RotatedGrid 0.1.0

C# 中的旋转网格

🎨 用于半色调抖动等。

该项目提供了一个枚举器，用于在指定的旋转网格上创建指定频率的网格坐标。这在需要为 CMYK 处理创建半色调抖动网格时非常有用。

这是 Rust 资源库 rotated-grid 的移植版本。以下屏幕截图是从该存储库中截取的；此存储库不包含任何可视化代码。

<div align="center" style="text-align: center"> <img src="https://raw.githubusercontent.com/sunsided/rotated-grid/main/readme/grid.png" alt="CMYK 网格示例" /> </div>

示例

在齐网格上进行枚举（0 度旋转）。点通过 dx=2 和 dy=3 均匀分布，位于 10×7 矩形内部。未使用偏移。

const float width = 10.0F;
const float height = 7.0F;

var grid = new GridPositionIterator(width, height, 2.0F, 3.0F, 0.0F, 0.0F, Angle.Zero);

var coordinates = new List<GridCoord>();
while (grid.MoveNext())
{
    coordinates.Add(grid.Current);
}

coordinates.Count.Should().Be(15);
coordinates.Should().ContainInOrder(
    // First row
    new GridCoord(1.0F, 0.5F),
    new GridCoord(3.0F, 0.5F),
    new GridCoord(5.0F, 0.5F),
    new GridCoord(7.0F, 0.5F),
    new GridCoord(9.0F, 0.5F),
    // Second row row
    new GridCoord(1.0F, 3.5F),
    new GridCoord(3.0F, 3.5F),
    new GridCoord(5.0F, 3.5F),
    new GridCoord(7.0F, 3.5F),
    new GridCoord(9.0F, 3.5F),
    // Third row
    new GridCoord(1.0F, 6.5F),
    new GridCoord(3.0F, 6.5F),
    new GridCoord(5.0F, 6.5F),
    new GridCoord(7.0F, 6.5F),
    new GridCoord(9.0F, 6.5F)
    );

在旋转网格上进行枚举；以下示例中使用了 45 度旋转

const float width = 10.0F;
const float height = 7.0F;
const float angle = 45.0F;

var grid = new GridPositionIterator(width, height, 2.0F, 2.0F, 0.0F, 0.0F, Angle.FromDegrees(angle));

var coordinates = new List<GridCoord>();
while (grid.MoveNext())
{
    coordinates.Add(grid.Current);
}

coordinates.Count.Should().Be(17);
coordinates.Should().ContainInOrder(
    // First row
    new GridCoord(0.7573595F, 2.0857863F),
    new GridCoord(2.1715730F, 0.6715729F),
    // Second row
    new GridCoord(0.7573595F, 4.9142137F),
    new GridCoord(2.1715730F, 3.5000000F),
    new GridCoord(3.5857863F, 2.0857863F),
    new GridCoord(5.0000000F, 0.6715729F),
    // Third row
    new GridCoord(2.1715730F, 6.3284273F),
    new GridCoord(3.5857863F, 4.9142137F),
    new GridCoord(5.0000000F, 3.5000000F),
    new GridCoord(6.4142137F, 2.0857863F),
    new GridCoord(7.8284273F, 0.6715729F),
    // Fourth row
    new GridCoord(5.0000000F, 6.3284273F),
    new GridCoord(6.4142137F, 4.9142137F),
    new GridCoord(9.2426405F, 2.0857863F),
    // Fifth row
    new GridCoord(7.8284273F, 6.3284273F),
    new GridCoord(9.2426405F, 4.9142137F)
);