import bpy, math, random, os
from mathutils import Vector
from math import sin, cos, pi

from pathlib import Path
_here = Path(__file__).resolve().parent
ROOT = str(Path(os.environ.get('KORU_ROOT', _here.parent if _here.name == 'source' else _here / 'Koru-output')))
for _sub in ('renders','renders/v2','delivery','references','source'): Path(ROOT,_sub).mkdir(parents=True,exist_ok=True)
random.seed(42)
bpy.ops.object.select_all(action='SELECT')
bpy.ops.object.delete(use_global=False)
for d in bpy.data.materials: bpy.data.materials.remove(d)
scene = bpy.context.scene
scene.render.engine = 'BLENDER_EEVEE'
scene.render.resolution_x=1920; scene.render.resolution_y=1080
scene.render.resolution_percentage=100
scene.render.fps=24; scene.frame_start=1; scene.frame_end=288
scene.render.image_settings.file_format='PNG'
scene.render.film_transparent=False
scene.render.filepath=ROOT+'/renders/v2/frame_'
scene.render.use_file_extension=True
scene.eevee.taa_render_samples=32
scene.view_settings.view_transform='AgX'
scene.view_settings.look='AgX - Medium High Contrast'
scene.view_settings.exposure=0.0
scene.render.image_settings.color_mode='RGB'

def mat(name, color, metal=0, rough=.35, emission=0):
    m=bpy.data.materials.new(name); m.diffuse_color=(*color,1); m.use_nodes=True
    p=m.node_tree.nodes.get('Principled BSDF')
    p.inputs['Base Color'].default_value=(*color,1)
    p.inputs['Metallic'].default_value=metal; p.inputs['Roughness'].default_value=rough
    if emission:
        p.inputs['Emission Color'].default_value=(*color,1); p.inputs['Emission Strength'].default_value=emission
    return m
navy=mat('Midnight blue • polished hull',(.014,.035,.058),.58,.23)
white=mat('Warm pearl • yacht enamel',(.83,.82,.72),.3,.24)
bronze=mat('Champagne bronze • mounting hardware',(.49,.28,.105),.82,.24)
chrome=mat('Brushed marine stainless',(.38,.45,.47),.87,.23)
black=mat('Carbon and graphite',(.013,.020,.026),.25,.35)
glass=mat('Smoked blue glazing',(.012,.073,.105),.75,.14)
red=mat('Burgundy boot stripe',(.25,.026,.022),.25,.29)
rope=mat('Graphite standing rigging',(.11,.125,.13),.5,.4)
foam=mat('Whitewater',(.6,.79,.78),.05,.36)
light=mat('Warm deck lighting',(.98,.52,.17),.2,.25,3)
bluefire=mat('Ion blue exhaust',(.055,.36,1),.0,.3,5)
corefire=mat('White hot exhaust core',(.55,.78,1),.0,.25,11)
orange=mat('Exhaust rim amber',(1,.24,.018),.0,.3,5)
teak=mat('Quarter sawn teak',(.30,.14,.055),0,.5)
nt=teak.node_tree; p=nt.nodes.get('Principled BSDF')
tex=nt.nodes.new('ShaderNodeTexNoise'); tex.inputs['Scale'].default_value=3; tex.inputs['Detail'].default_value=3
tc=nt.nodes.new('ShaderNodeTexCoord'); mapping=nt.nodes.new('ShaderNodeVectorMath'); mapping.operation='MULTIPLY'; mapping.inputs[1].default_value=(.12,7,3)
nt.links.new(tc.outputs['Generated'],mapping.inputs[0]); nt.links.new(mapping.outputs[0],tex.inputs['Vector'])
ramp=nt.nodes.new('ShaderNodeValToRGB'); ramp.color_ramp.elements[0].color=(.12,.048,.017,1); ramp.color_ramp.elements[1].color=(.46,.25,.10,1)
nt.links.new(tex.outputs['Fac'],ramp.inputs[0]); nt.links.new(ramp.outputs[0],p.inputs['Base Color'])
sailmat=mat('Ivory woven sailcloth',(.9,.86,.72),0,.62)
sp=sailmat.node_tree.nodes.get('Principled BSDF'); sp.inputs['Sheen Weight'].default_value=.25
sp.inputs['Subsurface Weight'].default_value=.055
sn=sailmat.node_tree.nodes.new('ShaderNodeTexNoise'); sn.inputs['Scale'].default_value=210
sb=sailmat.node_tree.nodes.new('ShaderNodeBump'); sb.inputs['Strength'].default_value=.16; sb.inputs['Distance'].default_value=.018
sailmat.node_tree.links.new(sn.outputs['Fac'],sb.inputs['Height']); sailmat.node_tree.links.new(sb.outputs[0],sp.inputs['Normal'])
seammat=mat('Sail panel seams',(.58,.56,.48),0,.7)

