Keep in mind that some transformations might bring the shape entirely outside the form. The code is quite short, and you can easily insert additional transformations or change their order, and see how the shape is transformed. Each button on the right performs a different transformation or combination of transformations. This project allows you to apply transformations to an entity that consists of a rectangle that contains a string and a small bitmap, as shown in Figure 14.16. Download the Transformations example project of this section. In specific, you’ll see how to apply transformations to print rotated strings on a page.
You will find some real-world examples of transformations in Chapter where I discuss printing with Visual Basic. The effect of multiple transformations might be cumulative, but the order in which transformations are performed makes a big difference. To start a new transformation after drawing some shapes on the Graphics object, call the Reset-Transform method, which clears the transformation matrix. TranslateTransform(30, 60) Code language: CSS ( css ) The ScaleTransform method accepts as arguments scaling factors for the horizontal and vertical directions: The Graphics object provides the ScaleTransform, TranslateTransform, and RotateTransform methods, and you can specify the transformation to be applied to the shape by calling one or more of these methods and passing the appropriate argument(s). Transformations are stored in a 5 × 5 matrix, but you need not set it up yourself. A rotation by 180 degrees is equivalent to flipping the shape vertically and horizontally. The rotation transformation rotates a shape by a specified angle, expressed in degrees 360 degrees correspond to a full rotation, and the shape appears the same.If you translate a rectangle by 30 pixels along the x-axis and 90 pixels along the y-axis, the new origin will be 30 pixels to the right and 90 pixels down from the original rectangle’s top-left corner. The translation transformation moves a shape by a specified distance.If you scale an ellipse by 0.5, you’ll get another ellipse that’s half as wide and half as tall as the original one.
0 kommentar(er)
