51 lines
857 B
Go
51 lines
857 B
Go
package goat
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// Index represents a position within an ASCII diagram.
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type Index struct {
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x int
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y int
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}
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// Pixel represents the on-screen coordinates for an Index.
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type Pixel Index
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func (i *Index) asPixel() Pixel {
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return Pixel{x: i.x * 8, y: i.y * 16}
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}
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func (i *Index) asPixelXY() (int, int) {
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p := i.asPixel()
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return p.x, p.y
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}
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func (i *Index) east() Index {
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return Index{i.x + 1, i.y}
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}
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func (i *Index) west() Index {
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return Index{i.x - 1, i.y}
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}
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func (i *Index) north() Index {
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return Index{i.x, i.y - 1}
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}
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func (i *Index) south() Index {
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return Index{i.x, i.y + 1}
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}
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func (i *Index) nWest() Index {
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return Index{i.x - 1, i.y - 1}
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}
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func (i *Index) nEast() Index {
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return Index{i.x + 1, i.y - 1}
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}
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func (i *Index) sWest() Index {
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return Index{i.x - 1, i.y + 1}
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}
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func (i *Index) sEast() Index {
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return Index{i.x + 1, i.y + 1}
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}
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