"""A7V game asset. Blender 5.2: -b --python-exit-code 1 --python build_a7v-tank.py Clean build includes CC0 downloads, Cycles GPU material bakes, two exports and import proofs. Authoring coordinates: X left, -Y forward, Z up. glTF conversion produces X left,Y up,Z forward. """ import bpy, bmesh, math, os, json, random, struct, urllib.request, sys, subprocess from pathlib import Path from mathutils import Vector, Matrix from math import sin,cos,pi import numpy as np ROOT=Path(__file__).resolve().parent TEX=ROOT/'textures'; TEX.mkdir(exist_ok=True) random.seed(74) # Reference dimensions refer to the armour envelope, excluding gun barrels. DIM=Vector((3.07/3.038,7.34/6.871,1.0)) def scaled(p):return Vector((p[0]*DIM.x,p[1]*DIM.y,p[2]*DIM.z)) bpy.ops.wm.read_factory_settings(use_empty=True) S=bpy.context.scene;S.unit_settings.system='METRIC';S.render.engine='CYCLES' S.cycles.samples=24;S.cycles.use_denoising=True prefs=bpy.context.preferences.addons['cycles'].preferences prefs.compute_device_type='OPTIX';prefs.get_devices() for dev in prefs.devices:dev.use=dev.type=='OPTIX' S.cycles.device='GPU';S.cycles.bake_type='EMIT' S.render.image_settings.file_format='PNG';S.view_settings.view_transform='AgX' PAINTS=[('field grey',[.19,.22,.19]),('olive drab',[.20,.22,.10]),('desert tan',[.55,.42,.26]),('winter white',[.78,.79,.73]),('dark green-black',[.055,.075,.06]),('panzer grey',[.115,.135,.15])] IDS=['metal_plate','rusty_metal_03'] def fetch(url,path): if not path.exists(): req=urllib.request.Request(url,headers={'User-Agent':'Mozilla/5.0'}) with urllib.request.urlopen(req,timeout=90) as r:path.write_bytes(r.read()) for ident in IDS: for mp in ['diff','nor_gl','arm']: p=TEX/f'{ident}_{mp}_1k.jpg' fetch(f'https://dl.polyhaven.org/file/ph-assets/Textures/jpg/1k/{ident}/{ident}_{mp}_1k.jpg',p) print('TEXTURES_READY',flush=True) MATS={};BAKES=[] def texture(nt,path,noncolor=False): n=nt.nodes.new('ShaderNodeTexImage');n.image=bpy.data.images.load(str(path),check_existing=True) if noncolor:n.image.colorspace_settings.name='Non-Color' return n def make_mat(name,colour,metal,rough,ident='metal_plate',res=512): # Bake a shared 2 m tiling/trim swatch; geometry uses metre-scaled UVs. m=bpy.data.materials.new(name);m.use_nodes=True;nt=m.node_tree;nt.nodes.clear();lk=nt.links out=nt.nodes.new('ShaderNodeOutputMaterial');p=nt.nodes.new('ShaderNodeBsdfPrincipled');lk.new(p.outputs[0],out.inputs['Surface']) uv=nt.nodes.new('ShaderNodeTexCoord');diff=texture(nt,TEX/f'{ident}_diff_1k.jpg');norm=texture(nt,TEX/f'{ident}_nor_gl_1k.jpg',True);arm=texture(nt,TEX/f'{ident}_arm_1k.jpg',True) for n in [diff,norm,arm]:lk.new(uv.outputs['UV'],n.inputs['Vector']) bw=nt.nodes.new('ShaderNodeRGBToBW');lk.new(diff.outputs['Color'],bw.inputs[0]) ramp=nt.nodes.new('ShaderNodeValToRGB');ramp.color_ramp.elements[0].position=.08;ramp.color_ramp.elements[1].position=.8 if name=='Paint':lo=(.46,.46,.45,1);hi=(.94,.95,.94,1) else:lo=(*[c*.40 for c in colour],1);hi=(*[min(1,c*1.6) for c in colour],1) ramp.color_ramp.elements[0].color=lo;ramp.color_ramp.elements[1].color=hi;lk.new(bw.outputs[0],ramp.inputs[0]) mapping=nt.nodes.new('ShaderNodeVectorMath');mapping.operation='MULTIPLY';mapping.inputs[1].default_value=(48,2.3,1);lk.new(uv.outputs['UV'],mapping.inputs[0]) noise=nt.nodes.new('ShaderNodeTexNoise');noise.inputs['Scale'].default_value=4;noise.inputs['Detail'].default_value=3;lk.new(mapping.outputs[0],noise.inputs['Vector']) grime=nt.nodes.new('ShaderNodeValToRGB');grime.color_ramp.elements[0].position=.25;grime.color_ramp.elements[0].color=(.45,.45,.44,1);grime.color_ramp.elements[1].position=.62;grime.color_ramp.elements[1].color=(1,1,1,1);lk.new(noise.outputs['Fac'],grime.inputs[0]) mix=nt.nodes.new('ShaderNodeMixRGB');mix.blend_type='MULTIPLY';mix.inputs[0].default_value=.15 if name=='Paint' else .42;lk.new(ramp.outputs['Color'],mix.inputs[1]);lk.new(grime.outputs['Color'],mix.inputs[2]);lk.new(mix.outputs[0],p.inputs['Base Color']) if name=='Paint': coarse=nt.nodes.new('ShaderNodeTexNoise');coarse.inputs['Scale'].default_value=7;coarse.inputs['Detail'].default_value=5;coarse.inputs['Roughness'].default_value=.72;lk.new(uv.outputs['UV'],coarse.inputs['Vector']) cr=nt.nodes.new('ShaderNodeValToRGB');cr.color_ramp.elements[0].position=.27;cr.color_ramp.elements[0].color=(.48,.48,.47,1);cr.color_ramp.elements[1].position=.72;cr.color_ramp.elements[1].color=(1,1,1,1);lk.new(coarse.outputs['Fac'],cr.inputs[0]) cm=nt.nodes.new('ShaderNodeMixRGB');cm.blend_type='MULTIPLY';cm.inputs[0].default_value=.5;lk.new(mix.outputs[0],cm.inputs[1]);lk.new(cr.outputs[0],cm.inputs[2]);mix=cm uvsep=nt.nodes.new('ShaderNodeSeparateXYZ');lk.new(uv.outputs['UV'],uvsep.inputs[0]) mudedge=nt.nodes.new('ShaderNodeMath');mudedge.operation='MULTIPLY_ADD';mudedge.inputs[1].default_value=.16;lk.new(coarse.outputs['Fac'],mudedge.inputs[0]);lk.new(uvsep.outputs['Y'],mudedge.inputs[2]) mudr=nt.nodes.new('ShaderNodeValToRGB');mudr.color_ramp.elements[0].position=.10;mudr.color_ramp.elements[0].color=(.20,.20,.19,1);mudr.color_ramp.elements[1].position=.38;mudr.color_ramp.elements[1].color=(1,1,1,1);lk.new(mudedge.outputs[0],mudr.inputs[0]) dirty=nt.nodes.new('ShaderNodeMixRGB');dirty.blend_type='MULTIPLY';dirty.inputs[0].default_value=.80;lk.new(mix.outputs[0],dirty.inputs[1]);lk.new(mudr.outputs[0],dirty.inputs[2]);mix=dirty;lk.new(mix.outputs[0],p.inputs['Base Color']) nm=nt.nodes.new('ShaderNodeNormalMap');nm.inputs['Strength'].default_value=.055 if name=='Paint' else .30;lk.new(norm.outputs[0],nm.inputs['Color']);lk.new(nm.outputs[0],p.inputs['Normal']) sep=nt.nodes.new('ShaderNodeSeparateColor');lk.new(arm.outputs[0],sep.inputs[0]) rr=nt.nodes.new('ShaderNodeMapRange');rr.inputs['To Min'].default_value=max(.42,rough-.12);rr.inputs['To Max'].default_value=min(.98,rough+.12);lk.new(sep.outputs[1],rr.inputs[0]);lk.new(rr.outputs[0],p.inputs['Roughness']);p.inputs['Metallic'].default_value=metal bpy.ops.mesh.primitive_plane_add(size=2);o=bpy.context.object;o.name='BakeFixture';o.data.materials.append(m) active=nt.nodes.new('ShaderNodeTexImage');nt.nodes.active=active emit=nt.nodes.new('ShaderNodeEmission') baked={} for mode,sz in [('base',res),('normal',res),('orm',512)]: im=bpy.data.images.new(name+'_'+mode,width=sz,height=sz,alpha=False) if mode!