描述

 

更新该刷的当前变换矩阵的产品本身和翻译矩阵.

 

C++ Syntax

 

 

FreeBASIC 语法

 

 

参数

 

dx

 

[in]单精度数指定翻译的水平分量.

 

dy

 

[in]单精度数指定翻译的垂直分量.

 

order

 

该MatrixOrder指定相乘的顺序[in, optional]元.MatrixOrderPrepend指定传递矩阵是在左边,和MatrixOrderAppend指定传递矩阵是正确的.默认值是MatrixOrderPrepend.

 

返回值

 

如果该方法成功,则返回Ok,这是对Status枚举元素.

如果这个方法失败,它返回一个枚举的其他元素的Status.

 

备注

 

一个3？矩阵可以存储任意序列的仿射变换.如果你有几个3？矩阵,其中每一个表示仿射变换,这些矩阵的产品是一个单一的3？表示整个变换序列的矩阵.该产品表示的变换称为复合变换.例如,假设矩阵S表示缩放,和矩阵T代表翻译.如果矩阵M是产品ST,然后矩阵M代表复合变换：规模第一,然后翻译.

矩阵乘法的顺序是重要的.在一般情况下,矩阵的乘积RT不是矩阵的乘积TR相同.在上一段中给出的例子中,由RT复合变换（旋转,然后翻译）不为代表的TR复合变换相同（第一次翻译,然后旋转）.

 

引用文件

 

CGpBrush.inc (include CGdiPlus.inc)

 

示例

 

' ========================================================================================

' The following example creates a linear gradient brush and uses it to fill a rectangle.

' Next, the code modifies the brush's transformation matrix, applying a composite transformation,

' and then fills a rectangle with the transformed brush.

' ========================================================================================

SUB Example_TranslateTransform (BYVAL hdc AS HDC)

 

  ' // Create a graphics object from the window device context

  DIM graphics AS CGpGraphics = hdc

  ' // Get the DPI scaling ratio

  DIM rxRatio AS SINGLE = graphics.GetDpiX / 96

  DIM ryRatio AS SINGLE = graphics.GetDpiY / 96

  ' // Set the scale transform

  graphics.ScaleTransform(rxRatio, ryRatio)

 

  DIM rc AS GpRect = GDIP_RECT(0, 0, 80, 40)

  DIM linGrBrush AS CGpLinearGradientBrush = CGpLinearGradientBrush(@rc, _

      GDIP_ARGB(255, 255, 0, 0), GDIP_ARGB(255, 0, 0, 255), LinearGradientModeHorizontal)

 

  ' // Fill a large area with the gradient brush (no transformation).

  graphics.FillRectangle(@linGrBrush, 0, 0, 800, 150)

 

  ' // Apply a composite transformation: first scale, then translate.

  linGrBrush.ScaleTransform(2, 1)                           ' // horizontal doubling

  linGrBrush.TranslateTransform(30, 0, MatrixOrderAppend)   ' // translation

 

  ' // Fill a large area with the transformed linear gradient brush.

  graphics.FillRectangle(@linGrBrush, 0, 200, 800, 150)

 

END SUB

' ========================================================================================