分享程序员开发的那些事...
更新时间：2022-09-15 13:21:20
全局参数：
private bool _isJumping;
private bool _jumpKeyDown;
private float _jumpHeight = 100f;
private TimeSpan _jumpTimeSpan = TimeSpan.FromMilliseconds(500);
private double _jumpStartTime;
private float _jumpStartPosition;
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Update中的代码：
_jumpKeyDown = Keyboard.GetState().IsKeyDown(Keys.Space); squarePosition.Y = DoJump(squarePosition.Y, gameTime);
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高度算法函数：
private float DoJump(float velocityY, GameTime gameTime)
{ if (_jumpKeyDown && !_isJumping)
{
_isJumping = true;
_jumpStartTime = gameTime.TotalGameTime.TotalMilliseconds;
_jumpStartPosition = velocityY;
}
if (_isJumping)
{
var jumpTime = gameTime.TotalGameTime.TotalMilliseconds - _jumpStartTime;
var topTime = _jumpTimeSpan.TotalMilliseconds / 2;
if (jumpTime < _jumpTimeSpan.TotalMilliseconds)
{
if (jumpTime > topTime)
{
velocityY =
_jumpStartPosition-_jumpHeight - Convert(-(jumpTime - topTime) * _jumpHeight / (_jumpTimeSpan.TotalMilliseconds - topTime));
}
else
{
velocityY =_jumpStartPosition+ Convert(-( jumpTime)*_jumpHeight/topTime);
}
}
else
{
_isJumping = false;
velocityY = _jumpStartPosition;
}
}
return velocityY;
} |
本文转自today4king博客园博客，原文链接：http://www.cnblogs.com/jinzhao/archive/2012/06/03/2533297.html，如需转载请自行联系原作者