day22, part1, struggle

day22/notes.org

@@ -26,8 +26,26 @@ store z, and have 'settledZ', maybe with default -1?
 ** DONE now i guess what? do i want a sorted map? or just map from height to blocks on that hight?
 let's read file, and calc max height present?
 i suppose funciton to read file could also be initially entered via test, right?
-** TODO now go through the z levels, block by block, doing setting.
+** DONE now go through the z levels, block by block, doing setting.
 i suppose i could organize setting methods around Space?
 it will store (settledOnZ) and (maxSettledOnXY)
-** TODO [#A] when i settle single block. the maxSettledOnXY - should use (z + height)
+** DONE [#A] when i settle single block. the maxSettledOnXY - should use (z + height)
 ** i can already imagine secon part? what is the most volume that can be disintegrated? or what? most volume is just all
+* part 1, wrong answer.
+i guess try to go, setting the input? block after block and try to check the calculations?
+
+what i want to check:
+how maxSettledOnXY works, how linking works. maybe i'll find a problem in few steps =C
+** can't see anything just glancing around.
+maybe then trying to pick a block and track what's under it?
+* ok. let's try to brute force?
+for each block, remove it?
+create new space and try to settle it
+** this is shit. why blocks move up?
+2023/12/22 12:12:24 >>> starting for block [Block 1 - x:0-2, y:0-0, z:1, h:0, isSettled true] (supports [[Block 3 - x:0-0, y:0-2, z:3, h:0, isSettled true] [Block 4 - x:2-2, y:0-2, z:3, h:0, isSettled true] [Block 3 - x:0-0, y:0-2, z:2, h:0, isSettled true] [Block 4 - x:2-2, y:0-2, z:2, h:0, isSettled true]])
+2023/12/22 12:12:24 block [Block 2 - x:0-2, y:2-2, z:2, h:0, isSettled true] moved from 1 to 2
+2023/12/22 12:12:24 block [Block 3 - x:0-0, y:0-2, z:3, h:0, isSettled true] moved from 2 to 3
+2023/12/22 12:12:24 block [Block 4 - x:2-2, y:0-2, z:3, h:0, isSettled true] moved from 2 to 3
+2023/12/22 12:12:24 block [Block 5 - x:0-2, y:1-1, z:4, h:0, isSettled true] moved from 3 to 4
+2023/12/22 12:12:24 block [Block 6 - x:1-1, y:1-1, z:5, h:1, isSettled true] moved from 4 to 5
+2023/12/22 12:12:24 for block [Block 1 - x:0-2, y:0-0, z:1, h:0, isSettled true] new space has 5 moved

day22/printingSpace.go

@@ -0,0 +1,38 @@
+package day22
+
+import (
+	"math"
+
+	"github.com/tidwall/pinhole"
+)
+
+func TestPinhole() {
+	p := pinhole.New()
+	p.DrawCube(-0.3, -0.3, -0.3, 0.3, 0.3, 0.3)
+	p.Rotate(math.Pi/3, math.Pi/2, 0)
+	p.SavePNG("cube.png", 500, 500, nil)
+}
+
+func PrintSpace(s Space, filename string) {
+	// pinhole is from -1 to 1. let's use from 0 to 1.
+	// so coord should be divided by max height, and let's hope that they are not too wide
+
+	rotation := []float64{math.Pi/3, math.Pi/6, 0}
+
+	p := pinhole.New()
+
+	p.DrawRect(-1, -1, 1, 1, 0)
+
+	for _, zLevel := range s.SettledOnZ {
+		for _, block := range zLevel {
+			p.DrawCube(float64(block.XMin) / float64(s.MaxZ),
+				float64(block.YMin) / float64(s.MaxZ),
+				float64(block.Z) / float64(s.MaxZ),
+				float64(block.XMax + 1) / float64(s.MaxZ),
+				float64(block.YMax + 1) / float64(s.MaxZ),
+				float64(block.Z + block.ZHeight + 1) / float64(s.MaxZ))
+		}
+	}
+	p.Rotate(rotation[0], rotation[1], rotation[2])
+	p.SavePNG(filename, 1920, 1080, nil)
+}

day22/sandSlabs.go

@@ -6,13 +6,13 @@ import (
 
 func Run() int {
 	fmt.Print("oi, hello day 22")
-	filename := "day22/example"
+	filename := "day22/input"
 	blocks := ReadBlockFile(filename)
 	byZ := BlocksByZ(blocks)
 
 	space := NewSpace(byZ)
 	space.SettleAll()
 
