10/19/2019 proj0

Author: glados17

lab/lab2/.idea/workspace.xml

@@ -0,0 +1,32 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "type": "java",
+            "name": "CodeLens (Launch) - NBody",
+            "request": "launch",
+            "mainClass": "NBody"
+        },
+        {
+            "type": "java",
+            "name": "CodeLens (Launch) - BasicInDemo",
+            "request": "launch",
+            "mainClass": "BasicInDemo"
+        },
+        {
+            "type": "java",
+            "name": "Debug (Launch) - Current File",
+            "request": "launch",
+            "mainClass": "${file}"
+        },
+        {
+            "type": "java",
+            "name": "Debug (Launch)-LeapYear",
+            "request": "launch",
+            "mainClass": "LeapYear"
+        }
+    ]
+}

proj/proj0/.idea/$PRODUCT_WORKSPACE_FILE$

@@ -0,0 +1,85 @@
+
+public class NBody {
+   
+    public static double readRadius(String  file) {
+        In in = new In(file);
+        in.readDouble();
+        double universe_r = in.readDouble();
+        return universe_r;
+    }
+    
+    public static Planet[] readPlanets(String file) {
+        In in = new In(file);
+        int count_planets = in.readInt();
+        in.readDouble();
+        Planet[] planets_array = new Planet[count_planets];
+        for (int i =0; i < count_planets; i++) {
+            double xxPos = in.readDouble();
+            double yyPos = in.readDouble();
+            double xxVel = in.readDouble();
+            double yyVel = in.readDouble();
+            double mass = in.readDouble();
+            String imgFileName = in.readString();
+            planets_array[i] = new Planet(xxPos, yyPos, xxVel, yyVel, mass, imgFileName);
+        }
+        return planets_array;
+    }
+    public static void main(String[] args) {
+
+        // Collecting All Needed Input
+        double T = Double.valueOf(args[0].toString());
+        double dt = Double.valueOf(args[1].toString());
+        String filename = args[2];
+        double universe_r = readRadius(filename);
+        String universe_pic = "./images/starfield.jpg";
+
+        // Drawing the Background
+        StdDraw.setScale(-1 * universe_r, universe_r);
+        StdDraw.picture(0, 0, universe_pic, 2 * universe_r, 2 * universe_r);
+        Planet[] planets = readPlanets(filename);
+        for (Planet planet : planets) {
+            planet.draw();
+        }
+
+
+        StdDraw.enableDoubleBuffering();
+
+        // For each time through the loop, do the following:
+        for (double running_time = 0; running_time < T; running_time += dt) {
+
+            // Calculate the net x and y forces for each planet, storing these in the xForces and yForces arrays respectively.
+            double[] xForces = new double[planets.length];
+            double[] yForces = new double[planets.length];
+            // Create an xForces array and yForces array.
+            for (int i = 0; i <planets.length; i++) {
+                xForces[i] = planets[i].calcNetForceExertedByX(planets);
+                yForces[i] = planets[i].calcNetForceExertedByY(planets);
+            }
+
+            // Call update on each of the planets. This will update each planet’s position, velocity, and acceleration.
+            for (int i = 0; i <planets.length; i++) {
+                planets[i].update(dt, xForces[i], yForces[i]);
+            }
+            // Draw the background image.
+            StdDraw.picture(0, 0, universe_pic, 2 * universe_r, 2 * universe_r);
+            // Draw all of the planets.
+            for (Planet planet : planets) {
+                planet.draw();
+            }
+            // Show the offscreen buffer.
+            StdDraw.show();
+            // Pause the animation for 10 milliseconds
+            StdDraw.pause(10);
+        }
+        //  print out the final state of the universe in the same format as the input
+        StdOut.printf("%d\n", planets.length);
+        StdOut.printf("%.2e\n", universe_r);
+        for (int i = 0; i < planets.length; i++) {
+            StdOut.printf("%11.4e %11.4e %11.4e %11.4e %11.4e %12s\n",
+            planets[i].xxPos, planets[i].yyPos, planets[i].xxVel,
+            planets[i].yyVel, planets[i].mass, planets[i].imgFileName);   
+}
+        
+    }
+
+}