Initial commit

xPlanet.pde

@@ -0,0 +1,59 @@
+/*
+
+Planet class
+
+*/
+
+class Planet {
+  Vector pos;
+  Vector vel;
+  Vector ren = new Vector(0,0);
+  float mass;
+  color col = 100;
+  float dia;
+  String name;
+  
+  Planet(float x, float y, float mass){
+    pos = new Vector(x,y);
+    vel = new Vector(0,0);
+    this.mass = mass;
+    this.dia = constrain( sqrt(mass) * 5 ,1,100);
+  }
+  
+  /* SETTERS */
+  void setPos(Vector _pos) {this.pos = _pos;}
+  void setPos(float x, float y) {this.pos = new Vector(x,y);}
+  
+  void setVel(Vector _vel) {this.pos = _vel;}
+  void setVel(float x, float y) {this.vel = new Vector(x,y);}
+  
+  void setname(String _name){this.name = _name;}
+  
+  /* FUNCTIONS */
+  void gravity(Planet p){
+    float xDist = (p.pos.x - this.pos.x);
+    float yDist = (p.pos.y - this.pos.y);
+    float magsq = sq(xDist) + sq(yDist);
+    
+    float pMass = (this.mass * p.mass);
+    
+    float xGrav = xDist * g * (pMass/magsq);
+    float yGrav = yDist * g * (pMass/magsq);
+
+    this.vel.add(xGrav/this.mass,yGrav/this.mass);
+  }
+  void updatePos(){
+    this.pos.add(this.vel);
+  }
+  void display(){
+    fill(this.col);
+    ren.set(pos.x - offset.x,pos.y - offset.y);
+    circle(ren.x,ren.y,dia);
+    if(flags.nameTags){
+      fill(0);
+      textAlign(CENTER,BOTTOM);
+      textSize(20 * 1/scaleMul);
+      text(name,ren.x,ren.y - dia/2);
+    }
+  }
+}