WIP: slide along edge but still fall through sometimes

html/images/space.svg

@@ -584,24 +584,31 @@ const Move = (() => {
           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;
+          const accVect = vector(ax, ay);
           const rise = contact.edge.yb-contact.edge.ya;
           const run = contact.edge.xb-contact.edge.xa;
           const edgeNrmlVect = vector(rise, -run);
           const velocityVect = vector(v.x, v.y);
 
-
-          const vn = edgeNrmlVect.x * velocityVect.dx + edgeNrmlVect.y * velocityVect.dy;
           const vDotn = edgeNrmlVect.x * velocityVect.x + edgeNrmlVect.y * velocityVect.y;
+          const aDotn = edgeNrmlVect.x * accVect.x + edgeNrmlVect.y * accVect.y;
           const denom = edgeNrmlVect.x ** 2 + edgeNrmlVect.y ** 2;
           const pVect = {
             x: vDotn / denom * edgeNrmlVect.x,
             y: vDotn / denom * edgeNrmlVect.y
           };
+
+          const aVect = {
+            x: aDotn / denom * edgeNrmlVect.x,
+            y: aDotn / denom * edgeNrmlVect.y
+          };
+
           const reverseP = { x: -pVect.x, y: -pVect.y };
+          const reverseA = { x: -aVect.x, y: -aVect.y };
 
           // add reverseP and v vectors together
-          const prVonNx = reverseP.x + v.x;
-          const prVonNy = reverseP.y + v.y;
+          const prVonNx = reverseP.x + v.x + reverseA.x;
+          const prVonNy = reverseP.y + v.y + reverseA.y;
           // console.log("velocity vector", velocityVect);
           // console.log("normal vector", edgeNrmlVect);
           // console.log("V dot N", vDotn);
@@ -612,10 +619,25 @@ const Move = (() => {
 
           // contact.velocity = { x: prVonNx, y: prVonNy };
           Velocity[entity_id] = { x: prVonNx, y: prVonNy };
+          console.log("contact.position", contact.position);
+          // drawCircle(contact.position.x, contact.position.y);
+          console.log("current position", px, py);
+          console.log("future position", p);
+
+          // const newV = {
+          //   x: vx > 0 && vx + ax <= 0 ? 0 : vx + ax,
+          //   y: vy > 0 && vy + ay <= 0 ? 0 : vy + ay
+          // };
+
+          const newP = {
+            x: contact.position.x + elapsed * prVonNx * metersPerMillisecond,
+            y: contact.position.y + elapsed * prVonNy * metersPerMillisecond
+          };
+          console.log("newP", newP);
+
+          Position[entity_id] = newP;
         }
       } else {
-        console.log("movi");
-
         Velocity[entity_id] = { x: v.x, y: v.y };
         Position[entity_id] = { x: p.x, y: p.y };
       }
@@ -705,10 +727,10 @@ function init() {
   const mult = 10;
 
   s.position = { x: 0, y: -10 };
-  s.velocity = { x: -10, y: 20 };
+  // s.velocity = { x: -10, y: 20 };
   // s.velocity = { x: 10, y: 20 };
   // s.velocity = { x: -20, y: 40 };
-  // s.velocity = { x: 0, y: 20000 };
+  s.velocity = { x: 0, y: 10 };
   s.angularVelocity = 0;
 
   // s. velocity = { x: -5*mult, y: 7*mult };