; Room planes use independent ceiling/floor distances; the eye is not the room midpoint.
RenderCeilingAndFloor PROC uses ebx esi edi
    local row:DWORD,distance:DWORD,sx:DWORD,sy:DWORD,wx:DWORD,wy:DWORD
    local material:DWORD,shade:DWORD
    mov row, 0
hall_plane_row:
    mov eax, row
    cmp eax, viewHorizon3D
    jge hall_plane_floor
    cmp outdoorRender3D, 0
    jne hall_plane_next_row
    mov ecx, viewHorizon3D
    sub ecx, eax
    mov eax, viewCeiling3D
    sub eax, viewEye3D
    mov material, 101
    cmp hallLevel3D, 0
    je @F
    mov material, 93
@@:
    jmp hall_plane_distance
hall_plane_floor:
    sub eax, viewHorizon3D
    inc eax
    mov ecx, eax
    mov eax, viewEye3D
    mov ebx, floorTexture3D
    mov material, ebx
hall_plane_distance:
    imul eax, SCREEN_H
    cdq
    idiv ecx
    mov distance, eax
    shr eax, 14
    neg eax
    add eax, 256
    cmp eax, 55
    jge @F
    mov eax, 55
@@:
    mov shade, eax
    cmp hallLevel3D, 0
    je @F
    mov eax, shade
    imul eax, 7
    shr eax, 3
    mov shade, eax
@@:
    mov eax, playerPlaneX
    shl eax, 1
    imul distance
    shrd eax, edx, 16
    cdq
    mov ecx, SCREEN_W
    idiv ecx
    mov sx, eax
    mov eax, playerPlaneY
    shl eax, 1
    imul distance
    shrd eax, edx, 16
    cdq
    idiv ecx
    mov sy, eax
    mov eax, playerDirX
    sub eax, playerPlaneX
    imul distance
    shrd eax, edx, 16
    add eax, playerX
    mov wx, eax
    mov eax, playerDirY
    sub eax, playerPlaneY
    imul distance
    shrd eax, edx, 16
    add eax, playerY
    mov wy, eax
    mov eax, row
    imul eax, SCREEN_W*4
    lea edi, screenBuffer[eax]
    mov esi, SCREEN_W
hall_plane_pixel:
    mov ebx, material
    cmp outdoorRender3D, 0
    je hall_plane_sample
    mov eax, wy
    cmp eax, 13*FP_1
    jb hall_plane_crossroad
    cmp eax, 16*FP_1
    jb hall_plane_sample
hall_plane_crossroad:
    mov eax, wx
    cmp eax, 29*FP_1
    jl hall_plane_sidewalk
    cmp eax, 32*FP_1
    jl hall_plane_sample
hall_plane_sidewalk:
    mov ebx, 72
hall_plane_sample:
    cmp outdoorRender3D, 0
    jne hall_plane_low_sample
    mov eax, row
    cmp eax, viewHorizon3D
    jl hall_plane_choose_hd
    cmp hallLevel3D, 0
    jne hall_plane_choose_hd
    cmp wy, 23*FP_1
    jl hall_plane_choose_hd
    cmp wx, 12*FP_1
    jl hall_plane_wood
    cmp wx, 23*FP_1
    jl hall_plane_choose_hd
hall_plane_wood:
    mov ebx, 85
hall_plane_choose_hd:
    cmp distance, 6*FP_1
    ja hall_plane_low_sample
    mov ecx, hallRoomHD3D.pixels
    cmp ebx, 80
    jb hall_plane_low_sample
    cmp ebx, 103
    ja hall_plane_low_sample
    cmp ebx, 92
    jb hall_plane_old_hd
    mov ecx, hallArchitectureHD3D.pixels
    sub ebx, 12
hall_plane_old_hd:
    test ecx, ecx
    jz hall_plane_hd_fallback
    sub ebx, 80
    shl ebx, 18
    add ecx, ebx
    mov eax, wy
    shr eax, 8
    and eax, 255
    shl eax, 8
    mov edx, wx
    shr edx, 8
    and edx, 255
    add eax, edx
    mov eax, [ecx+eax*4]
    jmp hall_plane_shade
hall_plane_hd_fallback:
    mov ebx, material
hall_plane_low_sample:
    shl ebx, 16
    mov eax, wy
    shr eax, 9
    and eax, 127
    shl eax, 7
    mov edx, wx
    shr edx, 9
    and edx, 127
    add eax, edx
    lea ebx, texturesBuffer[ebx]
    mov eax, [ebx+eax*4]
hall_plane_shade:
    cmp outdoorRender3D, 0
    je hall_plane_ambient
    invoke ShadeCityGround3D, eax, wx, wy, shade
    jmp hall_plane_store
hall_plane_ambient:
    mov ebx, eax
    and eax, 0000FF00h
    imul eax, shade
    shr eax, 8
    and eax, 0000FF00h
    mov ecx, ebx
    and ecx, 0FFh
    imul ecx, shade
    shr ecx, 8
    or eax, ecx
    shr ebx, 16
    and ebx, 0FFh
    imul ebx, shade
    shr ebx, 8
    shl ebx, 16
    or eax, ebx
hall_plane_store:
    stosd
    mov eax, sx
    add wx, eax
    mov eax, sy
    add wy, eax
    dec esi
    jnz hall_plane_pixel
hall_plane_next_row:
    inc row
    cmp row, SCREEN_H
    jb hall_plane_row
    ret
RenderCeilingAndFloor ENDP