col=bpy.data.collections.new('KORU / yacht and propulsion'); scene.collection.children.link(col)
ship=bpy.data.objects.new('KORU • motion rig',None); scene.collection.objects.link(ship)
def finish(obj,name,ma=None,parent=True):
    obj.name=name
    if ma: obj.data.materials.append(ma)
    if parent: obj.parent=ship
    if obj.type=='MESH':
        for p in obj.data.polygons:p.use_smooth=True
    return obj
def mesh(name,vs,fs,ma,parent=True):
    d=bpy.data.meshes.new(name); d.from_pydata(vs,[],fs); d.update()
    o=bpy.data.objects.new(name,d); scene.collection.objects.link(o); return finish(o,name,ma,parent)
def cube(name,loc,scale,ma,bevel=.15,parent=True):
    bpy.ops.mesh.primitive_cube_add(size=1,location=loc); o=bpy.context.object
    o.dimensions=scale; bpy.ops.object.transform_apply(location=False,rotation=False,scale=True)
    finish(o,name,ma,parent)
    if bevel:
        b=o.modifiers.new('Soft manufactured edges','BEVEL'); b.width=bevel; b.segments=3
        o.modifiers.new('Weighted corner normals','WEIGHTED_NORMAL')
    return o
def line(name,pts,r,ma,parent=True):
    d=bpy.data.curves.new(name,'CURVE'); d.dimensions='3D'; d.resolution_u=2; d.bevel_depth=r; d.bevel_resolution=2
    s=d.splines.new('POLY'); s.points.add(len(pts)-1)
    for p,co in zip(s.points,pts):p.co=(*co,1)
    o=bpy.data.objects.new(name,d); scene.collection.objects.link(o); return finish(o,name,ma,parent)
def rod(name,a,b,r,ma,r2=None,vertices=16):
    a=Vector(a); b=Vector(b); delta=b-a
    bpy.ops.mesh.primitive_cone_add(vertices=vertices,radius1=r,radius2=r if r2 is None else r2,depth=delta.length,location=(a+b)/2)
    o=bpy.context.object; o.rotation_euler=delta.to_track_quat('Z','Y').to_euler(); return finish(o,name,ma)
def uv(name,loc,scale,ma,parent=True):
    bpy.ops.mesh.primitive_uv_sphere_add(segments=24,ring_count=12,location=loc); o=bpy.context.object; o.scale=scale; return finish(o,name,ma,parent)
def text(name,body,loc,size,ma,rot=(pi/2,0,0)):
    d=bpy.data.curves.new(name,'FONT'); d.body=body; d.size=size; d.align_x='CENTER'; d.extrude=.004; d.space_character=1.3
    o=bpy.data.objects.new(name,d); scene.collection.objects.link(o); o.location=loc; o.rotation_euler=rot; return finish(o,name,ma)