-	result := space.CountFreeBlocks()
+	result := space.ThirdTimeCountFreeBlocks()
 	return result
 }

day22/space.go

@@ -1,6 +1,11 @@
 package day22
 
-import "log"
+import (
+	// "fmt"
+	"log"
+	"slices"
+	// "time"
+)
 
 type Space struct {
 	MaxZ           uint
@@ -18,6 +23,26 @@ func NewSpace(blocksByZ [][]*Block) Space {
 	}
 }
 
+func (s *Space) AgainCountFreeBlocks() (result int) {
+	for _, row := range s.SettledOnZ {
+		for _, block := range row {
+			thisSupports := block.Supports
+			canDisintegrate := true
+			for _, blockThisSupports := range thisSupports {
+				if len(blockThisSupports.SupportedBy) == 1 {
+					// we cannot disintigrate this block
+					canDisintegrate = false
+				}
+			}
+			if canDisintegrate {
+				result += 1
+			}
+		}
+	}
+	return
+}
+
+
 func (s *Space) CountFreeBlocks() (result int) {
 	allBlocks := make(map[*Block]any)
 
@@ -25,9 +50,10 @@ func (s *Space)CountFreeBlocks() (result int) {
 		for _, block := range row {
 			allBlocks[block] = struct{}{}
 			if len(block.SupportedBy) == 1 {
-				log.Printf("in block %+v. only support is %+v", block, block.SupportedBy)
+				onlySupport := block.SupportedBy[0]
-				log.Printf("should be NOT OK to remove %+v", block.SupportedBy)
+				log.Printf("in block %+v. only support is %+v", block, onlySupport)
-				delete(allBlocks, block.SupportedBy[0])
+				log.Printf("should be NOT OK to remove %+v", onlySupport)
+				delete(allBlocks, onlySupport)
 			}
 		}
 	}
@@ -35,21 +61,61 @@ func (s *Space)CountFreeBlocks() (result int) {
 	return
 }
 
-func (s *Space)SettleAll() {
+func (s *Space) ThirdTimeCountFreeBlocks() (result int) {
-	for i := uint(1); i <= s.MaxZ; i++ {
+	// for each block create a new space without it. try to settle and check if 0 moved
-		s.SettleZ(i)
+	log.Println(">>>>> starting hardcode count <<<<<")
+	for rowNum, row := range s.SettledOnZ {
+		for blockNum, block  := range row {
+			log.Printf(">>> starting for block %+v (supports %+v)\n", block, block.Supports)
+			newUnsettled := slices.Clone(s.SettledOnZ)
+			for rowNum, row := range newUnsettled {
+				newUnsettled[rowNum] = slices.Clone(row)
 			}
+			newUnsettled[rowNum] = slices.Delete(newUnsettled[rowNum], blockNum, blockNum+1)
+			// and now copy the blocks 
+			for rowNum, row := range newUnsettled {
+				for blockNum, block := range row {
+					newBlock := *block
+					newUnsettled[rowNum][blockNum] = &newBlock
+				}
+			}
+			
+			newSpace := NewSpace(newUnsettled)
+			moved := newSpace.SettleAll()
+			if moved > 0 {
+				log.Printf("for block %+v new space has %d moved\n\n", block, moved)
+			} else {
+				log.Printf("for block %+v new space has %d moved\n\n", block, moved)
+				result += 1
+			}
+			
+		}
+	}
+
+	return
+}
+
+func (s *Space) SettleAll() (totalMoved int) {
+	for i := uint(1); i <= s.MaxZ; i++ {
+		movedAfterLayer := s.SettleZ(i)
+		totalMoved += movedAfterLayer
+	}
+	return
 }
 
 // settle all blocks in Z, remove Z from UnsettledByZ
-func (s *Space)SettleZ(z uint) {
+func (s *Space) SettleZ(z uint) (totalMoved int) {
 	blocksToSettle := s.UnsettledByZ[int(z)]
 
 	for _, block := range blocksToSettle {
-		s.SettleBlock(block)
+		hasMoved := s.SettleBlock(block)
+		if hasMoved {
+			totalMoved += 1
+		}
 	}
 
