Refactor

html/images/space.svg

@@ -699,26 +699,13 @@
     }
 
     function cornerContactPosition(xc, yc, x, y, corner, cLength) {
-      const diffx = xc - x;
-      const diffy = yc - y;
-      // console.log("xc", xc, "yc", yc, "x", x, "y", y);
       const positionSeg = { xa: xc, ya: yc, xb: x, yb: y };
       const posNormIntxn = perpIntxn(slope(positionSeg), x, y, corner.x, corner.y);
 
-      const posSegLength = Math.sqrt(diffy ** 2 + diffx ** 2);
-      const detp = xc * y - yc * x;
-      // console.log("detp", detp, "posSegLength", posSegLength);
-
-      // the length of the "corner segment"
+      // shortest distance between corner and path
       const aLength = distance(corner.x, corner.y, posNormIntxn.x, posNormIntxn.y);
-      // where did I get this calculation? it also works but how??
-      // const aLengthAlso = Math.abs(diffy * corner.x - diffx * corner.y + detp) / posSegLength;
-
-      // console.log("aLength", aLength, "aLengthAlso", aLengthAlso);
-
-      // drawLine(posNormIntxn.x, posNormIntxn.y, corner.x, corner.y, "red");
+      // distance from position/normal intersection
       const bLength = Math.sqrt(Math.abs(cLength ** 2 - aLength ** 2));
-      // console.log("bLength", bLength);
 
       const intxnSeg = document.createElementNS(namespaceURIsvg, 'line');
       intxnSeg.setAttribute('x1', posNormIntxn.x);
@@ -897,10 +884,10 @@
       started = false;
       const mult = 10000;
 
-      s.position = { x: 2, y: 7 };
-      // s.velocity = { x: 4.5, y: 5 };
+      s.position = { x: 0, y: 0 };
+      s.velocity = { x: 0, y: 0 };
 
-      s. velocity = { x: 2*mult, y: 7*mult };
+      // s. velocity = { x: 2*mult, y: 7*mult };
 
       s.acceleration = { x: 0, y: 0 };
       s.rotate = 0;