lentil/gravity
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tweaks

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Ladd 2025-12-28 03:16:58 -06:00
parent 59bf820081
commit 0319df06cc
2 changed files with 17 additions and 16 deletions
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2
display.js
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@ -109,7 +109,7 @@ export class Display {
ctx.beginPath();
let dash = false;
for (let i = 0; i < obj.history.length ; i++) {
// if (i % 2) continue;
// if (i % 2 > 0) continue;
const {position: {x, y}} = obj.history[i];
if (dashedTraces) {
if (dash) {

31
pointer.js
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@ -14,7 +14,7 @@ export class Pointer {
pointerHistory = [];
draggingElement = undefined;
panning = undefined;
panning = undefined; // { velocity: {x and y in sim coordinates}, paused: boolean }
panTouchStart = undefined; // {x: undefined, y: undefined, t: undefined};
panTouchLatest = undefined; // {x: undefined, y: undefined, t: undefined};
suppressClick = false;
@ -133,15 +133,15 @@ export class Pointer {
handlePointerDown({x: clientX, y: clientY}) {
this.clearPointerHistory(5);
this.updatePointer({x: clientX, y: clientY});
const {x, y} = this.sim.screenToSim(clientX, clientY)
if (this.sim.isCurrentMode(MODE_MASS_GENERATION)) {
const {x, y} = this.sim.screenToSim(clientX, clientY)
this.sim.objects.handlePointerDown({x, y});
} else if (this.sim.isCurrentMode(MODE_PAN_VIEW)) {
this.panTouchStart = {
x,
y,
x: clientX,
y: clientY,
t: document.timeline.currentTime,
viewOrigin: {...this.sim.display.viewOrigin},
};
@ -160,12 +160,15 @@ export class Pointer {
} else if (this.sim.isCurrentMode(MODE_PAN_VIEW)) {
// Set panning velocity
if (this.panTouchStart && this.panTouchLatest) {
const dt = this.panTouchLatest.t - this.panTouchStart.t;
const current = this.panning?.velocity;
const dt = (this.panTouchLatest.t - this.panTouchStart.t) / 1000;
const latest = this.panTouchLatest;
const start = this.panTouchStart;
// const speed = Math.sqrt((latest.x - start.x)**2 + (latest.y - start.y)**2) / dt;
const { scale } = this.sim.display;
this.panning = {
velocity: {
x: (current?.x ?? 0) + (this.panTouchLatest.x - this.panTouchStart.x) / dt,
y: (current?.y ?? 0) + (this.panTouchLatest.y - this.panTouchStart.y) / dt,
x: 2 * (latest.x - start.x) / scale / dt,
y: 2 * (latest.y - start.y) / scale / dt,
}
};
this.panTouchStart = undefined;
@ -186,18 +189,16 @@ export class Pointer {
// v.x = v.x + a.x * v.dt / this.sim.display.scale / 2;
// v.y = v.y + a.y * v.dt / this.sim.display.scale / 2;
const {x, y} = this.sim.screenToSim(clientX, clientY);
if (this.sim.isCurrentMode(MODE_MASS_GENERATION)) {
const {x, y} = this.sim.screenToSim(clientX, clientY);
this.sim.objects.handlePointerMove({x, y, vx: v.x, vy: v.y});
} else if (this.sim.isCurrentMode(MODE_PAN_VIEW)) {
// Event loop should be able to read
this.panTouchLatest = {
x,
y,
x: clientX,
y: clientY,
t: document.timeline.currentTime,
viewOrigin: {...this.sim.display.viewOrigin},
};
}
}
@ -212,8 +213,8 @@ export class Pointer {
// Direct translate
const start = this.panTouchStart;
const latest = this.panTouchLatest;
this.sim.display.viewOrigin.x -= latest.x - start.x;
this.sim.display.viewOrigin.y -= latest.y - start.y;
this.sim.display.viewOrigin.x = start.viewOrigin.x - (latest.x - start.x) / this.sim.display.scale;
this.sim.display.viewOrigin.y = start.viewOrigin.y - (latest.y - start.y) / this.sim.display.scale;
} else if (this.panning && !this.panning.paused) {
// Apply update to viewOrigin based on panning
const { velocity } = this.panning;