,rotation=False,scale=True);register(o,mat) if bevel:bevel_obj(o,bevel) return o def ellipsoid(name,loc,scale,mat=Paint,segments=32,rings=16): bpy.ops.mesh.primitive_uv_sphere_add(segments=segments,ring_count=rings,location=loc);o=bpy.context.object;o.name=name;o.scale=scale active(o);bpy.ops.object.transform_apply(location=False,rotation=False,scale=True);register(o,mat) for p in o.data.polygons:p.use_smooth=True return o def cyl(name,a,b,r,mat=Metal,vertices=20,r2=None): a,b=Vector(a),Vector(b);v=b-a bpy.ops.mesh.primitive_cone_add(vertices=vertices,radius1=r,radius2=r if r2 is None else r2,depth=v.length,location=(a+b)/2) o=bpy.context.object;o.name=name;o.rotation_euler=v.to_track_quat('Z','Y').to_euler();register(o,mat) for p in o.data.polygons:p.use_smooth=len(p.vertices)==4 bevel_obj(o,min(.012,r*.15),2);return o def tube(name,pts,r=.012,mat=Metal,cyclic=False): # Explicit tube with parallel-ish frames, robust UV and geometry export. verts=[];faces=[];N=8 for i,p in enumerate(pts): p=Vector(p);t=Vector(pts[min(i+1,len(pts)-1)])-Vector(pts[max(0,i-1)]) if t.length<1e-5:t=Vector((0,0,1)) t.normalize();ref=Vector((0,0,1)) if abs(t.z)<.9 else Vector((1,0,0));u=t.cross(ref).normalized();v=t.cross(u).normalized() verts.extend([p+r*(u*math.cos(j*2*math.pi/N)+v*math.sin(j*2*math.pi/N)) for j in range(N)]) for i in range(len(pts)-1+(1 if cyclic else 0)): k=(i+1)%len(pts) for j in range(N):faces.append((i*N+j,i*N+(j+1)%N,k*N+(j+1)%N,k*N+j)) if not cyclic:faces.extend([tuple(reversed(range(N))),tuple((len(pts)-1)*N+j for j in range(N))]) return mesh(name,verts,faces,mat,True) def panel(name,pts,mat=Paint,thick=.035,bev=.018): o=mesh(name,pts,[tuple(range(len(pts)))],mat) active(o);so=o.modifiers.new('Skin thickness','SOLIDIFY');so.thickness=thick;bpy.ops.object.modifier_apply(modifier=so.name) if bev:bevel_obj(o,bev,3) return o def window(name,pts,group=None): # True transparent aperture, gasket and structural surround. c=sum((Vector(p) for p in pts),Vector())/len(pts) inner=[c+(Vector(p)-c)*1.005 for p in pts] panel(name+' glazing',inner,Glass,.008,.008) tube(name+' rubber seal',pts,.027,Rubber,True) outer=[c+(Vector(p)-c)*1.075 for p in pts] verts=list(pts)+outer;n=len(pts) o=mesh(name+' structural frame',verts,[(i,(i+1)%n,(i+1)%n+n,i+n) for i in range(n)],Paint) active(o);so=o.modifiers.new('Frame extrusion','SOLIDIFY');so.thickness=.04;bpy.ops.object.modifier_apply(modifier=so.name);bevel_obj(o,.01,2) def loft(name,sections,mat=Paint,N=48,power=2.5,sub=1,cap_start=True): # (longitudinal y, half width, bottom, top); elliptical/superelliptic rings. vs=[];fs=[] for y,w,bot,top in sections: for j in range(N): a=j*2*math.pi/N;cx=math.cos(a);sz=math.sin(a) vs.append((w*math.copysign(abs(cx)**(2/power),cx),y,(bot+top)/2+(top-bot)/2*math.copysign(abs(sz)**(2/power),sz))) for i in range(len(sections)-1): for j in range(N):fs.append((i*N+j,i*N+(j+1)%N,(i+1)*N+(j+1)%N,(i+1)*N+j)) if cap_start:fs.append(tuple(reversed(range(N)))) fs.append(tuple((len(sections)-1)*N+j for j in range(N))) o=mesh(name,vs,fs,mat,True) if sub: active(o);m=o.modifiers.new('Smooth pressure formed skin','SUBSURF');m.levels=sub;bpy.ops.object.modifier_apply(modifier=m.name) return o # Lower nose and cabin bathtub; upper cockpit is genuinely open behind the glass. lower_hull=loft('Compound nose and lower cabin',[ (-4.40,.11,1.20,1.40),(-4.34,.34,1.04,1.63),(-4.12,.69,.91,1.80),(-3.78,.96,.82,1.98),(-3.30,1.13,.79,2.07),(-2.75,1.23,.79,1.97), (-2.15,1.27,.78,1.27),(-1.55,1.28,.78,1.05),(0,1.28,.78,1.03),(1.7,1.25,.8,1.05),(2.65,1.16,.88,1.15),(3.25,.97,1.0,1.85),(3.65,.78,1.18,2.02)],N=48,sub=2) # Compound lower cheek/footwell glazing, boolean apertures through the nose skin. for s in (-1,1): cheek=[(s*.79,-4.03,1.30),(s*1.02,-3.55,1.12),(s*1.14,-3.29,1.38),(s*.99,-3.30,1.81),(s*.80,-3.85,1.79)] # Match glazing to the compound skin before cutting its aperture. fitted=[] for x,y,z in cheek: hit,co,normal,face=lower_hull.ray_cast(Vector((s*3,y,z)),Vector((-s,0,0))) fitted.append((co.x+s*.014,y,z) if hit else (x,y,z)) cheek=fitted outer=[(x+s*.30,y,z) for x,y,z in cheek];inner=[(0,y,z) for x,y,z in