// x-run: make run
#include <raylib.h>
#include <raymath.h>
#include <string.h>

#define TRAIL_LENGTH 360

int main(int argc, char **argv) {
  SetConfigFlags(FLAG_WINDOW_RESIZABLE);
  InitWindow(800, 600, "vis/follow-mouse");
  SetTargetFPS(120);

  Vector2 trail[TRAIL_LENGTH];
  Vector2 ex_trail[TRAIL_LENGTH];

  Vector2 pos = { 0, 0 };

  while (!WindowShouldClose()) {
    BeginDrawing();
    ClearBackground(BLACK);
    memmove(&trail[0], &trail[1], sizeof(Vector2) * (TRAIL_LENGTH - 1));
    trail[TRAIL_LENGTH - 1] = GetMousePosition();
    DrawLineStrip(trail, TRAIL_LENGTH, RED);

    pos = Vector2Lerp(pos, trail[TRAIL_LENGTH - 1], 0.125);
    DrawCircleLines(pos.x, pos.y, 8, WHITE);
    memmove(&ex_trail[0], &ex_trail[1], sizeof(Vector2) * (TRAIL_LENGTH - 1));
    ex_trail[TRAIL_LENGTH - 1] = pos;

    DrawLineStrip(ex_trail, TRAIL_LENGTH, GREEN);


    EndDrawing();
  }
}