# Fair hull: fine clipper bow, rounded canoe stern and curved topsides.
def width(x):
    t=(x+55)/110
    return max(.04,8.25*max(0,sin(pi*t))**.63*(1-.20*t))
def sheer(x):return 5.7+1.5*(abs(x)/55)**2.7+.32*x/55
nx=100; nr=48; vs=[]; fs=[]
for i in range(nx+1):
    x=-55+110*i/nx; w=width(x)
    for j in range(nr+1):
        a=-pi/2+pi*j/nr
        y=w*sin(a); z=sheer(x)-(sheer(x)+3.5)*max(0,cos(a))**.60
        vs.append((x-5*(x/55)**3*cos(a),y,z))
for i in range(nx):
    for j in range(nr):
        a=i*(nr+1)+j; fs.append((a,a+1,a+nr+2,a+nr+1))
hull=mesh('Continuous sculpted hull',vs,fs,navy)
sub=hull.modifiers.new('Fair the hull','SUBSURF');sub.levels=1
# Deck follows the same planform.
vs=[];fs=[]
for i in range(nx+1):
    x=-54.8+109.6*i/nx
    vs.extend([(x,-width(x)*.975,sheer(x)-.13),(x,width(x)*.975,sheer(x)-.13)])
for i in range(nx):fs.append((2*i,2*i+1,2*i+3,2*i+2))
mesh('Swept teak main deck',vs,fs,teak)
for side in (-1,1):
    for dz,rad,ma in [(0,.15,white),(-.46,.045,bronze),(-4.75,.16,red)]:
        pts=[]
        for i in range(160):
            x=-54.8+109.6*i/159
            # waterline slightly inboard on rounded hull
            pts.append((x,side*width(x)*(1 if dz>-1 else .83),sheer(x)+dz))
        line('Continuous sheer trim',pts,rad,ma)
    # Fine stanchions and two wire lifelines.
    for zoff,r,ma in [(.97,.042,chrome),(.48,.018,rope)]:
        line('Deck safety rail',[(x,side*width(x)*.97,sheer(x)+zoff) for x in [-54+108*i/140 for i in range(141)]],r,ma)
    for i in range(44):
        x=-53+106*i/43; y=side*width(x)*.97
        rod('Stainless stanchion',(x,y,sheer(x)),(x,y,sheer(x)+.97),.039,chrome,vertices=8)
    for x in range(-43,43,4):
        z=3.1; y=side*width(x)*.965
        uv('Hull oval portlight',(x,y,z),(.49,.045,.23),bronze)
        uv('Hull portlight glass',(x,y+side*.038,z),(.40,.055,.17),glass)
# Teak seams clipped to the deck outline.
for k in range(-26,27):
    y=k*.27; pts=[]
    for i in range(200):
        x=-54+108*i/199
        if abs(y)<width(x)*.93:pts.append((x,y,sheer(x)-.112))
    if len(pts)>1:line('Teak caulking',pts,.013,black)
# Low, long, stepped deckhouses.
cube('Lower saloon enamel',(-9,0,7.1),(53,11.8,2.7),white,.8)
cube('Lower panoramic glazing',(-10,0,7.8),(48,12.02,1.12),glass,.3)
for side in (-1,1):
    for x in range(-32,16,3):cube('Window mullion',(x,side*6.035,7.8),(.14,.1,1.26),white,.035)
cube('Lower teak roof',(-11,0,8.8),(56,12.9,.36),teak,.4)
cube('Lower fascia',(-11,0,8.62),(56.4,13.1,.20),white,.12)
cube('Upper deckhouse',(-6,0,10.0),(36,9.6,2.5),white,.65)
cube('Upper blue glass',(-5,0,10.3),(35,9.75,1.35),glass,.3)
for side in (-1,1):
    for x in range(-22,13,3):cube('Bridge mullion',(x,side*4.91,10.3),(.16,.13,1.5),white,.03)
cube('Bridge roof',(-6,0,11.47),(38,10.5,.30),white,.4)
cube('Bridge roof teak',(-6,0,11.65),(37,10,.12),teak,.3)
# Shaded aft cockpit, pool, lounge details.
cube('Aft canopy',(-33,0,9.1),(15,11,.25),white,.5)
for x in (-39,-27):
    for y in (-5,5):rod('Canopy bronze support',(x,y,6.4),(x,y,9.1),.085,bronze)
cube('Pool marble coping',(-43,0,6.82),(7,4.7,.26),white,.65)
pool=mat('Aft pool turquoise',(.016,.31,.35),.35,.13)
cube('Aft reflecting pool',(-43,0,6.99),(6.45,4.13,.08),pool,.6)
for x in (-37,-31,16,21):
    for y in (-3.6,3.6):
        cube('Teak chaise frame',(x,y,7 if x<0 else 6.45),(2.2,1,.28),teak,.15)
        cube('Ivory chaise cushion',(x,y,7.22 if x<0 else 6.67),(2.05,.91,.21),white,.12)
for x in (-17,2):
    uv('Satellite radome',(x,3,12.5),(.75,.75,.85),white)
    rod('Antenna',(x,-3,11.8),(x,-3,14),.04,white)
for side in (-1,1):
    for x in range(-36,25,4):uv('Deck courtesy lamp',(x,side*6.4,6.5),(.13,.08,.05),light)
    for x in (-44,40):
        rod('Deck cleat',(x,side*width(x)*.8,6.9),(x+1,side*width(x)*.8,6.9),.1,chrome)
text('Hull name port','K O R U',(-39,-width(-39)*.985,4.8),1.05,bronze)
text('Hull name starboard','K O R U',(-39,width(-39)*.985,4.8),1.05,bronze,(pi/2,0,pi))
rod('Long tapered bowsprit',(49,0,7.4),(70,0,8.3),.30,white,.10)
for side in (-1,1):line('Bowsprit whisker stay',[(46,side*3,6.7),(70,0,8.3),(51,0,1.7)],.042,rope)