cheek] cv=outer+inner;n=len(cheek);cf=[tuple(range(n)),tuple(reversed(range(n,2*n)))]+[(i,(i+1)%n,(i+1)%n+n,i+n) for i in range(n)] cutter=mesh('Temporary cheek aperture',cv,cf,Rubber) active(lower_hull);mod=lower_hull.modifiers.new('Open cheek glazing aperture','BOOLEAN');mod.operation='DIFFERENCE';mod.solver='EXACT';mod.object=cutter;bpy.ops.object.modifier_apply(modifier=mod.name) GROUPS['Fuselage'].remove(cutter);bpy.data.objects.remove(cutter,do_unlink=True) window('Lower cockpit cheek',cheek) # Centre windshield mullion and nose service hatch fitted to the curved skin. panel('Windscreen centre pillar',[(-.07,-3.64,2.00),(.07,-3.64,2.00),(.07,-2.80,3.025),(-.07,-2.80,3.025)],Paint,.045,.012) nose_outline=[] for x,y in [(-.30,-4.025),(.30,-4.025),(.46,-3.75),(-.46,-3.75)]: hit,co,normal,face=lower_hull.ray_cast(Vector((x,y,4)),Vector((0,0,-1))) if hit:nose_outline.append(co+normal*.008) if len(nose_outline)==4: fitted_outline=[] for index,start in enumerate(nose_outline): end=nose_outline[(index+1)%len(nose_outline)] for t in np.linspace(0,1,9,endpoint=False): point=start.lerp(end,float(t));hit,co,normal,face=lower_hull.ray_cast(Vector((point.x,point.y,4)),Vector((0,0,-1))) fitted_outline.append(co+normal*.008 if hit else point) tube('Nose avionics hatch seam',fitted_outline,.006,Rubber,True) for point in nose_outline:ellipsoid('Nose flush quarter turn fastener',point+Vector((0,0,.006)),(.012,.012,.006),Metal,12,6) # Rear cabin with taper joining boom. loft('Aft cabin pressure shell',[(1.95,1.23,.84,3.04),(2.03,1.23,.84,3.04),(2.7,1.15,.89,2.99),(3.35,.93,1.04,2.72),(4.0,.70,1.25,2.48),(4.4,.60,1.34,2.42)],N=48,sub=2,cap_start=False) loft('Tapered tail boom',[(3.25,.82,1.05,2.62),(3.7,.73,1.19,2.54),(4.6,.57,1.35,2.43),(6,.43,1.47,2.28),(7.5,.30,1.53,2.11),(8.65,.22,1.62,2.04),(9.35,.20,1.79,2.13),(9.65,.15,1.93,2.18)],N=40,power=2.3,sub=2) # Roof fairing independent of window openings. crown=loft('Cabin crown', [(-2.70,.83,2.87,3.04),(-2.5,1.06,2.89,3.16),(-1.6,1.17,2.91,3.19),(1.8,1.19,2.91,3.18),(2.55,1.07,2.85,3.12)],N=32,sub=2) # Cut two real roof apertures before placing brow glazing. for side in (-1,1): brow=[(side*.12,-2.79,3.045),(side*.86,-2.61,3.02),(side*.84,-2.19,3.15),(side*.14,-2.27,3.20)] cv=[(x,y,z+.18) for x,y,z in brow]+[(x,y,2.6) for x,y,z in brow] cf=[(0,1,2,3),(7,6,5,4)]+[(i,(i+1)%4,(i+1)%4+4,i+4) for i in range(4)] cutter=mesh('Temporary brow cutter',cv,cf,Rubber);active(crown) mod=crown.modifiers.new('Eyebrow aperture','BOOLEAN');mod.operation='DIFFERENCE';mod.solver='EXACT';mod.object=cutter;bpy.ops.object.modifier_apply(modifier=mod.name) GROUPS['Fuselage'].remove(cutter);bpy.data.objects.remove(cutter,do_unlink=True) # Cockpit four main glazing panes and two brow panes. for s in (-1,1): window('Windshield',[(s*.065,-3.62,2.01),(s*.98,-3.42,2.03),(s*.89,-2.61,2.93),(s*.065,-2.80,3.00)]) window('Pilot side window',[(s*1.04,-3.30,2.06),(s*1.235,-2.63,2.08),(s*1.235,-1.83,2.10),(s*1.17,-1.83,2.93),(s*.98,-2.51,2.94)]) window('Cockpit eyebrow',[(s*.12,-2.79,3.045),(s*.86,-2.61,3.02),(s*.84,-2.19,3.15),(s*.14,-2.27,3.20)]) # Sealed cockpit joints and broad roof eyebrow apertures. panel('Cockpit front brow bridge',[(s*.02,-2.82,2.98),(s*.96,-2.61,2.96),(s*.93,-2.52,3.06),(s*.02,-2.74,3.08)],Paint,.04) panel('Windshield side pillar',[(s*.96,-3.43,2.00),(s*1.065,-3.30,2.02),(s*1.00,-2.50,2.96),(s*.88,-2.62,2.98)],Paint,.045) panel('Pilot window lower sill',[(s*.98,-3.45,1.96),(s*1.10,-3.20,1.90),(s*1.25,-1.77,1.99),(s*1.25,-1.77,2.10),(s*1.04,-3.30,2.07)],Paint,.045) panel('Nose upper skin',[(s*.02,-3.69,1.89),(s*.98,-3.43,1.95),(s*.99,-3.43,2.04),(s*.02,-3.64,2.035)],Paint,.04) # Pilots' solid lower doors and hinges. panel('Pilot lower door',[(s*1.10,-3.19,1.23),(s*1.245,-1.79,1.01),(s*1.25,-1.79,2.09),(s*1.09,-3.21,2.04)],Paint,.04) tube('Pilot door edge',[(s*1.12,-3.19,1.25),(s*1.27,-1.77,1.03),(s*1.27,-1.77,2.96),(s*.99,-2.52,2.97)],.012,Rubber) for z in (1.4,1.9):box('Cockpit hinge',(s*1.26,-1.80,z),(.055,.14,.08),Metal,.012) tube('Pilot handle',[(s*1.26,-2.08,1.84),(s*1.31,-2.08,1.89),(s*1.31,-1.91,1.89),(s*1.26,-1.91,1.84)],.018,Metal) # Gunner's bay forward of sliding door. box('Gunner lower skin',(s*1.255,-1.32,1.31),(.08,.89,.65),Paint,.027) box('Gunner