='base':im.colorspace_settings.name='Non-Color' active.image=im;nt.nodes.active=active if mode=='base': lk.new(mix.outputs[0],emit.inputs[0]);lk.new(emit.outputs[0],out.inputs[0]);bpy.ops.object.bake(type='EMIT') elif mode=='normal': lk.new(p.outputs[0],out.inputs[0]);bpy.ops.object.bake(type='NORMAL') else: comb=nt.nodes.new('ShaderNodeCombineColor');lk.new(sep.outputs[0],comb.inputs[0]);comb.inputs[2].default_value=metal;lk.new(rr.outputs[0],comb.inputs[1]);lk.new(comb.outputs[0],emit.inputs[0]);lk.new(emit.outputs[0],out.inputs[0]);bpy.ops.object.bake(type='EMIT') im.filepath_raw=str(TEX/f'{name}_{mode}.png');im.file_format='PNG';im.save();baked[mode]=im bpy.data.objects.remove(o,do_unlink=True) nt.nodes.clear();out=nt.nodes.new('ShaderNodeOutputMaterial');p=nt.nodes.new('ShaderNodeBsdfPrincipled');lk.new(p.outputs[0],out.inputs[0]) bn=nt.nodes.new('ShaderNodeTexImage');bn.image=baked['base'];nn=nt.nodes.new('ShaderNodeTexImage');nn.image=baked['normal'];on=nt.nodes.new('ShaderNodeTexImage');on.image=baked['orm'] if name=='Paint': mul=nt.nodes.new('ShaderNodeMixRGB');mul.name='PaintFactor';mul.blend_type='MULTIPLY';mul.inputs[0].default_value=1;mul.inputs[2].default_value=(*PAINTS[0][1],1);lk.new(bn.outputs[0],mul.inputs[1]);lk.new(mul.outputs[0],p.inputs['Base Color']) else:lk.new(bn.outputs[0],p.inputs['Base Color']) normal=nt.nodes.new('ShaderNodeNormalMap');lk.new(nn.outputs[0],normal.inputs[0 if False else 'Color']);lk.new(normal.outputs[0],p.inputs['Normal']) sep=nt.nodes.new('ShaderNodeSeparateColor');lk.new(on.outputs[0],sep.inputs[0]);lk.new(sep.outputs[1],p.inputs['Roughness']);lk.new(sep.outputs[2],p.inputs['Metallic']) # Exporter-supported occlusion group. 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=nt.nodes.new('ShaderNodeGroup');gn.node_tree=group;lk.new(sep.outputs[0],gn.inputs['Occlusion']) if name=='Lamps':p.inputs['Emission Color'].default_value=(.55,.39,.19,1);p.inputs['Emission Strength'].default_value=.1 MATS[name]=m;BAKES.append({'material':name,'colour_normal':res,'ORM':512,'device':'OPTIX','passes':['EMIT base','NORMAL tangent','EMIT ORM'],'source':ident}) print('BAKED',name,flush=True) for args in [('Paint',(1,1,1),.12,.82,'metal_plate',1024),('TrackSteel',(.13,.12,.10),.78,.68,'rusty_metal_03',512),('Rubber',(.026,.025,.023),.03,.94,'metal_plate',512),('Weapons',(.11,.12,.115),.82,.43,'metal_plate',512),('Rust',(.19,.085,.047),.50,.79,'rusty_metal_03',512),('Interior',(.018,.02,.018),.1,.91,'metal_plate',512),('Lamps',(.65,.56,.37),.3,.32,'metal_plate',512),('Burnt',(.075,.07,.064),.35,.94,'rusty_metal_03',512),('Scars',(.31,.29,.25),.8,.63,'rusty_metal_03',512)]:make_mat(*args) MATLIST=list(MATS.values());MI={m.name:i for i,m in enumerate(MATLIST)} # Batched parametric geometry. Separate rigid/moving assemblies preserve pivots. CACHE={} def box_template(size,bev): key=(tuple(round(x,5) for x in size),round(bev,5)) if key in CACHE:return CACHE[key] bm=bmesh.new();bmesh.ops.create_cube(bm,size=1) for v in bm.verts:v.co.x*=size[0];v.co.y*=size[1];v.co.z*=size[2] if bev:bmesh.ops.bevel(bm,geom=list(bm.edges),offset=bev,segments=2,affect='EDGES',clamp_overlap=True) bm.verts.ensure_lookup_table();bm.verts.index_update();v=[tuple(v.co) for v in bm.verts];f=[[v.index for v in p.verts] for p in bm.faces];bm.free();CACHE[key]=(v,f);return v,f class Build: def __init__(self):self.v=[];self.f=[];self.mi=[];self.smooth=[];self.uv=[] def add(self,verts,faces,mat='Paint',smooth=False,uv=None): off=len(self.v);self.v.extend([tuple(v) for v in verts]);self.f.extend([[off+i for i in f] for f in faces]);self.mi.extend([MI[mat]]*len(faces));self.smooth.extend([smooth]*len(faces));self.uv.extend(uv if uv else [None]*len(faces)) def box(self,c,d,mat='Paint',bev=.009,rot=None): v,f=box_template(d,bev);R=rot or Matrix.Identity(3);self.add([R@Vector(p)+Vector(c) for p in v],f,mat) def cyl(self,a,b,r,mat='Weapons',n=16,r2=None): a,b=Vector(a),Vector(b);q=(b-a).to_track_quat('Z','Y');r2=r if r2 is None else r2 verts=[a+q@Vector((r*cos(2*pi*i/n),r*sin(2*pi*i/n),0)) for i in range(n)]+[b+q@Vector((r2*cos(2*pi*i/n),r2*sin(2*pi*i/n),0)) for i in range(n)] fs=[list(reversed(range(n))),list(range(n,2*n))]+[[i,(i+1)%n,(i+1)%n+n,i+n] for i in range(n)];self.add(verts,fs,mat,True) def rivet(self,p,normal,r=.021,mat='Paint'): p=Vector(p);q=Vector(normal).to_track_quat('Z','Y');n=8 vv=[p+q@Vector((r*cos(i*2*pi/n),r*sin(i*2*pi/n),.001)) for i in range(n)] vv += [p+q@Vector((r*.78*cos(i*2*pi/n),r*.78*sin(i*2*pi/n),r*.65)) for i in range(n)] vv += [p+q@Vector((0,0,r*.88))] ff=[[i,(i+1)%n,(i+1)%n+n,i+n] for i in range(n)]+[[i+n,(i+1)%n+n,2*n] for i in range(n)];self.add(vv,ff,mat,True) def tube(self,points,r,mat='Rust',n=12): points=[Vector(p) for p in