From 34544ee7bd254f6992d54976a2b66747f7f2a012 Mon Sep 17 00:00:00 2001
From: Nick Thomas <me@ur.gs>
Date: Wed, 20 May 2020 01:47:04 +0100
Subject: [PATCH] Get SaW maps displaying

---
 internal/maps/maps.go         | 99 +++++++++++++++++++++++------------
 internal/palettes/palettes.go |  2 +-
 2 files changed, 66 insertions(+), 35 deletions(-)

diff --git a/internal/maps/maps.go b/internal/maps/maps.go
index c72a81f..a59feb4 100644
--- a/internal/maps/maps.go
+++ b/internal/maps/maps.go
@@ -15,8 +15,8 @@ import (
 )
 
 var (
-	expectedMagic         = []byte("\x08\x00WHMAP\x00")
-	expectedSetNameOffset = uint32(0x34)
+	expectedMagic         = []byte("\x15\x00AMB_MAP\x00")
+	expectedSetNameOffset = uint32(0x10)
 	notImplemented        = fmt.Errorf("Not implemented")
 )
 
@@ -25,35 +25,25 @@ const (
 	MaxLength = 100 // Y coordinate
 	MaxWidth  = 130 // X coordinate
 
-	CellSize = 16 // seems to be
+	CellSize = 13 // seems to be
 
-	cellDataOffset = 0x110 // definitely
+	cellDataOffset = 0xc0
 	cellCount      = MaxHeight * MaxLength * MaxWidth
 )
 
 type Header struct {
-	IsCampaignMap uint32 // Tentatively: 0 = no, 1 = yes
-	MinWidth      uint32
-	MinLength     uint32
-	MaxWidth      uint32
-	MaxLength     uint32
-	Unknown1      uint32
-	Unknown2      uint32
-	Unknown3      uint32
-	Unknown4      uint32
-	Magic         [8]byte // "\x08\x00WHMAP\x00"
-	Unknown5      uint32
-	Unknown6      uint32
-	SetName       [8]byte // Links to a filename in `/Sets/*.set`
+	Magic   [10]byte // "\x15\x00AMB_MAP\x00"
+	SetName [8]byte  // Links to a filename in `/Sets/*.set`
 	// Need to investigate the rest of the header too
+	IsCampaignMap byte
 }
 
 func (h Header) Width() int {
-	return int(h.MaxWidth - h.MinWidth)
+	return MaxWidth
 }
 
 func (h Header) Length() int {
-	return int(h.MaxLength - h.MinLength)
+	return MaxLength
 }
 
 func (h Header) Height() int {
@@ -80,7 +70,7 @@ type ObjRef struct {
 
 // The index into a set palette to retrieve the object
 func (o ObjRef) Index() int {
-	return int(o.AreaByte)
+	return int(o.AreaByte & 0x7f)
 }
 
 func (o ObjRef) Sprite() int {
@@ -91,12 +81,13 @@ func (o ObjRef) Sprite() int {
 // The top bit seems to say whether we should draw or not.
 func (o ObjRef) IsActive() bool {
 	return (o.SpriteAndFlagByte & 0x80) == 0x80
-}
-
+} // PARIS is 78 x 60 x 7
+//          4E   3C   7
+/*
 type Cell struct {
 	DoorAndCanisterRelated    byte
-	DoorLockAndReactorRelated byte
-	Unknown2                  byte
+//	DoorLockAndReactorRelated byte
+//	Unknown2                  byte
 	Surface                   ObjRef
 	Left                      ObjRef
 	Right                     ObjRef
@@ -105,15 +96,45 @@ type Cell struct {
 	Unknown12                 byte
 	Unknown13                 byte
 	Unknown14                 byte
-	SquadRelated              byte
+//	SquadRelated              byte
+}*/
+
+type Cell struct {
+	Unknown  byte
+	Surface  ObjRef
+	Left     ObjRef
+	Right    ObjRef
+	Center   ObjRef
+	Unknown2 [4]byte
+
+	/*
+	   	DoorAndCanisterRelated    byte
+	   //	DoorLockAndReactorRelated byte
+	   //	Unknown2                  byte
+	   	Surface                   ObjRef
+	   	Left                      ObjRef
+	   	Right                     ObjRef
+	   	Center                    ObjRef
+	   	Unknown11                 byte
+	   	Unknown12                 byte
+	   	Unknown13                 byte
+	   	Unknown14                 byte
+	   	SquadRelated              byte*/
 }
 
+/*
+func (c *Cell) At(n int) byte {
+	return c.Unknown[n]
+}
+*/
+/*
 func (c *Cell) At(n int) byte {
 	switch n {
 	case 0:
 		return c.DoorAndCanisterRelated
 	case 1:
 		return c.DoorLockAndReactorRelated
+
 	case 2:
 		return c.Unknown2
 	case 3:
@@ -136,29 +157,39 @@ func (c *Cell) At(n int) byte {
 		return c.Unknown11
 	case 12:
 		return c.Unknown12
+
 	case 13:
 		return c.Unknown13
 	case 14:
 		return c.Unknown14
 	case 15:
 		return c.SquadRelated
+
 	}
 
 	return 0
 }
-
+*/
 // Cells is always a fixed size; use At to get a cell according to x,y,z
 type Cells []Cell
 
+// 6 Possibilities for being laid out in memory. Most likely:
+// XXYYZZ
+// OR
+// XYZXYZ
+
 func (c Cells) At(x, y, z int) Cell {
-	return c[(z*MaxLength*MaxWidth)+(y*MaxWidth)+x]
+	//	log.Printf("At (%v,%v,%v)=%v", x, y, z, x*y*z)
+	return c[(z*MaxLength*MaxWidth)+
+		(y*MaxWidth)+
+		x]
 }
 
 func (h Header) Check() []error {
 	var out []error
-	if h.IsCampaignMap > 1 {
-		out = append(out, fmt.Errorf("Expected 0 or 1 for IsCampaignMap, got %v", h.IsCampaignMap))
-	}
+	//	if h.IsCampaignMap > 1 {
+	//		out = append(out, fmt.Errorf("Expected 0 or 1 for IsCampaignMap, got %v", h.IsCampaignMap))
+	//	}
 
 	if bytes.Compare(expectedMagic, h.Magic[:]) != 0 {
 		out = append(out, fmt.Errorf("Unexpected magic value: %v", h.Magic))
@@ -176,10 +207,10 @@ type GameMap struct {
 
 func (m *GameMap) Rect() image.Rectangle {
 	return image.Rect(
-		int(m.Header.MinWidth),
-		int(m.Header.MinLength),
-		int(m.Header.MaxWidth),
-		int(m.Header.MaxLength),
+		int(0),
+		int(0),
+		int(m.Width()-1),
+		int(m.Length()-1),
 	)
 }
 
diff --git a/internal/palettes/palettes.go b/internal/palettes/palettes.go
index ddc6b2c..0d75755 100644
--- a/internal/palettes/palettes.go
+++ b/internal/palettes/palettes.go
@@ -6,7 +6,7 @@ import (
 )
 
 // Override this to change the palette globally
-const DefaultPaletteName = "ChaosGate"
+const DefaultPaletteName = "SoldiersAtWar"
 
 var (
 	Transparent = color.RGBA{R: 0, G: 0, B: 0, A: 0}