51 lines
1.5 KiB
JavaScript
51 lines
1.5 KiB
JavaScript
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// Junction.js
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const connectedPairs = [
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[[-1, 0], [1, 0]], // Horizontal
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[[0, -1], [0, 1]] // Vertical
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];
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let isRisingEdge = (current, prev) => current === 2 && prev !== 2;
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let isFallingEdge = (current, prev) => current !== 2 && prev === 2;
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elements.junction = {
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color: "#9db8b5",
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category: "logic",
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state: "solid",
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behavior: behaviors.WALL,
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tick: function (pixel) {
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if (pixel.start === pixelTicks)
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pixel.prevStateMap = {};
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for (const pair of connectedPairs) {
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let pixelA = pixelMap[pixel.x + pair[0][0]]?.[pixel.y + pair[0][1]];
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let pixelB = pixelMap[pixel.x + pair[1][0]]?.[pixel.y + pair[1][1]];
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if (!pixelA) continue;
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if (!pixelB) continue;
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if (pixelA.element !== "logic_wire") continue;
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if (pixelB.element !== "logic_wire") continue;
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let stateA = pixelA.lstate;
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let stateB = pixelB.lstate;
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let prevStateA = pixel.prevStateMap[[pixelA.x, pixelA.y]];
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let prevStateB = pixel.prevStateMap[[pixelB.x, pixelB.y]];
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// console.log("A:", stateA, "->", prevStateA);
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// console.log("B:", stateB, "->", prevStateB);
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// Set previous lstate to current lstate
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pixel.prevStateMap[[pixelA.x, pixelA.y]] = pixelA.lstate;
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pixel.prevStateMap[[pixelB.x, pixelB.y]] = pixelB.lstate;
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// Rising edge
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if (isRisingEdge(stateA, prevStateA)) pixelB.lstate = 2;
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if (isRisingEdge(stateB, prevStateB)) pixelA.lstate = 2;
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// Falling edge
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if (isFallingEdge(stateA, prevStateA)) pixelB.lstate = -2;
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if (isFallingEdge(stateB, prevStateB)) pixelA.lstate = -2;
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}
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}
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};
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