Made new entities created use the old locations

javascript/newsim.js

@@ -24,8 +24,28 @@ function getMass(type){
     }
 }
 
-function createEntity(x, y, vx, vy, ax, ay, rot, rotv, type){
+function createEntity(x, y, vx, vy, ax, ay, rot, rotv, type, id=0, iframes=Math.floor(Math.random()*100)){ 
-    let entity = {
+    if (Settings.emptyEntries.length > 1){
+        var entryID = Settings.emptyEntries.pop();
+        if (Settings.devMode) console.warn("Creating new enity from old", entryID);
+        if (entryID <= simulator.length && entryID >= 0){
+            entity = simulator[entryID];
+            entity.x = x;
+            entity.y = y;
+            entity.vx = vx;
+            entity.vy = vy;
+            entity.ax = ax;
+            entity.ay = ay;
+            entity.rot = rot;
+            entity.rotv = rotv;
+            entity.iframes = 1000;
+            entity.show = true;
+            entity.type = type
+        }else{
+            if (Settings.devMode) console.error("Entry ID out of bounds", Settings.emptyEntries.length, id, entryID);
+        }
+    }else{
+        simulator.push({
         x: x,
         y: y,
         ax: ax,
@@ -38,8 +58,11 @@ function createEntity(x, y, vx, vy, ax, ay, rot, rotv, type){
         forcex: 0.0,
         forcey: 0.0,
         type: type,
+            show: true,
+            ueid: id,
+            iframes: iframes
+        });
     }
-    simulator.push(entity);
 }
 
 
@@ -56,29 +79,47 @@ function getRandomType(){
 }
 
 function physicsUpdate(entity){
+    if (entity.show){
     entity.vx += entity.ax;
     entity.vy += entity.ay;
     entity.x += entity.vx;
     entity.y += entity.vy;
     entity.rot += entity.rotv;
-
+        if (entity.iframes > 0) entity.iframes -= 1;
+        if (entity.iframes == 0) simulator.forEach((other_entity) =>{
+            checkCollision(entity, other_entity);
+        });
+    }
 }
 
-function onHit(entity1, entity2){
+function checkCollision(entity1, entity2){
-    if(entity1.type == entityTypes.METERORITE_LARGE){
+    if (entity1.type == entityTypes.COMET && entity2.type == entityTypes.COMET){
-        createEntity(entity1.x, entity1.y, entity2.vx-entity1.vx, entity2.vy-entity1.vy, 0.0,0.0,entity2.rot-entity1.rot, entity2.rotv-entity1.rotv, entityTypes.METERORITE_SMALL);
-    }if(entity1.type == entityTypes.COMET){
         
-    }else{
+    }else if (entity1.ueid != entity2.ueid 
+        && entity1.show 
+        && entity2.show){
+        var dist = distance(entity1, entity2);
+        if(dist < 15){
+            if (Settings.devMode) {
+                stroke('magenta');
+                strokeWeight(5);  
+                line(entity1.x,entity1.y, entity2.x, entity2.y);
+                console.log("Collision at", entity1.x, entity1.y, entity1.iframes, entity2.x, entity2.y, dist);
+            }
         Explode(entity1);
+            Explode(entity2);
+        }
+    }
     }
 
-    if(entity2.type == entityTypes.METERORITE_LARGE){
+function Explode(entity){
-        createEntity(entity2.x, entity2.y, entity1.vx-entity2.vx, entity1.vy-entity2.vy, 0.0,0.0,entity2.rot-entity1.rot, entity2.rotv-entity1.rotv, entityTypes.METERORITE_SMALL);
+    if(entity.type == entityTypes.METERORITE_SMALL){
-    }if(entity1.type == entityTypes.COMET){
+        entity.show = false;
-        
+        Settings.emptyEntries.push(entity.ueid);
-    }else{
+    }if(entity.type == entityTypes.METERORITE_LARGE){
-        Explode(entity2);
+        entity.type = entityTypes.METERORITE_SMALL
+        entity.iframes = 1000;
+        createEntity(entity.x, entity.y, entity.vx + Math.random(), entity.vy + Math.random(), 0.0,0.0,0.0,0.0, entityTypes.METERORITE_SMALL, id=entity.ueid, iframes=1000);
     }
 
 }
@@ -127,9 +168,8 @@ function setup(){
     canvas.position(0,0);
     worldScale = createSlider();
     //Load Entities
-    let entityCount = 50;
+    
-    let rotationSpeed = 100.0;
+    for(var i = 0; i <= entityCount; i+=1){
-    for(let i = 0; i <= entityCount; i+=1){
         createEntity(
             Math.floor(Math.random() * windowWidth), //X Location
             Math.floor(Math.random() * windowHeight), //Y Location 
@@ -140,6 +180,7 @@ function setup(){
             0.0, //Current Rotation
             (Math.random() * 2 *(Math.PI / rotationSpeed))-(Math.PI / rotationSpeed), //Rotation Velocity
             getRandomType(),
+            id=i
         );
     }
 }