RenderSprites PROC uses ebx esi edi
    cmp hallLevel3D, 0
    jne hall_sprites_done
    xor esi, esi
hall_sprite_loop:
    cmp esi, 14
    je hall_sprite_next
    imul ebx, esi, SIZEOF SpriteObject
    mov eax, casinoSprites[ebx].posX
    mov hallSpriteTemp3D.posX, eax
    mov eax, casinoSprites[ebx].posY
    mov hallSpriteTemp3D.posY, eax
    mov eax, hallSpriteWidths3D[esi*4]
    mov hallSpriteTemp3D.worldW, eax
    mov eax, hallSpriteHeights3D[esi*4]
    mov hallSpriteTemp3D.worldH, eax
    mov hallSpriteTemp3D.groundZ, 0
    cmp esi, 3
    jae @F
    mov hallSpriteTemp3D.groundZ, FP_1/8
@@:
    mov ecx, casinoSprites[ebx].animSpeed
    imul ecx, 40
    test ecx, ecx
    jnz @F
    mov ecx, 40
@@:
    mov eax, animationClock3D
    cmp esi,3
    jae @F
    mov edx,casinoSprites[ebx].curFrame
    imul edx,ecx
    add eax,edx
@@:
    xor edx, edx
    div ecx
    mov ecx, casinoSprites[ebx].frameCount
    test ecx, ecx
    jnz @F
    mov ecx, 1
@@:
    xor edx, edx
    div ecx
    add edx, casinoSprites[ebx].baseTexId
    shl edx, 16
    add edx, OFFSET texturesBuffer
    mov hallLegacyPack3D.pixels, edx
    mov hallSpriteTemp3D.frame, 0
    mov hallSpriteTemp3D.asset, OFFSET hallLegacyPack3D
    invoke DrawCityObject3D, OFFSET hallSpriteTemp3D, 0
hall_sprite_next:
    inc esi
    cmp esi, NUM_SPRITES
    jb hall_sprite_loop
hall_sprites_done:
    ret
RenderSprites ENDP

InitHall3D PROC uses esi edi
    lea esi, hallLayout3D
    lea edi, casinoMap
    mov ecx, 256
    rep movsd
    mov hallLevel3D, 0
    mov worldMap3D, OFFSET casinoMap
    mov viewEye3D, FP_1*17/20
    mov viewCeiling3D, FP_1*5/2
    mov floorTexture3D, 100
    mov casinoSprites[14*SIZEOF SpriteObject].interactId, 0
    mov patronClock3D, 0
    ret
InitHall3D ENDP

LoadHallAssets3D PROC
    invoke LoadAnimPack3D, OFFSET hallBartender3D, OFFSET hallBartenderPath3D
    invoke LoadAnimPack3D, OFFSET hallProps3D, OFFSET hallPropsPath3D
    invoke LoadAnimPack3D, OFFSET hallDrink3D, OFFSET hallDrinkPath3D
    invoke LoadAnimPack3D, OFFSET hallCityDetail3D, OFFSET hallCityDetailPath3D
    invoke LoadAnimPack3D, OFFSET hallRoomMaterials3D, OFFSET hallRoomMaterialsPath3D
    invoke LoadAnimPack3D, OFFSET hallPatrons3D, OFFSET hallPatronsPath3D
    invoke LoadAnimPack3D, OFFSET hallStreetLife3D, OFFSET hallStreetLifePath3D
    invoke LoadAnimPack3D, OFFSET hallRoomHD3D, OFFSET hallRoomHDPath3D
    invoke LoadAnimPack3D, OFFSET hallArchitecture3D, OFFSET hallArchitecturePath3D
    invoke LoadAnimPack3D, OFFSET hallArchitectureHD3D, OFFSET hallArchitectureHDPath3D
    invoke LoadAnimPack3D, OFFSET hallDecorPack3D, OFFSET hallDecorPath3D
    cmp hallArchitecture3D.pixels, 0
    je @F
    push esi
    push edi
    mov esi, hallArchitecture3D.pixels
    mov edi, OFFSET texturesBuffer+(92*128*128*4)
    mov ecx, 12*128*128
    rep movsd
    pop edi
    pop esi
@@:
    cmp hallRoomMaterials3D.pixels, 0
    je @F
    push esi
    push edi
    mov esi, hallRoomMaterials3D.pixels
    mov edi, OFFSET texturesBuffer+(80*128*128*4)
    mov ecx, 12*128*128
    rep movsd
    pop edi
    pop esi
@@:
    invoke LoadAnimPack3D, OFFSET materialsPack3D, OFFSET materialsPath3D
    cmp materialsPack3D.pixels, 0
    je hall_load_sign
    push ebx
    push esi
    push edi
    xor ebx, ebx
hall_copy_material:
    mov esi, materialsPack3D.pixels
    mov eax, ebx
    shl eax, 16
    add esi, eax
    mov eax, hallMaterialSlots3D[ebx*4]
    shl eax, 16
    lea edi, texturesBuffer[eax]
    mov ecx, 128*128
    rep movsd
    inc ebx
    cmp ebx, 4
    jb hall_copy_material
    pop edi
    pop esi
    pop ebx
hall_load_sign:
    ret
LoadHallAssets3D ENDP

FreeHallAssets3D PROC
    invoke FreeAnimPack3D, OFFSET hallBartender3D
    invoke FreeAnimPack3D, OFFSET hallProps3D
    invoke FreeAnimPack3D, OFFSET hallDrink3D
    invoke FreeAnimPack3D, OFFSET hallCityDetail3D
    invoke FreeAnimPack3D, OFFSET hallRoomMaterials3D
    invoke FreeAnimPack3D, OFFSET hallPatrons3D
    invoke FreeAnimPack3D, OFFSET hallStreetLife3D
    invoke FreeAnimPack3D, OFFSET hallRoomHD3D
    invoke FreeAnimPack3D, OFFSET hallArchitecture3D
    invoke FreeAnimPack3D, OFFSET hallArchitectureHD3D
    invoke FreeAnimPack3D, OFFSET hallDecorPack3D
    ret
FreeHallAssets3D ENDP