# Three-masted schooner rig with broad, cambered quadrilateral sails.
def sail_point(x,h,u,v,span):
    # u up the mast, v aft across the sail. Top narrows to preserve a gaff silhouette.
    z=12+(h-15)*u-12*u*(1-v)
    chord=span*(1-.25*u)
    xx=x-1.0-v*chord
    yy=-.5-3.0*sin(pi*v)*sin(pi*(.08+.88*u))-.07*v*sin(u*8)
    return (xx,yy,z)
for idx,(x,h,span) in enumerate([(30,67,23),(3,69,24),(-24,64,23)]):
    rod('Mast %d • pearl spar'%(idx+1),(x,0,6),(x-1.0,0,h),.47,white,.18,24)
    rod('Boom %d'%(idx+1),(x,0,11.7),(x-span-1,-.7,11.7),.22,white,.14)
    for z,breadth in [(26,3.0),(42,2.5),(54,1.9)]:
        rod('Spreaders',(x-.4,-breadth,z),(x-.4,breadth,z),.07,chrome)
    for side in (-1,1):
        for dx in (-3,3):
            line('Standing shroud',[(x+dx,side*width(x)*.9,sheer(x)+.2),(x-.5,side*3,26),(x-.7,side*2.5,42),(x-1,0,h)],.026,rope)
        line('Backstay',[(x-1,0,h),(max(-52,x-24),side*4.2,7)],.03,rope)
    vs=[]; fs=[]; nu=24; nv=18
    for i in range(nu+1):
        for j in range(nv+1):vs.append(sail_point(x,h,i/nu,j/nv,span))
    for i in range(nu):
        for j in range(nv):
            a=i*(nv+1)+j;fs.append((a,a+1,a+nv+2,a+nv+1))
    s=mesh('Sail %d • shaped ivory cloth'%(idx+1),vs,fs,sailmat)
    sol=s.modifiers.new('Sailcloth thickness','SOLIDIFY');sol.thickness=.018
    # Barely perceptible breathing in the cloth.
    s.shape_key_add(name='Calm'); key=s.shape_key_add(name='Wind pressure')
    for k,v in enumerate(key.data):
        u=(k//(nv+1))/nu; t=(k%(nv+1))/nv
        v.co.y-=.50*sin(pi*t)*sin(pi*u)
    for f,value in [(1,.2),(55,.8),(110,.25),(175,.9),(240,.2)]:key.value=value;key.keyframe_insert('value',frame=f)
    for u in [i/12 for i in range(13)]:
        line('Horizontal sail seam',[sail_point(x,h,u,j/40,span) for j in range(41)],.018,seammat)
    for v in [.0,.25,.5,.75,1]:
        line('Vertical sail seam',[sail_point(x,h,i/50,v,span) for i in range(51)],.018,seammat)
    for u in [.18,.43,.69,.89]:
        line('Sail batten',[sail_point(x,h,u,.66+.34*j/12,span) for j in range(13)],.042,seammat)
    line('Sail leech',[sail_point(x,h,i/40,1,span) for i in range(41)],.045,white)
    line('Masthead stay',[(x-1,0,h),(70,0,8.3) if idx==0 else (x+27-1,0,h+1)],.028,rope)

def jib(name,A,B,C,belly):
    vs=[];fs=[];n=30
    # Rectangular parameterization pinches at head.
    for i in range(n+1):
        u=i/n
        for j in range(n+1):
            v=j/n
            p=(1-u)*((1-v)*Vector(A)+v*Vector(B))+u*Vector(C)
            p.y-=belly*sin(pi*v)*sin(pi*u)
            vs.append(tuple(p))
    for i in range(n):
        for j in range(n):a=i*(n+1)+j;fs.append((a,a+1,a+n+2,a+n+1))
    mesh(name,vs,fs,sailmat)
    for a,b in [(A,B),(B,C),(C,A)]:line('Jib bolt rope',[a,b],.048,white)
    for t in [.2,.4,.6,.8]:
        a=Vector(A).lerp(Vector(C),t); b=Vector(B).lerp(Vector(C),t)
        line('Jib stitched panel',[tuple(a.lerp(b,j/30)+Vector((0,-belly*sin(pi*j/30)*sin(pi*t),0))) for j in range(31)],.021,seammat)
jib('Outer headsail',(69,0,9),(48,-1.6,17),(29,0,65),1.8)
jib('Inner staysail',(52,-.2,9),(33,-1.3,12),(29.3,0,48),1.7)


# Original Blue Origin vector outlines, embedded for reproducible standalone builds.
LOGO_SVGS = {'blue-origin-wordmark.svg': '<?xml version="1.0" encoding="UTF-8"?>\n<!-- Generator: Adobe Illustrator 18.1.1, SVG Export Plug-In  -->\n<svg width="800" height="150" enable-background="new 0 0 159 26.8" version="1.1" xml:space="preserve" xmlns="http://www.w3.org/2000/svg"><title>Logo of Blue Origin</title><path d="m210.17 108.33c0 9.2831-3.9087 13.68-11.726 13.68s-11.726-4.3973-11.726-13.68v-95.763h-21.986v95.274c0 21.986 12.703 33.712 33.712 33.712 21.009 0 33.712-12.215 33.712-33.712v-95.274h-21.986zm-147.55-35.667c10.749-4.3973 15.146-15.635 15.146-26.872 0-21.498-10.26-33.712-33.712-33.712h-32.735v127.03h34.69c24.918 0 34.201-15.635 34.201-36.644 0-16.123-6.8402-24.918-17.589-29.804zm-29.315-42.507h8.306c9.7717 0 14.169 5.863 14.169 18.078 0 10.749-6.3516 16.123-14.658 16.123h-8.306zm8.7945 91.366h-8.7945v-39.087h6.8402c13.192 0 18.078 6.3516 18.078 19.543 0 12.703-4.3973 19.543-16.123 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for filename, svg in LOGO_SVGS.items(): Path(ROOT,'references',filename).write_text(svg)
logo_blue=mat('Blue Origin • authentic blue livery',(0,.0331,.7231),.12,.30)
def vector_livery(filename,cx,cy,cz,width_m,side):
    before=set(bpy.data.objects)
    bpy.ops.import_curve.svg(filepath=str(Path(ROOT,'references',filename)))
    imported=[o for o in bpy.data.objects if o not in before]
    bpy.ops.object.select_all(action='DESELECT')
    for o in imported:o.select_set(True)
    bpy.context.view_layer.objects.active=imported[0]
    bpy.ops.object.convert(target='MESH')
    bpy.ops.object.join(); o=bpy.context.object
    # Bake SVG transforms before measuring the exact original outline.
    bpy.ops.object.transform_apply(location=True,rotation=True,scale=True)
    xs=[v.co.x for v in o.data.vertices];ys=[v.co.y for v in o.data.vertices]
    mx=(min(xs)+max(xs))/2;my=(min(ys)+max(ys))/2;scale=width_m/(max(xs)-min(xs))
    # Subdivide planar faces before wrapping so wide glyphs follow the nacelle.
    bpy.ops.object.mode_set(mode='EDIT');bpy.ops.mesh.select_all(action='SELECT')
    bpy.ops.mesh.quads_convert_to_tris();bpy.ops.mesh.subdivide(number_cuts=4);bpy.ops.object.mode_set(mode='OBJECT')
    for v in o.data.vertices:
        x=cx+(v.co.x-mx)*scale*(-side);dz=(v.co.y-my)*scale
        r=2.15 if x<=-7 else (2.15-(x+7)*.0375 if x<=-3 else 2-(x+3)*.15)
        v.co=(x,cy+side*(math.sqrt(max(.05,r*r-dz*dz))+.025),cz+dz)
    o.data.materials.clear();finish(o,'Blue Origin / original SVG / '+filename,logo_blue)
    # Imported face winding varies after the cylinder mapping; render both sides.
    return o

