begla

public static float lerp(float x, float x1, float x2, float q00, float q01) {
  return ((x2 - x) / (x2 - x1)) * q00 + ((x - x1) / (x2 - x1)) * q01;
}

public static float biLerp(float x, float y, float q11, float q12, float q21, float q22, float x1, float x2, float y1, float y2) {
  float r1 = lerp(x, x1, x2, q11, q21);
  float r2 = lerp(x, x1, x2, q12, q22);

  return lerp(y, y1, y2, r1, r2);
}