points] if len(points)>3 and r>.04: src=points;points=[] for k in range(len(src)-1): p0=src[max(k-1,0)];p1=src[k];p2=src[k+1];p3=src[min(k+2,len(src)-1)] for j in range(5): t=j/5;points.append(.5*((2*p1)+(-p0+p2)*t+(2*p0-5*p1+4*p2-p3)*t*t+(-p0+3*p1-3*p2+p3)*t*t*t)) points.append(src[-1]) vv=[] for i,p in enumerate(points): tangent=points[min(i+1,len(points)-1)]-points[max(0,i-1)];q=tangent.to_track_quat('Z','Y') vv += [p+q@Vector((r*cos(j*2*pi/n),r*sin(j*2*pi/n),0)) for j in range(n)] ff=[] for i in range(len(points)-1): for j in range(n):ff.append([i*n+j,i*n+(j+1)%n,(i+1)*n+(j+1)%n,(i+1)*n+j]) ff += [list(reversed(range(n))),list(range((len(points)-1)*n,len(points)*n))];self.add(vv,ff,mat,True) def torus(self,c,major,minor,axis=(1,0,0),mat='TrackSteel',n=24,k=6): q=Vector(axis).to_track_quat('Z','Y');vv=[] for i in range(n): for j in range(k): a=i*2*pi/n;b=j*2*pi/k;vv.append(Vector(c)+q@Vector(((major+minor*cos(b))*cos(a),(major+minor*cos(b))*sin(a),minor*sin(b)))) self.add(vv,[[i*k+j,((i+1)%n)*k+j,((i+1)%n)*k+(j+1)%k,i*k+(j+1)%k] for i in range(n) for j in range(k)],mat,True) def plate(self,points,thick=.035,mat='Paint'): ps=[Vector(p) for p in points];normal=(ps[1]-ps[0]).cross(ps[2]-ps[0]).normalized();n=len(ps) vv=[p+normal*thick*.5 for p in ps]+[p-normal*thick*.5 for p in ps];ff=[list(range(n)),list(reversed(range(n,2*n)))]+[[i,(i+1)%n,(i+1)%n+n,i+n] for i in range(n)] bm=bmesh.new();verts=[bm.verts.new(v) for v in vv] for face in ff:bm.faces.new([verts[i] for i in face]) bmesh.ops.recalc_face_normals(bm,faces=list(bm.faces));bmesh.ops.bevel(bm,geom=list(bm.edges),offset=min(.004,thick*.2),segments=2,affect='EDGES',clamp_overlap=True) bm.verts.ensure_lookup_table();bm.verts.index_update();self.add([v.co.copy() for v in bm.verts],[[v.index for v in f.verts] for f in bm.faces],mat);bm.free() def object(self,name,pivot=(0,0,0)): me=bpy.data.meshes.new(name);me.from_pydata([scaled(Vector(p)-Vector(pivot)) for p in self.v],[],self.f);me.update() ob=bpy.data.objects.new(name,me);S.collection.objects.link(ob);ob.location=scaled(pivot) for m in MATLIST:me.materials.append(m) uv=me.uv_layers.new(name='UVMap') for poly,mi,sm,custom in zip(me.polygons,self.mi,self.smooth,self.uv): poly.material_index=mi;poly.use_smooth=sm normal=poly.normal;axis=max(range(3),key=lambda i:abs(normal[i])) for j,li in enumerate(poly.loop_indices): v=Vector(self.v[me.loops[li].vertex_index]) if custom:coord=custom[j] elif axis==0:coord=(v.y*.48,(v.z-.58)/2.25 if v.z<2.80 else .30+(v.z-2.77)*.9) elif axis==1:coord=(v.x*.48,(v.z-.58)/2.25 if v.z<2.80 else .30+(v.z-2.77)*.9) else:coord=(v.x*.48,v.y*.48) uv.data[li].uv=coord return ob def empty(name,p,parent=None): o=bpy.data.objects.new(name,None);S.collection.objects.link(o);o.location=scaled(p) if parent:parent_keep(o,parent) return o def parent_keep(o,p): bpy.context.view_layer.update();mw=o.matrix_world.copy();o.parent=p;o.matrix_world=mw def origin_center(o): if o.type!='MESH':return c=sum((v.co for v in o.data.vertices),Vector())/len(o.data.vertices);o.data.transform(Matrix.Translation(-c));o.location+=c return o H=Build();parts=[];healthy=[];wheels=[];hatches=[] def part(b,name,pivot=None): o=b.object('Part_'+name,pivot or (0,0,0)) if pivot is None:origin_center(o) parts.append(o);return o # Armour: lower edge flares outward, upper shoulders taper inward. def sx(z):return 1.48-(z-.65)*.10 # Main side plate strips with actual seam gaps over a complete interior underlayer. sideYs=[-3.27,-2.23,-1.08,.02,1.10,2.22,3.27] def roof(y):return 2.77-.065*max(0,abs(y)-.55) for s in [-1,1]: H.plate([(s*(sx(1.10)-.06),-3.28,1.10),(s*(sx(1.10)-.06),3.28,1.10),(s*(sx(2.60)-.06),3.18,2.60),(s*(sx(2.60)-.06),-3.18,2.60)],.055) H.box((s*.80,0,.82),(.13,6.1,.52),'TrackSteel',.018) for j,(a,b) in enumerate(zip(sideYs,sideYs[1:])): # fitted upper panels and six detachable lower plates per side za,zb=roof(a),roof(b) H.plate([(s*(sx(1.10)+.009),a+.004,1.10),(s*(sx(1.10)+.009),b-.004,1.10),(s*(sx(zb)+.009),b-.004,zb),(s*(sx(za)+.009),a+.004,za)],.035) B=Build();B.plate([(s*(sx(.64)+.018),a+.008,.64),(s*(sx(.64)+.018),b-.008,.64),(s*(sx(1.11)+.022),b-.008,1.11),(s*(sx(1.11)+.022),a+.008,1.11)],.04) for yy in [a+.11,b-.11]: for zz in [.74,1.01]:B.rivet((s*(sx(zz)+.047),yy,zz),(s,0,.1),.022) part(B,f'Skirt_{"L" if s>0 else "R"}{j+1}') for yy in [a+.055,b-.055]: for k in range(11): z=1.14+k*(min(za,zb)-1.23)/10;H.rivet((s*(sx(z)+.027),yy,z),(s,0,.10),.019) for k in range(7): yy=a+.13+(b-a-.26)*k/6;z=roof(yy)-.075;H.rivet((s*(sx(z)+.023),yy,z),(s,0,.1),.019) # exposed mounting bosses remain underneath detachable skirts for yy in [a+.16,b-.16]:H.box((s*(sx(.99)+.02),yy,.99),(.075,.09,.105),'Weapons',.01) # Small random abrasions expose steel; localised near seams rather than blanket noise. for sg in [-1,1]: for i in range(95): yy=random.uniform(-3.0,3.0);zz=random.uniform(1.17,2.50);length=random.uniform(.025,.095);xx=sg*(sx(zz)+.0285) H.add([(xx,yy,zz),(xx,yy+.006,zz+.006),(sg*(sx(zz+length)+.0285),yy+.013,zz+length)],[[0,1,2]],'Weapons') # floor and longitudinal chassis H.box((0,0,.59),(2.66,6.50,.18),'TrackSteel',.035) for x in [-1.05,1.05]:H.box((x,0,.46),(.16,5.9,.24),'TrackSteel',.018) # End slopes: fronts are leaning inward; nose gun fixed recess and raised mantlet. for end in [-1,1]: ybot=end*3.38;ytop=end*3.12 for sg in [-1,1]:H.plate([(sg*sx(.64),end*3.28,.64),(sg*1.48,end*3.38,.68),(sg*1.275,end*3.12,2.60),(sg*sx(2.60),end*3.27,2.60)],.035) # complete face; 57mm socket raised on a dark circular seating