; EAX=pixels, ECX=width, EDX=height; legacy materials keep their 128px fallback.
ResolveWorldSurface3D PROC uses esi material:DWORD
    mov eax, material
    cmp eax,110
    jne @F
    mov eax,OFFSET cityBenchMetal3D
    mov ecx,32
    mov edx,32
    ret
@@:
    cmp eax, 104
    jae surface_decor
    cmp eax, 92
    jae surface_architecture
    cmp eax, 80
    jae surface_room
    cmp eax, 57
    jb surface_legacy
    cmp eax, 72
    ja surface_legacy
    mov esi, OFFSET hallCityDetail3D
    sub eax, 57
    jmp surface_pack
surface_room:
    mov esi, OFFSET hallRoomHD3D
    sub eax, 80
    jmp surface_pack
surface_architecture:
    mov esi, OFFSET hallArchitectureHD3D
    sub eax, 92
    jmp surface_pack
surface_decor:
    cmp eax, 109
    ja surface_missing
    mov esi, OFFSET hallDecorPack3D
    sub eax, 104
surface_pack:
    cmp [esi].AnimPack3D.pixels, 0
    je surface_legacy
    cmp eax, [esi].AnimPack3D.frames
    jae surface_missing
    mov ecx, [esi].AnimPack3D.imageWidth
    mov edx, [esi].AnimPack3D.height
    imul eax, ecx
    imul eax, edx
    shl eax, 2
    add eax, [esi].AnimPack3D.pixels
    ret
surface_legacy:
    mov eax, material
    cmp eax, 104
    jae surface_missing
    shl eax, 16
    add eax, OFFSET texturesBuffer
    mov ecx, 128
    mov edx, 128
    ret
surface_missing:
    xor eax, eax
    mov ecx, 128
    mov edx, 128
    ret
ResolveWorldSurface3D ENDP

