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WIP: Velocity while in contact with edge

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Catalin Constantin Mititiuc
2026-01-20 16:46:10 -08:00
parent ac9684f4cf
commit 2e17234daf
1 changed files with 15 additions and 68 deletions
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83
html/images/space.svg
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@@ -125,7 +125,7 @@
<!-- <polygon class="wall" points="-10,50 -3,50 -3,60 -10,60" /> -->
<!-- <polygon class="wall" points="20,-50 10,-50 10,-60 20,-60" /> -->
<polygon class="wall" points="-10,10 10,10 10,20 -10,20" />
<polygon class="wall" points="-10,10 10,10 10,40 -10,40" />
<!-- <polygon class="wall" points="-20,-50 -10,-50 -10,-60 -20,-60" /> -->
<!-- <polygon class="wall" points="20,50 10,50 10,60 20,60" /> -->
@@ -493,34 +493,18 @@ const Move = (() => {
console.log("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
let posP;
const contact = contacts[0];
if (contact.corner) {
posP = cornerContactPosition(p.x, p.y, px, py, contact.corner, s.radius);
Velocity[entity_id] = { x: 0, y: 0 };
Position[entity_id] = cornerContactPosition(p.x, p.y, px, py, contact.corner, s.radius);
} else if (contact.edge) {
// if (isLandable(contact.edge) && s.gearDown) s.isLanded = true;
// console.log("contact", contact);
// posP = edgeContactPosition(p.x, p.y, px, py, contact.edge, s.radius);
// console.log("position calculated by edgeContactPosition", posP);
posP = contact.position;
// console.log("edge contact position current", posP);
// const velBeforeColl = { vx: Velocity[entity_id].x, vy: Velocity[entity_id].y };
// console.log("velocity before collision", velBeforeColl);
const { xa, ya, xb, yb } = contact.edge;
const positionSeg = { x1: px, y1: py, x2: p.x, y2: p.y };
const edgeSeg = { x1: xa, y1: ya, x2: xb, y2: yb };
console.log("CURRENT POSITION", px, py);
console.log("INTENDED POSITION", p.x, p.y);
console.log("CONTACT POSITION", contact.position);
// if (px === posP.x && py === posP.y) {
// const m1 = slope({ xa: px, ya: py, xb: p.x, yb: p.y });
if (contact.edge.ya === contact.edge.yb && contact.edge.xa < contact.edge.xb) {
console.log("ON A FLAT EDGE");
// Velocity[entity_id] = { x: velX, y: velY };
if (contact.edge.ya === contact.edge.yb) {
if (contact.edge.xa < contact.edge.xb) {
if (v.y <= 0) {
Velocity[entity_id] = { x: v.x, y: v.y };
Position[entity_id] = { x: p.x, y: p.y };
@@ -528,54 +512,17 @@ const Move = (() => {
Velocity[entity_id] = { x: v.x, y: 0 };
Position[entity_id] = { x: p.x, y: contact.position.y };
}
// Velocity[entity_id].x = v.x;
// Position[entity_id] = { x: p.x, y: p.y };
} else if (contact.edge.xa > contact.edge.xb) {
if (v.y <= 0) {
Velocity[entity_id] = { x: v.x, y: 0 };
Position[entity_id] = { x: p.x, y: contact.position.y };
} else if (v.y > 0) {
Velocity[entity_id] = { x: v.x, y: v.y };
Position[entity_id] = { x: p.x, y: p.y };
}
}
// const m1 = slope({ xa: vx, ya: vy, xb: v.x, yb: v.y });
// const m2 = slope(contact.edge);
// const m2 = 1/-slope(contact.edge); //normal??
// we need the angle between the velocity and normal vector, no?
// const theta = Math.atan((m1-m2) / (1+m2*m2));
// const velX = v.x * Math.sin(theta);
// const velY = v.y * Math.cos(theta);
// console.log("vvvvvvvvvvvvvvvvvvvv", v);
// console.log("theta", theta);
// console.log("theta", theta, "velX", velX.toFixed(15), "velY", velY.toFixed(15));
// i need the normal force to push back
// Velocity[entity_id] = { x: velX, y: velY };
// Position[entity_id] = { x: p.x, y: p.y };
// } else {
// Velocity[entity_id] = { x: 0, y: 0 };
// Position[entity_id] = { x: posP.x, y: posP.y };
// }
// console.log("POSITIONSEG", positionSeg);
// console.log("EDGESEG", edgeSeg);
}
}
// we need to map velocity in segments
// Velocity[entity_id] = { x: 0, y: 0 };
// Position[entity_id] = { x: posP.x, y: posP.y };
// s.node.style.transform = `translate(${Position[entity_id].x}px, ${Position[entity_id].y}px)`;
// } else if (current && s.collision) {
// console.log("2222222222222222222222222222222");
// if (s.isLanded && s.velocity.y < 0) {
// s.gearDown = false;
// s.isLanded = false;
// s.position = { x: p.x, y: p.y };
// s.node.style.transform = `translate(${s.position.x}px, ${s.position.y}px)`;
// s.collision = null;
// } else {
// s.velocity = { x: 0, y: 0 };
// }
} else {
Velocity[entity_id] = { x: v.x, y: v.y };
Position[entity_id] = { x: p.x, y: p.y };
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