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Major correction to explor. spaces 4.5
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dist/demo/articles/exploring_spaces_4_and_a_half/dragging1.js
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,76 @@ | ||
| import { add, angleOf, length, setAngle, setLength, sub, } from "../../../lib/math/Vec2.js"; | ||
| import { swapActive } from "./draggingCircle.js"; | ||
| function makeDraggable(state, el, ...clones) { | ||
| let pos = [0, 0]; | ||
| let dragging = null; | ||
| // modified from https://www.redblobgames.com/making-of/draggable/ | ||
| function start(event) { | ||
| if (event.button !== 0) | ||
| return; // left button only | ||
| let { x, y } = state.eventToCoordinates(event); | ||
| dragging = [pos[0] - x, pos[1] - y]; | ||
| el.classList.add("dragging"); | ||
| for (const clone of clones) | ||
| clone.classList.add("dragging"); | ||
| el.setPointerCapture(event.pointerId); | ||
| } | ||
| function end(_event) { | ||
| dragging = null; | ||
| el.classList.remove("dragging"); | ||
| for (const clone of clones) | ||
| clone.classList.remove("dragging"); | ||
| } | ||
| function move(event) { | ||
| if (dragging === null) | ||
| return; | ||
| let { x, y } = state.eventToCoordinates(event); | ||
| const newPos = [x + dragging[0], y + dragging[1]]; | ||
| const diff = sub(newPos, pos); | ||
| pos = newPos; | ||
| state.movePos(diff); | ||
| } | ||
| el.addEventListener("pointerdown", start); | ||
| el.addEventListener("pointerup", end); | ||
| el.addEventListener("pointercancel", end); | ||
| el.addEventListener("pointermove", move); | ||
| el.addEventListener("touchstart", (e) => e.preventDefault()); | ||
| } | ||
| function eventToSvgCoordinates(event, el = event.currentTarget) { | ||
| const svg = el.ownerSVGElement; | ||
| let p = svg.createSVGPoint(); | ||
| p.x = event.clientX; | ||
| p.y = event.clientY; | ||
| p = p.matrixTransform(svg.getScreenCTM().inverse()); | ||
| return p; | ||
| } | ||
| const v2 = ({ x, y }) => [x, y]; | ||
| const xy = ([x, y]) => ({ | ||
| x, | ||
| y, | ||
| }); | ||
| const reverse = (v) => setLength(100 - length(v), setAngle(angleOf(v) + Math.PI)(v)); | ||
| // Make the circle draggable only to the snap points | ||
| const el = document.querySelector("#dragging1 circle.draggable"); | ||
| const clone = document.querySelector("#dragging1 circle.clone"); | ||
| export const rp2State = { | ||
| eventToCoordinates: eventToSvgCoordinates, | ||
| dragging: null, | ||
| pos: [0, 0], | ||
| movePos(v) { | ||
| this.setPos(add(this.pos, v)); | ||
| }, | ||
| setPos(p) { | ||
| this.pos = p; | ||
| if (length(p) > 50) { | ||
| this.pos = reverse(p); | ||
| swapActive(); | ||
| } | ||
| const cpos = reverse(this.pos); | ||
| clone?.setAttribute("cx", cpos[0]); | ||
| clone?.setAttribute("cy", cpos[1]); | ||
| el?.setAttribute("cx", this.pos[0]); | ||
| el?.setAttribute("cy", this.pos[1]); | ||
| }, | ||
| }; | ||
| makeDraggable(rp2State, el, clone); | ||
| makeDraggable(rp2State, clone, el); |
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77 changes: 77 additions & 0 deletions
77
dist/demo/articles/exploring_spaces_4_and_a_half/draggingCircleOld.js
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,77 @@ | ||
| import { saxis } from "./draggingSphereUsage.js"; | ||
| const mod = (a, n, nL = 0) => ((((a - nL) % (n - nL)) + (n - nL)) % (n - nL)) + nL; | ||
| function makeDraggable(state, el) { | ||
| // from https://www.redblobgames.com/making-of/draggable/ | ||
| let pos = 0; | ||
| let dragging = null; | ||
| // modified from https://www.redblobgames.com/making-of/draggable/ | ||
| function start(event) { | ||
| if (event.button !== 0) | ||
| return; // left button only | ||
| let { x, y } = state.eventToCoordinates(event); | ||
| dragging = pos - y; | ||
| el.classList.add("dragging"); | ||
| // for (const clone of clones) clone.classList.add("dragging"); | ||
| el.setPointerCapture(event.pointerId); | ||
| } | ||
| function end(_event) { | ||
| dragging = null; | ||
| el.classList.remove("dragging"); | ||
| // for (const clone of clones) clone.classList.remove("dragging"); | ||
| } | ||
| function move(event) { | ||
| if (dragging === null) | ||
| return; | ||
| let { x, y } = state.eventToCoordinates(event); | ||
| const newPos = y + dragging; | ||
| const diff = newPos - pos; | ||
| pos = newPos; | ||
| state.movey(diff); | ||
| } | ||
| el.addEventListener("pointerdown", start); | ||
| el.addEventListener("pointerup", end); | ||
| el.addEventListener("pointercancel", end); | ||
| el.addEventListener("pointermove", move); | ||
| el.addEventListener("touchstart", (e) => e.preventDefault()); | ||
| } | ||
| function eventToSvgCoordinates(event, el = event.currentTarget) { | ||
| const svg = el.ownerSVGElement; | ||
| let p = svg.createSVGPoint(); | ||
| p.x = event.clientX; | ||
| p.y = event.clientY; | ||
| p = p.matrixTransform(svg.getScreenCTM().inverse()); | ||
| return p; | ||
| } | ||
| const makeIt = (el, width, f) => { | ||
| let state = { | ||
| eventToCoordinates: eventToSvgCoordinates, | ||
| dragging: null, | ||
| _y: undefined, | ||
| _pos: undefined, | ||
| get y() { | ||
| return this._y; | ||
| }, | ||
| movey(n) { | ||
| this.sety(this._y + n); | ||
| }, | ||
| sety(n) { | ||
| this._y = n; | ||
| el.setAttribute("cy", mod(this._y, 0, width)); | ||
| try { | ||
| f(this._y); | ||
| } | ||
| catch (e) { } | ||
| }, | ||
| }; | ||
| state.sety(20); | ||
| makeDraggable(state, el); | ||
| return state; | ||
| }; | ||
| const s1 = makeIt(document | ||
| .querySelector(".circle-input-old") | ||
| .querySelector(".draggable-circle-old"), 200, (y) => { | ||
| try { | ||
| saxis.radius(Math.abs(mod(y + 100, -100, 100)) / 2 + 6); | ||
| } | ||
| catch (e) { } | ||
| }); |
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