compose-tetris
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绘画屏幕边框的公式
以绘制左上部分举例: 注释掉的是原本的代码 我个人理解是按x轴的中心去绘制,然后垂直下滑到y轴的中心点。因为x和y的边长不一样。 但是代码的两个点的y,都看不明白是啥意思。并不是在轴的中心点。
sample:
var path = Path().apply {
moveTo(topLef.x, topLef.y)
lineTo(topRight.x, topRight.y)
lineTo(
topRight.x / 2 + topLef.x / 2,
// topLef.y + topRight.x / 2 + topLef.x / 2 - topLef.x
topLef.y + topRight.x / 2 - topLef.x / 2
)
lineTo(
topRight.x / 2 + topLef.x / 2,
// bottomLeft.y - topRight.x / 2 + topLef.x / 2
bottomLeft.y / 2 + topLef.y / 2,
)
lineTo(bottomLeft.x, bottomLeft.y)
close()
}
drawPath(path, Color.Black.copy(0.5f))