forward jamb',(s*1.252,-1.755,1.96),(.09,.13,1.98),Paint,.022) box('Cabin eaves',(s*1.20,.0,2.99),(.17,4.3,.18),Paint,.035) box('Gunner station sill',(s*1.255,-1.32,1.73),(.075,.82,.38),Paint,.035) box('Gunner station aft post',(s*1.25,-.88,2.30),(.07,.085,1.32),Paint,.025) window('Gunner observation window',[(s*1.265,-1.67,1.99),(s*1.265,-.96,1.99),(s*1.22,-.96,2.87),(s*1.22,-1.67,2.87)]) # Tall passenger doorway surround, real opening underneath sliding panel. for y in (-.81,1.89):box('Door aperture post',(s*1.26,y,1.94),(.12,.23,2.06),Paint,.03) for z in (1.01,2.96):box('Door aperture sill',(s*1.27,.54,z),(.10,2.76,.10),Paint,.025) for z in (1.1,2.95): cyl('Sliding door rail',(s*1.34,-.88,z),(s*1.34,2.87,z),.029,Metal,16) for y in (-.7,.4,1.5,2.7):box('Rail stand off',(s*1.30,y,z),(.12,.12,.07),Paint,.016) # Sliding door, panel skin plus windows with empty space behind. GROUP='Door_L' if s==1 else 'Door_R' x=s*1.325 box('Sliding door lower panel',(x,.52,1.46),(.07,2.49,.87),Paint,.045) box('Sliding door header',(x,.52,2.82),(.07,2.49,.20),Paint,.035) box('Sliding window lower weather sill',(x,.52,1.929),(.075,2.49,.086),Paint,.012) for y in (-.705,.52,1.745):box('Sliding door mullion',(x,y,2.31),(.075,.12,.91),Paint,.028) for y in (-.09,1.13): window('Troop door window',[(x+s*.01,y-.50,1.95),(x+s*.01,y+.50,1.95),(x+s*.01,y+.50,2.70),(x+s*.01,y-.50,2.70)]) tube('Door perimeter gasket',[(x+s*.03,-.74,1.04),(x+s*.03,1.78,1.04),(x+s*.03,1.78,2.92),(x+s*.03,-.74,2.92)],.013,Rubber,True) for y in (-.62,1.65):box('Door roller housing',(x,y,2.97),(.15,.22,.10),Metal,.025) tube('Sliding door pull',[(x+s*.055,1.59,1.70),(x+s*.105,1.59,1.77),(x+s*.105,1.59,1.96),(x+s*.055,1.59,2.02)],.018,Metal) GROUP='Fuselage' # Boarding step folds and tubular hand rails. tube('Boarding step',[(s*1.16,-.73,1.01),(s*1.58,-.64,.78),(s*1.58,.74,.78),(s*1.18,.86,1.02)],.035,Metal) box('Tread step',(s*1.58,.06,.80),(.18,1.20,.055),Rubber,.013) # Interior floor, sidewall liners, roof ribs. box('Cabin floor',(0,.0,1.01),(2.30,5.7,.11),Interior,.04) for y in (-1.7,-.1,1.6): tube('Cabin roof rib',[(-1.17,y,1.10),(-1.17,y,2.9),(-.83,y,3.05),(.83,y,3.05),(1.17,y,2.9),(1.17,y,1.10)],.033,Interior) # cockpit seats, consoles, pedals and cyclics. SOCKETS=[] def socket(name,pos): o=bpy.data.objects.new(name,None);sc.collection.objects.link(o);o.location=pos;o.empty_display_size=.12;SOCKETS.append(o);return o for s in (-1,1): x=s*.57 box('Pilot seat pedestal',(x,-2.10,1.27),(.35,.42,.4),Metal,.04) box('Armoured seat cushion',(x,-2.13,1.55),(.58,.64,.15),Interior,.09) back=box('Armoured pilot seat back',(x,-1.86,1.97),(.63,.18,.81),Interior,.08);back.rotation_euler.x=-.12 box('Pilot headrest',(x,-1.84,2.40),(.34,.19,.22),Interior,.045) for dx in (-.16,.16):tube('Shoulder harness',[(x+dx,-1.985,2.29),(x+dx*.7,-2.02,1.84),(x+dx*.8,-2.2,1.62)],.025,Rubber) cyl('Cyclic stick',(x,-2.53,1.20),(x,-2.46,1.91),.025,Metal) box('Cyclic grip',(x,-2.46,1.95),(.065,.075,.16),Rubber,.02) for dx in (-.16,.16):box('Rudder pedal',(x+dx,-3.06,1.32),(.20,.10,.13),Metal,.015) socket('Seat_Pilot' if s==1 else 'Seat_Copilot',(x,-2.12,1.63)) # instrument panel with recessed displays and small gauge geometry, no text. box('Instrument coaming',(0,-2.96,1.98),(1.83,.33,.45),Rubber,.10) for x in (-.62,-.23,.23,.62): p=box('Display bezel',(x,-2.745,2.08),(.29,.055,.23),Metal,.023) box('Dark instrument screen',(x,-2.71,2.09),(.24,.012,.18),Glass,.012) for k in range(4):box('Display key',(x-.10+k*.065,-2.70,1.96),(.025,.017,.02),Interior,.004) for x in (-.81,0,.81): cyl('Round cockpit dial',(x,-2.70,1.93),(x,-2.68,1.93),.045,Metal,24) box('Centre console',(0,-2.31,1.35),(.29,1.0,.48),Rubber,.04) for y in (-2.6,-2.43,-2.26,-2.09): for x in (-.075,.075):cyl('Console toggle',(x,y,1.6),(x,y,1.64),.009,Metal,8) # Eleven troop seats with frames and belts. for i,(s,y) in enumerate([(s,y) for s in (-1,1) for y in (-.50,.28,1.06,1.84)]+[(-1,2.47),(0,2.47),(1,2.47)]): x=s*.88 if i<8 else s*.61 box('Troop seat pad',(x,y,1.39),(.48,.58,.12),Interior,.055) box('Troop seat back',(x+s*.15 if i<8 else x,y if i<8 else y+.19,1.78),(.12,.59,.66) if i<8 else (.50,.12,.66),Interior,.05) for