From de0052aa0a9035fa7535ece9139582cfbb18bf93 Mon Sep 17 00:00:00 2001
From: Catalin Constantin Mititiuc <webdevcat@proton.me>
Date: Mon, 26 Jan 2026 14:51:25 -0800
Subject: [PATCH] Think I got it

---
 html/images/space.svg | 39 +++++++++++++++++----------------------
 1 file changed, 17 insertions(+), 22 deletions(-)

diff --git a/html/images/space.svg b/html/images/space.svg
index c6fc061..5a053be 100644
--- a/html/images/space.svg
+++ b/html/images/space.svg
@@ -591,50 +591,45 @@ const Move = (() => {
           const rise = contact.edge.yb-contact.edge.ya;
           const run = contact.edge.xb-contact.edge.xa;
 
-          // drawLine(p.x - v.x, p.y - v.y, p.x, p.y, "blue"); // velocity vector
           const det = v.x * rise - v.y * run;
 
-          // drawLine(contact.edge.xa, contact.edge.ya, contact.edge.xb, contact.edge.yb, "green"); // edge vector
-
-          // contact.velocity = { x: prAvx - prBvx, y: prAvy - prBvy };
           contact.velocity = bounceVector(v, run, rise);
 
           // edge normal vector
-          // drawLine(p.x, p.y, p.x + contact.velocity.vec2.rightNormal.x , p.y + contact.velocity.vec2.rightNormal.y, "black");
+          drawLine(p.x, p.y, p.x + contact.velocity.vec2.rightNormal.x , p.y + contact.velocity.vec2.rightNormal.y, "black");
           // bounced velocity vector
           // drawLine(p.x, p.y, p.x + contact.velocity.x, p.y + contact.velocity.y, "blue");
 
-          // const edgeNrmlVect = { x: rise, y: -run };
           const edgeNrmlVect = vector(rise, -run);
-          const velocityVect = vector(-vx, vy);
+          const velocityVect = vector(v.x, v.y);
           console.log("velocity vector", velocityVect);
           console.log("normal vector", edgeNrmlVect);
           drawLine(px, py, px + velocityVect.x, py + velocityVect.y, "blue");
-          drawLine(px, py, px + edgeNrmlVect.x, py + edgeNrmlVect.y);
-          // vDotn = edgeNrmlVect.x * velocityVect.dx + edgeNrmlVect.y * velocityVect.dy;
           const vn = edgeNrmlVect.x * velocityVect.dx + edgeNrmlVect.y * velocityVect.dy;
           const vDotn = edgeNrmlVect.x * velocityVect.x + edgeNrmlVect.y * velocityVect.y;
-          const f = vDotn / (edgeNrmlVect.x ** 2 + edgeNrmlVect.y ** 2);
+          console.log("V dot N", vDotn);
+          const denom = edgeNrmlVect.x ** 2 + edgeNrmlVect.y ** 2;
+          console.log("denom", denom);
 
           const vOnNx = vn * velocityVect.dx + velocityVect.x;
           const vOnNy = vn * velocityVect.dy + velocityVect.y;
-          const prVonNx = edgeNrmlVect.y * f;
-          const prVonNy = -edgeNrmlVect.x * f;
+          const pVect = {
+            x: vDotn / denom * edgeNrmlVect.x,
+            y: vDotn / denom * edgeNrmlVect.y
+          };
+          const reverseP = { x: -pVect.x, y: -pVect.y };
+
+          // add reverseP and v vectors together
+          const prVonNx = reverseP.x + v.x;
+          const prVonNy = reverseP.y + v.y;
 
-          console.log("vOnNx, vOnNy", vOnNx, vOnNy)
           console.log("prVonNx, prVonNy", prVonNx, prVonNy)
-          // drawLine(contact.position.x, contact.position.y, contact.position.x + prVonNy, contact.position.y - prVonNx, "teal");
           drawLine(contact.position.x, contact.position.y, contact.position.x + prVonNx, contact.position.y + prVonNy, "teal");
 
-          // contact.velocity = { x: -prVonNx, y: prVonNy }
-          // contact.velocity = { x: 16, y: 32 };
           contact.velocity = { x: prVonNx, y: prVonNy };
 
-          // Velocity[entity_id] = { x: -prVonNx, y: prVonNy };
           Velocity[entity_id] = { x: prVonNx, y: prVonNy };
 
-          // -15.999999999999998 31.999999999999996
-
           // if (det < 0) {
           //   console.log("moving towards edge");
           //   console.log("current velocity", vx, vy);
@@ -750,10 +745,10 @@ function init() {
   started = false;
   const mult = 10;
 
-  s.position = { x: 2.23, y: -10 };
-  // s.velocity = { x: 0, y: -10 };
+  s.position = { x: 0, y: -10 };
+  s.velocity = { x: -10, y: 20 };
   // s.velocity = { x: 10, y: 20 };
-  s.velocity = { x: 0, y: 40 };
+  // s.velocity = { x: -20, y: 40 };
   // s.velocity = { x: 0, y: 20000 };
   s.angularVelocity = 0;