Initial commit

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "zprite"]
+	path = zprite
+	url = https://git.shylie.info/shylie/zprite.git

LICENSE

@@ -0,0 +1,20 @@
+Copyright (c) 2025 shylie
+
+This software is provided ‘as-is’, without any express or implied
+warranty. In no event will the authors be held liable for any damages
+arising from the use of this software.
+
+Permission is granted to anyone to use this software for any purpose,
+including commercial applications, and to alter it and redistribute it
+freely, subject to the following restrictions:
+
+1. The origin of this software must not be misrepresented; you must not
+claim that you wrote the original software. If you use this software
+in a product, an acknowledgment in the product documentation would be
+appreciated but is not required.
+
+2. Altered source versions must be plainly marked as such, and must not be
+misrepresented as being the original software.
+
+3. This notice may not be removed or altered from any source
+distribution.

main.lua

@@ -0,0 +1,126 @@
+local tex = love.graphics.newImage("circle.png")
+tex:setFilter("nearest", "nearest")
+
+local function water_color(layer)
+	local value = layer / 24
+	return value / 4, value / 2, value
+end
+
+local function dirt_color(layer)
+	if layer < 32 then
+		return layer / 40 / 2.5, layer / 80 / 2.5, 0.1
+	else
+		return 0.05, (layer - 32) / 36 + 0.3, 0.05
+	end
+end
+
+local function mountain_color(layer)
+	if layer < 58 then
+		local value = layer / 64 / 2.5
+		return value, value, value
+	else
+		local value = (layer - 58) / 20 + 0.7
+		return value, value, value
+	end
+end
+
+local function pick_colorfn(maxlayer)
+	if maxlayer < 16 then
+		return water_color
+	elseif maxlayer < 46 then
+		return dirt_color
+	else
+		return mountain_color
+	end
+end
+
+local function ease(n)
+	return 5 ^ (3.1 * (n ^ 0.3) - 3) + 1 - 1.1 ^ n
+end
+
+local BIG_BLOCK = love.graphics.newQuad(0, 0, 8, 8, tex)
+
+local z = require("zprite").zchunk.new(tex, 128, 32)
+
+local function update_map()
+	z:clear()
+	for i = -160, 160 do
+		for j = -160, 160 do
+			local noise_value = love.math.simplexNoise(i * 0.008, j * 0.008)
+			local layers = ease(noise_value) * 64
+			z:put(i * 8, j * 8, BIG_BLOCK, math.floor(layers) + 1, pick_colorfn(layers))
+			coroutine.yield()
+		end
+	end
+end
+local co = coroutine.create(update_map)
+
+local x = 0
+local y = 0
+local angle = 0
+local scale = 1
+
+function love.update(dt)
+	for _ = 1, 64 do
+		if coroutine.status(co) == "suspended" then
+			coroutine.resume(co)
+		end
+	end
+
+	if love.keyboard.isDown("d") then
+		local dx = 256 * math.cos(-angle)
+		local dy = 256 * math.sin(-angle)
+		x = x - dx * dt
+		y = y - dy * dt
+	end
+	if love.keyboard.isDown("a") then
+		local dx = 256 * math.cos(-angle)
+		local dy = 256 * math.sin(-angle)
+		x = x + dx * dt
+		y = y + dy * dt
+	end
+	if love.keyboard.isDown("s") then
+		local dx = 256 * math.cos(-angle + math.pi / 2)
+		local dy = 256 * math.sin(-angle + math.pi / 2)
+		x = x - dx * dt
+		y = y - dy * dt
+	end
+	if love.keyboard.isDown("w") then
+		local dx = 256 * math.cos(-angle + math.pi / 2)
+		local dy = 256 * math.sin(-angle + math.pi / 2)
+		x = x + dx * dt
+		y = y + dy * dt
+	end
+	if love.keyboard.isDown("q") then
+		angle = angle + dt
+	end
+	if love.keyboard.isDown("e") then
+		angle = angle - dt
+	end
+	if love.keyboard.isDown("f") then
+		scale = scale - dt * 5
+		if scale < 0.2 then
+			scale = 0.2
+		end
+	end
+	if love.keyboard.isDown("r") then
+		scale = scale + dt * 5
+		if scale > 5 then
+			scale = 5
+		end
+	end
+end
+
+local t = love.math.newTransform()
+
+function love.draw()
+	for _, chunk in pairs(z._chunks) do
+		chunk.z._height_scale = 12 * scale
+	end
+	t:reset()
+	t:translate(love.graphics.getWidth() / 2, love.graphics.getHeight() / 2)
+	t:scale(scale, scale)
+	t:rotate(angle)
+	t:translate(x, y)
+	z:draw(t)
+end

zprite

@@ -0,0 +1 @@
+Subproject commit 6eba579c969700428afdfe4d67c670d5400405ae