dy in (-.22,.22):cyl('Seat tube frame',(x,y+dy,1.04),(x,y+dy,1.35),.022,Metal,10) tube('Lap restraint',[(x-.19,y,1.48),(x,y+.07,1.46),(x+.19,y,1.48)],.024,Rubber) socket('Troop_'+str(i+1),(x,y,1.49)) # Engine deck and sculpted transmission fairing. loft('Transmission roof fairing',[(-2.19,.30,3.04,3.15),(-1.6,.67,3.02,3.49),(-.7,.72,3.04,3.66),(.55,.69,3.04,3.68),(1.30,.48,3.07,3.42)],N=40,sub=2) for s in (-1,1): # nacelles aligned along y; intake ring and buried dark intake fan. loft('T700 engine cowling',[(-.87,.26,3.06,3.67),(-.71,.40,3.0,3.82),(-.40,.43,3.0,3.85),(1.55,.42,3.01,3.78),(2.0,.34,3.04,3.70),(2.19,.26,3.11,3.61)],N=40,sub=2) # move most recently registered nacelle off centre GROUPS[GROUP][-1].location.x=s*.78 cyl('Intake shadow',(s*.78,-.86,3.43),(s*.78,-.79,3.43),.306,Rubber,48) # curved lip torus oriented along Y bpy.ops.mesh.primitive_torus_add(major_radius=.315,minor_radius=.048,major_segments=48,minor_segments=12,location=(s*.78,-.86,3.43),rotation=(math.pi/2,0,0));register(bpy.context.object,Paint) cyl('Intake spinner',(s*.78,-1.02,3.43),(s*.78,-.72,3.43),.18,Rotor,32,r2=.27) for a in range(14): ang=a*math.tau/14 tube('Intake radial grille',[(s*.78+.13*math.cos(ang),-.88,3.43+.13*math.sin(ang)),(s*.78+.29*math.cos(ang+.15),-.88,3.43+.29*math.sin(ang+.15))],.014,Rotor) # Black Hawk angular exhaust suppression housing. x=s*.91 panel('Exhaust upper shroud',[(x-.41,1.57,3.85),(x+.41,1.57,3.85),(x+.44,2.52,3.63),(x-.44,2.52,3.63)],Paint,.10,.08) for dx in (-.41,.41):panel('Exhaust cheek',[(x+dx,1.64,3.75),(x+dx,2.48,3.64),(x+dx,2.59,3.12),(x+dx,1.82,3.10)],Paint,.09,.065) panel('Exhaust lower return',[(x-.40,1.82,3.08),(x+.40,1.82,3.08),(x+.40,2.59,3.11),(x-.40,2.59,3.11)],Paint,.075,.04) box('Exhaust soot cavity',(x,2.42,3.35),(.70,.10,.42),Rubber,.10) for j in range(6):box('Exhaust diffuser',(x-.29+j*.115,2.50,3.34),(.025,.13,.33),Metal,.01) socket('Exhaust_L' if s==1 else 'Exhaust_R',(x,2.56,3.34)) for y in (-.34,.65,1.54): # transverse band fine seams conform visually to rounded engine shell. pts=[(s*.78+.431*math.cos(a),y,3.425+.429*math.sin(a)) for a in np.linspace(0,math.pi,22)] tube('Engine cowling seam',pts,.008,Rubber) # Engine latch hardware. for y in (-.2,1.15):box('Cowling latch',(s*1.205,y,3.34),(.035,.15,.065),Metal,.012) # Main landing gear: front pair and rear tail wheel, tyres rest on ground. def wheel(name,x,y,z,r,width): # torus about X, bulbous tyre with real circumferential grooves bpy.ops.mesh.primitive_torus_add(major_radius=r*.73,minor_radius=r*.27,major_segments=56,minor_segments=16,location=(x,y,z),rotation=(0,math.pi/2,0)) o=bpy.context.object;o.name=name+' tyre';o.scale.z=width/(r*.54);register(o,Rubber) for p in o.data.polygons:p.use_smooth=True cyl(name+' wheel rim',(x-width*.52,y,z),(x+width*.52,y,z),r*.48,Metal,40) for s in (-1,1): cyl(name+' painted hub',(x+s*width*.53,y,z),(x+s*width*.58,y,z),r*.33,Paint,32) cyl(name+' axle cap',(x+s*width*.59,y,z),(x+s*width*.64,y,z),r*.16,Metal,24) for a in range(8): ang=a*math.tau/8;cyl('Wheel bolt',(x+s*width*.585,y+math.cos(ang)*r*.245,z+math.sin(ang)*r*.245),(x+s*width*.62,y+math.cos(ang)*r*.245,z+math.sin(ang)*r*.245),.018,Metal,8) # fine tread ribs wrapped over tyre crown for a in range(44): ang=a*math.tau/44 pts=[] for t in np.linspace(-.8,.8,5): rr=r*.73+(r*.27-.009)*math.cos(t);pts.append((x+width*.49*math.sin(t),y+rr*math.sin(ang+.025*t),z+rr*math.cos(ang+.025*t))) tube('Tyre tread rib',pts,.009,Rubber) for s in (-1,1): wheel('Main gear',s*1.59,-1.03,.45,.45,.31) cyl('Main gear lower oleo',(s*1.57,-1.03,.49),(s*1.45,-.93,1.19),.082,Metal,24) cyl('Main gear upper strut',(s*1.45,-.93,.93),(s*1.21,-.84,1.66),.12,Paint,24) cyl('Gear drag brace',(s*1.13,-2.24,1.06),(s*1.59,-1.03,.55),.060,Paint,20) cyl('Gear cross brace',(s*.79,-.10,1.08),(s*1.56,-1.03,.53),.05,Metal,16) tube('Brake hydraulic hose',[(s*1.25,-.84,1.47),(s*1.50,-.87,1.04),(s*1.64,-.94,.61)],.012,Rubber) ellipsoid('Gear shoulder fairing',(s*1.15,-1.91,1.02),(.51,.24,.115),Paint) wheel('Tail gear',0,8.59,.265,.265,.19) for s in (-1,1): cyl('Tail wheel fork',(s*.16,8.56,.27),(s*.16,8.35,.61),.035,Metal,16) panel('Tail gear trailing