xna 触控操作 备忘
<div id="cnblogs_post_body"><div class="cnblogs_code"> private void HandleInput() { while (TouchPanel.IsGestureAvailable) { GestureSample gestureSample = TouchPanel.ReadGesture(); switch (gestureSample.GestureType) { case GestureType.FreeDrag: rotationXAmount += gestureSample.Delta.X; rotationYAmount -= gestureSample.Delta.Y; break; case GestureType.Pinch: float gestureValue = 0; float minFOV = 60; float maxFOV = 30; float gestureLengthToZoomScale = 10; Vector2 gestureDiff = gestureSample.Position - gestureSample.Position2; gestureValue = gestureDiff.Length() / gestureLengthToZoomScale; if (null != prevLength) // Skip the first pinch event cameraFOV -= gestureValue - prevLength.Value; cameraFOV = MathHelper.Clamp(cameraFOV, maxFOV, minFOV); prevLength = gestureValue; break; case GestureType.PinchComplete: prevLength = null; break; default: break; } } }
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