Немного прибераемся в самом низу render pipeline

src/main/kotlin/ru/dbotthepony/kstarbound/Main.kt

@@ -59,9 +59,9 @@ fun main() {
 		var parse = 0L
 
 		//for (chunkX in 17 .. 18) {
-		for (chunkX in 0 .. 60) {
+		for (chunkX in 14 .. 24) {
 		//	for (chunkY in 21 .. 21) {
-			for (chunkY in 0 .. 60) {
+			for (chunkY in 18 .. 24) {
 				var t = System.currentTimeMillis()
 				val data = db.read(byteArrayOf(1, 0, chunkX.toByte(), 0, chunkY.toByte()))
 				find += System.currentTimeMillis() - t

src/main/kotlin/ru/dbotthepony/kstarbound/client/ClientWorld.kt

@@ -22,17 +22,10 @@ class ClientWorld(
 		)
 	}
 
-	/**
-	 * Отрисовывает этот с обрезкой невидимой геометрии с точки зрения [size] в Starbound Units
-	 *
-	 * Все координаты "местности" сохраняются, поэтому, если отрисовывать слишком далеко от 0, 0
-	 * то геометрия может начать искажаться из-за погрешности плавающей запятой
-	 */
-	fun render(
+	fun addLayers(
 		size: AABB,
-		isScreenspaceRender: Boolean = true
+		layers: LayeredRenderer
 	) {
-		val layers = LayeredRenderer()
 		client.lightRenderer.begin()
 
 		for (chunk in collectPositionAware(size.encasingChunkPosAABB())) {
@@ -42,7 +35,6 @@ class ClientWorld(
 			//client.lightRenderer.addShadowGeometry(renderer)
 		}
 
-		layers.render(client.gl.matrixStack)
 /*
 		for ((lightPosition, color) in listOf(
 			(client.screenToWorld(client.mouseCoordinatesF)) to Color.RED,

src/main/kotlin/ru/dbotthepony/kstarbound/client/StarboundClient.kt

@@ -16,6 +16,7 @@ import ru.dbotthepony.kstarbound.client.gl.ScissorRect
 import ru.dbotthepony.kstarbound.client.input.UserInput
 import ru.dbotthepony.kstarbound.client.render.Camera
 import ru.dbotthepony.kstarbound.client.render.GPULightRenderer
+import ru.dbotthepony.kstarbound.client.render.LayeredRenderer
 import ru.dbotthepony.kstarbound.client.render.TextAlignY
 import ru.dbotthepony.kstarbound.client.render.TileRenderers
 import ru.dbotthepony.kstarbound.util.JVMTimeSource
@@ -40,26 +41,21 @@ class StarboundClient(val starbound: Starbound) : Closeable {
 	val window: Long
 	val camera = Camera(this)
 	val input = UserInput()
+	val gl: GLStateTracker
 
 	var gameTerminated = false
 		private set
 
-	var viewportWidth = 800
-		private set
-
-	var viewportHeight = 600
-		private set
-
 	/**
 	 * Матрица преобразования экранных координат (в пикселях) в нормализованные координаты
 	 */
-	var viewportMatrixScreen = updateViewportMatrixScreen()
+	var viewportMatrixScreen: Matrix4f
 		private set
 
 	/**
 	 * Матрица преобразования мировых координат в нормализованные координаты
 	 */
-	var viewportMatrixWorld = updateViewportMatrixWorld()
+	var viewportMatrixWorld: Matrix4f
 		private set
 
 	private val startupTextList = ArrayList<String>()
@@ -172,29 +168,29 @@ class StarboundClient(val starbound: Starbound) : Closeable {
 		GLFW.glfwWindowHint(GLFW.GLFW_CONTEXT_VERSION_MINOR, 6)
 		GLFW.glfwWindowHint(GLFW.GLFW_OPENGL_PROFILE, GLFW.GLFW_OPENGL_CORE_PROFILE)
 
-		window = GLFW.glfwCreateWindow(viewportWidth, viewportHeight, "KStarbound", MemoryUtil.NULL, MemoryUtil.NULL)
+		window = GLFW.glfwCreateWindow(800, 600, "KStarbound", MemoryUtil.NULL, MemoryUtil.NULL)
 		require(window != MemoryUtil.NULL) { "Unable to create GLFW window" }
 		startupTextList.add("Created GLFW window")
 
 		input.installCallback(window)
 