RenderHall3D PROC uses ebx esi
    cmp hallLevel3D, 0
    jne hall_render_bunker
    ; Fixed bar counter/stage are world geometry, with height and occlusion.
    invoke DrawCityBoxSides3D, 3*FP_1,9*FP_1,23*FP_1,24*FP_1,0,FP_1*13/20,86
    invoke DrawCityHorizontal3D, 3*FP_1,9*FP_1,23*FP_1,24*FP_1,FP_1*13/20,85
    ; Three physical panels preserve detail instead of stretching one over the whole bar.
    invoke DrawCityVertical3D,1,24*FP_1,3*FP_1,5*FP_1,0,FP_1*13/20,84
    invoke DrawCityVertical3D,1,24*FP_1,5*FP_1,7*FP_1,0,FP_1*13/20,84
    invoke DrawCityVertical3D,1,24*FP_1,7*FP_1,9*FP_1,0,FP_1*13/20,84
    invoke DrawCityBoxSides3D,3*FP_1,9*FP_1,21*FP_1,22*FP_1,0,FP_1*19/10,86
    invoke DrawCityVertical3D,1,22*FP_1,3*FP_1,5*FP_1,FP_1*3/5,FP_1*19/10,87
    invoke DrawCityVertical3D,1,22*FP_1,5*FP_1,7*FP_1,FP_1*3/5,FP_1*19/10,87
    invoke DrawCityVertical3D,1,22*FP_1,7*FP_1,9*FP_1,FP_1*3/5,FP_1*19/10,87
    invoke DrawCityBoxSides3D, 10*FP_1,22*FP_1,2*FP_1,5*FP_1,0,FP_1/8,2
    invoke DrawCityHorizontal3D, 10*FP_1,22*FP_1,2*FP_1,5*FP_1,FP_1/8,2
    ; Cabaret has a solid stage, side wings, stairs and lighting truss.
    invoke DrawCityVertical3D,0,10*FP_1,2*FP_1,5*FP_1,FP_1/8,FP_1*23/10,2
    invoke DrawCityVertical3D,0,22*FP_1,2*FP_1,5*FP_1,FP_1/8,FP_1*23/10,2
    invoke DrawCityVertical3D,1,2*FP_1,10*FP_1,22*FP_1,FP_1/8,FP_1*23/10,2
    invoke DrawCityHorizontal3D,14*FP_1,18*FP_1,5*FP_1,FP_1*11/2,FP_1/12,85
    invoke DrawCityHorizontal3D,14*FP_1,18*FP_1,FP_1*11/2,6*FP_1,FP_1/24,85
    invoke DrawCityBoxSides3D,10*FP_1,22*FP_1,5*FP_1,FP_1*51/10,FP_1*11/5,FP_1*23/10,86
    ; Low room boundaries frame dining and billiards without closing their entrances.
    invoke DrawCityBoxSides3D,FP_1*119/10,FP_1*121/10,24*FP_1,FP_1*51/2,0,FP_1*13/20,102
    invoke DrawCityHorizontal3D,FP_1*119/10,FP_1*121/10,24*FP_1,FP_1*51/2,FP_1*13/20,85
    invoke DrawCityBoxSides3D,FP_1*119/10,FP_1*121/10,FP_1*55/2,30*FP_1,0,FP_1*13/20,102
    invoke DrawCityBoxSides3D,23*FP_1,FP_1*116/5,23*FP_1,24*FP_1,0,FP_1*13/20,102
    invoke DrawCityBoxSides3D,23*FP_1,FP_1*116/5,26*FP_1,29*FP_1,0,FP_1*13/20,102
    invoke DrawCityVertical3D,1,6*FP_1,14*FP_1,18*FP_1,FP_1*17/10,FP_1*12/5,109
    invoke DrawCityBoxSides3D,1*FP_1,9*FP_1,FP_1,FP_1*6/5,FP_1*11/5,FP_1*5/2,103
    invoke DrawCityBoxSides3D,23*FP_1,31*FP_1,FP_1,FP_1*6/5,FP_1*11/5,FP_1*5/2,103
    mov eax, animationClock3D
    xor edx, edx
    mov ecx, 220
    div ecx
    and eax, 1
    cmp engineMode, MODE_BAR
    jne hall_bartender_pose
    cmp barPhase3D, 1
    jne hall_bartender_pose
    mov eax, barTime3D
    xor edx, edx
    mov ecx, 375
    div ecx
    cmp eax, 7
    jbe hall_bartender_pose
    mov eax, 7
    jmp hall_bartender_selected
hall_bartender_pose:
    cmp engineMode, MODE_BAR
    jne hall_bartender_store
    cmp barPhase3D, 1
    je hall_bartender_selected
    cmp barPhase3D, 2
    jne hall_bartender_store
    mov eax,7
hall_bartender_selected:
    mov ecx, barSelection3D
    shl ecx, 3
    add eax, ecx
hall_bartender_store:
    mov hallObjects3D[4*SIZEOF CityProp3D].frame, eax
    xor esi, esi
hall_render_props:
    ; The former whole-stage billboard is replaced with world surfaces above.
    cmp esi, 15
    je hall_render_next_prop
    imul eax, esi, SIZEOF CityProp3D
    add eax, OFFSET hallObjects3D
    invoke DrawCityObject3D, eax, 0
hall_render_next_prop:
    inc esi
    cmp esi, HALL_PROP_COUNT
    jb hall_render_props
    xor esi, esi
hall_render_lights:
    imul eax, esi, SIZEOF CityProp3D
    add eax, OFFSET hallLights3D
    invoke DrawCityObject3D,eax,0
    inc esi
    cmp esi, HALL_LIGHT_COUNT
    jb hall_render_lights
    call RenderPatrons3D
    ret
hall_render_bunker:
    mov esi, 0
hall_stair_step:
    mov eax, esi
    imul eax, FP_1/2
    add eax, 24*FP_1
    lea ebx, [eax+FP_1/2]
    lea ecx, [esi+1]
    imul ecx, FP_1/8
    invoke DrawCityHorizontal3D,15*FP_1,18*FP_1,eax,ebx,ecx,88
    mov eax, esi
    imul eax, FP_1/2
    add eax, 24*FP_1
    mov ecx, esi
    imul ecx, FP_1/8
    lea edx, [ecx+FP_1/8]
    invoke DrawCityVertical3D,1,eax,15*FP_1,18*FP_1,ecx,edx,92
    inc esi
    cmp esi, 8
    jb hall_stair_step
    invoke DrawCityBoxSides3D, 14*FP_1,20*FP_1,14*FP_1,15*FP_1,0,FP_1/2,96
    invoke DrawCityHorizontal3D, 14*FP_1,20*FP_1,14*FP_1,15*FP_1,FP_1/2,97
    invoke DrawCityVertical3D,1,11*FP_1+FP_1/10,14*FP_1,16*FP_1,FP_1/4,FP_1*8/5,95
    invoke DrawCityVertical3D,1,11*FP_1+FP_1/10,17*FP_1,19*FP_1+FP_HALF,FP_1/4,FP_1*8/5,95
    invoke DrawCityVertical3D,0,19*FP_1+FP_1*9/10,17*FP_1,20*FP_1,0,FP_1*3/2,99
    ; A narrow, stepped vault is real geometry, not a square workshop ceiling.
    invoke DrawCityHorizontal3D,14*FP_1,15*FP_1,11*FP_1,24*FP_1,FP_1*9/5,93
    invoke DrawCityVertical3D,0,15*FP_1,11*FP_1,24*FP_1,FP_1*9/5,FP_1*11/5,93
    invoke DrawCityHorizontal3D,15*FP_1,16*FP_1,11*FP_1,24*FP_1,FP_1*11/5,93
    invoke DrawCityVertical3D,0,16*FP_1,11*FP_1,24*FP_1,FP_1*11/5,FP_1*5/2,93
    invoke DrawCityHorizontal3D,18*FP_1,19*FP_1,11*FP_1,24*FP_1,FP_1*11/5,93
    invoke DrawCityVertical3D,0,18*FP_1,11*FP_1,24*FP_1,FP_1*11/5,FP_1*5/2,93
    invoke DrawCityHorizontal3D,19*FP_1,20*FP_1,11*FP_1,24*FP_1,FP_1*9/5,93
    invoke DrawCityVertical3D,0,19*FP_1,11*FP_1,24*FP_1,FP_1*9/5,FP_1*11/5,93
    mov eax, animationClock3D
    xor edx, edx
    mov ecx, 240
    div ecx
    and eax, 7
    mov bunkerMerchant3D.frame, eax
    invoke DrawCityObject3D, OFFSET bunkerMerchant3D, 0
    invoke DrawCityObject3D, OFFSET bunkerDisplay3D, 0
    invoke DrawCityObject3D, OFFSET bunkerDesk3D, 0
    invoke DrawCityObject3D, OFFSET bunkerDoor3D, 0
    ret
RenderHall3D ENDP

; Extra rooms use the same distance and facing checks as the existing tables.
HallTarget3D PROC uses ebx wx:DWORD,wy:DWORD,id:DWORD,prompt:DWORD
    mov eax, wx
    sub eax, playerX
    sar eax, 8
    mov ebx, eax
    imul eax, eax
    mov ecx, eax
    mov eax, wy
    sub eax, playerY
    sar eax, 8
    mov edx, eax
    imul eax, eax
    add ecx, eax
    cmp ecx, 262144
    jae hall_target_done
    mov eax, playerDirX
    sar eax, 8
    imul eax, ebx
    mov ebx, playerDirY
    sar ebx, 8
    imul ebx, edx
    add eax, ebx
    cmp eax, 18000
    jl hall_target_done
    mov eax, id
    mov interactTargetId, eax
    mov eax, prompt
    mov interactPromptPtr, eax
hall_target_done:
    ret
HallTarget3D ENDP

