84 lines
1.9 KiB
Go
84 lines
1.9 KiB
Go
// Package rectangle provides a model and methods for representing and manipulating rectangles.
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package rectangle
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import (
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"math"
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"github.com/StevanFreeborn/advent-of-code-2025/internal/position"
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)
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type Rectangle interface {
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Corners() []position.Position
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MaxRow() int
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MaxColumn() int
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MinRow() int
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MinColumn() int
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Area() int
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Center() position.Position
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}
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type rectangle struct {
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corners []position.Position
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maxRow int
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maxColumn int
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minRow int
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minColumn int
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area int
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center position.Position
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}
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func From(cornerOne position.Position, cornerTwo position.Position) Rectangle {
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thirdCorner := position.From(cornerOne.Row(), cornerTwo.Column())
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fourthCorner := position.From(cornerTwo.Row(), cornerOne.Column())
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corners := []position.Position{cornerOne, cornerTwo, thirdCorner, fourthCorner}
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maxRow := math.Max(float64(cornerOne.Row()), float64(cornerTwo.Row()))
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maxColumn := math.Max(float64(cornerOne.Column()), float64(cornerTwo.Column()))
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minRow := math.Min(float64(cornerOne.Row()), float64(cornerTwo.Row()))
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minColumn := math.Min(float64(cornerOne.Column()), float64(cornerTwo.Column()))
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area := int((maxRow - minRow + 1) * (maxColumn - minColumn + 1))
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centerRow := (maxRow + minRow) / 2
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centerColumn := (maxColumn + minColumn) / 2
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center := position.From(int(centerRow), int(centerColumn))
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return rectangle{
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corners: corners,
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maxRow: int(maxRow),
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maxColumn: int(maxColumn),
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minRow: int(minRow),
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minColumn: int(minColumn),
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area: area,
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center: center,
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}
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}
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func (r rectangle) Corners() []position.Position {
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return r.corners
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}
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func (r rectangle) MaxRow() int {
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return r.maxRow
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}
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func (r rectangle) MinRow() int {
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return r.minRow
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}
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func (r rectangle) MaxColumn() int {
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return r.maxColumn
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}
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func (r rectangle) MinColumn() int {
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return r.minColumn
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}
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func (r rectangle) Area() int {
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return r.area
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}
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func (r rectangle) Center() position.Position {
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return r.center
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}
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