H.plate([(-1.48,ybot,.68),(1.48,ybot,.68),(1.275,ytop,2.60),(-1.275,ytop,2.60)],.06) for x in [-1.36,-.87,0,.87,1.36]: for k in range(12): z=.79+k*.15;yy=end*(3.38-(z-.68)*.26/1.92);xx=x*(1-(z-.68)*.06) H.rivet((xx,yy+end*.040,z),(0,end,.14),.021) for z in [.78,2.51]: for i in range(17): x=-1.21+i*2.42/16;yy=end*(3.38-(z-.68)*.26/1.92);H.rivet((x,yy+end*.040,z),(0,end,.14),.021) # lower folded prow triangles give the distinctive central upsweep for s in [-1,1]: H.plate([(0,end*3.418,1.05),(s*1.47,end*3.418,.65),(s*1.47,end*3.418,.60),(0,end*3.418,.60)],.035,'TrackSteel') B=Build();B.box((s*1.36,end*3.25,.70),(.21,.41,.075),'Paint',.014);B.box((s*1.43,end*3.34,.58),(.06,.17,.27),'Paint',.013);part(B,f'Fender_{"F" if end<0 else "R"}{"L" if s>0 else "R"}') B=Build();B.torus((s*1.01,end*3.38,.93),.092,.025,axis=(1,0,0),mat='Weapons',n=20,k=6);B.box((s*1.01,end*3.32,.94),(.07,.15,.23),'Paint',.01);part(B,f'Tow_{"Front" if end<0 else "Rear"}_{s}') # Roof fore/aft sloped armour; cab base sits in centre. for a,b in [(-3.12,-.74),(.74,3.12)]: H.plate([(-sx(roof(a)),a,roof(a)),(sx(roof(a)),a,roof(a)),(sx(roof(b)),b,roof(b)),(-sx(roof(b)),b,roof(b))],.05) for yy in [a+.055,b-.055]: for i in range(17):H.rivet((-1.17+i*.146,yy,roof(yy)+.018),(0,0,1),.019) for x in [-1.05,1.05]:H.box((x,0,2.74),(.42,1.55,.075),'Paint',.012) # Engine deck grilles: separate louvres above solid dark fins and lined engine well. for yy,label in [(-2.05,'Front'),(2.05,'Rear')]: slope=math.atan(.065 if yy<0 else -.065); rr=Matrix.Rotation(slope,3,'X') H.box((0,yy,roof(yy)+.006),(1.84,1.30,.045),'Interior',.015,rr) for k in range(15):H.box((-.80+k*.114,yy,roof(yy)+.030),(.032,1.18,.014),'Weapons',.003,rr) B=Build() for x in [-.91,.91]:B.box((x,yy,roof(yy)+.0425),(.045,1.36,.035),'Paint',.007,rr) for y in [yy-.67,yy+.67]:B.box((0,y,roof(y)+.0425),(1.86,.045,.035),'Paint',.007) for x in [-.62,0,.62]: for j in range(12):B.box((x,yy-.59+j*.108,roof(yy-.59+j*.108)+.0435),(.56,.058,.017),'Paint',.005,rr) for x in [-.90,.90]: for y in [yy-.60,yy+.60]:B.rivet((x,y,roof(y)+.061),(0,0,1),.022) part(B,'Grille_'+label) # Cab: tapered square at roof centre, real recessed windows in surrounding armour. # cab lower dimensions 1.66 x 1.50, top 1.46 x 1.28, top z3.28. for end in [-1,1]: # face assembled around two deep vision ports, with sloped cheeks yy=end*.73 H.box((0,end*.725,2.85),(1.65,.085,.16),'Paint',.01,Matrix.Rotation(end*.17,3,'X')) H.box((0,end*.652,3.235),(1.46,.085,.075),'Paint',.01) for x in [-.71,0,.71]:H.box((x, end*.69,3.05),(.15,.11,.35),'Paint',.012,Matrix.Rotation(end*.17,3,'X')) for x in [-.36,.36]: H.box((x,end*.645,3.07),(.51,.085,.23),'Interior',.014) # closeable armoured flap sits above a dark slit B=Build();B.box((x,end*.73,3.16),(.51,.055,.16),'Paint',.009,Matrix.Rotation(end*.13,3,'X'));B.cyl((x-.27,end*.75,3.25),(x+.27,end*.75,3.25),.022,'Weapons',12) for xx in [x-.20,x+.20]:B.rivet((xx,end*.77,3.18),(0,end,0),.017) part(B,f'CabFlap_{"Front" if end<0 else "Rear"}_{"L" if x>0 else "R"}') for s in [-1,1]: H.plate([(s*.83,-.74,2.77),(s*.83,.74,2.77),(s*.73,.65,3.28),(s*.73,-.65,3.28)],.04) B=Build();B.box((s*.795,0,3.065),(.052,.45,.255),'Paint',.012);B.box((s*.833,0,3.08),(.035,.32,.035),'Weapons',.006) for yy in [-.17,.17]:B.cyl((s*.832,yy,2.99),(s*.832,yy,3.17),.022,'Weapons',10) part(B,'CabFlap_'+('L' if s>0 else 'R')) for yy in [-.66,.66]: for z in [2.83,2.94,3.05,3.17]:H.rivet((s*(.83-(z-2.77)*.196+.015),yy,z),(s,0,.2),.018) # cab roof has actual hatch aperture and deep dark crew well. for x in [-.60,.60]:H.box((x,0,3.27),(.25,1.31,.05),'Paint',.008) for y in [-.56,.56]:H.box((0,y,3.27),(1.0,.20,.05),'Paint',.008) H.box((0,0,2.69),(1.20,1.15,.08),'Interior',.009) for x in [-.48,.48]:H.box((x,0,3.015),(.05,.90,.47),'Interior',.004) for y in [-.44,.44]:H.box((0,y,3.015),(1.0,.05,.47),'Interior',.004) B=Build();B.box((0,0,3.285),(.95,.88,.030),'Paint',.012) for x in [-.30,.30]:B.cyl((x,.42,3.27),(x+.12,.42,3.27),.025,'Weapons',12) B.tube([(-.12,-.03,3.28),(-.12,-.03,3.29),(.12,-.03,3.29),(.12,-.03,3.28)],.010,'Weapons',8) hatches.append(B.object('Hatch_Commander',(0,.42,3.27))) # two side access doors, with hinges and handle, detached door plates sit on full framed backing. for s in [-1,1]: yy=-2.17;z=1.80;x=s*(sx(z)+.048) H.box((x-s*.016,yy,z),(.045,.67,1.02),'Paint',.025) for dy in [-.285,.285]: for dz in [-.44,.44]:H.rivet((x+s*.008,yy+dy,z+dz),(s,0,0),.018,'Weapons') B=Build();B.box((x+s*.03,yy,z),(.06,.61,.95),'Paint',.038) for zz in [1.46,2.12]: B.box((x+s*.072,yy-.25,zz),(.04,.13,.09),'Paint',.009);B.cyl((x+s*.093,yy-.28,zz-.065),(x+s*.093,yy-.28,zz+.065),.024,'Weapons',12) B.tube([(x+s*.08,yy+.19,1.7),(x+s*.13,yy+.19,1.7),(x+s*.13,yy+.19,1.91),(x+s*.08,yy+.19,1.91)],.016,'Weapons',8) part(B,'Door_'+('L' if s>0 else 'R')) # Long muffler + swept inlet elbow and outlet; proper fixing bands and mounts. B=Build();xx=s*1.50 pts=[(s*1.41,-.73,1.03),(xx,-.48,1.07),(xx,-.25,1.26),(xx,.05,1.38),(xx,.26,1.40)] B.tube(pts,.068,'Rust',14);B.cyl((xx,.18,1.4),(xx,1.50,1.4),.105,'Rust',20) B.tube([(xx,1.50,1.4),(xx,1.66,1.39),(xx,1.84,1.31),(s*1.45,1.94,1.27)],.068,'Rust',14) for y in [.26,1.42]: B.cyl((xx,y-.025,1.4),(xx,y+.025,1.4),.117,'Weapons',18);H.box((s*1.42,y,1.42),(.13,.095,.28),'Paint',.01) part(B,'Exhaust_'+('L' if s>0 else 'R')) # Gun trunnion / armoured ball, with barrel as a genuine