arm',[(-.10,7.56,1.59),(-.10,7.79,1.68),(-.10,8.63,.38),(-.10,8.45,.30)],Paint,.20,.055) cyl('Tail gear upper oleo',(0,7.96,1.62),(0,8.22,.98),.095,Paint,24) cyl('Tail gear polished piston',(0,8.20,1.05),(0,8.43,.52),.057,Metal,24) cyl('Tail gear keel pivot',(-.21,7.72,1.58),(.21,7.72,1.58),.115,Metal,24) # Fin: swept asymmetric tapered solid airfoil with bevels. finpts=[(-.12,8.22,1.73),(-.12,9.02,2.38),(-.12,10.26,4.24),(-.12,10.76,4.20),(-.12,10.93,3.92),(-.12,9.73,1.84),(-.12,9.53,1.68)] panel('Swept tail pylon',finpts,Paint,.26,.065) # Leading-edge erosion shield follows swept fin. panel('Tail leading edge boot',[(-.263,8.53,2.10),(-.263,10.26,4.24),(-.263,10.47,4.22),(-.263,8.76,2.07)],Rotor,.018,.015) # Tail stabilator airfoils, dihedral low on fin. def wing(name,start,end,chordroot,chordtip,mat=Paint): st,en=Vector(start),Vector(end);axis=(en-st).normalized();long=Vector((0,1,0));up=axis.cross(long).normalized();vs=[];fs=[];N=24 for t in (0,.15,.65,1): c=chordroot*(1-t)+chordtip*t;cent=st.lerp(en,t) for j in range(N): a=math.tau*j/N;vs.append(cent+long*(math.cos(a)*c*.5)+up*(math.sin(a)*c*.07)) for k in range(3): for j in range(N):fs.append((k*N+j,k*N+(j+1)%N,(k+1)*N+(j+1)%N,(k+1)*N+j)) fs.extend([tuple(reversed(range(N))),tuple(3*N+j for j in range(N))]);return mesh(name,vs,fs,mat,True) for s in (-1,1):wing('Horizontal stabilator',(s*.15,8.82,2.20),(s*2.14,8.88,2.30),1.13,.53) # External stores stub wings and braces; hardpoint empty pairs. for s in (-1,1): wing('External stores pylon',(s*1.08,-1.16,2.93),(s*2.55,-.94,2.72),1.02,.48) cyl('Pylon brace',(s*1.16,-.85,1.48),(s*2.29,-.91,2.70),.065,Paint,20) for j,x in enumerate((1.90,2.38),1): box('Pylon shackle',(s*x,-.88,2.56),(.14,.44,.20),Metal,.025) for yy in (-1.06,-.71):cyl('Store release lug',(s*(x-.10),yy,2.44),(s*(x+.10),yy,2.44),.027,Metal,12) socket(('Hardpoint_L' if s==1 else 'Hardpoint_R')+str(j),(s*x,-.88,2.42)) # Door-mounted general purpose machine guns, receivers, barrels, pintles, belts (not a chin turret). for s in (-1,1): cyl('Gunner pintle',(s*1.37,-1.26,1.53),(s*1.54,-1.25,2.05),.041,Metal,16) cyl('Gun traverse bearing',(s*1.47,-1.25,2.00),(s*1.63,-1.25,2.00),.085,Metal,24) box('Door gun receiver',(s*1.68,-1.25,2.14),(.16,.49,.17),Rotor,.025) cyl('Machine gun barrel',(s*1.69,-1.46,2.18),(s*1.79,-2.36,2.18),.025,Metal,20) cyl('Barrel shroud',(s*1.69,-1.48,2.18),(s*1.75,-1.98,2.18),.045,Rotor,20) cyl('Muzzle flash hider',(s*1.79,-2.33,2.18),(s*1.80,-2.45,2.18),.040,Metal,20) for y in (-1.64,-1.79,-1.94): cyl('Barrel cooling collar',(s*1.71,y,2.18),(s*1.72,y-.028,2.18),.047,Metal,16) tube('Gun carry handle',[(s*1.67,-1.48,2.19),(s*1.67,-1.39,2.34),(s*1.67,-1.19,2.34)],.018,Metal) box('Gun rear grip',(s*1.68,-.96,2.06),(.085,.10,.22),Rubber,.02) box('Ammunition box',(s*1.78,-.91,1.87),(.24,.35,.28),Rotor,.025) for k in range(13): t=k/12;tube('Ammunition feed link',[(s*(1.78+.12*math.sin(t*math.pi)),-.94-.2*t,2.00+.17*t),(s*(1.87+.12*math.sin(t*math.pi)),-.94-.2*t,2.00+.17*t)],.019,Metal) # Mast and swashplate, stationary below rotor node. cyl('Mast housing',(0,0,3.36),(0,0,3.89),.22,Paint,40) cyl('Mast shaft',(0,0,3.78),(0,0,4.30),.115,Metal,32) for z,r in ((3.81,.29),(3.88,.26),(4.12,.21)): cyl('Swashplate',(0,0,z-.035),(0,0,z+.035),r,Metal,40) for a in (0,math.pi/2,math.pi,math.pi*1.5): cyl('Rotor servo rod',(.27*math.cos(a),.27*math.sin(a),3.62),(.35*math.cos(a+.2),.35*math.sin(a+.2),4.18),.024,Metal,12) # Four true closed NACA-like airfoil blades, twist root to tip, tapered/swept tips. def blade(name,origin,rad,chord,angle,axis=(0,0,1),tail=False): axis=Vector(axis).normalized();u=Vector((1,0,0)) if abs(axis.x)<.8 else Vector((0,1,0));u=(u-axis*u.dot(axis)).normalized();v=axis.cross(u) u,v=u*math.cos(angle)+v*math.sin(angle),-u*math.sin(angle)+v*math.cos(angle) vs=[];fs=[];sections=20;profile=24 for k in range(sections): t=k/(sections-1);r=(.23 if tail else .53)+(rad-(.23 if tail else .53))*t c=chord*(.74 if t<.07 else 1)* (1-.24*max(0,(t-.83)/.17)) sweep=.26*max(0,(t-.81)/.19) if not tail else .07*t twist=math.radians(10-15*t) for j in range(profile): a=math.tau*j/profile;xx=(1-math.cos(a))*.5 