From df2eb64ed52788380a48a54d3632c3a11f61c1f9 Mon Sep 17 00:00:00 2001
From: Catalin Constantin Mititiuc <webdevcat@proton.me>
Date: Sun, 4 Jan 2026 23:15:48 -0800
Subject: [PATCH] WIP: edge collision position

---
 html/images/space.svg | 37 ++++++++++++++++++++++---------------
 1 file changed, 22 insertions(+), 15 deletions(-)

diff --git a/html/images/space.svg b/html/images/space.svg
index bf05f88..df33c92 100644
--- a/html/images/space.svg
+++ b/html/images/space.svg
@@ -204,15 +204,16 @@
     let acceleration; // meters per second per second
     let rotate = 0;
 
-    let mult = 1000;
+    let mult = 10000;
 
     const s = {
       position: { x: 0, y: 0 },
       // velocity: { x: 0, y: 0 },
 
-      // velocity: { x: 5, y: 10 },
-      velocity: { x: 5*mult, y: 10*mult },
-      acceleration: { x: 0, y: 0 },
+      velocity: { x: 5, y: 7 },
+      // velocity: { x: 5*mult, y: 8*mult },
+      acceleration: { x: 5, y: 7 },
+      // acceleration: { x: 0, y: 0 },
       rotate: 0,
       collision: null,
       isLanded: false,
@@ -495,7 +496,7 @@
       }
 
       const { a, b } = perppts;
-      if (a && b) drawLine(a.x, a.y, b.x, b.y);
+      // if (a && b) drawLine(a.x, a.y, b.x, b.y);
 
       return walls.reduce((acc, w) => {
         const filtered = a && b ? w.corners.filter(c => {
@@ -898,10 +899,10 @@
       const changeY = 0.001 * elapsed * velocityY;
 
       let { x, y } = s.position;
-      console.log("current position", x, y);
+      // console.log("current position", x, y);
       let position = [positionX, positionY] = [changeX + x, changeY + y];
       let [xc, yc] = position;
-      console.log("future position", xc, yc);
+      // console.log("future position", xc, yc);
 
       const collE = getCollisionEdges(edgeszz, position);
 
@@ -910,16 +911,16 @@
         const det = (xb - xa) * (y - ya) - (x - xa) * (yb - ya);
         return det < 0;
       });
-      console.log("edges facing ship", efs);
+      // console.log("edges facing ship", efs);
+
+      const positionSeg = { xa: x, ya: y, xb: xc, yb: yc };
+
+      // console.log("positionSeg", positionSeg);
 
       const edgeCollision = efs.find(({ edge, wall }) => {
         const { xa, ya, xb, yb } = edge;
         if (xc === x && yc === y) return;
 
-        const positionSeg = { xa: x, ya: y, xb: xc, yb: yc };
-        // const slopeps = slope(positionSeg);
-        // const posNormIntxn = perpIntxn(slopeps, x, y, c.corner.x, c.corner.y);
-
         const rise = yb - ya;
         const run = xb - xa;
         const length = distance(xa, ya, xb, yb);
@@ -939,10 +940,15 @@
         const roundedT = +t.toFixed(2);
         const roundedS = +s.toFixed(2);
 
-        console.log("positionSeg", positionSeg, "edgeSeg", edgeSeg);
+        console.log("positionSeg", positionSeg);
+        console.log("edgeSeg", edgeSeg);
         console.log("s", roundedS, "t", roundedT);
 
-        return roundedS <= 1 && roundedT >= 0;
+        // return roundedS >= 0 && roundedS <= 1 && roundedT >= 0 && roundedT <= 1;
+        return roundedS <= 1 && roundedT >= 0 && roundedT <= 1;
+        // return roundedS >= 0 && roundedS <= 1 && roundedT <= 1;
+        // return roundedS >= 0 && roundedS <= 1 && roundedT <= 1;
+        // return false;
       });
 
       efs.forEach(({ edge, wall }) => {
@@ -996,7 +1002,8 @@
       //   return +hc.toFixed(2) <= shipRadius;
       // });
 
-      s.collision = cornerColl || edgeCollision;
+      // s.collision = cornerColl || edgeCollision;
+      s.collision = edgeCollision || cornerColl;
 
       if (s.collision) console.log("COLLISION", s.collision);