+		GLFW.glfwMakeContextCurrent(window)
+		gl = GLStateTracker(starbound)
+
 		GLFW.glfwSetFramebufferSizeCallback(window) { _, w, h ->
 			if (w == 0 || h == 0) {
 				isRenderingGame = false
-				return@glfwSetFramebufferSizeCallback
-			}
+			} else {
+				isRenderingGame = true
+				viewportMatrixScreen = updateViewportMatrixScreen()
+				viewportMatrixWorld = updateViewportMatrixWorld()
+				gl.setViewport(0, 0, w, h)
 
-			isRenderingGame = true
-			viewportWidth = w
-			viewportHeight = h
-			viewportMatrixScreen = updateViewportMatrixScreen()
-			viewportMatrixWorld = updateViewportMatrixWorld()
-			glViewport(0, 0, w, h)
+				lightRenderer.resizeFramebuffer(w, h)
 
-			lightRenderer.resizeFramebuffer(viewportWidth, viewportHeight)
-
-			for (callback in onViewportChanged) {
-				callback.invoke(w, h)
+				for (callback in onViewportChanged) {
+					callback.invoke(w, h)
+				}
 			}
 		}
 
@@ -213,12 +209,14 @@ class StarboundClient(val starbound: Starbound) : Closeable {
 				(vidmode.width() - pWidth[0]) / 2,
 				(vidmode.height() - pHeight[0]) / 2
 			)
+
+			gl.setViewport(0, 0, pWidth[0], pHeight[0])
+			viewportMatrixScreen = updateViewportMatrixScreen()
+			viewportMatrixWorld = updateViewportMatrixWorld()
 		} finally {
 			stack.close()
 		}
 
-		GLFW.glfwMakeContextCurrent(window)
-
 		// vsync
 		GLFW.glfwSwapInterval(0)
 
@@ -226,7 +224,9 @@ class StarboundClient(val starbound: Starbound) : Closeable {
 		putDebugLog("Initialized GLFW window")
 	}
 
-	val gl = GLStateTracker(starbound)
+	val viewportWidth by gl::viewportWidth
+	val viewportHeight by gl::viewportHeight
+
 	val tileRenderers = TileRenderers(this)
 	val lightRenderer = GPULightRenderer(gl)
 
@@ -236,8 +236,6 @@ class StarboundClient(val starbound: Starbound) : Closeable {
 
 	var world: ClientWorld? = ClientWorld(this, 0L, 0)
 
-	fun ensureSameThread() = gl.ensureSameThread()
-
 	init {
 		putDebugLog("Initialized OpenGL context")
 		gl.clearColor = Color.SLATE_GREY
@@ -269,87 +267,34 @@ class StarboundClient(val starbound: Starbound) : Closeable {
 
 	val settings = ClientSettings()
 
+	private val onDrawGUI = ArrayList<() -> Unit>()
+	private val onPreDrawWorld = ArrayList<(LayeredRenderer) -> Unit>()
+	private val onPostDrawWorld = ArrayList<() -> Unit>()
+	private val onPostDrawWorldOnce = ArrayList<(LayeredRenderer) -> Unit>()
 	private val onViewportChanged = ArrayList<(width: Int, height: Int) -> Unit>()
 
 	fun onViewportChanged(callback: (width: Int, height: Int) -> Unit) {
 		onViewportChanged.add(callback)
 	}
 
-	private val onDrawGUI = ArrayList<() -> Unit>()
-
 	fun onDrawGUI(lambda: () -> Unit) {
 		onDrawGUI.add(lambda)
 	}
 
-	private val onPreDrawWorld = ArrayList<() -> Unit>()
-
-	fun onPreDrawWorld(lambda: () -> Unit) {
+	fun onPreDrawWorld(lambda: (LayeredRenderer) -> Unit) {
 		onPreDrawWorld.add(lambda)
 	}
 
-	private val onPostDrawWorld = ArrayList<() -> Unit>()
-
 	fun onPostDrawWorld(lambda: () -> Unit) {
 		onPostDrawWorld.add(lambda)
 	}
 
-	private val onPostDrawWorldOnce = ArrayList<() -> Unit>()
-
-	fun onPostDrawWorldOnce(lambda: () -> Unit) {
+	fun onPostDrawWorldOnce(lambda: (LayeredRenderer) -> Unit) {
 		onPostDrawWorldOnce.add(lambda)
 	}
 