CheckHallInteractions3D PROC
    cmp hallLevel3D, 0
    jne hall_check_bunker
    cmp playerX, 3*FP_1
    jl hall_check_other
    cmp playerX, 9*FP_1
    jg hall_check_other
    cmp playerY, 24*FP_1+9830
    jl hall_check_other
    ; A point on the serving edge remains in front even when standing close.
    invoke HallTarget3D, playerX,23*FP_1+FP_HALF,INTERACT_BAR,OFFSET hallBarPrompt3D
hall_check_other:
    invoke HallTarget3D, 28*FP_1+FP_HALF,10*FP_1+FP_HALF,INTERACT_BASEMENT,OFFSET hallBunkerPrompt3D
    invoke HallTarget3D, 27*FP_1,25*FP_1,INTERACT_BILLIARDS,OFFSET hallPoolPrompt3D
    ret
hall_check_bunker:
    mov interactTargetId, 0
    mov interactPromptPtr, 0
    invoke HallTarget3D, 16*FP_1,14*FP_1+FP_HALF,INTERACT_SHOP,OFFSET promptShop
    invoke HallTarget3D, 16*FP_1,27*FP_1,INTERACT_UPSTAIRS,OFFSET hallUpPrompt3D
    ret
CheckHallInteractions3D ENDP

TriggerHallInteraction3D PROC
    cmp interactTargetId, INTERACT_BAR
    jne hall_trigger_stairs
    call LoadHallAssets3D
    mov engineMode, MODE_BAR
    mov barPhase3D, 0
    mov barTime3D, 0
    call ClearKeys3D
    mov eax, 1
    ret
hall_trigger_stairs:
    cmp interactTargetId, INTERACT_BASEMENT
    je hall_begin_stairs
    cmp interactTargetId, INTERACT_UPSTAIRS
    jne hall_trigger_none
hall_begin_stairs:
    cmp hallLevel3D, 0
    jne @F
    mov eax, playerX
    mov stairsReturnX3D, eax
    mov eax, playerY
    mov stairsReturnY3D, eax
    mov eax, playerAngle
    mov stairsReturnAngle3D, eax
@@:
    mov engineMode, MODE_STAIRS
    mov stairsTime3D, 0
    call ClearKeys3D
    mov eax, 1
    ret
hall_trigger_none:
    cmp interactTargetId, INTERACT_BILLIARDS
    jne @F
    call InitPool3D
    mov engineMode, MODE_POOL
    call ClearKeys3D
    mov eax, 1
    ret
@@:
    xor eax, eax
    ret
TriggerHallInteraction3D ENDP

HandleStairs3D PROC
    mov eax, deltaTime3D
    add stairsTime3D, eax
    cmp stairsTime3D, 1600
    jb stairs_handle_done
    xor hallLevel3D, 1
    cmp hallLevel3D, 0
    je stairs_back_to_hall
    mov worldMap3D, OFFSET bunkerMap3D
    mov floorTexture3D, 94
    mov viewCeiling3D, FP_1*5/2
    mov playerX, 16*FP_1+FP_HALF
    mov playerY, 23*FP_1+FP_HALF
    mov playerAngle, 384
    jmp stairs_complete
stairs_back_to_hall:
    mov worldMap3D, OFFSET casinoMap
    mov floorTexture3D, 100
    mov viewCeiling3D, FP_1*5/2
    mov eax, stairsReturnX3D
    mov playerX, eax
    mov eax, stairsReturnY3D
    mov playerY, eax
    mov eax, stairsReturnAngle3D
    mov playerAngle, eax
stairs_complete:
    mov viewEye3D, FP_1*17/20
    mov engineMode, MODE_WALK
    call ClearKeys3D
stairs_handle_done:
    ret
HandleStairs3D ENDP

RenderStairs3D PROC uses ebx esi
    local oldX:DWORD,oldY:DWORD,oldAngle:DWORD,oldMap:DWORD,oldEye:DWORD,oldCeiling:DWORD,oldLevel:DWORD,oldFloor:DWORD
    mov eax, playerX
    mov oldX, eax
    mov eax, playerY
    mov oldY, eax
    mov eax, playerAngle
    mov oldAngle, eax
    mov eax, worldMap3D
    mov oldMap, eax
    mov eax, viewEye3D
    mov oldEye, eax
    mov eax, viewCeiling3D
    mov oldCeiling, eax
    mov eax, hallLevel3D
    mov oldLevel, eax
    mov eax, floorTexture3D
    mov oldFloor, eax
    mov hallLevel3D, 1
    mov worldMap3D, OFFSET bunkerMap3D
    mov floorTexture3D, 94
    mov viewCeiling3D, FP_1*5/2
    mov playerX, 16*FP_1+FP_HALF
    mov playerAngle, 384
    mov eax, stairsTime3D
    cmp eax, 1600
    jbe @F
    mov eax, 1600
@@:
    cmp oldLevel, 0
    je @F
    neg eax
    add eax, 1600
@@:
    imul eax, 4*FP_1
    xor edx, edx
    mov ecx, 1600
    div ecx
    mov ebx, 27*FP_1+FP_HALF
    sub ebx, eax
    mov playerY, ebx
    shr eax, 2
    neg eax
    add eax, FP_1*37/20
    mov viewEye3D, eax
    call UpdateCamera3D
    call RenderCeilingAndFloor
    call RenderWalls
    call PrepareCityDepth3D
    call RenderHall3D
    mov eax, oldX
    mov playerX, eax
    mov eax, oldY
    mov playerY, eax
    mov eax, oldAngle
    mov playerAngle, eax
    mov eax, oldMap
    mov worldMap3D, eax
    mov eax, oldEye
    mov viewEye3D, eax
    mov eax, oldCeiling
    mov viewCeiling3D, eax
    mov eax, oldLevel
    mov hallLevel3D, eax
    mov eax, oldFloor
    mov floorTexture3D, eax
    call UpdateCamera3D
    ret
RenderStairs3D ENDP