child. G=Build();G.box((0,-3.22,1.93),(.69,.20,.67),'Paint',.036) G.cyl((0,-3.27,1.93),(0,-3.46,1.93),.265,'Weapons',32,r2=.23) G.cyl((0,-3.38,1.93),(0,-3.51,1.93),.166,'Paint',24) gun=G.object('Gun',(0,-3.27,1.93));gun['yaw_axis']='Y';gun['yaw_limits_degrees']=[-25,25];gun['elevation_axis']='X' B=Build();B.cyl((0,-3.45,1.93),(0,-3.66,1.93),.108,'Weapons',24,r2=.091);B.cyl((0,-3.64,1.93),(0,-4.25,1.93),.072,'Weapons',24,r2=.065) # muzzle visible annulus + dark bore, not capped silver rod B.torus((0,-4.248,1.93),.049,.014,axis=(0,1,0),mat='Weapons',n=24,k=6);B.cyl((0,-4.245,1.93),(0,-4.249,1.93),.035,'Interior',20) barrel=B.object('Barrel',(0,-3.43,1.93));parent_keep(barrel,gun);empty('Muzzle',(0,-4.265,1.93),barrel) # Driver and loader visors are articulated armour with dark crew spaces behind. for x,label in [(-.91,'Loader'),(.91,'Driver')]: H.box((x,-3.267,2.08),(.40,.10,.22),'Interior',.016) B=Build();B.box((x,-3.342,2.12),(.43,.075,.16),'Paint',.014);B.box((x,-3.385,2.10),(.30,.018,.027),'Interior',.004);B.cyl((x-.24,-3.31,2.21),(x+.24,-3.31,2.21),.021,'Weapons',12) hatches.append(B.object('Hatch_'+label,(x,-3.31,2.21))) # Three side machineguns each, two aft. Water-cooled jackets and small muzzle detail. mg_count=0 for s in [1,-1]: for yy in [-1.20,.48,2.26]: z=2.14;xx=s*(sx(z)+.065);H.box((xx,yy,z),(.065,.35,.33),'Interior',.012) for yedge in [yy-.19,yy+.19]:H.box((xx+s*.025,yedge,z),(.045,.035,.39),'Paint',.007) B=Build();B.cyl((xx,yy,z),(xx+s*.10,yy,z),.12,'Weapons',16,r2=.09);B.cyl((xx+s*.07,yy,z),(xx+s*.40,yy,z),.044,'Weapons',16);B.cyl((xx+s*.39,yy,z),(xx+s*.50,yy,z),.026,'Weapons',12) for dd in [.13,.35]:B.cyl((xx+s*(dd-.012),yy,z),(xx+s*(dd+.012),yy,z),.050,'Weapons',16) B.cyl((xx+s*.496,yy,z),(xx+s*.501,yy,z),.013,'Interior',12) mg_count+=1;B.object('MG_'+str(mg_count),(xx,yy,z)) for x in [-.70,.70]: yy=3.205;z=2.13;H.box((x,yy,z),(.31,.10,.31),'Interior',.013) B=Build();B.cyl((x,yy,z),(x,yy+.12,z),.10,'Weapons',16);B.cyl((x,yy+.10,z),(x,yy+.46,z),.044,'Weapons',16);B.cyl((x,yy+.45,z),(x,yy+.53,z),.023,'Weapons',12) mg_count+=1;B.object('MG_'+str(mg_count),(x,yy,z)) # Running gear: roadwheel bogies, idlers/sprockets, upper return rollers. for s,side in [(1,'L'),(-1,'R')]: x=s*1.12 ys=[-2.84]+[-2.20+i*.44 for i in range(11)]+[2.84] for idx,y in enumerate(ys): r=.31 if idx in [0,12] else .235;z=.43 if idx in [0,12] else .31 B=Build();B.cyl((x-s*.22,y,z),(x+s*.22,y,z),r,'TrackSteel',24) for sideOff in [-.205,.205]:B.torus((x+sideOff,y,z),r-.035,.031,axis=(1,0,0),mat='Weapons',n=24,k=6) B.cyl((x+s*.22,y,z),(x+s*.248,y,z),r*.64,'TrackSteel',24);B.cyl((x+s*.248,y,z),(x+s*.28,y,z),r*.25,'Weapons',16) for a in range(6):B.rivet((x+s*.269,y+cos(a*pi/3)*r*.43,z+sin(a*pi/3)*r*.43),(s,0,0),.013,'Weapons') if idx in [0,12]: for a in range(16): aa=a*2*pi/16;B.box((x,y+cos(aa)*r,z+sin(aa)*r),(.30,.065,.060),'TrackSteel',.007,Matrix.Rotation(aa,3,'X')) wheels.append(B.object(f'Wheel_{side}{idx+1}',(x,y,z))) # three leaf sprung bogie assemblies for y in [-1.76,0,1.76]: H.box((x+s*.12,y,.42),(.13,1.35,.13),'TrackSteel',.015) for a in range(32): a0=a*2*pi/32;a1=(a+1)*2*pi/32 H.cyl((x+s*.29,y+.66*cos(a0),.35+.20*sin(a0)),(x+s*.29,y+.66*cos(a1),.35+.20*sin(a1)),.027,'TrackSteel',8) for off in [-.37,0,.37]: H.box((x+s*.28,y+off,.35),(.075,.20,.25),'TrackSteel',.019) H.box((x+s*.327,y+off,.39),(.033,.13,.115),'Weapons',.009) H.rivet((x+s*.35,y+off,.38),(s,0,0),.026,'TrackSteel') for k in range(4):H.box((x+s*.12,y,.52+k*.018),(.12,1.00-k*.14,.017),'TrackSteel',.004) for yy in [y-.43,y+.43]:H.cyl((x+s*.12,yy,.35),(x+s*.12,yy,.67),.047,'Weapons',12) for i,y in enumerate([-2.10,-.70,.70,2.10]): B=Build();B.cyl((x-.19,y,.80),(x+.19,y,.80),.13,'TrackSteel',20);B.cyl((x+s*.19,y,.80),(x+s*.23,y,.80),.065,'Weapons',16);wheels.append(B.object(f'Wheel_{side}{14+i}',(x,y,.80))) # All wheel nodes, including return rollers, are numbered front to back. for side in ['L','R']: ordered=sorted([o for o in wheels if o.name.startswith('Wheel_'+side)],key=lambda o:o.location.y) for i,o in enumerate(ordered):o.name=f'_wheel_sort_{side}_{i}' for i,o in enumerate(ordered):o.name=f'Wheel_{side}{i+1}' # Continuous track path, rectangular pads individually bevelled. UV V advances exactly once around loop. # radius .40, straight length 5.56 => zmin=0 (pad thickness .07) TRACK_N=104 track_nodes={};track_segments={} def track_pt(t): r=.40;half=2.78;per=4*half+2*pi*r;d=(t%1)*per if d<2*half:return (-half+d,.0535,0) d-=2*half if d0 else 'R')) hull=H.object('Hull') for name,loc in [('Seat_Commander',(0,0,3.30)),('Seat_Driver',(.6,-2.6,2.0)),('Exhaust',(1.50,1.94,1.27)),('Light_Head_L',(1.10,-3.28,1.45)),('Light_Head_R',(-1.10,-3.28,1.45)),('Fx_Engine',(0,1.8,2.68)),('Fx_Ammo',(0,.8,1.2)),('Fx_Hatch',(0,0,3.30))]:empty(name,loc) healthy=list(S.objects) # Drop unused material slots so glTF exports only the materials used by each mesh. def prune(o): if o.type!