-	private val scissorStack = LinkedList<ScissorRect>()
-
-	fun pushScissorRect(x: Float, y: Float, width: Float, height: Float) {
-		return pushScissorRect(x.roundToInt(), y.roundToInt(), width.roundToInt(), height.roundToInt())
-	}
-
-	@Suppress("NAME_SHADOWING")
-	fun pushScissorRect(x: Int, y: Int, width: Int, height: Int) {
-		var x = x
-		var y = y
-		var width = width
-		var height = height
-
-		val peek = scissorStack.lastOrNull()
-
-		if (peek != null) {
-			x = x.coerceAtLeast(peek.x)
-			y = y.coerceAtLeast(peek.y)
-			width = width.coerceAtMost(peek.width)
-			height = height.coerceAtMost(peek.height)
-
-			if (peek.x == x && peek.y == y && peek.width == width && peek.height == height) {
-				scissorStack.add(peek)
-				return
-			}
-		}
-
-		val rect = ScissorRect(x, y, width, height)
-		scissorStack.add(rect)
-		gl.scissorRect = rect
-		gl.scissor = true
-	}
-
-	fun popScissorRect() {
-		scissorStack.removeLast()
-
-		val peek = scissorStack.lastOrNull()
-
-		if (peek == null) {
-			gl.scissor = false
-			return
-		}
-
-		val y = viewportHeight - peek.y - peek.height
-		gl.scissorRect = ScissorRect(peek.x, y, peek.width, peek.height)
-	}
-
-	val currentScissorRect get() = scissorStack.lastOrNull()
-
 	fun renderFrame(): Boolean {
-		ensureSameThread()
+		gl.ensureSameThread()
 
 		if (GLFW.glfwWindowShouldClose(window)) {
 			close()
@@ -364,40 +309,48 @@ class StarboundClient(val starbound: Starbound) : Closeable {
 		}
 
 		val measure = JVMTimeSource.INSTANCE.seconds
+		val world = world
 
-		if (frameRenderTime != 0.0 && starbound.initialized)
-			world?.think(frameRenderTime)
+		if (world != null) {
+			val layers = LayeredRenderer()
 
-		gl.clearColor = Color.SLATE_GREY
-		glClear(GL_COLOR_BUFFER_BIT or GL_DEPTH_BUFFER_BIT)
-		gl.matrixStack.clear(viewportMatrixWorld.toMutableMatrix4f())
+			if (frameRenderTime != 0.0 && starbound.initialized)
+				world.think(frameRenderTime)
 
-		gl.matrixStack.push()
-			.translateWithMultiplication(viewportWidth / 2f, viewportHeight / 2f, 2f) // центр экрана + координаты отрисовки мира
-			.scale(x = settings.zoom * PIXELS_IN_STARBOUND_UNITf, y = settings.zoom * PIXELS_IN_STARBOUND_UNITf) // масштабируем до нужного размера
-			.translateWithMultiplication(-camera.pos.x, -camera.pos.y) // перемещаем вид к камере
+			gl.clearColor = Color.SLATE_GREY
+			glClear(GL_COLOR_BUFFER_BIT or GL_DEPTH_BUFFER_BIT)
+			gl.matrixStack.clear(viewportMatrixWorld.toMutableMatrix4f())
 
-		for (lambda in onPreDrawWorld) {
-			lambda.invoke()
+			gl.matrixStack.push()
+				.translateWithMultiplication(viewportWidth / 2f, viewportHeight / 2f, 2f) // центр экрана + координаты отрисовки мира
+				.scale(x = settings.zoom * PIXELS_IN_STARBOUND_UNITf, y = settings.zoom * PIXELS_IN_STARBOUND_UNITf) // масштабируем до нужного размера
+				.translateWithMultiplication(-camera.pos.x, -camera.pos.y) // перемещаем вид к камере
+
+			for (lambda in onPreDrawWorld) {
+				lambda.invoke(layers)
+			}
+
+			for (i in onPostDrawWorldOnce.size - 1 downTo 0) {
+				onPostDrawWorldOnce[i].invoke(layers)
+				onPostDrawWorldOnce.removeAt(i)
+			}
+
+			world.addLayers(
+				layers = layers,
+				size = AABB.rectangle(
+					camera.pos.toDoubleVector(),
+					viewportWidth / settings.zoom / PIXELS_IN_STARBOUND_UNIT,
+					viewportHeight / settings.zoom / PIXELS_IN_STARBOUND_UNIT))
+
+			layers.render(gl.matrixStack)
+
+			for (lambda in onPostDrawWorld) {
+				lambda.invoke()
+			}
+
+			gl.matrixStack.pop()
 		}
 