BuyBarDrink3D PROC drink:DWORD
    cmp barPhase3D, 0
    jne bar_buy_done
    mov ecx, drink
    cmp ecx, 2
    ja bar_buy_done
    mov eax, barPrice3D[ecx*4]
    cmp bankroll, eax
    jb bar_buy_poor
    sub bankroll, eax
    mov barSelection3D, ecx
    mov barPhase3D, 1
    mov barTime3D, 0
    call SaveProgress3D
    ret
bar_buy_poor:
    invoke CopyString3D, OFFSET barPoor3D, OFFSET flashMessage
    mov flashTimer, 150
bar_buy_done:
    ret
BuyBarDrink3D ENDP

HandleBar3D PROC uses ebx
    cmp barPhase3D, 0
    jne bar_animate
    mov ebx, 31h
bar_select_key:
    invoke Pressed3D, ebx
    test eax, eax
    jz @F
    mov eax, ebx
    sub eax, 31h
    invoke BuyBarDrink3D, eax
    ret
@@:
    inc ebx
    cmp ebx, 33h
    jbe bar_select_key
    cmp mouseClick3D, 0
    je bar_handle_done
    cmp mouseX3D, 170
    jb bar_handle_done
    cmp mouseY3D, 98
    jb bar_handle_done
    cmp mouseY3D, 155
    jae bar_handle_done
    mov eax, mouseY3D
    sub eax, 98
    xor edx, edx
    mov ecx, 19
    div ecx
    invoke BuyBarDrink3D, eax
    ret
bar_animate:
    mov eax, deltaTime3D
    add barTime3D, eax
    cmp barPhase3D, 1
    jne bar_after_drink
    cmp barTime3D, 3000
    jb bar_handle_done
    mov barPhase3D, 2
    mov barTime3D, 0
    ret
bar_after_drink:
    cmp barTime3D, 2400
    jb bar_handle_done
    mov ecx, barSelection3D
    mov eax, barStrength3D[ecx*4]
    test eax, eax
    jnz @F
    mov barIntoxication3D, 0
@@:
    add barIntoxication3D, eax
    cmp barIntoxication3D, 60000
    jbe @F
    mov barIntoxication3D, 60000
@@:
    mov barPhase3D, 0
    mov barTime3D, 0
bar_handle_done:
    ret
HandleBar3D ENDP

RenderBar3D PROC uses ebx
    local oldX:DWORD,oldY:DWORD,oldAngle:DWORD,oldHorizon:DWORD,oldEye:DWORD,oldMode:DWORD
    mov eax, playerX
    mov oldX, eax
    mov eax, playerY
    mov oldY, eax
    mov eax, playerAngle
    mov oldAngle, eax
    mov eax, viewHorizon3D
    mov oldHorizon, eax
    mov eax, viewEye3D
    mov oldEye, eax
    mov eax, engineMode
    mov oldMode, eax
    mov engineMode, MODE_BAR
    mov playerX, 6*FP_1
    mov playerY, 25*FP_1+FP_1/3
    mov playerAngle, 384
    mov viewHorizon3D, HALF_H
    mov viewEye3D, FP_1*17/20
    call UpdateCamera3D
    call RenderCeilingAndFloor
    call RenderWalls
    call PrepareCityDepth3D
    call RenderHall3D
    cmp barPhase3D, 0
    jne bar_active_scene
    invoke DrawBoxBorder, 170,83,146,86,0017201Bh,00836D42h,1
    invoke DrawString8x8, 174,99,OFFSET barDrinks3D,00E4D9BDh
    invoke DrawString8x8, 174,118,OFFSET barDrinks23D,00E4D9BDh
    invoke DrawString8x8, 174,137,OFFSET barDrinks33D,00BCD7D0h
    jmp bar_draw_title
bar_active_scene:
    mov ebx, OFFSET barMixText3D
    cmp barPhase3D, 2
    jne @F
    mov ebx, OFFSET barDrinkText3D
@@:
    invoke DrawBox,170,83,146,24,0017201Bh
    invoke DrawString8x8,176,91,ebx,00E7CA88h
bar_draw_title:
    invoke DrawBox,0,0,320,28,0014191Dh
    invoke DrawString8x8, 18,15,OFFSET barName3D,00E7CA88h
    cmp barPhase3D, 2
    jne bar_render_done
    mov eax, barTime3D
    xor edx, edx
    mov ecx, 343
    div ecx
    cmp eax, 6
    jbe @F
    mov eax, 6
@@:
    mov ecx, barSelection3D
    imul ecx, 7
    add eax, ecx
    invoke DrawAnimSprite3D, OFFSET hallDrink3D,eax,272,170,360,360
bar_render_done:
    invoke DrawNumber,240,15,bankroll,00E5D6B0h
    mov eax, oldX
    mov playerX, eax
    mov eax, oldY
    mov playerY, eax
    mov eax, oldAngle
    mov playerAngle, eax
    mov eax, oldHorizon
    mov viewHorizon3D, eax
    mov eax, oldEye
    mov viewEye3D, eax
    mov eax, oldMode
    mov engineMode, eax
    call UpdateCamera3D
    ret
RenderBar3D ENDP

