/// <summary>
/// 自己的帧逻辑更新函数
/// </summary>
private void MyFKGameUpdate(GameTime gameTime)
{
// 每帧将按键事件注入给自定义KeyboardState中
FKKeyboardState.SetKeys(m_HookFormKeysList);
m_HookFormKeysList.Clear();
// 检查本帧的按键操作情况
HandleInputInThisFrame();
// 游戏状态更新
m_GameState.Update(gameTime);
}
/// <summary>
/// 每帧更新键盘按键状态
/// </summary>
/// <param name="gameTime"></param>
public override void Update(GameTime gameTime)
{
_lastKeyboardState = _keyboardState;
if (_bIsUseCustomKeyboardState)
{
_keyboardState = FKKeyboardState.GetState();
}
else
{
_keyboardState = Keyboard.GetState();
}
// 输出Debug信息
DebugOutput();
base.Update(gameTime);
}
/// <summary>
/// 按键消息处理
/// </summary>
private void HandleInput()
{
var ms = Mouse.GetState();
var ks = FKKeyboardState.GetState();
// 若鼠标不在Windows管理区内，则不处理
if (!Program.s_GameInstance.Window.ClientBounds.Contains(ms.Position))
{
System.Diagnostics.Debug.WriteLine("ClientBounds: " + Program.s_GameInstance.Window.ClientBounds.ToString());
System.Diagnostics.Debug.WriteLine("MousePosition: " + ms.Position.ToString());
return;
}
// 左键按下
if (ms.LeftButton == ButtonState.Pressed && m_prevMouseState.LeftButton == ButtonState.Released)
{
System.Diagnostics.Debug.WriteLine("LefeButtonDown");
m_nStartDragX = ms.X;
m_nStartDragY = ms.Y;
if (ks.IsKeyDown(Keys.LeftControl))
{
m_bIsZoomingCamera = true; // 按下Ctrl则缩放
}
else
{
m_bIsDraggingCamera = true; // 仅仅是拖拽
}
}
// 左键释放
if (ms.LeftButton == ButtonState.Released && m_prevMouseState.LeftButton == ButtonState.Pressed)
{
System.Diagnostics.Debug.WriteLine("LefeButtonUp");
m_bIsDraggingCamera = false;
m_bIsZoomingCamera = false;
}
// 处理拖拽
if (m_bIsDraggingCamera)
{
float fTurnSpeed = 8f;
float offsetX = ((ms.X - m_nStartDragX) * fTurnSpeed * 0.001f); // pitch degree
float offsetY = ((ms.Y - m_nStartDragY) * fTurnSpeed * 0.001f); // yaw degree
var angleRadian = m_Camera.AngleRadian;
angleRadian.X -= offsetY;
angleRadian.Y -= offsetX;
angleRadian.Y = MathHelper.Clamp(angleRadian.Y, 0, MathHelper.Pi * 2);
angleRadian.X = MathHelper.Clamp(angleRadian.X, -(MathHelper.PiOver2 - 0.1f), (MathHelper.PiOver2 - 0.1f));
m_Camera.AngleRadian = angleRadian;
m_nStartDragX = ms.X;
m_nStartDragY = ms.Y;
}
// 处理缩放
if (m_bIsZoomingCamera == true)
{
float speed = 8f;
float offsetY = ((ms.Y - m_nStartDragY) * speed * 0.001f);
m_Camera.TargetDistance += offsetY;
m_Camera.TargetDistance = MathHelper.Clamp(m_Camera.TargetDistance, 1.0f, 10);
m_nStartDragY = ms.Y;
}
// 鼠标滚轮
var wheelDelta = m_prevMouseState.ScrollWheelValue - ms.ScrollWheelValue;
if (wheelDelta != 0)
{
m_Camera.TargetDistance += (wheelDelta / 100.0f);
m_Camera.TargetDistance = MathHelper.Clamp(m_Camera.TargetDistance, 1.0f, 10);
}
// 记录上一次鼠标数据信息
m_prevMouseState = ms;
}