Boid Foundational Class / Perfect Unit Circle - Smooth Movement

main.cpp

// Written by German Adrian Hoyos
// Linkedin: https://www.linkedin.com/in/adrian-i-81a32615b/
// Common c++ headers + custom headers
#include "include/MasterHeader.h"

class Player {
   public:
      Vector2 xy;
      Vector2 attackVector;
      float x;
      float y;
      float radius;
      float angle = 90 / 180 * PI; // convert to degrees
      float thrustAngle = 0 / 180 * PI;
      float rotation = 0.017;
      float turnSpeed = 2.5;
      float acceleration = 0.05;
      float friction = 0.02;

      Player(float x, float y, float radius)
      : x(x), y(y), radius(radius) {}

      void determineAngle(){
         if (IsKeyDown(KEY_A)){
            angle -= rotation * turnSpeed;
         }
         if (IsKeyDown(KEY_D)){
            angle += rotation * turnSpeed;
         }
         if (IsKeyDown(KEY_W)){
            thrustAngle = angle;
            attackVector.x  += acceleration * cosf(thrustAngle);
            attackVector.y  += acceleration * sinf(thrustAngle); 
         } else if (!IsKeyDown(KEY_W))
         {
            if (acceleration > 0.0f){
               attackVector.x -= friction * attackVector.x;
               attackVector.y -= friction * attackVector.y;
            }
         }
      }

      void accelerate(){
         x += attackVector.x;
         y += attackVector.y;
      }

      void draw(){
         xy.x = x;
         xy.y = y;
         DrawCircleSectorLines(xy, radius, 0.0f, 360.0f, 0, GREEN);
         DrawLineV(xy,{xy.x + radius * cosf(angle), xy.y + radius * sinf(angle)}, RED); 
         determineAngle();
         accelerate();
      }
};

int main() {
   int screenWidth = 800;
   int screenHeight = 600;
   raylib::Window w(screenWidth, screenHeight, "Adrians Boids Project");
   SetTargetFPS(60);

   Player myDrone = Player(500.0f,300.0f,100.0f);

   while (!w.ShouldClose()) {
      BeginDrawing();
      ClearBackground(BLACK);
      TimeClass::displayGameTime(); // displays FPS and various other stats 

      myDrone.draw();

      EndDrawing();
   }

   return 0;
}