wip improve shaders, replace all rendering callbacks with events

src/main/java/de/bixilon/minosoft/gui/input/camera/Camera.kt

@@ -20,13 +20,14 @@ import de.bixilon.minosoft.data.entities.entities.player.PlayerEntity
 import de.bixilon.minosoft.data.mappings.biomes.Biome
 import de.bixilon.minosoft.gui.rendering.RenderConstants
 import de.bixilon.minosoft.gui.rendering.RenderWindow
-import de.bixilon.minosoft.gui.rendering.shader.Shader
+import de.bixilon.minosoft.gui.rendering.modding.events.FrustumChangeEvent
+import de.bixilon.minosoft.gui.rendering.modding.events.ScreenResizeEvent
 import de.bixilon.minosoft.gui.rendering.util.VecUtil
 import de.bixilon.minosoft.gui.rendering.util.VecUtil.blockPosition
 import de.bixilon.minosoft.gui.rendering.util.VecUtil.chunkPosition
 import de.bixilon.minosoft.gui.rendering.util.VecUtil.inChunkSectionPosition
 import de.bixilon.minosoft.gui.rendering.util.VecUtil.sectionHeight
-import de.bixilon.minosoft.gui.rendering.util.abstractions.ScreenResizeCallback
+import de.bixilon.minosoft.modding.event.CallbackEventInvoker
 import de.bixilon.minosoft.protocol.network.connection.PlayConnection
 import de.bixilon.minosoft.protocol.packets.c2s.play.PositionAndRotationC2SP
 import de.bixilon.minosoft.protocol.packets.c2s.play.PositionC2SP
@@ -46,7 +47,7 @@ class Camera(
     val connection: PlayConnection,
     var fov: Float,
     val renderWindow: RenderWindow,
-) : ScreenResizeCallback {
+) {
     private var mouseSensitivity = Minosoft.getConfig().config.game.camera.moseSensitivity
     private val walkingSpeed get() = connection.player.baseAbilities.walkingSpeed * ProtocolDefinition.TICKS_PER_SECOND * 2
     private val flyingSpeed get() = connection.player.baseAbilities.flyingSpeed * ProtocolDefinition.TICKS_PER_SECOND * 2
@@ -80,9 +81,6 @@ class Camera(
 
     val frustum: Frustum = Frustum(this)
 
-    private val shaders: MutableSet<Shader> = mutableSetOf()
-    private val frustumChangeCallbacks: MutableSet<FrustumChangeCallback> = mutableSetOf()
-
 
     var viewMatrix = calculateViewMatrix()
         private set
@@ -135,10 +133,9 @@ class Camera(
             KeyBindingsNames.MOVE_JUMP,
         )
 
+        connection.registerEvent(CallbackEventInvoker.of<ScreenResizeEvent> { recalculateViewProjectionMatrix() })
         frustum.recalculate()
-        for (frustumChangeCallback in frustumChangeCallbacks) {
+        connection.fireEvent(FrustumChangeEvent(renderWindow, frustum))
-            frustumChangeCallback.onFrustumChange()
-        }
     }
 
     fun handleInput(deltaTime: Double) {
@@ -211,26 +208,16 @@ class Camera(
         }
     }
 
-    fun addShaders(vararg shaders: Shader) {
-        this.shaders.addAll(shaders)
-    }
-
-    fun addFrustumChangeCallback(vararg shaders: FrustumChangeCallback) {
-        this.frustumChangeCallbacks.addAll(shaders)
-    }
-
-    override fun onScreenResize(screenDimensions: Vec2i) {
-        recalculateViewProjectionMatrix()
-    }
-
     private fun recalculateViewProjectionMatrix() {
         viewMatrix = calculateViewMatrix()
         projectionMatrix = calculateProjectionMatrix(renderWindow.screenDimensionsF)
         viewProjectionMatrix = projectionMatrix * viewMatrix
         lastMatrixChange = System.currentTimeMillis()
-        for (shader in shaders) {
+        for (shader in renderWindow.shaders) {
+            if (shader.uniforms.contains("viewProjectionMatrix")) {
                 shader.use().setMat4("viewProjectionMatrix", viewProjectionMatrix)
             }
+        }
         positionChangeCallback()
     }
 