 	s.UnsettledByZ[int(z)] = nil
+	return
 }
 
 // for the block:
@@ -59,20 +125,29 @@ func (s *Space)SettleZ(z uint) {
 // set Z for block to Z+1, settled to true
 // add block as highest settled for all the XY
 // add block to MaxSettledOnXY
-func (s *Space)SettleBlock(block *Block) {
+func (s *Space) SettleBlock(block *Block) (hasMoved bool) {
+	initialZ := block.Z
 	underZMax := uint(0)
 	underZBlocks := make([]*Block, 0)
+	// fmt.Printf("\n>> for block %s\n", block)
 	for _, xy := range block.getXY() {
 		underBlock, found := s.MaxSettledOnXY[xy]
 		// if block.NameNum
 		if found {
 			underBlockMaxZ := underBlock.Z + underBlock.ZHeight
+			// action := " 'skipping' "
 			if underBlockMaxZ > underZMax {
 				underZBlocks = []*Block{underBlock}
 				underZMax = underBlockMaxZ
+				// action = " 'overriding' "
 			} else if underBlockMaxZ == underZMax {
 				underZBlocks = append(underZBlocks, underBlock)
+				// action = " 'adding' "
 			}
+			// fmt.Printf("checking under coord %+v. found under %+v. (%s) with %d ; maxZ %d\n directly supporting blocks are %+v\n",
+			// 	xy, underBlock, action, underBlockMaxZ, underZMax, underZBlocks)
+		} else {
+			// fmt.Printf("checking under coord %+v. nothing under\n", xy)
 		}
 		s.MaxSettledOnXY[xy] = block
 	}
@@ -86,4 +161,12 @@ func (s *Space)SettleBlock(block *Block) {
 	block.IsSettled = true
 
 	s.SettledOnZ[block.Z] = append(s.SettledOnZ[block.Z], block)
+	// fmt.Printf(">> after settring block %s. supported by %+v\n\n", block, block.SupportedBy)
+
+	// time.Sleep(500 * time.Millisecond)
+	hasMoved = initialZ != block.Z
+	if hasMoved {
+		log.Printf("block %+v moved from %d to %d", block, initialZ, block.Z)
+	}
+	return 
 }

day22/space_test.go

@@ -85,3 +85,22 @@ func TestSpaceExampleSettleAll(t *testing.T) {
 	// i guess we can start with set of all blocks, then?
 	// run over all, if some block is only supported by some underBlock - remove that underblock
 }
+
+func TestPinholeStart(t *testing.T) {
+	TestPinhole()
+}
+
+func TestExampleSpacePrint(t *testing.T) {
+	filename := "example"
+	blocks := ReadBlockFile(filename)
+	byZ := BlocksByZ(blocks)
+
+	space := NewSpace(byZ)
+
+	// PrintSpace(space, "before-settping.png")
+
+	space.SettleAll()
+
+	PrintSpace(space, "after-settping.png")
+
+}

go.mod

@@ -1,3 +1,12 @@
 module sunshine.industries/aoc2023
 
 go 1.21.4
+
+require github.com/tidwall/pinhole v0.0.0-20210130162507-d8644a7c3d19
+
+require (
+	github.com/fogleman/gg v1.3.0 // indirect
+	github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 // indirect
+	github.com/google/btree v1.1.2 // indirect
+	golang.org/x/image v0.14.0 // indirect
+)

go.sum

@@ -0,0 +1,10 @@
+github.com/fogleman/gg v1.3.0 h1:/7zJX8F6AaYQc57WQCyN9cAIz+4bCJGO9B+dyW29am8=
+github.com/fogleman/gg v1.3.0/go.mod h1:R/bRT+9gY/C5z7JzPU0zXsXHKM4/ayA+zqcVNZzPa1k=
+github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 h1:DACJavvAHhabrF08vX0COfcOBJRhZ8lUbR+ZWIs0Y5g=
+github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0/go.mod h1:E/TSTwGwJL78qG/PmXZO1EjYhfJinVAhrmmHX6Z8B9k=
+github.com/google/btree v1.1.2 h1:xf4v41cLI2Z6FxbKm+8Bu+m8ifhj15JuZ9sa0jZCMUU=
+github.com/google/btree v1.1.2/go.mod h1:qOPhT0dTNdNzV6Z/lhRX0YXUafgPLFUh+gZMl761Gm4=
+github.com/tidwall/pinhole v0.0.0-20210130162507-d8644a7c3d19 h1:PH18rfaiwA/34DAtuREBTrrByvZeLHqhfYh4SG7jYg4=
+github.com/tidwall/pinhole v0.0.0-20210130162507-d8644a7c3d19/go.mod h1:5VfbOBfzaI6Y0XiGSkz7hiXgKtwYaDBI3plwKGsLonM=
+golang.org/x/image v0.14.0 h1:tNgSxAFe3jC4uYqvZdTr84SZoM1KfwdC9SKIFrLjFn4=
+golang.org/x/image v0.14.0/go.mod h1:HUYqC05R2ZcZ3ejNQsIHQDQiwWM4JBqmm6MKANTp4LE=