WIP: figure out normal vector but i don't th ink i need to

html/images/space.svg

@@ -551,11 +551,34 @@ const Move = (() => {
               // const theta = Math.atan(Math.abs((m1-m2)/(1+m1*m2)));
               const thetaY = Math.atan((contact.edge.yb - contact.edge.ya)/(contact.edge.xb-contact.edge.xa));
               const thetaX = Math.atan((contact.edge.xb-contact.edge.xa)/(contact.edge.yb - contact.edge.ya));
+              // const thetaX = Math.atan((contact.edge.xb-contact.edge.xa)/(contact.edge.yb - contact.edge.ya));
+              const edgeSlope = slope(contact.edge);
+              const rise = contact.edge.yb-contact.edge.ya;
+              const run = contact.edge.xb-contact.edge.xa;
+              const edgeVector = { x: run, y: rise };
+              const normalVector = { x: rise, y: -run };
+              drawLine(p.x, p.y, p.x + normalVector.x, p.y + normalVector.y);
+              drawLine(p.x, p.x, p.x + v.x, p.y + v.y, "blue");
+              console.log("edgeVector", edgeVector, "normalVector", normalVector);
+              const edgeVectorMagnitude = Math.sqrt(edgeVector.x**2+edgeVector.y**2);
+              const velocityVectorMagnitude = Math.sqrt(v.y**2+v.x**2);
+              const dotProduct = edgeVector.y*v.y + edgeVector.x*v.x;
+              const normalVectorDotProduct = normalVector.y*v.y + normalVector.x*v.x;
+              console.log("dotProduct", dotProduct, "normalVectorDotProduct", normalVectorDotProduct);
+              const edgeTheta = Math.acos(dotProduct / (edgeVectorMagnitude * velocityVectorMagnitude));
+              const normalTheta = Math.acos(normalVectorDotProduct / (edgeVectorMagnitude * velocityVectorMagnitude));
+
               console.log("VELOCITY", v);
+              console.log("theta between edge vector and velocity vector", edgeTheta, "degrees", edgeTheta * 180 / Math.PI);
+              console.log("theta between normal vector and velocity vector", normalTheta, "degrees", normalTheta * 180 / Math.PI);
+
 
               Velocity[entity_id] = {
-                x: v.x * Math.sin(thetaX) + v.y * Math.cos(thetaY),
+                // x: v.x * Math.sin(thetaX) + v.y * Math.cos(thetaY),
-                y: v.y * Math.sin(thetaY) + v.x * Math.cos(thetaX)
+                // y: v.y * Math.sin(thetaY) + v.x * Math.cos(thetaX)
+                x: v.y,
+                // y: v.y * Math.sin(thetaY) + v.x * Math.cos(thetaX)
+                y: 0
               };
 
               console.log("VELOCITY AFTER", Velocity[entity_id]);