Unity fishing game development tutorial and source code

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Project Analysis

Main function points:

• fish movement route
  • A simple movement method is used here: random position and then random fish straight line or update the angle of the fish every frame to achieve circular movement.
• The gun moves with the mouse or click position
  • This uses coordinate conversion reference code

  •  private void Update()
        {
            Vector3 mousePos; // 鼠标位置
            // RectTransformUtility.ScreenPointToWorldPointInRectangle(RectTransform rect, Vector2 screenPoint, Camera cam, out Vector3 worldPoint);
            // 将屏幕空间点转换为位于给定 RectTransform 平面上的世界空间中的位置
            // canvas，鼠标的位置，观察的摄像机，out 参数：把计算得到的值传递回来
            RectTransformUtility.ScreenPointToWorldPointInRectangle(canvas, new Vector2(Input.mousePosition.x, Input.mousePosition.y), mainCamera, out mousePos);
            float z; // z轴的旋转
            if (mousePos.x > transform.position.x) // 鼠标位置在正前方的右边
            {
                //public static float Angle(Vector3 from, Vector3 to); // 两个向量的角度
                // Vector3.up：正前方，mousePos - transform.position：鼠标到枪的向量
                z = -Vector3.Angle(Vector3.up, mousePos - transform.position);
            }
            else // 鼠标位置在正前方的左边
            {
                z = Vector3.Angle(Vector3.up, mousePos - transform.position);
            }
            // 设置枪的目标位置
            transform.localRotation = Quaternion.Euler(0, 0, z);
        }

• Bullet generation and destruction
  • After the bullet is generated, set a certain amount of time to automatically destroy it. Of course, you can also create an object pool to improve performance.
• bullet hits fish
  • Add coliider to fish and perform collision detection (OnTriggerEnter2D)

Project source code