请问DirectDraw7的旋转问题
smzh8 2006-09-21 01:41:53 下面一段旋转代码,显示无结果,请问该如何实现旋转.
屏幕尺寸为0,0,800,600
f.lRotationAngle = 10
r.Left = 200
r.Top = 200
r.Right = 250
r.Bottom = 250
r1.Left = 0
r1.Top = 0
r1.Right = 50
r1.Bottom = 50
b.BltFx r, c, r1, DDBLT_ROTATIONANGLE, f