RenderCityGuards3D PROC uses ebx
    mov eax, cityClock3D
    xor edx, edx
    mov ecx, 180
    div ecx
    and eax, 7
    mov cityGuardLeft3D.frame, eax
    cmp arrivalState3D, ARRIVAL_WALK
    je city_world_guard_right
    mov cityGuardLeft3D.frame, 15
    cmp arrivalState3D, ARRIVAL_STOP
    jne city_world_guard_invite
    mov eax, arrivalTime3D
    xor edx, edx
    mov ecx, 90
    div ecx
    cmp eax, 7
    jbe @F
    mov eax, 7
@@:
    add eax, 8
    mov cityGuardLeft3D.frame, eax
    jmp city_world_guard_right
city_world_guard_invite:
    cmp arrivalState3D, ARRIVAL_ADMIT
    jb city_world_guard_right
    mov eax, arrivalTime3D
    xor edx, edx
    mov ecx, 120
    div ecx
    add eax, 16
    cmp eax, 22
    jbe @F
    mov eax, 22
@@:
    mov cityGuardLeft3D.frame, eax
city_world_guard_right:
    mov eax, cityClock3D
    add eax, 590
    xor edx, edx
    mov ecx, 220
    div ecx
    and eax, 7
    cmp arrivalState3D, ARRIVAL_PROFILE
    jne @F
    add eax, 24
@@:
    mov cityGuardRight3D.frame, eax
    invoke DrawCityObject3D, OFFSET cityGuardLeft3D,0
    invoke DrawCityObject3D, OFFSET cityGuardRight3D,0
    ret
RenderCityGuards3D ENDP

CanWalkHall3D PROC px:DWORD,py:DWORD
    cmp hallLevel3D, 0
    jne hall_collision_bunker
    ; Stage and wings are solid: the audience stays in the cabaret's front aisle.
    cmp px, 10*FP_1-9830
    jl hall_collision_stage_clear
    cmp px, 22*FP_1+9830
    jg hall_collision_stage_clear
    cmp py, 2*FP_1-9830
    jl hall_collision_stage_clear
    cmp py, 5*FP_1+9830
    jle hall_collision_blocked
hall_collision_stage_clear:
    cmp px, FP_1*47/4
    jl hall_collision_cabinets
    cmp px, FP_1*49/4
    jg hall_collision_pool_divider
    cmp py, 24*FP_1-9830
    jl hall_collision_cabinets
    cmp py, FP_1*51/2+9830
    jle hall_collision_blocked
    cmp py, FP_1*55/2-9830
    jl hall_collision_cabinets
    cmp py, 30*FP_1+9830
    jle hall_collision_blocked
hall_collision_pool_divider:
    cmp px, 23*FP_1-9830
    jl hall_collision_cabinets
    cmp px, FP_1*116/5+9830
    jg hall_collision_cabinets
    cmp py, 23*FP_1-9830
    jl hall_collision_cabinets
    cmp py, 24*FP_1+9830
    jle hall_collision_blocked
    cmp py, 26*FP_1-9830
    jl hall_collision_cabinets
    cmp py, 29*FP_1+9830
    jle hall_collision_blocked
hall_collision_cabinets:
    ; The work aisle is staff-only; player interaction is from the serving side.
    cmp px, 3*FP_1-9830
    jl hall_collision_counter
    cmp px, 9*FP_1+9830
    jg hall_collision_counter
    cmp py, 21*FP_1-9830
    jl hall_collision_counter
    cmp py, 24*FP_1+9830
    jle hall_collision_blocked
hall_collision_counter:
    cmp px, 3*FP_1-9830
    jl hall_collision_dining
    cmp px, 9*FP_1+9830
    jg hall_collision_pool
    cmp py, 23*FP_1-9830
    jl hall_collision_clear
    cmp py, 24*FP_1+9830
    jg hall_collision_dining
    xor eax, eax
    ret
hall_collision_pool:
    cmp px, 26*FP_1-9830
    jl hall_collision_dining
    cmp px, 28*FP_1+9830
    jg hall_collision_dining
    cmp py, 24*FP_1-9830
    jl hall_collision_clear
    cmp py, 26*FP_1+9830
    jg hall_collision_dining
    xor eax, eax
    ret
hall_collision_bunker:
    cmp px, 14*FP_1-9830
    jl hall_collision_clear
    cmp px, 20*FP_1+9830
    jg hall_collision_clear
    cmp py, 14*FP_1-9830
    jl hall_collision_clear
    cmp py, 15*FP_1+9830
    jg hall_collision_clear
hall_collision_blocked:
    xor eax, eax
    ret
hall_collision_clear:
    mov eax, 1
    ret
hall_collision_dining:
    cmp py, 26*FP_1+FP_1/3
    jl hall_collision_clear
    cmp py, 29*FP_1+FP_HALF
    jg hall_collision_clear
    cmp px, 2*FP_1
    jl hall_collision_clear
    cmp px, 5*FP_1
    jle hall_collision_blocked
    cmp px, 8*FP_1
    jl hall_collision_clear
    cmp px, 11*FP_1
    jle hall_collision_blocked
    jmp hall_collision_clear
CanWalkHall3D ENDP