-		for (i in onPostDrawWorldOnce.size - 1 downTo 0) {
-			onPostDrawWorldOnce[i].invoke()
-			onPostDrawWorldOnce.removeAt(i)
-		}
-
-		world?.render(
-			AABB.rectangle(
-				camera.pos.toDoubleVector(),
-				viewportWidth / settings.zoom / PIXELS_IN_STARBOUND_UNIT,
-				viewportHeight / settings.zoom / PIXELS_IN_STARBOUND_UNIT))
-
-		for (lambda in onPostDrawWorld) {
-			lambda.invoke()
-		}
-
-		gl.matrixStack.pop()
-
 		gl.matrixStack.clear(viewportMatrixScreen.toMutableMatrix4f())
 
 		val thisTime = System.currentTimeMillis()

src/main/kotlin/ru/dbotthepony/kstarbound/client/gl/GLStateTracker.kt

@@ -24,10 +24,12 @@ import ru.dbotthepony.kvector.vector.Color
 import java.io.File
 import java.io.FileNotFoundException
 import java.lang.ref.Cleaner
+import java.util.*
 import java.util.concurrent.ThreadFactory
 import java.util.concurrent.atomic.AtomicLong
 import kotlin.collections.ArrayList
 import kotlin.collections.HashMap
+import kotlin.math.roundToInt
 import kotlin.properties.ReadWriteProperty
 import kotlin.reflect.KProperty
 
@@ -150,6 +152,7 @@ class GLStateTracker(val locator: ISBFileLocator) {
 	val thread: Thread = Thread.currentThread()
 	val box2dRenderer = Box2DRenderer(this)
 
+	private val scissorStack = LinkedList<ScissorRect>()
 	private val cleanerBacklog = ArrayList<() -> Unit>()
 
 	@Volatile
@@ -347,6 +350,75 @@ class GLStateTracker(val locator: ISBFileLocator) {
 		checkForGLError()
 	}
 
+	var viewportX: Int = 0
+		private set
+	var viewportY: Int = 0
+		private set
+	var viewportWidth: Int = 0
+		private set
+	var viewportHeight: Int = 0
+		private set
+
+	fun setViewport(x: Int, y: Int, width: Int, height: Int) {
+		ensureSameThread()
+
+		if (viewportX != x || viewportY != y || viewportWidth != width || viewportHeight != height) {
+			glViewport(x, y, width, height)
+			checkForGLError("Setting viewport")
+			viewportX = x
+			viewportY = y
+			viewportWidth = width
+			viewportHeight = height
+		}
+	}
+
+	fun pushScissorRect(x: Float, y: Float, width: Float, height: Float) {
+		return pushScissorRect(x.roundToInt(), y.roundToInt(), width.roundToInt(), height.roundToInt())
+	}
+
+	@Suppress("NAME_SHADOWING")
+	fun pushScissorRect(x: Int, y: Int, width: Int, height: Int) {
+		var x = x
+		var y = y
+		var width = width
+		var height = height
+
+		val peek = scissorStack.lastOrNull()
+
+		if (peek != null) {
+			x = x.coerceAtLeast(peek.x)
+			y = y.coerceAtLeast(peek.y)
+			width = width.coerceAtMost(peek.width)
+			height = height.coerceAtMost(peek.height)
+
+			if (peek.x == x && peek.y == y && peek.width == width && peek.height == height) {
+				scissorStack.add(peek)
+				return
+			}
+		}
+
+		val rect = ScissorRect(x, y, width, height)
+		scissorStack.add(rect)
+		scissorRect = rect
+		scissor = true
+	}
+
+	fun popScissorRect() {
+		scissorStack.removeLast()
+
+		val peek = scissorStack.lastOrNull()
+
+		if (peek == null) {
+			scissor = false
+			return
+		}
+
+		val y = viewportHeight - peek.y - peek.height
+		scissorRect = ScissorRect(peek.x, y, peek.width, peek.height)
+	}
+
+	val currentScissorRect get() = scissorStack.lastOrNull()
+
 	fun ensureSameThread() {
 		if (thread !== Thread.currentThread()) {
 			throw IllegalAccessException("Trying to access $this outside of $thread!")