opelly/Java-N-Body-Simulation
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opelly27
2021-09-07 13:04:48 -07:00
parent 51439f6946
commit 14d14aef51
5 changed files with 297 additions and 40 deletions
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Space.java
+95 -20
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@@ -1,17 +1,21 @@
import java.awt.image.*;
public class Space {
Body[] bodies;
double height;
double width;
Body[] bodies; // List of body objects that make up the simulation
double height; // The height of the spacial region being simulated
double width; // The width of the spacial region being simulated
double timeslice; // The time in sections between each tick of the simulation
public Space(Body[] bodies, double height, double width){
public Space(Body[] bodies, int height, int width, double timeslice){
this.bodies = bodies;
this.height = height;
this.width = width;
this.timeslice = timeslice;
}
public void calculateForces(){
public void updateForces(){
//double runningTotal = 0;
for(int i = 0; i < this.bodies.length; i ++){
@@ -19,32 +23,103 @@ public class Space {
}
}
public void updateVelocities(){
for(int i = 0; i < this.bodies.length; i ++){
this.bodies[i].updateVelocity(this.timeslice);
}
}
public void updatePositions(){
for(int i = 0; i < this.bodies.length; i ++){
this.bodies[i].updatePosition(this.timeslice);
}
}
public void draw(){
Canvas canvas = new Canvas( (int) this.height, (int) this.width, 255,255,255,255);
for(int i = 0; i < this.bodies.length; i ++){
// switch(i){
// case 0: canvas.drawSquare(5, (int) this.bodies[i].getXpos(), (int) this.bodies[i].getYpos(), 0, 0, 0, 255);
// case 1: canvas.drawSquare(5, (int) this.bodies[i].getXpos(), (int) this.bodies[i].getYpos(), 255, 0, 0, 255);
// case 2: canvas.drawSquare(5, (int) this.bodies[i].getXpos(), (int) this.bodies[i].getYpos(), 0, 0, 255, 255);
// case 3: canvas.drawSquare(5, (int) this.bodies[i].getXpos(), (int) this.bodies[i].getYpos(), 0, 255, 0, 255);
// }
canvas.drawSquare(5, (int) this.bodies[i].getXpos(), (int) this.bodies[i].getYpos(), 0, 0, 0, 255);
}
canvas.display();
}
public static void main(String args[]){
Body testBody = new Body(15000, 0, 0, 10, 10);
Body testBody2 = new Body(27000, 2, 1, 10, 10);
Body testBody3 = new Body(29530, 4, 2, 10, 10);
Body testBody4 = new Body(29530000, -4, 4, 10, 10);
Body[] bodies = new Body[4];
Body testBody = new Body(2000000, 375, 375, 0, 0);
Body testBody2 = new Body(2, 500, 400, 0, -.5);
Body testBody3 = new Body(2, 200, 400, 0, .5);
Body testBody4 = new Body(2, 200, 500, .5, 0);
Body testBody5 = new Body(2, 200, 200, -.5, 0);
Body[] bodies = new Body[5];
bodies[0] = testBody;
bodies[1] = testBody2;
bodies[2] = testBody3;
bodies[3] = testBody4;
bodies[4] = testBody5;
Space space = new Space(bodies, 500, 500);
space.calculateForces();
Space space = new Space(bodies, 750, 750, .02);
System.out.println(space.bodies[0].getNetXforce());
System.out.println(space.bodies[0].getNetYforce());
while(true){
space.updateForces();
space.updateVelocities();
space.updatePositions();
//System.out.println(space);
space.draw();
}
}
System.out.println(space.bodies[1].getNetXforce());
System.out.println(space.bodies[1].getNetYforce());
@Override
public String toString() {
String returnString = String.format("Width: " + this.width + " Height: " + this.height + "\n\n\n");
for(int i = 0; i < this.bodies.length; i ++){
int b = i +1;
returnString += String.format("Body #" + b + "\n\n");
returnString += String.format("Position: X = " + this.bodies[i].getXpos() + " ");
returnString += String.format("Position: Y = " + this.bodies[i].getYpos() + "\n");
returnString += String.format("Velosity: X = " + this.bodies[i].getXvelo() + " ");
returnString += String.format("Velosity: Y = " + this.bodies[i].getYvelo() + "\n\n");
System.out.println(space.bodies[2].getNetXforce());
System.out.println(space.bodies[2].getNetYforce());
}
System.out.println(space.bodies[3].getNetXforce());
System.out.println(space.bodies[3].getNetYforce());
return returnString;
}
}
// public BufferedImage generateImage(){
// BufferedImage img = new BufferedImage((int)this.height, (int)this.width, BufferedImage.TYPE_INT_ARGB);
// for(int y = 0; y < this.height; y ++){
// for (int x = 0; x < this.width; x ++){
// for (int body = 0; body < this.bodies.length; body ++){
// if((int)this.bodies[body].getXpos() == x){
// if((int) this.bodies[body].getYpos() == y){
// int a = 255;
// int r = 0;
// int g = 0;
// int b = 0;
// int p = (a<<24) | (r<<16) | (g<<8) | b;
// img.setRGB(x, y, p);
// }
// }
// }
// }
// }
// return img;
// }