# Bespoke strap-on propulsion: lacquered tapered nacelles and visible saddles.
def lathe_x(name,profile,y,z,ma,n=64):
    vs=[];fs=[]
    for x,r in profile:
        for k in range(n):a=2*pi*k/n;vs.append((x,y+r*cos(a),z+r*sin(a)))
    for i in range(len(profile)-1):
        for k in range(n):a=i*n+k;b=i*n+(k+1)%n;fs.append((a,b,b+n,a+n))
    return mesh(name,vs,fs,ma)
for side in (-1,1):
    y=side*10.3; z=4.75
    lathe_x('Pearl rocket nacelle', [(-35,1.5),(-33,2.0),(-28,2.15),(-7,2.15),(-3,2.0),(0,1.55),(3,.65),(4,.04)],y,z,white)
    # Polished nose and navy aft taper.
    lathe_x('Bronze nose cap',[(1.8,1.04),(3,.65),(4,.04)],y,z,bronze)
    lathe_x('Navy thrust section',[(-39,1.6),(-37,1.65),(-35,1.5),(-33,2.015)],y,z,navy)
    # Broad bands are the visually legible straps; structural saddles connect to the hull.
    for x in (-27,-10):
        lathe_x('Bronze mounting strap',[(x-.55,2.17),(x+.55,2.17)],y,z,bronze)
        for xx in (x-.62,x+.62):lathe_x('Strap graphite gasket',[(xx-.06,2.175),(xx+.06,2.175)],y,z,black)
        cube('Saddle connector',(x,side*8.1,5.5),(1.7,3.8,1.0),navy,.25)
        cube('Mounting foot',(x,side*6.6,6.23),(3.0,1.15,.55),bronze,.16)
        for theta in [-1.1,-.55,0,.55,1.1]:
            yy=y+side*2.19*cos(theta);zz=z+2.19*sin(theta)
            uv('Strap fastening bolt',(x,yy,zz),(.14,.1,.14),chrome)
    vector_livery('blue-origin-wordmark.svg',-18,y,z+.05,10.6,side)
    vector_livery('blue-origin-feather.svg',-5.4,y,z,5.7,side)
    text('New Shepard identification','NEW SHEPARD  /  BE-3PM',(-18,y+side*1.79,z-1.23),.25,navy,(pi/2,0,0 if side<0 else pi))
    # New Shepard ring-fin language, with folded landing braces aft.
    lathe_x('New Shepard forward ring fin',[(-1.0,2.03),(-.65,2.32),(-.4,2.32),(-.1,1.59)],y,z,white)
    for a in (pi/4,3*pi/4,5*pi/4,7*pi/4):
        yy=y+2.05*cos(a);zz=z+2.05*sin(a)
        rod('Stowed landing strut',(-34,yy,zz),(-28,yy,zz),.12,black)

