我试图构建一个"缩放以适应" Lua算法(Codea)。想象一下Canvas上的任何形状。我想自动缩放这个形状的中心,使它占据Canvas的大部分区域并以它为中心。最后,我希望能够缩小到最初的情况,因此矩阵应该完成这项工作。有一个简单的方法吗?任何代码,即使不是Lua,都是受欢迎的。
答案 0 :(得分:1)
在C#中,
double aspectRatio = shape.Width / shape.Height;
if (aspectRatio > 1)
{
// Width defines the layout
double origShapeWidth = shape.Width;
shape.Width = panel.Width;
shape.Height = panel.Width * shape.Height / origShapeWidth;
// Center the shape
double margin = (panel.Height - shape.Height) / 2;
shape.Margin = new Thickness(0, margin, 0, margin);
}
else
{
// Height defines the layout
double origShapeHeight = shape.Height;
shape.Height = panel.Height;
shape.Width = panel.Height * shape.Width / origShapeHeight;
// Center the shape
double margin = (panel.Width - shape.Width) / 2;
shape.Margin = new Thickness(margin, 0, margin, 0);
}