thickness=5*.12*(.2969*math.sqrt(max(xx,0))-.126*xx-.3516*xx*xx+.2843*xx**3-.1036*xx**4) zz=math.copysign(thickness,math.sin(a))+.018*math.sin(math.pi*xx) q=(xx-.28)*c;h=zz*c q,h=q*math.cos(twist)-h*math.sin(twist),q*math.sin(twist)+h*math.cos(twist) droop=-.105*t*t if not tail else 0 vs.append(Vector(origin)+u*r+v*(q+sweep)+axis*(h+droop)) for k in range(sections-1): for j in range(profile):fs.append((k*profile+j,k*profile+(j+1)%profile,(k+1)*profile+(j+1)%profile,(k+1)*profile+j)) fs.extend([tuple(reversed(range(profile))),tuple((sections-1)*profile+j for j in range(profile))]) o=mesh(name,vs,fs,Rotor,True) # Thin leading edge metal erosion strip laid as a closed narrow cross section. return o GROUP='MainRotor';hub=(0,0,4.30) cyl('Rotating hub',(0,0,4.20),(0,0,4.40),.27,Metal,40) ellipsoid('Rotor hub cap',(0,0,4.40),(.23,.23,.06),Rotor) for i in range(4): a=math.radians(-12)+i*math.pi/2 d=Vector((math.cos(a),math.sin(a),0)) cyl('Blade spindle',Vector(hub)+d*.15,Vector(hub)+d*.65,.08,Metal,24) cyl('Blade root grip',Vector(hub)+d*.41,Vector(hub)+d*.78,.10,Rotor,20) blade('Twisted composite main rotor',hub,8.2,.49,a) for rr in (.32,.49,.65): p=Vector(hub)+d*rr;cyl('Rotor bolt',(p.x,p.y,4.30),(p.x,p.y,4.43),.03,Metal,10) cyl('Pitch change link',(.26*math.cos(a-.2),.26*math.sin(a-.2),4.06),(.53*math.cos(a+.15),.53*math.sin(a+.15),4.32),.021,Metal,12) GROUP='TailRotor';tailhub=Vector((-.28,10.47,4.14));tailaxis=Vector((-.94,0,.342)).normalized() cyl('Tail rotor shaft',tailhub-tailaxis*.18,tailhub+tailaxis*.15,.095,Metal,24) ellipsoid('Tail rotor gearbox',tailhub-tailaxis*.1,(.26,.23,.23),Paint) for i in range(4): a=math.radians(31)+i*math.pi/2 blade('Canted tail airfoil',tailhub+tailaxis*.18,1.13,.205,a,tailaxis,True) ellipsoid('Tail rotor hub cover',tailhub+tailaxis*.22,(.12,.16,.16),Paint) GROUP='Fuselage' # Navigation lights and beacon, electrical fairings and aerials. for s in (-1,1): ellipsoid('Navigation lamp housing',(s*2.54,-.95,2.74),(.11,.15,.065),Rotor) ellipsoid('Navigation lamp lens',(s*2.56,-.99,2.78),(.065,.08,.038),Lamps) socket('Light_Nav_L' if s==1 else 'Light_Nav_R',(s*2.57,-.98,2.78)) box('Beacon foot',(0,10.38,4.24),(.13,.16,.055),Rotor,.02) ellipsoid('Anti collision beacon',(0,10.38,4.30),(.055,.065,.07),Lamps) socket('Light_Beacon',(0,10.38,4.30)) for x in (-.27,.27): ellipsoid('Nose landing lamp recess',(x,-4.29,1.32),(.13,.075,.11),Rubber) ellipsoid('Nose landing lamp glass',(x,-4.355,1.32),(.092,.022,.078),Lamps) # Ventral and roof antennas. panel('Dorsal antenna',[(0,2.4,3.1),(0,2.49,3.54),(0,2.63,3.53),(0,2.69,3.1)],Rotor,.035,.008) panel('Nose roof antenna',[(0,-1.36,3.37),(0,-1.78,3.79),(0,-1.17,3.46)],Paint,.025,.008) tube('Tail antenna cable',[(.19,4.0,1.34),(.25,5.45,1.19),(.23,7.6,1.32)],.012,Metal) for y in (3.9,6.1,7.5):box('Tail antenna anchor',(.19,y,1.49),(.09,.11,.16),Paint,.016) # Panel seam networks with rivet rows: calm broad panels, local construction detail. for s in (-1,1): # Aft maintenance hatch, raised lip around inset dark line. for yy,w,h in ((2.43,.57,.81),(3.0,.32,.45)): xx=s*(1.18 if yy<2.6 else 1.03) pts=[(xx,yy-w/2,1.61),(xx,yy+w/2,1.61),(xx,yy+w/2,1.61+h),(xx,yy-w/2,1.61+h)] panel('Flush maintenance hatch',pts,Paint,.012,.014);tube('Recessed hatch seam',pts,.009,Rubber,True) box('Hatch latch',(xx+s*.025,yy,1.72),(.027,.11,.05),Metal,.008) # skin rivets follow the long lower cabin sill and crown. for y in np.arange(-2.05,2.0,.115): xx=s*(1.25 if y>-2.2 else 1.20) for z in (1.14,2.98): # low-profile hemispherical rivets, not large bolts ellipsoid('Skin flush rivet',(xx,y,z),(.007,.013,.013),Metal,8,4) # Door rivets belong to door so they travel with it. GROUP='Door_L' if s==1 else 'Door_R' for y in np.arange(-.65,1.73,.13): for z in (1.10,1.83,2.85):ellipsoid('Door rivet',(s*1.369,y,z),(.006,.012,.012),Metal,8,4) GROUP='Fuselage' # boom panel bands and top access covers. for y in (4.25,5.65,7.0,8.15): t=(y-4.25)/4;w=.63*(1-t)+.25*t;bot=1.32+.25*t;top=2.44-.34*t pts=[(s*w*math.cos(a),y,(bot+top)/2+(top-bot)*.5*math.sin(a)) for a in np.linspace(-math.pi/2,math.pi/2,22)] tube('Tail service joint',pts,.0065,Rubber) for y in (3.36,4.55,6.05):box('Tail access cap',(s*.21,y,2.49-(y-3.36)*.105),(.25,.35,.025),Paint,.025) # cabin