Every transport piece moves material at belt speed and capacity (t105)

docs/PROJECT_MAP.md

@@ -259,7 +259,7 @@ Exploration only: never changes grains or the random stream.
 - functions: fogAlloc, fogMark, fogSeen, fogInit, fogLook, fogRevealAround, fogRevealAll
 - variables: FOG, FOG_SENSE, FOG_SENSE_FADE, fog, FW, FH
 
-### src/sim/cells.js (322 lines)
+### src/sim/cells.js (332 lines)
 Cell helpers (setCell, move, enter) and the falling-sand movement of powders, liquids and gases (simMove).
 - functions: setCell, swapCells, swapCellData, move, enter, enterFree, powderOpen, powderFall, powderSpill, avalancheMove, powder, passable, liquid, liquidSearch, gas, wakeBotPowder, simMove, moveChunk
 - variables: SORTP, SORTP_FUEL, LSTEP, LFILM, CORNER_SEAL, POWDER_FAN
@@ -269,7 +269,7 @@ Heat: conduction, melting and freezing, reactions, fire and air, steel.
 - functions: curAir, airflowAt, alloyMix, airy, hasO2, condPair, heatPass, heatChunk, neighborDir, react, char, quench, burningNear, burn, steelCheck
 - variables: POROUS, SOIL, HOTLIQ, REACT_MIN, ALLOY
 
-### src/sim/machines.js (157 lines)
+### src/sim/machines.js (179 lines)
 Machines: the power network, footprints, placing and removing machines.
 - functions: markPow, partLost, rebuildPower, netSat, evictCells, cellBuildable, machineFootprint, canPlaceMachine, addMachine, removeMachine
 - variables: nextPowerBuild
@@ -289,7 +289,7 @@ Pipes, pumps and outlets: each joined line holds one liquid as a count, not as g
 - functions: sideOf, pipeClosedSide, pipeJoins, rebuildPipes, pipeNetOf, pipeTakeShare, faceCell, pumpDraw, outletPour, pipesTick
 - variables: PIPE_CAP, PUMP_RATE, OUTLET_RATE, PUMP_MAX_T, SIDE_V, PUMP_V, OUTLET_V, pipeNets, pipeNetAt, pipesDirty
 
-### src/sim/machine-tick.js (160 lines)
+### src/sim/machine-tick.js (97 lines)
 Per-tick machine work: steam engines, fans, belts, filters, screw conveyors (machinesTick).
 - functions: engineIntake, fanBlow, machinesTick
 
@@ -298,25 +298,25 @@ Travel-directed transport ends. Precomputed probes; world/plan queries allocate
 - functions: pieceEnds, joinCandidate, endJoin, pieceJoins, endAt, joinIsDrop, joinSnap, nearMiss
 - variables: JOIN_ENDS, NO_PIECE, NEAR_MISS_VIEW
 
-### src/sim/conveyors.js (215 lines)
-How belts, filters and screw conveyors move what is on or in them. What rests on a belt or filter rides along: the bottom four grains standing on the carrying surface steps one cell toward d together (belts run front of the line first, so the way ahead is clear). If a powder grain is blocked, the load above it stands still and the belt slips underneath. A filter's own material drops through it instead, unless it is already full.
-- functions: conveyorStep, carryColumn, beltDrain, launchGrain, rebuildFilters, filterCarry, carryBeltsAndFilters, setFilter, filterRun, roomFor, screwSpread, screwIntake, screwAccepts, straightScrewNext, diagonalScrewNext
-- variables: CARRY_DEPTH, filterR, filterL, filtersDirty
+### src/sim/conveyors.js (344 lines)
+How belts, filters and screw conveyors move what is on or in them. What rests on a belt or filter rides along: the bottom four grains standing on the carrying surface steps one cell toward d together (belts run front of the line first, so the way ahead is clear). If a powder grain is blocked, the load above it stands still and the belt slips underneath. A filter's own material drops through it instead, unless it is already full. Six vertical grains give a 45° face roughly the same depth across its path.
+- functions: conveyorStep, carryColumn, beltDrain, launchGrain, rebuildFilters, filterCarry, carryBeltsAndFilters, setFilter, filterRun, roomFor, screwSpread, transportBed, screwIntake, screwAccepts, straightScrewNext, diagonalScrewNext, screwCarry
+- variables: CARRY_DEPTH, SLOPE_CARRY_DEPTH, filterR, filterL, filtersDirty, screwCarryR, screwCarryL
 
 ### src/sim/flow.js (26 lines)
 Throughput for the info overlay (t49): how many grains each belt, filter and screw conveyor block hands on, per second of game time. Counting runs only while the overlay is on, so normal play pays one flag check per carried grain. Bars are not counted.
 - functions: setFlowCounting, flowNote, flowCross, flowSlopeUnder, flowTick
 - variables: flowOn, flowCount, flowRate
 
-### src/sim/transport-status.js (38 lines)
+### src/sim/transport-status.js (39 lines)
 Local backpressure: only loaded transport that cannot advance warns after half a second.
 - functions: transportNote, transportStalled, transportClock, transportBegin, transportEnd, transportCleat, transportBar
 - variables: STALL_TICKS, transportState
 
