Castlevania Collision box viewer.

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

@@ -0,0 +1,101 @@
+local px = 0x38C
+local py = 0x354
+local pl = 0x45
+
+local ex = 0x38C
+local ey = 0x354
+
+memory.usememorydomain("PRG ROM")
+
+local function whip()
+	local box = {0,0,0} -- xoff/yoff/xrad/yrad
+	local wtype = mainmemory.read_u8(0x70)
+	local pos = bit.band(mainmemory.read_u8(0x434),0x7F)  -- Simons acting positon (jumping/crouching, etc...)
+	box[1] = memory.read_s8(0x1E45D + wtype)  
+	wtype = wtype * 2
+	box[2] = memory.read_s8(0x1E460 + pos) 
+	box[3] = memory.read_u8(0x1E464 + wtype) 
+	box[4] = memory.read_u8(0x1E465 + wtype)
+	
+	if mainmemory.read_u8(0x450) == 1 then  -- Simon is facing left
+		box[1] = box[1] * -1
+		box[3] = box[3] * -1
+	end
+	return box
+end
+
+local function player()
+	local x = mainmemory.read_u8(px)
+	local y = mainmemory.read_u8(py)
+	local box
+	gui.drawBox(x+4,y+mainmemory.read_u8(0x5F),x-4,y-mainmemory.read_u8(0x5F),0xFF0000FF,0x400000FF)
+	
+	if mainmemory.read_u8(0x568) == 0x11 then -- Whip is active 
+		box = whip()
+		gui.drawBox(x+box[1]+box[3],y+box[2]+box[4],x+box[1]-box[3],y+box[2]-box[4],0xFFFFFFFF,0x40FFFFFF)
+	end
+	
+end
+
+local function buildbox(i)
+	local box = {0,0}  -- xrad/yrad
+	local offset = mainmemory.read_u8(0x434 + i)
+		
+	if offset == 0x1D then
+		offset = mainmemory.read_u8(0x7A)
+		if offset == 0 then
+			offset = 0x30 * 2
+		else
+			offset = offset * 2
+		end
+	else
+		offset = offset * 2
+	end
+
+	box = { memory.read_u8(0x1E46A + offset),memory.read_u8(0x1E46B + offset) }
+	
+	return box
+end
+
+local function getcolor(x)
+	local color = {0,0} -- Fill/Outline
+	if x >= 0x28 and x < 0x30 then
+		color = {0x40FFA500,0xFFFFA500}
+	elseif x >= 0x30 and x <= 0x33 then
+		return color
+	elseif x == 0x17 then -- Simon subweapon
+		color = {0x4000FFFF,0xFF00FFFF}
+	else
+		color = {0x40FF0000,0xFFFF0000}
+	end
+	return color
+end
+
+local function objects()
+	local x
+	local y
+	local active
+	local box
+	local etype
+	local c
+	local oob
+	
+	for i = 3,20,1 do
+		oob = mainmemory.read_u8(0x300 + i)
+		if oob == 0 then
+			box = buildbox(i)
+			etype = mainmemory.read_u8(0x434 + i)
+			c = getcolor(etype)
+			x = mainmemory.read_u8(ex + i)
+			y = mainmemory.read_u8(ey + i)
+			gui.drawBox(x+box[1],y+box[2],x-box[1],y-box[2],c[2],c[1])
+		end
+	end
+end
+
+
+while true do
+	player()
+	objects()
+	emu.frameadvance()
+end