Added start to the background physics sim

javascript/newsim.js

@@ -0,0 +1,151 @@
+let images = {};
+let simulator = [];
+let maxSpeed = 1;
+let backgroundImage;
+
+let LEFT = [-1,0];
+
+const entityTypes = {
+    METERORITE_SMALL: "meteorite_small",
+    METERORITE_LARGE: "meteorite_large",
+    COMET: "comet",
+};
+
+let Settings = {
+    windowWrap: true,
+    physics: true,
+}
+
+function getMass(type){
+    switch (type){
+        case entityTypes.COMET: return 1400.0;
+        case entityTypes.METERORITE_SMALL: return 500.0;
+        case entityTypes.METERORITE_LARGE: return 1000.0;
+    }
+}
+
+function createEntity(x, y, vx, vy, type){
+    let entity = {
+        x: x,
+        y: y,
+        ax: 0.0,
+        ay: 0.0,
+        vx: vx,
+        vy: vy,
+        rot: 0,
+        mass: getMass(type),
+        type: type,
+    }
+    simulator.push(entity);
+}
+
+
+function getRandomType(){
+    let rand = Math.random();
+    if (rand > 0.955){
+        console.log("Comet made");
+        return entityTypes.COMET;
+    }if(rand > 0.4){
+        return entityTypes.METERORITE_SMALL;
+    }else{
+        return entityTypes.METERORITE_LARGE;
+    }
+}
+
+function physicsUpdate(entity){
+    entity.vx += entity.ax;
+    entity.vy += entity.ay;
+    entity.x += entity.vx;
+    entity.y += entity.vy;
+}
+
+function onHit(entity){
+
+}
+
+function drawBackground(refImage){
+    let w = windowWidth / refImage.width;
+    let h = windowHeight / refImage.height;
+    for (let iy = 0; iy <= h; iy++){
+        for (let ix = 0; ix <= w; ix++){
+            image(refImage, refImage.width * ix, refImage.height * iy);
+        }
+    }
+}
+
+function drawEntity(entity){
+    push();
+    imageMode(CENTER);
+    translate(entity.x, entity.y, 0);
+    rotate((Math.atan2(entity.vx, entity.vy) - Math.atan2(-1,0)) * 180/Math.PI);
+    image(images[entity.type], 0,0);
+    pop();
+}
+
+function preload(){
+    images[entityTypes.METERORITE_SMALL] = loadImage("/media/Art/meteorite_small_1.png");
+    images[entityTypes.METERORITE_LARGE] = loadImage("/media/Art/Meteorite_Large_1_100.png");
+    images[entityTypes.COMET] = loadImage("/media/Art/comet.png");
+    //images["ship"] = loadImage("/media/Art/ship.png"); #Make Ship asset for game portion
+    images["background"] = loadImage("/media/Art/EmptySpace.png");
+}
+
+function setup(){
+    let canvas = createCanvas(windowWidth, windowHeight);
+    background(255);
+    describe("A space physics simulator");
+    
+    canvas.position(0,0);
+    
+    //Load Entities
+    let entityCount = 50;
+    for(let i = 0; i <= entityCount; i+=1){
+        createEntity(
+            Math.floor(Math.random() * windowWidth), 
+            Math.floor(Math.random() * windowHeight),
+            (Math.random() * maxSpeed * 2)-maxSpeed,
+            (Math.random() * maxSpeed * 2)-maxSpeed,
+            getRandomType(),
+        );
+    }
+}
+
+function mouseClicked(){
+    console.log(mouseX, mouseY);
+    simulator.forEach((entity) =>{
+        
+    })
+}
+
+function draw(){
+    //background(images["background"]);
+    //Draw Tiled Background
+    drawBackground(images["background"]);
+
+    for(let e = 1; e < simulator.length; e++){
+        let entity = simulator[e]
+        
+        //Physics Update
+        if (Settings.physics){
+            physicsUpdate(entity)
+        }
+
+        //Window Wrap
+        if (Settings.windowWrap){
+            if (entity.x > windowWidth){
+                entity.x = 0;
+            }
+            if (entity.x < 0){
+                entity.x = windowWidth;
+            }
+            if (entity.y > windowHeight){
+                entity.y = 0;
+            }
+            if (entity.y < 0){
+                entity.y = windowHeight;
+            }
+        }
+        //Draw Entity
+        drawEntity(entity);
+    }
+}