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package main
import (
"github.com/kch42/gomcmap/mcmap"
)
type BiomeGetter interface {
GetBiome(x, z int) (mcmap.Biome, bool)
}
type XZPos struct {
X, Z int
}
type Change map[XZPos]mcmap.Biome
type Tool interface {
SingleClick() bool // Whether only one click should be performed (true) or the action should be repeated, if the mouse is dragged
Do(bio mcmap.Biome, bioget BiomeGetter, x, z int) Change
}
type drawTool struct {
radGetter func() int
}
func (d *drawTool) SingleClick() bool { return false }
func (d *drawTool) Do(bio mcmap.Biome, bioget BiomeGetter, x, z int) Change {
rad := d.radGetter()
if rad <= 0 {
return nil
}
change := make(Change)
for xp := x - (rad - 1); xp < x+rad; xp++ {
for zp := z - (rad - 1); zp < z+rad; zp++ {
change[XZPos{xp, zp}] = bio
}
}
return change
}
func NewDrawTool(radGetter func() int) *drawTool {
return &drawTool{radGetter}
}
type fillTool struct{}
func (f *fillTool) SingleClick() bool { return true }
func (f *fillTool) Do(bio mcmap.Biome, bioget BiomeGetter, x, z int) Change {
oldbio, ok := bioget.GetBiome(x, z)
if !ok {
return nil
}
change := make(Change)
floodfill(oldbio, bio, bioget, x, z, change)
return change
}
func floodfill(oldbio, newbio mcmap.Biome, bioget BiomeGetter, x, z int, change Change) {
pos := XZPos{x, z}
if _, ok := change[pos]; ok {
return
}
if bio, ok := bioget.GetBiome(x, z); ok && (bio == oldbio) {
change[pos] = newbio
floodfill(oldbio, newbio, bioget, x-1, z, change)
floodfill(oldbio, newbio, bioget, x+1, z, change)
floodfill(oldbio, newbio, bioget, x, z-1, change)
floodfill(oldbio, newbio, bioget, x, z+1, change)
}
}
func NewFillTool() *fillTool {
return new(fillTool)
}
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