44 lines
893 B
Go
44 lines
893 B
Go
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package shared
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type Coordinate struct {
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X int
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Y int
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}
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func (c *Coordinate) Neighbours(gridWidth int, gridHeight int, diagonal bool) (out []Coordinate) {
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spaceLeft := c.X > 0
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spaceRight := c.X < gridWidth-1
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spaceUp := c.Y > 0
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spaceDown := c.Y < gridHeight-1
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if spaceLeft {
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out = append(out, Coordinate{c.X - 1, c.Y})
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}
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if spaceRight {
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out = append(out, Coordinate{c.X + 1, c.Y})
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}
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if spaceUp {
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out = append(out, Coordinate{c.X, c.Y - 1})
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}
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if spaceDown {
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out = append(out, Coordinate{c.X, c.Y + 1})
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}
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if diagonal {
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if spaceUp && spaceLeft {
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out = append(out, Coordinate{c.X - 1, c.Y - 1})
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}
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if spaceUp && spaceRight {
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out = append(out, Coordinate{c.X + 1, c.Y - 1})
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}
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if spaceDown && spaceLeft {
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out = append(out, Coordinate{c.X - 1, c.Y + 1})
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}
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if spaceDown && spaceRight {
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out = append(out, Coordinate{c.X + 1, c.Y + 1})
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}
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}
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return
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}
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