31 lines
1.2 KiB
C++
31 lines
1.2 KiB
C++
#pragma once
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#include <vector>
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#include <QPoint>
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#include <QPointF>
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#include "Item.h"
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#include "Rotation.h"
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// A single item on a belt-like lane: an item plus its fractional progress along
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// the lane's travel direction. Shared by BeltSystem's belt/tunnel tiles and by a
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// building's virtual output belt (REQ-MAT-OUTPUT-EMERGE) so the packing and
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// geometry live in exactly one place.
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struct BeltItemSlot
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{
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Item item;
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double progress; // [0.0, 1.0]: 0 = just entered, 1 = at output edge
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};
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// Advances every slot in `slots` by `progressPerTick`, applying the standard belt
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// packing: the front (index 0) carries the highest progress; each following slot
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// stays at least 0.25 behind the slot ahead and is capped at 1.0 - i * 0.25.
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// `slots` must be ordered front (highest progress) first. This is the per-tile
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// advance shared by belts, tunnel entries, and tunnel exits.
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void advanceBeltSlots(std::vector<BeltItemSlot>& slots, double progressPerTick);
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// World-space centre (in tile units) of a slot at `progress` on a lane occupying
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// `tile` and flowing in `dir`. Progress 0 = entry edge, 1 = output edge.
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QPointF beltSlotWorldPos(QPoint tile, Rotation dir, double progress);
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