Faxandu collision box viewer

BizHawk.MultiClient/output/Lua/NES/Faxandu.lua

@@ -0,0 +1,114 @@
+------------------------------
+--Faxandu collision box viewer
+--Author: Pasky
+------------------------------
+
+local HP = true -- toggle to false to turn off hitpoint display on enemies
+
+function findbit(p) 
+	return 2 ^ (p - 1)
+end
+
+function hasbit(x, p) 
+	return x % (p + p) >= p 
+end
+
+local function hex(val)
+	val = string.format("%X",val)
+	return val
+end
+
+memory.usememorydomain("System Bus")
+
+local function player()
+	local x = memory.read_u8(0x9E)
+	local y = memory.read_u8(0xA1) + 0x1F
+	local hp = memory.read_u8(0x431)
+	-- vuln box
+	gui.drawBox(x,y,x+0xB,y+0x1B,0xFF0000FF,0x300000FF)
+	
+	--attack box
+	local xrad = memory.read_u8(0xD2)
+	local yrad = memory.read_u8(0xD3)
+	local atk = memory.read_u8(0xA4)
+	local x2 = memory.read_u8(0xCE)
+	local y2 = memory.read_u8(0xD0) + 0x1F
+	
+	if hasbit(atk,findbit(8)) then
+		gui.drawBox(x2,y2,x2+xrad,y2+yrad)
+	end
+	
+	--Magic
+	local mag = memory.read_u8(0x02B3)
+	if mag ~= 0xFF then
+		local addr = 0x8B73 + mag
+		local magx = memory.read_u8(0x2B6)
+		local magy = memory.read_u8(0x2B8) + 0x1F
+		xrad = memory.read_u8(addr)
+		yrad = memory.read_u8(addr + 5)
+		gui.drawBox(magx,magy,magx+xrad,magy+yrad)
+	end
+end
+
+local function enemies()
+	local base = 0xBA
+	for i = 0,7,1 do
+		local etype = memory.read_u8(0x2CC + i)
+		if etype ~= 0xFF then
+			local x = memory.read_u8(base + i)
+			local y = memory.read_u8(base + 8 + i) + 0x1F
+			local hp = memory.read_u8(0x344 + i)
+			local atk = memory.read_u8(0x2E4 + i)
+			local atk2 = false
+			local facing = memory.read_u8(0x2DC + i)
+			local addr
+			
+			if etype == 0x1F or etype == 0x21 then  -- Check if dwarf or ???
+				if atk == 0x02 then
+					addr = 0x8A71
+					atk2 = true
+				else
+					addr = 0xB200 + (etype * 4) + 0x73
+				end
+			elseif etype == 0x20 then
+				if atk == 0x04 then
+					addr = 0x8A75
+					atk2 = true
+				else
+					addr = 0xB200 + (etype * 4) + 0x73
+				end
+			else
+				addr = 0xB200 + (etype * 4) + 0x73
+			end
+
+			local xoff = memory.read_s8(addr)
+			local yoff = memory.read_s8(addr + 1)
+			local xrad = memory.read_s8(addr + 2)
+			local yrad = memory.read_s8(addr + 3)
+			
+			 if not hasbit(facing,findbit(1)) and atk2 == true then
+				 xoff = xoff * -1
+				 xrad = xrad * -1
+			 end
+			
+			--Attack box
+			gui.drawBox(x,y+yoff,x+xoff+xrad,y+yoff+yrad,0xFFFF0000,0x70FF0000)
+			if HP == true then
+				gui.text(x,y-10,"HP: " .. hp)
+			end
+			--Vuln box
+			if memory.read_u8(etype + 0xB544) == 0 then
+				addr = 0xB407 + (etype * 2)
+				xrad = memory.read_u8(addr)
+				yrad = memory.read_u8(addr + 1)
+				gui.drawBox(x,y,x+xrad,y+yrad,0xFFFFFF00,0x30FFFF00)
+			end
+		end
+	end
+end
+
+while true do
+	player()
+	enemies()
+	emu.frameadvance()
+end