Add 3D example

mods/main/script/game.lua

@@ -0,0 +1,215 @@
+package.path = basepath.. "/mods/main/script/?.lua;" ..basepath.. "/mods/main/script/?/main.lua;" ..package.path
+
+function bp(pth)
+	return basepath .. "/mods/main/" ..pth
+end
+
+
+local width = 320
+local height = 240
+local px = -1
+local py = -0.4
+local pz = 0.5
+local prx = 0
+local pry = 0
+
+function main()
+	window = engine_window_create(width,height,"engine")
+	
+	-- Load chars
+	loadchar("invalid","invalid")
+	for ch=0,9,1 do loadchar(tostring(ch),tostring(ch)) end
+	loadchar("space"," ")
+	loadchar("dot",".")
+	loadchar("minus","-")
+	engine_rendertarget_set(engine_window_texture_get(window))
+	
+	-- Clear window
+	engine_color_set(0,0,0,255)
+	engine_rendertarget_fill(0,0,width - 1,height - 1)
+	
+	while true do
+		event = engine_event_get()
+		eventData = {engine_lua_event_get_data(event)}
+		engine_event_free(event)
+		if eventData[1] ~= ENGINE_EVENT_TYPE_NONE then
+			handleEvent(event,eventData)
+		else
+			tick()
+		end
+	end
+end
+
+function logic()
+	engine_color_set(0,0,20,255)
+	engine_rendertarget_fill(0,0,width - 1,height - 1)
+	
+	if pressedKeys[26] then -- w
+		prx = prx + (0.1 * frametime)
+	end
+	
+	if pressedKeys[22] then -- s
+		prx = prx - (0.1 * frametime)
+	end
+	
+	if pressedKeys[7] then -- d
+		pry = pry + (0.1 * frametime)
+	end
+	
+	if pressedKeys[4] then -- a
+		pry = pry - (0.1 * frametime)
+	end
+	
+	local fwdX,fwdY,fwdZ = engine_3d_rotate_position(1,0,0,0,-pry,0)
+	local rgtX,rgtY,rgtZ = engine_3d_rotate_position(0,0,1,0,-pry,0)
+	
+	if pressedKeys[82] then -- up
+		px = px + (fwdX * (0.01 * frametime))
+		py = py + (fwdY * (0.01 * frametime))
+		pz = pz + (fwdZ * (0.01 * frametime))
+	end
+	
+	if pressedKeys[81] then -- down
+		px = px - (fwdX * (0.01 * frametime))
+		py = py - (fwdY * (0.01 * frametime))
+		pz = pz - (fwdZ * (0.01 * frametime))
+	end
+	
+	if pressedKeys[80] then -- left
+		px = px - (rgtX * (0.01 * frametime))
+		py = py - (rgtY * (0.01 * frametime))
+		pz = pz - (rgtZ * (0.01 * frametime))
+	end
+	
+	if pressedKeys[79] then -- right
+		px = px + (rgtX * (0.01 * frametime))
+		py = py + (rgtY * (0.01 * frametime))
+		pz = pz + (rgtZ * (0.01 * frametime))
+	end
+	
+	if pressedKeys[75] then -- pgup
+		py = py - (0.01 * frametime)
+	end
+	
+	if pressedKeys[78] then -- pgdown
+		py = py + (0.01 * frametime)
+	end
+	
+	engine_color_set(255,0,255,255)
+	for i=0,1,0.1 do draw3dpoint(i,0,0) end
+	for i=0,1,0.1 do draw3dpoint(i,1,0) end
+	engine_color_set(64,0,64,255)
+	for i=0,1,0.1 do draw3dpoint(i,0,1) end
+	for i=0,1,0.1 do draw3dpoint(i,1,1) end
+	
+	engine_color_set(255,0,255,255)
+	for i=0,1,0.1 do draw3dpoint(0,i,0) end
+	for i=0,1,0.1 do draw3dpoint(1,i,0) end
+	engine_color_set(64,0,64,255)
+	for i=0,1,0.1 do draw3dpoint(0,i,1) end
+	for i=0,1,0.1 do draw3dpoint(1,i,1) end
+	
+	for i=0,1,0.1 do engine_color_set(255 - math.ceil(192 * i),0,255 - math.ceil(192 * i),255) draw3dpoint(0,0,i) end
+	for i=0,1,0.1 do engine_color_set(255 - math.ceil(192 * i),0,255 - math.ceil(192 * i),255) draw3dpoint(1,0,i) end
+	for i=0,1,0.1 do engine_color_set(255 - math.ceil(192 * i),0,255 - math.ceil(192 * i),255) draw3dpoint(0,1,i) end
+	for i=0,1,0.1 do engine_color_set(255 - math.ceil(192 * i),0,255 - math.ceil(192 * i),255) draw3dpoint(1,1,i) end
+	
+	if framerate ~= nil then drawText(framerate,0,0) end
+	
+	drawText(prettyNumber(px),0,16)
+	drawText(prettyNumber(py),0,24)
+	drawText(prettyNumber(pz),0,32)
+	
+	drawText(prettyNumber(prx),0,48)
+	drawText(prettyNumber(pry),0,56)
+end
+
+lastFrame = engine_time_get()
+frametime = 16
+function tick()
+	logic()
+	
+	engine_window_present(window)
+	trackFps()
+	local curFrame = engine_time_get()
+	frametime = (curFrame - lastFrame)
+	local wait = 16 - frametime
+	if wait > 0 then engine_time_sleep(wait) end
+	lastFrame = engine_time_get()
+end
+
+pressedKeys = {}
+function handleEvent()
+	if eventData[1] == ENGINE_EVENT_TYPE_EXIT then
+		os.exit()
+	end
+	
+	if eventData[1] == ENGINE_EVENT_TYPE_INPUT_KB then
+		if eventData[3] == 1 then
+			print(tostring(eventData[2]).. " pressed")
+			pressedKeys[eventData[2]] = true
+		else
+			print(tostring(eventData[2]).. " released")
+			pressedKeys[eventData[2]] = nil
+		end
+	end
+end
+
+framerate = 0
+local frameSec = 0
+local lastSec = 0
+function trackFps()
+	frameSec = frameSec + 1
+	t = engine_time_get()
+	if t - lastSec >= 1000 then
+		framerate = frameSec
+		lastSec = t
+		frameSec = 0
+	end
+end
+
+function draw3dpoint(x,y,z)
+	x = px - x
+	y = py - y
+	z = pz - z
+	local sx,sy = engine_3d_project(x,y,z,prx,pry,0,90);
+	sx = math.floor((width * 0.5) + (sx * (width * 0.5)))
+	sy = math.floor((height * 0.5) + (sy * (height * 0.5)))
+	
+	-- Clip point within bounds (debugging)
+	if sx < 0 then sx = 0 end
+	if sx > width - 1 then sx = width - 1 end
+	if sy < 0 then sy = 0 end
+	if sy > height - 1 then sy = height - 1 end
+	
+	if sx < 0 or sx > width - 1 then return end
+	if sy < 0 or sy > height - 1 then return end
+	engine_rendertarget_draw_point(sx,sy)
+end
+
+chars = {}
+function loadchar(fi,ch)
+	local tex = engine_texture_create(8,8)
+	engine_rendertarget_set(tex)
+	engine_rendertarget_draw_file(bp("texture/char/" ..fi.. ".rgba"))
+	chars[ch] = tex
+end
+
+function drawText(text,x,y)
+	local len = string.len(text)
+	local index = 1
+	while index <= len do
+		local char = string.sub(text,index,index)
+		if chars[char] == nil then char = "invalid" end
+		engine_rendertarget_draw_texture(chars[char],x + (8 * (index - 1)),y)
+		index = index + 1
+	end
+end
+
+function prettyNumber(nr)
+	local out = string.format("%.2f",nr)
+	if string.sub(out,1,1) ~= "-" then out = " " ..out end
+	return out
+end
+
+main()

