From 8adc350ac1db7ad639b59060c208b2b2637f5d0a Mon Sep 17 00:00:00 2001
From: shylie <shylie@shylie.info>
Date: Wed, 16 Jul 2025 17:40:58 -0400
Subject: [PATCH] Add water to example, add map scrolling to example

---
 main.lua | 102 +++++++++++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 88 insertions(+), 14 deletions(-)

diff --git a/main.lua b/main.lua
index d3d09d8..2335d72 100644
--- a/main.lua
+++ b/main.lua
@@ -1,52 +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 < 18 then
-		return layer / 26 / 2.5, layer / 52 / 2.5, 0.1
+	if layer < 32 then
+		return layer / 40 / 2.5, layer / 80 / 2.5, 0.1
 	else
-		return 0.05, (layer - 18) / 10 + 0.3, 0.05
+		return 0.05, (layer - 32) / 36 + 0.3, 0.05
 	end
 end
 
 local function mountain_color(layer)
-	if layer < 29 then
-		local value = layer / 32 / 2.5
+	if layer < 58 then
+		local value = layer / 64 / 2.5
 		return value, value, value
 	else
-		local value = (layer - 29) / 10 + 0.7
+		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)
-z._height_scale = 8
 
 local function update_map()
 	z:clear()
-	for i = -64, 64 do
-		for j = -64, 64 do
-			local layers = love.math.simplexNoise(i * 0.02, j * 0.02) * 29 + 3
-			z:put(i * 8, j * 8, BIG_BLOCK, math.floor(layers) + 1, layers < 23 and dirt_color or mountain_color)
+	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, 4 do
+	for _ = 1, 64 do
 		if coroutine.status(co) == "suspended" then
 			coroutine.resume(co)
 		end
 	end
-	angle = math.fmod(angle + dt * 0.8, 2 * math.pi)
+
+	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()
-	z:draw(love.graphics.getWidth() / 2, love.graphics.getHeight() / 2 + 128, angle, 1, 1)
+	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