-### src/sim/slope-conveyors.js (237 lines)
+### src/sim/slope-conveyors.js (232 lines)
 Cleats are rubber ribs standing up from a sloped belt's face, one every CLEAT_SPACING face cells. Loose grains treat them as solid (cleatMask). Nothing grips the bare face: grains slide down it until a cleat stops them. Each belt step moves every cleat one face cell along the belt, and the rib pushes whatever is in its way ahead of it, so the pocket in front rides along while anything heaped above the rib is left to roll back. If a rib can't push its way, its whole run stalls. Only uphill runs have cleats: downhill, the belt carries its load like a flat one.
-- functions: ribMove, cleatFoot, ribCells, slopeUphill, slopeFaceAt, pushRow, scoop, pocketRoom, advanceCleat, slopeRunKey, slopeCleatsTick, rebuildCleatMask, expelFromRib, screenNudge, wakeCleatLoad
-- variables: CLEAT_SPACING, CLEAT_HEIGHT, CLEAT_REACH, SCREEN_NUDGE_TICKS, cleatChunks, cleatMask, cleatCells, slopePhase, ribLog
+- functions: diagonalBeat, ribMove, cleatFoot, ribCells, slopeUphill, slopeFaceAt, pushRow, scoop, pocketRoom, advanceCleat, slopeRunKey, slopeCleatsTick, rebuildCleatMask, expelFromRib, screenNudge, wakeCleatLoad
+- variables: CLEAT_SPACING, CLEAT_HEIGHT, CLEAT_REACH, cleatChunks, cleatMask, cleatCells, slopePhase, ribLog
 
 ### src/sim/blocks.js (268 lines)
 Building blocks: placing, integrity, removing, lines and rectangles of blocks.
@@ -701,6 +701,7 @@ The frame loop and boot.
 - `test/t_stalls.py`: t45: real transport warnings, hover, frozen animation and recovery in both looks.
 - `test/t_stone.js`: Uses for waste rock and sand: glass bricks from a fan furnace, the Saw, the silo and builders' orders.
 - `test/t_threads.js`: Shared allocation, checkerboard independence, and real worker-count determinism.
+- `test/t_transport_balance.js`: t105: compare every direction with the unchanged t45 belt and exercise the complete line.
 - `test/t_vacuum_collapse.js`: Real nozzle cuts into settled heaps, inline and through the real Node worker pool.
 - `test/t_vacuum_collapse.py`: Vacuum cuts in the real pixel frame loop with active browser workers and hardware graphics.
 - `test/t_water.js`: Water conservation, settling, ledge pouring, boundaries, pipes and phase changes. Tall worlds keep geothermal heat out of the ponds.
@@ -729,6 +730,7 @@ The frame loop and boot.
 - `tools/experiments/slope-flow.js`: Reproducible generous-feed throughput and settled pile angles for t42.
 - `tools/experiments/smelter.js`: Smelter design experiments, built with the same block pieces a player uses. Layout (block rows, 4x4 grains each), on flat ground at row 25: roof with a vent ........ row g-CH-1 chamber, CH blocks tall .. charge of coal + copper ore inside grate floor ............. row g = 23 (liquids pass, powders do not) ingot mold .............. row 24, sitting on the ground side walls run from the roof down past the mold. Usage: node t_smelter.js [key=value ...]
 - `tools/experiments/starter.js`: Plays a starter design the way a player would: paste the blueprint, let the bot build it from the bag, blow an even ore/coal mix inside, light it, wait, knock out the castings. Usage: node tools/experiments/starter.js [design id] [ore] [coal]
+- `tools/experiments/transport-balance.js`: t105: same belt feed, open sink, central single-grain/bar travel. Run with node.
 - `tools/experiments/worldgen.js`: World generation report: time to generate, how many cells of each material, where the bot starts, and what idle ticks and ticks after digging cost.
 - `tools/scenes/bar-lift.js`: A mold drops copper bars onto a belt, through a screw lift and onto the upper belt.
 - `tools/scenes/belt-heap.js`: A belt feeding an upward screw: sand underneath a deep heap of copper ore. Run clear-sky.js first, e.g. python3 tools/shot.py /tmp/belt-heap.png --setup tools/scenes/clear-sky.js --js "$(cat tools/scenes/belt-heap.js)" --ticks 240 --zoom 7
@@ -739,6 +741,7 @@ The frame loop and boot.
 - `tools/scenes/slope-conveyors.js`: Loaded sidewall conveyor and screen. Use --js 'slopeScene(false)' (belt) or 'slopeScene(true)' (screen).
 - `tools/scenes/stone-uses.js`: The stone and sand machines: a half-full silo with its gate open over a belt, a stone cutter fed with rubble, and cut stone and glass brick walls. Run clear-sky.js first, e.g. python3 tools/shot.py /tmp/stone.png --setup tools/scenes/clear-sky.js --js "$(cat tools/scenes/stone-uses.js)" --ticks 240 --zoom 7
 - `tools/scenes/t-screen-joint.js`: Downhill screen whose outlet belt sits level with its last block (the jam the owner saw).
+- `tools/scenes/t105-chain.js`: Load test/fixtures/t105-transport.js first. The measured chain, running at heavy feed.
 - `tools/scenes/t33-ground.js`: Paused dug pocket: copper ore, rubble and dirt against stone, granite and dirt. Use --js "..." to set daylight or R.lens after this setup; CAM frames the pocket.
 - `tools/scenes/t35-diagonal.js`: Run after clear-sky.js: a belt takes sand from a pile, up a diagonal screw to an upper belt.
 - `tools/scenes/t35-joins.js`: Run after clear-sky.js. Paused, empty pipes make casing, flights and mouths easy to inspect.