    # Cooling flutes and a recessed bell, all geometry rather than flat textures.
    for x in [-34+i*.30 for i in range(13)]:lathe_x('Cooling collar rib',[(x,1.89),(x+.08,1.89)],y,z,chrome,48)
    lathe_x('Graphite expansion nozzle',[(-37,1.0),(-38,1.22),(-39.4,1.72),(-39.7,1.74),(-39.7,1.51),(-39.3,1.49),(-38,1.02)],y,z,black)
    lathe_x('Nozzle bronze lip',[(-39.7,1.75),(-39.45,1.75)],y,z,bronze)
    lathe_x('Nozzle ignition ring',[(-39.71,1.5),(-39.64,1.5)],y,z,orange)
    # Three nested tapered, rippling plumes and shock diamonds.
    flame_root=bpy.data.objects.new('Animated exhaust envelope',None);scene.collection.objects.link(flame_root);flame_root.parent=ship;flame_root.location=(-39.7,y,z)
    for radius,length,ma in [(1.34,24,bluefire),(.85,18,corefire),(.36,27,corefire)]:
        profile=[]
        for i in range(61):
            t=i/60;rr=radius*(1-t)**.75*(.84+.16*cos(t*35))
            profile.append((-length*t,max(.005,rr)))
        o=lathe_x('Sculpted exhaust plume',profile,0,0,ma,32);o.parent=flame_root
    for i in range(6):
        x=-2.2-i*2.6;r=.68*(1-i*.1)
        o=uv('Supersonic shock diamond',(x,0,0),(1.05,r,r),corefire);o.parent=flame_root
    for f in range(1,289,4):
        strength=1.0
        flame_root.scale=(max(.04,strength*(.94+.07*sin(f*1.3))),max(.10,strength),max(.10,strength))
        flame_root.keyframe_insert('scale',frame=f)
    ld=bpy.data.lights.new('Blue reflected engine light','POINT');ld.energy=1600;ld.color=(.06,.32,1);ld.shadow_soft_size=2
    lo=bpy.data.objects.new('Engine sea glow',ld);scene.collection.objects.link(lo);lo.parent=ship;lo.location=(-41,y,4)

# Procedural open sea, real displaced geometry near the yacht and infinite horizon.
ocean=mat('Deep ocean • moving capillary waves',(.015,.105,.14),.35,.21)
nt=ocean.node_tree;p=nt.nodes.get('Principled BSDF');p.inputs['IOR'].default_value=1.333;p.inputs['Metallic'].default_value=.12;p.inputs['Roughness'].default_value=.26
tc=nt.nodes.new('ShaderNodeTexCoord'); add=nt.nodes.new('ShaderNodeVectorMath');add.operation='ADD'
nt.links.new(tc.outputs['Object'],add.inputs[0])
for f,v in [(1,(0,0,0)),(288,(4,1,0))]:add.inputs[1].default_value=v;add.inputs[1].keyframe_insert('default_value',frame=f)
n1=nt.nodes.new('ShaderNodeTexNoise');n1.inputs['Scale'].default_value=.6;n1.inputs['Detail'].default_value=4;n1.inputs['Roughness'].default_value=.7
nt.links.new(add.outputs[0],n1.inputs['Vector'])
b=nt.nodes.new('ShaderNodeBump');b.inputs['Strength'].default_value=.42;b.inputs['Distance'].default_value=.3
nt.links.new(n1.outputs['Fac'],b.inputs['Height']);nt.links.new(b.outputs[0],p.inputs['Normal'])
cr=nt.nodes.new('ShaderNodeValToRGB');cr.color_ramp.elements[0].color=(.006,.038,.052,1);cr.color_ramp.elements[1].color=(.035,.16,.19,1)
nt.links.new(n1.outputs['Fac'],cr.inputs[0]);nt.links.new(cr.outputs[0],p.inputs['Base Color'])
cube('Infinite ocean',(0,0,-.7),(20000,20000,.2),ocean,0,False)
vs=[];fs=[];n=190;size=680
for i in range(n+1):
    x=-size/2+size*i/n
    for j in range(n+1):
        y=-size/2+size*j/n
        z=.18*sin(x*.17+y*.12)+.13*sin(x*.33-y*.18)+.09*sin(y*.61+x*.15)
        vs.append((x,y,z-.22))
for i in range(n):
    for j in range(n):a=i*(n+1)+j;fs.append((a,a+1,a+n+2,a+n+1))
sea=mesh('Rolling ocean surface',vs,fs,ocean,False)
sea.shape_key_add(name='Swell A');sk=sea.shape_key_add(name='Swell B')
for v in sk.data:
    x,y,z=v.co;v.co.z=.18*sin(x*.17+y*.12+1.5)+.13*sin(x*.33-y*.18+2)+.09*sin(y*.61+x*.15+1)-.22
for f,v in [(1,0),(75,1),(150,0),(240,1)]:sk.value=v;sk.keyframe_insert('value',frame=f)