RenderCityFacade3D PROC uses ebx esi
    ; The original entrance artwork carries CASINO itself, mapped once across the doorway.
    invoke DrawCityBoxSides3D,21*FP_1,24*FP_1,8*FP_1,8*FP_1+FP_1/5,0,FP_1*9/5,57
    invoke DrawCityVertical3D,1,8*FP_1+FP_1/5,21*FP_1,24*FP_1,0,FP_1*9/5,58
    invoke DrawCityBoxSides3D,FP_1*104/5,FP_1*106/5,8*FP_1,8*FP_1+FP_1*2/5,0,2*FP_1,103
    invoke DrawCityBoxSides3D,FP_1*119/5,FP_1*121/5,8*FP_1,8*FP_1+FP_1*2/5,0,2*FP_1,103
    invoke DrawCityBoxSides3D,FP_1*104/5,FP_1*121/5,8*FP_1,8*FP_1+FP_HALF,FP_1*9/5,2*FP_1,86
    invoke DrawCityHorizontal3D,FP_1*104/5,FP_1*121/5,8*FP_1,8*FP_1+FP_HALF,2*FP_1,85
    invoke DrawCityVertical3D,1,8*FP_1+FP_1*41/100,FP_1*101/5,FP_1*104/5,FP_1,FP_1*8/5,105
    invoke DrawCityVertical3D,1,8*FP_1+FP_1*41/100,FP_1*121/5,FP_1*124/5,FP_1,FP_1*8/5,105
    ; Recessed street windows, projecting bays and ledges are fixed world surfaces.
    mov esi, 11
hall_city_pilaster:
    cmp esi, 20
    je hall_city_next_pilaster
    cmp esi, 24
    je hall_city_next_pilaster
    mov ebx, esi
    shl ebx, 16
    lea eax, [ebx+FP_1/5]
    invoke DrawCityBoxSides3D, ebx,eax,12*FP_1,12*FP_1+FP_1/6,0,5*FP_1,57
    lea eax, [ebx+FP_1/5]
    invoke DrawCityBoxSides3D, ebx,eax,17*FP_1-FP_1/6,17*FP_1,0,5*FP_1,57
    lea eax, [ebx+FP_1/5]
    lea edx, [ebx+FP_1*7/5]
    invoke DrawCityBoxSides3D,eax,edx,FP_1*237/20,12*FP_1,FP_1/20,FP_1*13/10,57
    lea eax, [ebx+FP_1/5]
    lea edx, [ebx+FP_1*7/5]
    invoke DrawCityVertical3D,1,12*FP_1+FP_1/25,eax,edx,FP_1/20,FP_1*13/10,62
    lea eax, [ebx+FP_1/5]
    lea edx, [ebx+FP_1*7/5]
    invoke DrawCityBoxSides3D,eax,edx,12*FP_1,12*FP_1+FP_1/5,2*FP_1,FP_1*18/5,57
    lea eax, [ebx+FP_1/5]
    lea edx, [ebx+FP_1*7/5]
    invoke DrawCityVertical3D,1,12*FP_1+FP_1/5,eax,edx,2*FP_1,FP_1*18/5,106
    lea eax, [ebx+FP_1/5]
    lea edx, [ebx+FP_1*7/5]
    invoke DrawCityBoxSides3D,eax,edx,17*FP_1-FP_1/4,17*FP_1,2*FP_1,FP_1*18/5,57
    lea eax, [ebx+FP_1/5]
    lea edx, [ebx+FP_1*7/5]
    invoke DrawCityVertical3D,1,17*FP_1-FP_1/4,eax,edx,2*FP_1,FP_1*18/5,106
hall_city_next_pilaster:
    add esi, 4
    cmp esi, 29
    jb hall_city_pilaster
    ret
RenderCityFacade3D ENDP

UpdateHall3D PROC
    call UpdatePatrons3D
    mov viewHorizon3D, HALF_H
    mov viewEye3D, FP_1*17/20
    cmp hallLevel3D, 0
    je @F
    mov eax, playerY
    sub eax, 24*FP_1
    jle @F
    shr eax, 2
    cmp eax, FP_1
    jbe hall_step_eye
    mov eax, FP_1
hall_step_eye:
    add viewEye3D, eax
@@:
    cmp barIntoxication3D, 0
    je hall_update_done
    mov eax, deltaTime3D
    imul eax, 2
    sub barIntoxication3D, eax
    jnc @F
    mov barIntoxication3D, 0
@@:
    mov eax, animationClock3D
    shr eax, 3
    and eax, 511
    mov eax, tableSin[eax*4]
    imul barIntoxication3D
    shrd eax, edx, 16
    sar eax, 14
    add viewHorizon3D, eax
hall_update_done:
    ret
UpdateHall3D ENDP

; Absolute route phase avoids accumulated movement drift and keeps walking FPS-independent.
UpdatePatrons3D PROC uses ebx esi edi
    local wx:DWORD,wy:DWORD,phase:DWORD
    cmp hallLevel3D, 0
    jne patron_update_done
    mov eax, deltaTime3D
    add eax, patronClock3D
    xor edx, edx
    mov ecx, 20000
    div ecx
    mov patronClock3D, edx
    xor esi, esi
patron_update_loop:
    mov eax, esi
    imul eax, 10000
    add eax, patronClock3D
    xor edx, edx
    mov ecx, 20000
    div ecx
    mov eax, edx
    xor edx, edx
    mov ecx, 5000
    div ecx
    mov phase, eax
    mov eax, edx
    imul eax, 4*FP_1
    xor edx, edx
    div ecx
    mov wx, 18*FP_1
    mov wy, 18*FP_1
    cmp phase, 0
    jne patron_route_south
    add wx, eax
    jmp patron_route_check
patron_route_south:
    cmp phase, 1
    jne patron_route_west
    mov wx, 22*FP_1
    shr eax, 1
    add wy, eax
    jmp patron_route_check
patron_route_west:
    mov wy, 20*FP_1
    cmp phase, 2
    jne patron_route_north
    mov wx, 22*FP_1
    sub wx, eax
    jmp patron_route_check
patron_route_north:
    shr eax, 1
    sub wy, eax
patron_route_check:
    invoke CanWalk3D,wx,wy
    test eax, eax
    jz patron_update_next
    imul ebx, esi, SIZEOF CityProp3D
    mov eax, wx
    mov hallGuests3D[ebx].posX, eax
    mov eax, wy
    mov hallGuests3D[ebx].posY, eax
    mov eax, patronClock3D
    xor edx, edx
    mov ecx, 220
    div ecx
    and eax, 3
    lea eax, [eax+esi*4]
    mov hallGuests3D[ebx].frame, eax
patron_update_next:
    inc esi
    cmp esi, 2
    jb patron_update_loop
patron_update_done:
    ret
UpdatePatrons3D ENDP

RenderPatrons3D PROC uses esi
    xor esi, esi
patron_render_loop:
    imul eax, esi, SIZEOF CityProp3D
    add eax, OFFSET hallGuests3D
    invoke DrawCityObject3D,eax,0
    inc esi
    cmp esi, HALL_PATRON_COUNT
    jb patron_render_loop
    ret
RenderPatrons3D ENDP