From 4f6633db18e2213a151782d995486491c8db3ff7 Mon Sep 17 00:00:00 2001
From: Treeki <treeki@gmail.com>
Date: Mon, 25 Jul 2011 03:16:21 +0200
Subject: Random tiles added. Untested.

---
 src/randtiles.cpp | 158 ++++++++++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 141 insertions(+), 17 deletions(-)

(limited to 'src/randtiles.cpp')

diff --git a/src/randtiles.cpp b/src/randtiles.cpp
index c7388dd..4af3bf7 100644
--- a/src/randtiles.cpp
+++ b/src/randtiles.cpp
@@ -1,22 +1,146 @@
-#include "randtiles.h"
-
-u32 djb2(u8 *str) {
-	u32 hash = 5381;
-	int c;
-	
-	while (c = *str++)
-		hash = ((hash << 5) + hash) + c;
-	
-	return hash;
-}
+#include <game.h>
+
+class RandomTileData {
+public:
+	enum Type {
+		CHECK_NONE = 0,
+		CHECK_HORZ = 1,
+		CHECK_VERT = 2,
+		CHECK_BOTH = 3
+	};
+
+	class Entry {
+	public:
+		u8 lowerBound, upperBound;
+		u8 count, type;
+		u32 tileNumOffset;
+
+		u8 *getTileNums() {
+			return ((u8*)this) + tileNumOffset;
+		}
+	};
+
+	class Section {
+	public:
+		u32 nameOffset;
+		u32 entryCount;
+		Entry entries[1]; // variable size
+
+		const char *getName() {
+			return ((char*)this) + nameOffset;
+		}
+	};
+
+	u32 magic;
+	u32 sectionCount;
+	u32 offsets[1]; // variable size
+
+	Section *getSection(int id) {
+		return (Section*)(((char*)this) + offsets[id]);
+	}
+
+	Section *getSection(const char *name);
+
+	static RandomTileData *instance;
+};
 
-RandTiles_Section *RandTiles_Search(void *file, u32 nameHash) {
-	for (int i = 0; i < RandTiles_GetSectionCount(file); i++) {
-		RandTiles_Section *sect = RandTiles_GetSection(file, i);
-		
-		if (sect->nameHash == nameHash)
+class RTilemapClass : public TilemapClass {
+public:
+	// NEWER ADDITIONS
+	RandomTileData::Section *sections[4];
+};
+
+RandomTileData::Section *RandomTileData::getSection(const char *name) {
+	for (int i = 0; i < sectionCount; i++) {
+		RandomTileData::Section *sect = getSection(i);
+
+		if (strcmp(name, sect->getName()) == 0) {
 			return sect;
+		}
 	}
-	
+
 	return 0;
 }
+
+
+// Real tile handling code
+
+RandomTileData *RandomTileData::instance = 0;
+
+dDvdLoader_c RandTileLoader;
+
+extern "C" bool RandTileLoadHook() {
+	OSReport("Trying to load...");
+	void *buf = RandTileLoader.load("/NewerRes/RandTiles.bin");
+	if (buf == 0) {
+		OSReport("Failed.\n");
+		return false;
+	} else {
+		OSReport("Successfully loaded RandTiles.bin.\n");
+		RandomTileData::instance = (RandomTileData*)buf;
+		return true;
+	}
+}
+
+
+extern "C" void IdentifyTilesets(RTilemapClass *self) {
+	self->_C0C = 0xFFFFFFFF;
+
+	for (int i = 0; i < 4; i++) {
+		const char *tilesetName = BGDatClass::instance->getTilesetName(self->areaID, i);
+
+		self->sections[i] = RandomTileData::instance->getSection(tilesetName);
+	}
+}
+
+extern "C" void TryAndRandomise(RTilemapClass *self, BGRender *bgr) {
+	int fullTile = bgr->tileToPlace & 0x3FF;
+	int tile = fullTile & 0xFF;
+	int tileset = fullTile >> 8;
+
+	RandomTileData::Section *rtSect = self->sections[tileset];
+	if (rtSect == 0)
+		return;
+
+	for (int i = 0; i < rtSect->entryCount; i++) {
+		RandomTileData::Entry *entry = &rtSect->entries[i];
+
+		if (tile >= entry->lowerBound && tile <= entry->upperBound) {
+			// Found it!!
+			// Try to make one until we meet the conditions
+			u8 *tileNums = entry->getTileNums();
+			u8 chosen = 0xFF;
+
+			u16 *top = 0, *left = 0, *right = 0, *bottom = 0;
+			if (entry->type == RandomTileData::CHECK_HORZ || entry->type == RandomTileData::CHECK_BOTH) {
+				left = self->getPointerToTile(bgr->curX - 1, bgr->curY);
+				right = self->getPointerToTile(bgr->curX + 1, bgr->curY);
+			}
+
+			if (entry->type == RandomTileData::CHECK_VERT || entry->type == RandomTileData::CHECK_BOTH) {
+				top = self->getPointerToTile(bgr->curX, bgr->curY - 1);
+				bottom = self->getPointerToTile(bgr->curX, bgr->curY + 1);
+			}
+
+			while (true) {
+				chosen = tileNums[MakeRandomNumber(entry->count)];
+
+				if (top != 0 && *top == chosen)
+					continue;
+				if (bottom != 0 && *bottom == chosen)
+					continue;
+				if (left != 0 && *left == chosen)
+					continue;
+				if (right != 0 && *right == chosen)
+					continue;
+				break;
+			}
+
+			bgr->tileToPlace = chosen;
+
+			return;
+		}
+	}
+}
+
+
-- 
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