wake_start=set(bpy.data.objects)
# Layered foam ribbons and streaks follow the hull and expand aft.
wakemat=mat('Aerated wake foam',(.42,.68,.69),.1,.4)
nt=wakemat.node_tree;p=nt.nodes.get('Principled BSDF');no=nt.nodes.new('ShaderNodeTexNoise');no.inputs['Scale'].default_value=2.5;no.inputs['Detail'].default_value=3
ra=nt.nodes.new('ShaderNodeValToRGB');ra.color_ramp.elements[0].position=.33;ra.color_ramp.elements[0].color=(.015,.13,.17,1);ra.color_ramp.elements[1].position=.65;ra.color_ramp.elements[1].color=(.68,.85,.8,1)
nt.links.new(no.outputs['Fac'],ra.inputs[0]);nt.links.new(ra.outputs[0],p.inputs['Base Color'])
for side in (-1,1):
    for k in range(8):
        vs=[];fs=[]
        for i in range(150):
            t=i/149;x=52-175*t
            y=side*(width(max(-54,min(54,x))) if x>-48 else 4+(abs(x)-48)*.20)
            y+=side*(k*.45+sin(t*35+k)*.18)
            w=(.2+.45*t)*(1+.6*sin(t*29+k))
            for yy in (y-w,y+w):vs.append((x,yy,.09+.07*sin(x*.2+yy*.3)+k*.007))
        for i in range(149):fs.append((2*i,2*i+1,2*i+3,2*i+2))
        mesh('Lacing wake ribbon',vs,fs,wakemat)
    # Bow spray delicate arcs.
    for i in range(26):
        x=46-i*.28;y=side*(width(x)+random.uniform(.1,.7));z=.3+random.random()*.4
        line('Bow wave spray',[(x,y,z),(x-1,y+side*.5,z+.5),(x-3,y+side*.7,.15)],.025+random.random()*.03,foam)
for i in range(135):
    x=random.uniform(-110,-37);y=random.uniform(-10,10);z=random.uniform(.01,.2)
    uv('Broken trailing foam',(x,y,z),(random.uniform(.4,2),random.uniform(.05,.25),.018),wakemat)

# Advect foam backward in the moving reference frame: sea-speed 14.936 m/s.
wake_root=bpy.data.objects.new('Water effects • translation only',None);scene.collection.objects.link(wake_root)
for o in set(bpy.data.objects)-wake_start:
    if o!=wake_root and o.parent==ship:o.parent=wake_root
# Shared low-poly droplets, animated with analytic ages so the wake never freezes.
bpy.ops.mesh.primitive_ico_sphere_add(subdivisions=1,radius=1)
prototype=bpy.context.object;droplet_mesh=prototype.data;bpy.data.objects.remove(prototype,do_unlink=True)
droplet_mesh.materials.append(foam)
for i in range(420):
    side=-1 if i%2==0 else 1;phase=random.random()*9.5
    ob=bpy.data.objects.new('Advected bow spray / %03d'%i,droplet_mesh);scene.collection.objects.link(ob);ob.parent=wake_root
    age='(((frame-1)/24+%.5f)%%9.5)'%phase
    def drive(prop,index,expr):ob.driver_add(prop,index).driver.expression=expr
    drive('location',0,'48-14.936*'+age)
    offset=random.uniform(.1,3.4);spread=random.uniform(.65,1.5)
    # Broad wake fans out downstream, droplets settle into foam on the surface.
    drive('location',1,'%d*(3.7+%f+%f*%s)'%(side,offset,spread,age))
    height=random.uniform(.3,2.0)
    drive('location',2,'.12+%f*max(0,1-%s/1.6)*(sin(%s*2.0)**2)'%(height,age,age))
    length=random.uniform(.25,1.2);breadth=random.uniform(.06,.22)
    envelope='min(1,%s*3)*min(1,(9.5-%s)*2)'%(age,age)
    drive('scale',0,'%f*(1+%s*.3)*(%s)'%(length,age,envelope))
    drive('scale',1,'%f*(%s)'%(breadth,envelope))
    drive('scale',2,'(.035+.08*max(0,1-%s/1.6))*(%s)'%(age,envelope))

# Atmospheric golden-hour environment.
world=bpy.data.worlds.new('Marine evening sky');scene.world=world;world.use_nodes=True
nt=world.node_tree;bg=nt.nodes.get('Background');bg.inputs['Strength'].default_value=.8
geo=nt.nodes.new('ShaderNodeTexCoord');sep=nt.nodes.new('ShaderNodeSeparateXYZ');nt.links.new(geo.outputs['Normal'],sep.inputs[0]);flip=nt.nodes.new('ShaderNodeMath');flip.operation='ABSOLUTE';nt.links.new(sep.outputs['Z'],flip.inputs[0])
sky=nt.nodes.new('ShaderNodeValToRGB')
sky.color_ramp.elements.remove(sky.color_ramp.elements[1])
for pos,color in [(0,(.52,.59,.62,1)),(.18,(.28,.40,.52,1)),(.55,(.085,.20,.34,1)),(1,(.045,.12,.23,1))]:
    e=sky.color_ramp.elements[0] if pos==0 else sky.color_ramp.elements.new(pos);e.position=pos;e.color=color
nt.links.new(flip.outputs[0],sky.inputs[0]);nt.links.new(sky.outputs[0],bg.inputs['Color'])
ld=bpy.data.lights.new('Late sun','SUN');ld.energy=3.0;ld.angle=math.radians(9);ld.color=(1,.79,.54)
lo=bpy.data.objects.new('Late sun',ld);scene.collection.objects.link(lo);lo.rotation_euler=(math.radians(32),math.radians(-20),math.radians(-35))
ld=bpy.data.lights.new('Soft sky fill','AREA');ld.energy=75000;ld.shape='DISK';ld.size=100;ld.color=(.53,.72,1)
lo=bpy.data.objects.new('Soft sky fill',ld);scene.collection.objects.link(lo);lo.location=(30,-65,85);lo.rotation_euler=(Vector((0,0,10))-lo.location).to_track_quat('-Z','Y').to_euler()

