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drawing_rounded_rectangles
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drawing_rounded_rectangles [2021/01/26 23:45] richardrussell |
drawing_rounded_rectangles [2021/01/26 23:46] (current) richardrussell |
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| //by Richard Russell, January 2021// | //by Richard Russell, January 2021// | ||
| - | Neither //BBC BASIC for Windows// nor //BBC BASIC for SDL 2.0// supports drawing anti-aliased **rounded rectangles** (that is, boxes with radiused corners). Fortunately it is easy enough to decompose that shape into simpler components (straight lines and 90° arcs) which can be drawn using the respective anti-aliased graphics libraries (**gdiplib.bbc** or **aagfxlib.bbc** respectively). | + | Neither //BBC BASIC for Windows// nor //BBC BASIC for SDL 2.0// supports drawing anti-aliased **rounded rectangles** (that is, boxes with radiused corners). Fortunately it is easy enough to decompose that shape into simpler components (straight lines and 90° arcs) which can be drawn using the supplied anti-aliased graphics libraries (**gdiplib.bbc** or **aagfxlib.bbc** respectively). |
| - | Here are the two routines. The parameters are the **x and y coordinates** of the bottom left-hand corner, the **width and height**, the corner radius (all in BBC BASIC graphics units), the line **thickness** (pixels) and the **colour**. Note that the colour value has a different format depending on the library, &AARRGGBB for **gdiplib** and &AABBGGRR for **aagfxlib**. | + | Here are the two routines. The parameters are the **x and y coordinates** of the bottom left-hand corner, the **width and height**, the corner **radius** (all in BBC BASIC graphics units), the line **thickness** (pixels) and the **colour**. Note that the colour value has a different format depending on the library, &AARRGGBB for **gdiplib** and &AABBGGRR for **aagfxlib**. |
| BB4W version: | BB4W version: | ||
drawing_rounded_rectangles.txt · Last modified: 2021/01/26 23:46 by richardrussell
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