/** Hello there fellow human, Welcome to my first C# program! I'm currently taking AP Physcis and I decided I wanted to make a simple physics simulation. I'm making this to test my knowledge of c# while also testing my knowledge of basic physics. If you have suggestions on how to improve my code then feel free to comment it. All suggestions are appreciated. -Pie */ using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace SoloLearn { class Program { static void Main(string[] args) { Entity e = new Entity(); e.Pos e.ApplyForce(new Force(9.8,0,90)); Console.WriteLine(e.Pos); } } struct Vector3D { private static double DEGREE = 180 / Math.PI; private static int SIGFIG = 10; private double x; public double X { get { return this.x; } set { this.x = value;this.UpdatePolar(); } } private double y; public double Y { get { return this.y; } set { this.y = value;this.UpdatePolar(); } } private double z; public double Z { get { return this.z; } set { this.z = value;this.UpdatePolar(); } } private double magnitude; public double Magnitude { get { return this.magnitude; } set { this.magnitude = value;this.UpdateGraphing(); } } private double yaw; public double Yaw { get { return this.yaw; } set { this.yaw = value%(2*Math.PI);this.UpdateGraphing(); } } private double pitch; public double Pitch { get { return this.pitch; } set { this.pitch = value%(2*Math.PI);this.UpdateGraphing(); } } public Vector3D(double x=0, double y=0, double z=0) { this.x = x; this.y = y; this.z = z; this.magnitude = Math.Sqrt( this.x * this.x + this.y * this.y + this.z * this.z); if(this.y!=0){ int dir = this.y<0 ? 3 : 1; this.yaw = this.x != 0 ? Math.Atan( this.x / (this.y) ) : Math.PI/2 * dir; }else{ this.yaw = this.x<0 ? Math.PI : 0; } this.pitch = (z>0 || z<0) ? Math.Atan( Math.Sqrt( this.x * this.x + this.y * this.y ) / (-1*this.z) ) : 0; if(this.z==0){ this.pitch += this.pitch==Math.PI ? Math.PI : 0; } if(this.x==0 & this.y==0){ this.pitch += this.z<0 ? Math.PI/2 : 0; } this.pitch += this.pitch<0 ? Math.PI*2 : 0; if((this.x<0 ^ this.y<0) & (this.x !=0 & this.y !=0)){ this.yaw += Math.PI; if(this.y<0 & this.x>0){ this.yaw += Math.PI; } } if(this.x<0 & this.y<0){ this.yaw += Math.PI; } this.magnitude = Math.Round(this.magnitude,SIGFIG); this.yaw = Math.Round(this.yaw * DEGREE, SIGFIG) * Math.PI/180; this.pitch = Math.Round(this.pitch * DEGREE, SIGFIG) * Math.PI/180; this.x = Math.Round(this.x,SIGFIG); this.y = Math.Round(this.y,SIGFIG); this.z = Math.Round(this.z,SIGFIG); } public static Vector3D FromPolar(double magnitude = 0, double yaw = 0, double pitch = 0){ Vector3D temp = new Vector3D(); temp.magnitude = magnitude; temp.yaw = yaw; temp.pitch = pitch; temp.UpdateGraphing(); return temp; } public void UpdateGraphing(){ this.x = this.magnitude * Math.Cos(Math.PI*2 - this.pitch) * Math.Cos(this.yaw); this.y = this.magnitude * Math.Cos(Math.PI*2 - this.pitch) * Math.Sin(this.yaw); this.z = this.magnitude * Math.Sin(Math.PI*2 - this.pitch); this.x = Math.Round(this.x,SIGFIG); this.y = Math.Round(this.y,SIGFIG); this.z = Math.Round(this.z,SIGFIG); } public void UpdatePolar(){ //this.Print(); this.magnitude = Math.Sqrt( this.x * this.x + this.y * this.y + this.z * this.z); if(this.y!=0){ int dir = this.y<0 ? 3 : 1; this.yaw = this.x != 0 ? Math.Atan( this.x / (this.y) ) : Math.PI/2 * dir; }else{ this.yaw = this.x<0 ? Math.PI : 0; } this.pitch = (z>0 || z<0) ? Math.Atan( Math.Sqrt( this.x * this.x + this.y * this.y ) / (-1*this.z) ) : 0; if(this.z==0){ this.pitch += this.pitch==Math.PI ? Math.PI : 0; } if(this.x==0 & this.y==0){ this.pitch += this.z<0 ? Math.PI/2 : Math.PI/2*3; } this.pitch += this.pitch<0 ? Math.PI*2 : 0; if((this.x<0 ^ this.y<0) & (this.x !=0 & this.y !=0)){ this.yaw += Math.PI; if(this.y<0 & this.x>0){ this.yaw += Math.PI; } } if(this.x<0 & this.y<0){ this.yaw += Math.PI; } this.magnitude = Math.Round(this.magnitude,SIGFIG); this.yaw = Math.Round(this.yaw * DEGREE, SIGFIG) * Math.PI/180; this.pitch = Math.Round(this.pitch * DEGREE, SIGFIG) * Math.PI/180; this.x = Math.Round(this.x,SIGFIG); this.y = Math.Round(this.y,SIGFIG); this.z = Math.Round(this.z,SIGFIG); //this.Print(); } public static Vector3D operator-(Vector3D a, Vector3D b){ return new Vector3D(a.X - b.X, a.Y - b.Y, a.Z - b.Z); } public static Vector3D operator+(Vector3D a, Vector3D b){ return new Vector3D(a.X + b.X, a.Y + b.Y, a.Z + b.Z); } public static Vector3D operator/(Vector3D a, double b){ return new Vector3D(a.X / b, a.Y / b, a.Z / b); } public static Vector3D operator*(Vector3D a, double b){ return new Vector3D(a.X * b, a.Y * b, a.Z * b); } public void Print(){ Console.WriteLine(string.Format("Rectangular: {0}\nPolar: {1}",this.ToString(),this.ToPolar())); } public override string ToString(){ return string.Format("({0},{1},{2})",this.x,this.y,this.z); } public string ToVector(){ return string.Format("({0},{1},{2})",this.x,this.y,this.z); } public string ToPolar(){ return string.Format("({0},{1},{2})",this.magnitude,this.yaw * DEGREE ,this.pitch * DEGREE); } } struct Force { public Vector3D vector; private double life; public double Life{ get { return life; } set { life = value; } } public void Live(double time){ this.life -= time; } public Force(double magnitude=0, double yaw=0, double pitch=0) { this.vector = Vector3D.FromPolar(magnitude, yaw, pitch); this.life = -1; } } class Entity { private Vector3D position; private Vector3D velocity; private Vector3D acceleration; private double mass; public List forces = new List(); public Vector3D Pos { get { return position; } set { position = value; } } public Vector3D Vel { get { return velocity; } set { velocity = value; } } public Vector3D Accel { get { return acceleration; } set { acceleration = value; } } public Entity(){ this.position = new Vector3D(); this.mass = 1; } public double Mass{ get { return mass; } set { if(value >0){ mass = value; } } } public void ApplyForce(Force f,double life=-1){ f.Life = life; this.forces.Add(f); } public void Tick(){ Vector3D accel = new Vector3D(); foreach(Force f in this.forces){ if(f.Life >0 || f.Life == -1){ Vector3D ac = f.vector / this.mass; if(f.Life >0){ f.Live(1); } accel += ac; } } this.position += this.velocity * 1/20; this.velocity += this.acceleration * 1/20; this.acceleration = accel; } } }

Physics Simulator WIP