mods/main/script/main.lua

@@ -1,63 +1,37 @@
-function main()
-	math.randomseed(os.time())
-	window = engine_window_create(96,64,"Game")
-	texture = engine_texture_create(8,8)
-	engine_rendertarget_set(texture)
-	engine_rendertarget_draw_file(bp("texture/fier.rgba"))
-	engine_rendertarget_set(engine_window_texture_get(window))
-	
-	while true do
-		event = engine_event_get()
-		eventData = {engine_lua_event_get_data(event)}
-		if eventData[1] ~= ENGINE_EVENT_TYPE_NONE then
-			handleEvent(event,eventData)
-		else
-			tick()
-		end
-
-		engine_event_free(event)
-	end
-end
-
-lastFrame = 0
-function tick()
-	engine_rendertarget_draw_texture(texture,math.random(-8,104),math.random(-8,72))
-	engine_window_present(window)
-	trackFps()
-	local curFrame = engine_time_get()
-	local wait = 16 - (curFrame - lastFrame)
-	if wait > 0 then engine_time_sleep(wait) end
-	lastFrame = engine_time_get()
-end
-
-function handleEvent(event,eventData)
-	if eventData[1] == ENGINE_EVENT_TYPE_EXIT then
-		os.exit()
-	end
-	
-	if eventData[1] == ENGINE_EVENT_TYPE_INPUT_KB then
-		for _,val in pairs(eventData) do
-			print(tostring(val))
-		end
-	end
-end
-
-local frameSec = 0
-local lastSec = 0
-function trackFps()
-	frameSec = frameSec + 1
-	t = engine_time_get()
-	if t - lastSec >= 1000 then
-		print("FPS: " ..tostring(frameSec))
-		lastSec = t
-		frameSec = 0
-	end
-end
-
-function bp(pth)
-	return basepath .. "/mods/main/" ..pth
-end
-
 basepath = (debug.getinfo(1, "S").source:sub(2):match("(.*[/\\])") or "./"):sub(1,-2) .. "/../../.." -- Lazy, fix
-package.path = basepath.. "/mods/main/script/?.lua;" ..basepath.. "/mods/main/script/?/main.lua;" ..package.path
+
-main()
+function main()
+	dofile(basepath .. "/mods/main/script/game.lua")
+end
+
+xpcall(main,function(err)
+	local function splitString(str,sep)
+		if sep == nil then
+			sep = "%s"
+		end
+		local t={}
+		for strs in string.gmatch(str, "([^"..sep.."]+)") do
+			table.insert(t, strs)
+		end
+		return t
+	end
+	
+	local function joinString(t,sep)
+		local str = t[1]
+		local index = 2
+		local length = #t
+		while index < length do
+			str = str .. sep .. t[index]
+			index = index + 1
+		end
+		return str
+	end
+	
+	local debugString = splitString(debug.traceback(),"\n")
+	debugString[#debugString] = nil
+	debugString[#debugString] = nil
+	debugString[#debugString] = nil
+	table.remove(debugString,2)
+	print("\n--- ERROR ---\n" .. err .. "\n\n" .. joinString(debugString,"\n"))
+	os.exit(1)
+end)