='MESH':return bm=bmesh.new();bm.from_mesh(o.data);bmesh.ops.triangulate(bm,faces=list(bm.faces));bad=[f for f in bm.faces if f.calc_area()<1e-10] if bad:bmesh.ops.delete(bm,geom=bad,context='FACES') bm.to_mesh(o.data);bm.free() slots=list(o.data.materials);used=sorted(set(p.material_index for p in o.data.polygons));mapping={old:i for i,old in enumerate(used)};indices=[mapping[p.material_index] for p in o.data.polygons];o.data.materials.clear() for j in used:o.data.materials.append(slots[j]) for p,i in zip(o.data.polygons,indices):p.material_index=i for o in healthy:prune(o) def triangles(obs):return sum(sum(len(p.vertices)-2 for p in o.data.polygons) for o in obs if o.type=='MESH') print('HEALTHY_TRIANGLES',triangles(healthy),flush=True) def export(obs,path): bpy.ops.object.select_all(action='DESELECT') for o in obs:o.hide_set(False);o.select_set(True) bpy.ops.export_scene.gltf(filepath=str(ROOT/path),export_format='GLB',use_selection=True,export_yup=True,export_apply=False,export_texcoords=True,export_normals=True,export_materials='EXPORT',export_image_format='AUTO',export_cameras=False,export_lights=False,export_extras=True) # Set canonical linear tint explicitly (exporter's multiply recognition varies across versions). p=ROOT/path;data=p.read_bytes();length,kind=struct.unpack_from('=0 else -1)*(.11*weight+.045*sin(co.z*24));co.z-=.09*weight bm.to_mesh(q.data);bm.free() # Damage material darkened steel at torn edges is represented by strips below. par=td if 'CabFlap' in o.name else hd;parent_keep(q,par);twins.append((o,q));damage.append(q) # Scar patches: disks sit 3mm above actual armour, metal petalled crater rims and black pits. scar_names=[] def scar_group(name,positions,normals): B=Build() for idx,(p,n) in enumerate(zip(positions,normals)): p=Vector(p);n=Vector(n).normalized();q=n.to_track_quat('Z','Y');r=.043 if idx else .083 # asymmetric soot halo as a thin irregular disk count=16;vv=[p+n*.0025] for i in range(count): a=2*pi*i/count;rad=r*(1.5+.30*sin(i*4.2));vv.append(p+q@Vector((rad*cos(a),rad*sin(a),.003))) B.add(vv,[[0,i+1,(i+1)%count+1] for i in range(count)],'Burnt') # open rim with black interior inset; raised petals catch glancing light vv=[] for ring in [0,1,2]: for i in range(count): a=2*pi*i/count;rr=r*[1,.57,.44][ring];zz=[.003,.007+(.008 if idx==0 else .004)*(1+sin(i*3)),.004][ring];vv.append(p+q@Vector((rr*cos(a),rr*sin(a),zz))) B.add(vv,[[ring*count+i,ring*count+(i+1)%count,(ring+1)*count+(i+1)%count,(ring+1)*count+i] for ring in [0,1] for i in range(count)],'Scars') B.cyl(p+n*.003,p+n*.004,r*.45,'Interior',16) if idx>0: B.tube([p+q@Vector((r*.7,0,.004)),p+q@Vector((r*1.9,r*.3,.004)),p+q@Vector((r*2.7,r*.6,.004))],.008,'Scars',6) ob=B.object(name);prune(ob);parent_keep(ob,td if 'Turret' in name else hd);damage.append(ob);scar_names.append(name) for s,side in [(1,'L'),(-1,'R')]: poses=[] for yy,zz in [(-1.65,1.70),(-.50,2.30),(1.30,1.85),(2.7,2.2)]:poses.append((s*(sx(zz)+.0265),yy,zz)) scar_group('Scar_Hull_'+side,poses,[(s,0,.1)]*4) for end,label in [(-1,'Front'),(1,'Rear')]: positions=[] for xx,zz in [(-.54,1.45),(.62,1.82),(.23,2.44),(-1.0,1.23)]:positions.append((xx,end*(3.38-(zz-.68)*.26/1.92+.030),zz)) scar_group('Scar_Hull_'+label,positions,[(0,end,.14)]*4) for s,label in [(1,'L'),(-1,'R')]:scar_group('Scar_Turret_'+label,[(s*(.83-(z-2.77)*(.1/.51)+.019626),y,z) for y,z in [(-.40,3.04),(.40,3.02),(.54,3.12)]],[(s,0,.2)]*3) for end,label in [(-1,'Front'),(1,'Rear')]:scar_group('Scar_Turret_'+label,[(x,end*.76469,2.87) for x in [-.5,0,.5]],[(0,end,.1)]*3) # Broken gun combines original mount with a bent, split barrel at the same pivot. q=clone(gun,'Gun_Broken');pieces=[q] bb=clone(barrel,'broken_barrel_temp') for v in bb.data.vertices: world=bb.matrix_world@v.co if world.y<-3.66: d=-3.66-world.y;world.z-=.75*d;world.x+=.05*sin(d*8) if d>.22:world.x+=.045*sin(v.index*2.3);world.z+=.04*cos(v.index*2.1) v.co=bb.matrix_world.inverted()@world pieces.append(bb) bpy.ops.object.select_all(action='DESELECT') for o in pieces:o.select_set(True) bpy.context.view_layer.objects.active=q;bpy.ops.object.join();parent_keep(q,td);damage.append(q) # Snapped/derailed track copies: unlink a front arc; upper run sags and loose front links lie on ground. for side in ['L','R']: orig=track_nodes[side];q=clone(orig,'Track_'+side+'_Broken') for i,(sv,ev,x,y,z,angle) in enumerate(track_segments[side]): t=i/TRACK_N;newy,newz,newangle=y,z,angle;newx=x if t>.90: newy=-2.82-(t-.90)*14;newz=.0345;newangle=pi elif t>.50: u=(t-.50)/.40;newz=.8535-.40*sin(u*pi*.85)-.57*max(0,(u-.75)/.25);newz=max(.065,newz);newx+=.17*sin(u*pi)*(1 if side=='L' else -1);newangle=pi+.18*sin(u*pi*2) oldR=Matrix.Rotation(angle,3,'X');newR=Matrix.Rotation(newangle,3,'X') for vi in range(sv,ev): v=q.data.vertices[vi];raw=Vector((v.co.x/DIM.x,v.co.y/DIM.y,v.co.z));loc=oldR.transposed()@(raw-Vector((x,y,z)));v.co=scaled(newR@loc+Vector((newx,newy,newz))) parent_keep(q,hd);damage.append(q) # Wreck: complete burnt hull, suspension sagged; cab roof blown open; no turret on this type. wreckpieces=[] omit={'Part_Skirt_L2','Part_Skirt_L3','Part_Skirt_R4','Part_Grille_Rear','Part_CabFlap_Front_L','Part_CabFlap_Rear_R'} for o in healthy: if o.type!='MESH' or o.name in omit or o.name=='Barrel' or o.name=='Gun':continue if o.name.startswith('Track_'): if o.name=='Track_L':src=next(q for q in damage if q.name=='Track_L_Broken') else:src=o else:src=o q=clone(src,'wreck_'+o.name) if o.name.startswith('Hatch_'): q.rotation_euler.rotate_axis('X',-1.2 if o.name=='Hatch_Commander' else 1.2) if o.name.startswith('Wheel_'):q.location.z-=.05 if o.name=='Part_Grille_Front':q.rotation_euler.x=.24;q.location.z+=.16 if o.name.startswith('Part_CabFlap'):q.rotation_euler.y=.72;q.location.z+=.13 if o.name=='Part_Door_L':q.rotation_euler.z=.65;q.location.x+=.14 if o.name=='Hull': bm=bmesh.new();bm.from_mesh(q.data);bad=[f for f in bm.faces if f.calc_center_median().y>1.00 and 2.48.85] bmesh.ops.delete(bm,geom=bad,context='FACES');bm.to_mesh(q.data);bm.free() for v in q.data.vertices: if v.co.z>3.22:v.co.z+=.18*sin(v.co.y*10)+.08;v.co.x*=1.12 if v.co.z>2.79 and v.co.x>.60:v.co.x+=.25*(v.co.z-2.79)/.5 for v in q.data.vertices: if v.co.z>.65:v.co.x+=.006*sin(v.co.z*17+v.co.y*11) q.data.materials.clear();q.data.materials.append(MATS['Burnt']) for