top ventilation louvres. for yy in np.arange(2.31,2.82,.082):box('Vent louvre',(s*1.12,yy,2.76),(.03,.037,.19),Rotor,.01) # Windscreen wipers and pivots. for s in (-1,1): cyl('Wiper pivot',(s*.63,-3.51,2.01),(s*.63,-3.54,2.06),.034,Metal,16) tube('Wiper arm',[(s*.63,-3.54,2.06),(s*.43,-3.19,2.46),(s*.46,-2.95,2.71)],.012,Metal) tube('Wiper blade',[(s*.25,-3.26,2.44),(s*.62,-3.12,2.52)],.018,Rubber) print('GEOMETRY_BUILT',len(bpy.data.objects),'elapsed',time.time()-START,flush=True) # Apply all transforms and explicit metre-scaled tiled UVs, then collapse rigid assemblies. def make_uv(o): active(o);bpy.ops.object.transform_apply(location=False,rotation=True,scale=True) me=o.data;uv=me.uv_layers.new(name='UVMap') if not me.uv_layers else me.uv_layers.active # UV coordinates use dominant axis per polygon, shared 1.6m tile. No huge unique atlas. for p in me.polygons: n=p.normal;ax=max(range(3),key=lambda i:abs(n[i]));axes=[i for i in range(3) if i!=ax] for li in p.loop_indices: co=o.matrix_world @ me.vertices[me.loops[li].vertex_index].co uv.data[li].uv=(co[axes[0]]/1.6,co[axes[1]]/1.6) def merge(name,objects,origin): for o in objects:make_uv(o) bpy.ops.object.select_all(action='DESELECT') for o in objects:o.select_set(True) bpy.context.view_layer.objects.active=objects[0];bpy.ops.object.join();o=bpy.context.object;o.name=name sc.cursor.location=origin;bpy.ops.object.origin_set(type='ORIGIN_CURSOR');active(o);bpy.ops.object.transform_apply(location=False,rotation=True,scale=True) # Triangulate deterministically and discard tiny numerical degenerate faces. bm=bmesh.new();bm.from_mesh(o.data);bmesh.ops.triangulate(bm,faces=bm.faces[:]);tiny=[f for f in bm.faces if f.calc_area()<1e-11] if tiny:bmesh.ops.delete(bm,geom=tiny,context='FACES') bm.to_mesh(o.data);bm.free();return o ORIGINS={'Fuselage':(0,0,0),'MainRotor':hub,'TailRotor':tuple(tailhub),'Door_L':(1.325,-.74,2.95),'Door_R':(-1.325,-.74,2.95)} ASSEMBLIES=[merge(name,obs,ORIGINS[name]) for name,obs in GROUPS.items()] tri=sum(len(o.data.polygons) for o in ASSEMBLIES) if tri>135000: body=next(o for o in ASSEMBLIES if o.name=='Fuselage');other=tri-len(body.data.polygons) active(body);dec=body.modifiers.new('Game geometry budget','DECIMATE');dec.ratio=(132000-other)/len(body.data.polygons);dec.use_collapse_triangulate=True;bpy.ops.object.modifier_apply(modifier=dec.name) bm=bmesh.new();bm.from_mesh(body.data);tiny=[f for f in bm.faces if f.calc_area()<1e-11] if tiny:bmesh.ops.delete(bm,geom=tiny,context='FACES') bm.to_mesh(body.data);bm.free() tri=sum(len(o.data.polygons) for o in ASSEMBLIES) assert 60000<=tri<=140000,tri print('TRIANGLES',tri,flush=True) # Add semantic metadata to exported nodes. for o in ASSEMBLIES: if o.name.startswith('Door_'):o['motion']='slide';o['slide_axis']=[0,0,-1];o['slide_distance_m']=2.45 if o.name=='MainRotor':o['spin_axis']=[0,1,0] if o.name=='TailRotor':o['spin_axis']=[tailaxis.x,tailaxis.z,-tailaxis.y] # Export uncompressed interoperable GLB and inject the exact neutral paint tint contract. bpy.ops.object.select_all(action='DESELECT') for o in ASSEMBLIES+SOCKETS:o.select_set(True) OUT=ROOT/'blackhawk-helicopter.glb' bpy.ops.export_scene.gltf(filepath=str(OUT),export_format='GLB',use_selection=True,export_apply=True,export_yup=True,export_extras=True,export_image_format='AUTO',export_cameras=False,export_lights=False) raw=OUT.read_bytes();jl=struct.unpack_from('.', 'Differences: reference-inspired utility fit; no optional rocket/missile payload; simplified internal avionics and engine mechanisms; baked wear is tiled, panel seams/rivets are geometry.' ])+'\n') print('FIRST_COMPLETE_GLB',OUT.stat().st_size,'elapsed',time.time()-START,flush=True) # Render from the exact exported material setup, with matching paint multiplication. bs=Paint.node_tree.nodes.get('Principled BSDF');tex=Paint.node_tree.nodes.get('Baked Base');tint=Paint.node_tree.nodes.new('ShaderNodeMixRGB');tint.name='Game paint factor';tint.blend_type='MULTIPLY';tint.inputs[0].default_value=1;tint.inputs[2].default_value=(.08,.09,.07,1);Paint.node_tree.links.new(tex.outputs['Color'],tint.inputs[1]);Paint.node_tree.links.new(tint.outputs[0],bs.inputs['Base