# Twelve-second steady full-throttle excerpt. 29.029 kn is conditional model equilibrium.
SPEED=29.029199*1852/3600
tracking=bpy.data.objects.new('Camera tracking • same forward speed',None);scene.collection.objects.link(tracking)
for ob in (ship,wake_root,tracking):
    ob.driver_add('location',0).driver.expression='(frame-1)/24*%.8f'%SPEED
ship.driver_add('location',2).driver.expression='.12+.10*sin(frame*.045)'
ship.driver_add('rotation_euler',0).driver.expression='.003*sin(frame*.035)'
# Small artistic bow-up trim, not a solved planing attitude.
ship.driver_add('rotation_euler',1).driver.expression='-.0105+.002*sin(frame*.045)'
target=bpy.data.objects.new('Camera aim',None);scene.collection.objects.link(target);target.parent=tracking
bpy.ops.object.camera_add();cam=bpy.context.object;cam.name='CAM • full speed tracking orbit';scene.camera=cam;cam.parent=tracking
cam.data.lens=48;cam.data.clip_end=30000
con=cam.constraints.new('TRACK_TO');con.target=target;con.track_axis='TRACK_NEGATIVE_Z';con.up_axis='UP_Y'
for f,pos,aim,lens in [(1,(113,-221,60),(0,0,26),48),(85,(85,-222,51),(-3,0,26),49),(168,(39,-224,44),(-5,0,27),50),(288,(-20,-237,46),(-6,0,27),50)]:
    cam.location=pos;cam.keyframe_insert('location',frame=f);cam.data.lens=lens;cam.data.keyframe_insert('lens',frame=f)
    target.location=aim;target.keyframe_insert('location',frame=f)
wide_marker=scene.timeline_markers.new('Steady full throttle • 29 kn scenario',frame=1);wide_marker.camera=cam
bpy.ops.object.camera_add();detail=bpy.context.object;detail.name='CAM • authentic Blue Origin livery';detail.parent=tracking;detail.data.lens=52;detail.data.clip_end=30000
dt=bpy.data.objects.new('Detail camera aim',None);scene.collection.objects.link(dt);dt.parent=tracking;dt.location=(-19,-3,5.5)
dc=detail.constraints.new('TRACK_TO');dc.target=dt;dc.track_axis='TRACK_NEGATIVE_Z';dc.up_axis='UP_Y'
for f,pos in [(169,(5,-101,24)),(240,(-18,-94,20))]:
    detail.location=pos;detail.keyframe_insert('location',frame=f)
marker=scene.timeline_markers.new('Original Blue Origin vector livery',frame=169);marker.camera=detail
marker=scene.timeline_markers.new('Full speed • broadside finale',frame=241);marker.camera=cam
scene.camera=cam

# A restrained optical bloom around the engines.
scene.use_nodes=True
nt=bpy.data.node_groups.new('Koru optical finish','CompositorNodeTree');scene.compositing_node_group=nt;nt.interface.new_socket(name='Image',in_out='OUTPUT',socket_type='NodeSocketColor')
rl=nt.nodes.new('CompositorNodeRLayers');gl=nt.nodes.new('CompositorNodeGlare');gl.inputs['Type'].default_value='Fog Glow';gl.inputs['Quality'].default_value='Medium';gl.inputs['Threshold'].default_value=2;gl.inputs['Size'].default_value=.35
out=nt.nodes.new('NodeGroupOutput')
scene.view_layers[0].use_pass_mist=True;world.mist_settings.start=180;world.mist_settings.depth=1900;world.mist_settings.falloff='LINEAR'
mix=nt.nodes.new('ShaderNodeMix');mix.data_type='RGBA';mix.inputs[7].default_value=(.416,.472,.496,1)
nt.links.new(rl.outputs['Mist'],mix.inputs[0]);nt.links.new(rl.outputs['Image'],mix.inputs[6]);nt.links.new(mix.outputs[2],gl.inputs['Image']);nt.links.new(gl.outputs['Image'],out.inputs['Image'])
scene['Concept']='KORU / IMPULSE — fictional Koru conversion using Blue Origin New Shepard / BE-3PM inspired propulsion pods. Fairings and integration are artistic adaptations, not flight hardware replicas.'
scene['Source']='Procedurally modeled from public Koru photographs. No engineering accuracy claimed.'
scene['Animation']='288 frames / 24 fps. Steady full throttle at conditional model equilibrium 29.029 kn; no claim of planing. Authentic vector livery.'
scene.frame_set(125)
# Open into a useful camera view.
for screen in bpy.data.screens:
    for area in screen.areas:
        if area.type=='VIEW_3D':area.spaces.active.region_3d.view_perspective='CAMERA'
bpy.ops.wm.save_as_mainfile(filepath=ROOT+'/Koru-Impulse.blend')
scene.render.resolution_percentage=50;scene.eevee.taa_render_samples=24
scene.render.filepath=ROOT+'/renders/v2/preview.png'
bpy.ops.render.render(write_still=True)
print('KORU_BUILD_COMPLETE',flush=True)