p in q.data.polygons:p.material_index=0 wreckpieces.append(q) B=Build() # Jagged displaced engine-deck plates surround a dark engine cavity. B.box((0,1.95,2.05),(1.9,1.9,.15),'Burnt',.015) for sg in [-1,1]: B.plate([(sg*.15,.95,2.69),(sg*1.1,1.05,2.68),(sg*1.15,2.75,2.62),(sg*.37,2.35,3.03),(sg*.58,1.95,2.93),(sg*.22,1.5,3.13)],.032,'Burnt') q=B.object('wreck_torn_deck');wreckpieces.append(q) q=clone(next(o for o in damage if o.name=='Gun_Broken'),'wreck_gun');q.parent=None;q.data.materials.clear();q.data.materials.append(MATS['Burnt']) for p in q.data.polygons:p.material_index=0 wreckpieces.append(q) bpy.ops.object.select_all(action='DESELECT') for o in wreckpieces:o.select_set(True) bpy.context.view_layer.objects.active=wreckpieces[0];bpy.ops.object.join();wreck=bpy.context.object;wreck.name='Wreck_Hull' # Move origin to ground centre without touching the mesh placement. mw=wreck.matrix_world.copy();wreck.data.transform(mw);wreck.matrix_world=Matrix.Identity(4) mod=wreck.modifiers.new('Wreck simplification','DECIMATE');mod.ratio=.44;bpy.context.view_layer.objects.active=wreck;bpy.ops.object.modifier_apply(modifier=mod.name) damage.append(wreck) # Damage materials conform to five-bucket contract, shared Paint preserved. for o in damage: if o.type!='MESH':continue for i,m in enumerate(o.data.materials): if m.name in ['Weapons','Rust']:o.data.materials[i]=MATS['TrackSteel'] elif m.name in ['Interior','Lamps']:o.data.materials[i]=MATS['Burnt'] prune(o) print('DAMAGE_TRIANGLES',triangles(damage),flush=True) export(damage,'a7v-tank-damage.glb') # Metadata uses glTF axes, node pivots (world) and actual transformed bounds. def xyz(v):return [round(v.x,5),round(v.z,5),round(-v.y,5)] def manifest(obs): bpy.context.view_layer.update();nodes=[];points=[] for o in obs: nodes.append({'name':o.name,'position':xyz(o.matrix_world.translation),'parent':o.parent.name if o.parent else None,'triangles':sum(len(p.vertices)-2 for p in o.data.polygons) if o.type=='MESH' else 0}) if o.type=='MESH':points.extend([o.matrix_world@Vector(p) for p in o.bound_box]) pp=[xyz(p) for p in points] return {'nodes':nodes,'bounds':{'min':[min(p[i] for p in pp) for i in range(3)],'max':[max(p[i] for p in pp) for i in range(3)]},'triangles':triangles(obs)} meta={'contract':'tank-damage/v1','type':'A7V turretless','axes':{'forward':'+Z','up':'+Y','left':'+X'},'units':'metres','armour_dimensions_m':{'length':7.34,'width':3.07,'height':3.30},'files':{'a7v-tank.glb':manifest(healthy),'a7v-tank-damage.glb':manifest(damage)},'paints':[{'name':name,'linear_rgb':col} for name,col in PAINTS],'damage':{'parts':[{'part':p.name,'twin':next((q.name for o,q in twins if o==p),None)} for p in parts],'scars':scar_names,'broken':{'Track_L':'Track_L_Broken','Track_R':'Track_R_Broken','Gun':'Gun_Broken'},'wreck':['Wreck_Hull'],'turretless':True},'rig':{'Gun':{'yaw_axis':'Y','yaw_degrees':[-25,25],'elevation_axis':'X'},'Barrel':{'recoil_axis':'Z'},'wheels':{'axis':'X'},'track_uv':'V runs once around the loop','machine_guns':8,'turret':None},'bakes':BAKES} (ROOT/'nodes.json').write_text(json.dumps(meta,indent=2)) # Save source scene then use clean glTF imports for all delivery render proofs. bpy.ops.wm.save_as_mainfile(filepath=str(ROOT/'a7v-source.blend')) twin_names=[(o.name,q.name) for o,q in twins] for o in list(bpy.data.objects):bpy.data.objects.remove(o,do_unlink=True) oldgroup=bpy.data.node_groups.get('glTF Material Output') if oldgroup:oldgroup.name='Baked_Occlusion_Source' bpy.ops.import_scene.gltf(filepath=str(ROOT/'a7v-tank.glb'));A=list(S.objects) bpy.ops.import_scene.gltf(filepath=str(ROOT/'a7v-tank-damage.glb'));D=[o for o in S.objects if o not in A] # Exported material tint is the proof source. Names can be suffixed by the importer. paintmats=[m for m in bpy.data.materials if m.name.startswith('Paint') and m.users] # neutral studio floor and broad natural daylight floorMat=bpy.data.materials.new('Studio');floorMat.diffuse_color=(.18,.195,.19,1);floorMat.use_nodes=True;floorMat.node_tree.nodes.get('Principled BSDF').inputs['Base Color'].default_value=(.18,.195,.19,1);floorMat.node_tree.nodes.get('Principled BSDF').inputs['Roughness'].default_value=.87 bpy.ops.mesh.primitive_plane_add(size=200,location=(0,0,-.035));floor=bpy.context.object;floor.name='StudioFloor';floor.data.materials.append(floorMat) S.world=bpy.data.worlds.new('Soft daylight');S.world.use_nodes=True;S.world.node_tree.nodes['Background'].inputs[0].default_value=(.67,.74,.82,1);S.world.node_tree.nodes['Background'].inputs[1].default_value=.5 ld=bpy.data.lights.new('Daylight','AREA');lo=bpy.data.objects.new('Daylight',ld);S.collection.objects.link(lo);lo.location=(5,-6,9);ld.energy=2100;ld.shape='DISK';ld.size=7 lo.rotation_euler=(Vector((0,0,1.4))-lo.location).to_track_quat('-Z','Y').to_euler() ld=bpy.data.lights.new('Rim','AREA');lo=bpy.data.objects.new('Rim',ld);S.collection.objects.link(lo);lo.location=(-4,3,6);ld.energy=1400;ld.size=6;lo.rotation_euler=(Vector((0,0,1.4))-lo.location).to_track_quat('-Z','Y').to_euler() camd=bpy.data.cameras.new('Camera');cam=bpy.data.objects.new('Camera',camd);S.collection.objects.link(cam);S.camera=cam camd.type='ORTHO';camd.ortho_scale=10.6 CAM=(9,-12,7.2);TARGET=(0,-.20,1.45) def camera(pos=CAM,target=TARGET,scale=10.6):cam.location=pos;cam.rotation_euler=(Vector(target)-cam.location).to_track_quat('-Z','Y').to_euler();camd.ortho_scale=scale camera() def show(obs,val): for o in obs:o.hide_render=not val def