Color']) # Neutral daylight studio floor only in renders. floor=bpy.data.materials.new('Studio only');floor.diffuse_color=(.24,.265,.29,1);floor.use_nodes=True;floor.node_tree.nodes.get('Principled BSDF').inputs['Base Color'].default_value=(.24,.265,.29,1);floor.node_tree.nodes.get('Principled BSDF').inputs['Roughness'].default_value=.9 bpy.ops.mesh.primitive_plane_add(size=200,location=(0,0,-.017));ground=bpy.context.object;ground.name='Render ground (not exported)';ground.data.materials.append(floor) sc.world.use_nodes=True;sc.world.node_tree.nodes.get('Background').inputs[0].default_value=(.65,.74,.85,1);sc.world.node_tree.nodes.get('Background').inputs[1].default_value=.6 def area(name,loc,power,size,color): dat=bpy.data.lights.new(name,'AREA');dat.energy=power;dat.shape='DISK';dat.size=size;dat.color=color;o=bpy.data.objects.new(name,dat);sc.collection.objects.link(o);o.location=loc;o.rotation_euler=(Vector((0,1,1.8))-o.location).to_track_quat('-Z','Y').to_euler() area('Large soft daylight',(3,-8,14),2400,9,(1,.94,.86));area('Cool sky fill',(-9,-1,8),1800,10,(.75,.85,1));area('Aft rim',(2,11,11),2900,8,(1,.97,.9)) dat=bpy.data.lights.new('Daylight sun','SUN');dat.energy=1.35;dat.angle=.15;o=bpy.data.objects.new('Daylight sun',dat);sc.collection.objects.link(o);o.rotation_euler=(.35,-.4,-.35) camdat=bpy.data.cameras.new('Render camera');cam=bpy.data.objects.new('Render camera',camdat);sc.collection.objects.link(cam);sc.camera=cam;camdat.type='ORTHO' def camera(loc,target,scale): cam.location=loc;cam.rotation_euler=(Vector(target)-cam.location).to_track_quat('-Z','Y').to_euler();camdat.ortho_scale=scale # Fit from geometry projected onto desired camera, retaining useful frame margin. center=Vector((0,2.1,2.0));direction=Vector((1.15,-1.65,.67)).normalized() cam.location=center+direction*35;cam.rotation_euler=(center-cam.location).to_track_quat('-Z','Y').to_euler() bpy.context.view_layer.update();inv=cam.matrix_world.inverted();localpts=[inv@p for p in pts] spanx=max(p.x for p in localpts)-min(p.x for p in localpts);spany=max(p.y for p in localpts)-min(p.y for p in localpts) hero_scale=max(spanx,spany*1920/1080)*1.12 mid_x=(max(p.x for p in localpts)+min(p.x for p in localpts))*.5 mid_y=(max(p.y for p in localpts)+min(p.y for p in localpts))*.5 shift=cam.matrix_world.to_quaternion()@Vector((mid_x,mid_y,0)) center+=shift;cam.location+=shift hero_loc=cam.location.copy();hero_target=center.copy();camera(hero_loc,hero_target,hero_scale) sc.render.resolution_x=1920;sc.render.resolution_y=1080;sc.render.resolution_percentage=65 if DRAFT else 100;sc.cycles.samples=24 if DRAFT else 48 sc.render.filepath=str(ROOT/'final.png');bpy.ops.render.render(write_still=True) # Clay uses material override, no texture trickery. clay=bpy.data.materials.new('Clay QA');clay.use_nodes=True;cb=clay.node_tree.nodes.get('Principled BSDF');cb.inputs['Base Color'].default_value=(.42,.42,.42,1);cb.inputs['Roughness'].default_value=.72 sc.view_layers[0].material_override=clay;sc.render.filepath=str(ROOT/'clay.png');bpy.ops.render.render(write_still=True);sc.view_layers[0].material_override=None camera((28,1.7,2.6),(0,1.7,2.6),21.5);sc.render.filepath=str(ROOT/'side.png');bpy.ops.render.render(write_still=True) camera(hero_loc,hero_target,hero_scale) # 3 by 2 recolour proof, same view and lighting. Assemble using Blender pixel buffers. sc.render.resolution_x=640;sc.render.resolution_y=360;sc.render.resolution_percentage=100;sc.cycles.samples=12 canvas=np.zeros((720,1920,4),dtype=np.float32) for i,p in enumerate(paints): tint.inputs[2].default_value=tuple(p['linear_rgb'])+(1,);sc.render.filepath=str(CACHE/f'paint_{i}.png');bpy.ops.render.render(write_still=True) im=bpy.data.images.load(sc.render.filepath,check_existing=False);arr=np.array(im.pixels[:],dtype=np.float32).reshape((360,640,4));row=1-i//3;col=i%3;canvas[row*360:(row+1)*360,col*640:(col+1)*640]=arr;bpy.data.images.remove(im) out=bpy.data.images.new('Six paints',1920,720,alpha=True);out.pixels.foreach_set(canvas.ravel());out.filepath_raw=str(ROOT/'paints.png');out.file_format='PNG';out.save() tint.inputs[2].default_value=(.08,.09,.07,1) print('BUILD_COMPLETE',time.time()-START,flush=True)