render(name,w=1920,h=1080,samples=24): S.render.resolution_x=w;S.render.resolution_y=h;S.render.resolution_percentage=100;S.cycles.samples=samples;S.render.filepath=str(ROOT/name);bpy.ops.render.render(write_still=True) show(A,True);show(D,False) render('final.png') camera((10,0,1.65),(0,0,1.65),10.1);render('side.png',1920,1080,20) camera() clay=bpy.data.materials.new('ClayProof');clay.use_nodes=True;cp=clay.node_tree.nodes.get('Principled BSDF');cp.inputs['Base Color'].default_value=(.43,.43,.43,1);cp.inputs['Roughness'].default_value=.78 S.view_layers[0].material_override=clay;render('clay.png',1920,1080,16);S.view_layers[0].material_override=None # Mechanical pivot evidence: rotate every moving node 30 degrees in place; restore afterwards. moving=[o for o in A if o.name.startswith(('Wheel_','Hatch_','MG_')) or o.name in ['Gun','Barrel']] transforms={o.name:o.matrix_basis.copy() for o in moving} for o in moving: o.rotation_mode='XYZ';o.rotation_euler.rotate_axis('Z' if o.name=='Gun' or o.name.startswith('MG_') else 'X',-pi/6 if o.name=='Hatch_Commander' else pi/6) render('pivots.png',1280,720,12) for o in moving:o.matrix_basis=transforms[o.name] # Grid tiles are assembled via Blender image buffers, no external image package required. def grid(paths,out): tiles=[bpy.data.images.load(str(ROOT/p),check_existing=False) for p in paths];w,h=tiles[0].size canvas=np.ones((h*2,w*3,4),dtype=np.float32) for i,im in enumerate(tiles):canvas[(1-i//3)*h:(2-i//3)*h,(i%3)*w:(i%3+1)*w]=np.asarray(im.pixels[:],dtype=np.float32).reshape(h,w,4) im=bpy.data.images.new(out,w*3,h*2,alpha=True);im.pixels.foreach_set(canvas.ravel());im.filepath_raw=str(ROOT/out);im.file_format='PNG';im.save() for t in tiles:bpy.data.images.remove(t) labels=[name.upper() for name,col in PAINTS] if out=='paints.png' else ['01 HEALTHY','02 HIT / SIX PANEL SWAPS','03 STRIPPED','04 IMMOBILISED / GUN DISABLED','05 BURNT WRECK','06 TURRETLESS WRECK / NO SEPARATE TURRET'] code='from PIL import Image,ImageDraw,ImageFont; import sys,json; p=sys.argv[1]; src=Image.open(p).convert("RGB"); labels=json.loads(sys.argv[2]); font=ImageFont.truetype("/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf",14); w=src.width//3; h=src.height//2; im=Image.new("RGB",(w*3,(h+31)*2),(36,40,39)); d=ImageDraw.Draw(im); [(im.paste(src.crop((i%3*w,i//3*h,(i%3+1)*w,(i//3+1)*h)),(i%3*w,i//3*(h+31))),d.text((i%3*w+15,i//3*(h+31)+h+8),s,font=font,fill=(224,229,225))) for i,s in enumerate(labels)]; im.save(p)' subprocess.run(['python3','-c',code,str(ROOT/out),json.dumps(labels)],check=True) # recolour imported glTF materials via supported texture multiply sockets def recolour(rgb): for o in A: if o.type!='MESH':continue for m in o.data.materials: if not m.name.startswith('Paint'):continue nt=m.node_tree;p=next(n for n in nt.nodes if n.type=='BSDF_PRINCIPLED');sock=p.inputs['Base Color'] if sock.is_linked: node=sock.links[0].from_node if node.type=='MIX': # importer uses multiply Mix colour B at socket 7 node.inputs[7].default_value=(*rgb,1) elif node.type=='MIX_RGB':node.inputs[2].default_value=(*rgb,1) elif node.type=='TEX_IMAGE': tex=node;mul=nt.nodes.new('ShaderNodeMixRGB');mul.blend_type='MULTIPLY';mul.inputs[0].default_value=1;mul.inputs[2].default_value=(*rgb,1);nt.links.new(tex.outputs['Color'],mul.inputs[1]);nt.links.new(mul.outputs[0],sock) else:sock.default_value=(*rgb,1) for i,(name,rgb) in enumerate(PAINTS): recolour(rgb);render(f'paint-{i}.png',640,360,12) grid([f'paint-{i}.png' for i in range(6)],'paints.png');recolour(PAINTS[0][1]) # Render exactly the imported exported nodes, turning states on/off only. def named(name,objs):return next((o for o in objs if o.name==name or o.name.split('.')[0]==name),None) for state in range(6): show(A,state<4);show(D,False) if state==1: for n in scar_names: o=named(n,D) if o:o.hide_render=False for pn,qn in twin_names[:6]: named(pn,A).hide_render=True;named(qn,D).hide_render=False elif state==2: for o in A: if o.name.startswith('Part_'):o.hide_render=True elif state==3: named('Track_L',A).hide_render=True;named('Track_L_Broken',D).hide_render=False for n in ['Gun','Barrel']:named(n,A).hide_render=True named('Gun_Broken',D).hide_render=False elif state>=4:named('Wreck_Hull',D).hide_render=False # State 6 equals turretless wreck: deliberately no fictitious detachable turret. render(f'state-{state}.png',640,360,16) grid([f'state-{i}.png' for i in range(6)],'states.png') notes=[ 'WWI German A7V-style turretless heavy tank reconstructed from sheet.jpg; movable gun, eight MGs, hatches, wheels, removable fittings and aligned damage/wreck assets.', f'Triangles: healthy {meta["files"]["a7v-tank.glb"]["triangles"]:,}; damage {meta["files"]["a7v-tank-damage.glb"]["triangles"]:,}; uncompressed GLB meshes with metre units.', 'Materials: healthy Paint, TrackSteel, Weapons, Rust, Interior, Lamps; damage Paint, TrackSteel, Burnt, Scars; Paint neutral baked texture × linear field-grey factor [0.19,0.22,0.19].', 'Textures: shared Cycles OptiX baked base/normal 1024px Paint, 512px others; ORM 512px; proof renders use re-imported GLBs.', 'Poly Haven CC0 ids: metal_plate, rusty_metal_03; https://polyhaven.com/license ; source maps downloaded from dl.polyhaven.org.', 'Differences: eight MGs follow written brief; no turret or Wreck_Turret (sixth state repeats turretless wreck); dimensions include protruding weapons beyond the armour footprint; weathering is shared tiling, not a unique historical vehicle.' ] (ROOT/'NOTES.md').write_text('\n'.join(notes)+'\n') print('BUILD_COMPLETE',flush=True)