@@ -244,9 +231,7 @@ class Camera(
         renderWindow.setSkyColor(connection.world.getBiome(blockPosition)?.skyColor ?: RenderConstants.DEFAULT_SKY_COLOR)
 
         frustum.recalculate()
-        for (frustumChangeCallback in frustumChangeCallbacks) {
+        connection.fireEvent(FrustumChangeEvent(renderWindow, frustum))
-            frustumChangeCallback.onFrustumChange()
-        }
 
         connection.world.dimension?.hasSkyLight?.let {
             if (it) {

src/main/java/de/bixilon/minosoft/gui/rendering/RenderWindow.kt

@@ -18,20 +18,19 @@ import de.bixilon.minosoft.config.config.game.controls.KeyBindingsNames
 import de.bixilon.minosoft.data.mappings.ResourceLocation
 import de.bixilon.minosoft.data.text.RGBColor
 import de.bixilon.minosoft.data.text.RGBColor.Companion.asColor
-import de.bixilon.minosoft.gui.input.camera.FrustumChangeCallback
 import de.bixilon.minosoft.gui.input.key.RenderWindowInputHandler
-import de.bixilon.minosoft.gui.modding.events.RenderingStateChangeEvent
 import de.bixilon.minosoft.gui.rendering.chunk.WorldRenderer
 import de.bixilon.minosoft.gui.rendering.font.Font
 import de.bixilon.minosoft.gui.rendering.hud.HUDRenderer
 import de.bixilon.minosoft.gui.rendering.hud.atlas.TextureLike
 import de.bixilon.minosoft.gui.rendering.hud.atlas.TextureLikeTexture
-import de.bixilon.minosoft.gui.rendering.shader.ShaderHolder
+import de.bixilon.minosoft.gui.rendering.modding.events.RenderingStateChangeEvent
+import de.bixilon.minosoft.gui.rendering.modding.events.ScreenResizeEvent
+import de.bixilon.minosoft.gui.rendering.shader.Shader
 import de.bixilon.minosoft.gui.rendering.sky.SkyRenderer
 import de.bixilon.minosoft.gui.rendering.textures.Texture
 import de.bixilon.minosoft.gui.rendering.textures.TextureArray
 import de.bixilon.minosoft.gui.rendering.util.ScreenshotTaker
-import de.bixilon.minosoft.gui.rendering.util.abstractions.ScreenResizeCallback
 import de.bixilon.minosoft.modding.event.CallbackEventInvoker
 import de.bixilon.minosoft.modding.event.events.ConnectionStateChangeEvent
 import de.bixilon.minosoft.modding.event.events.PacketReceiveEvent
@@ -41,7 +40,6 @@ import de.bixilon.minosoft.protocol.protocol.ProtocolDefinition
 import de.bixilon.minosoft.util.CountUpAndDownLatch
 import de.bixilon.minosoft.util.KUtil.synchronizedListOf
 import de.bixilon.minosoft.util.KUtil.synchronizedMapOf
-import de.bixilon.minosoft.util.KUtil.synchronizedSetOf
 import de.bixilon.minosoft.util.Stopwatch
 import de.bixilon.minosoft.util.logging.Log
 import de.bixilon.minosoft.util.logging.LogMessageType
@@ -84,11 +82,12 @@ class RenderWindow(
 
     val renderQueue: MutableList<Runnable> = synchronizedListOf()
 
+
+    val shaders: MutableList<Shader> = mutableListOf()
+
     lateinit var WHITE_TEXTURE: TextureLike
 
 
-    val screenResizeCallbacks: MutableSet<ScreenResizeCallback> = synchronizedSetOf(inputHandler.camera)
-
     var tickCount = 0L
     var lastTickTimer = System.currentTimeMillis()
 
@@ -221,9 +220,6 @@ class RenderWindow(
         Log.log(LogMessageType.RENDERING_LOADING) { "Post loading renderer (${stopwatch.labTime()})..." }
         for (renderer in rendererMap.values) {
             renderer.postInit()
-            if (renderer is ShaderHolder) {
-                inputHandler.camera.addShaders(renderer.shader)
-            }
         }
 
 
@@ -231,11 +227,10 @@ class RenderWindow(
         glfwSetWindowSizeCallback(windowId, object : GLFWWindowSizeCallback() {
             override fun invoke(window: Long, width: Int, height: Int) {
                 glViewport(0, 0, width, height)
+                val previousSize = screenDimensions
                 screenDimensions = Vec2i(width, height)
                 screenDimensionsF = Vec2(screenDimensions)
-                for (callback in screenResizeCallbacks) {
+                connection.fireEvent(ScreenResizeEvent(previousScreenDimensions = previousSize, screenDimensions = screenDimensions))
-                    callback.onScreenResize(screenDimensions)
-                }
             }
         })
 
@@ -266,9 +261,7 @@ class RenderWindow(
 
         registerGlobalKeyCombinations()
 
-        for (callback in screenResizeCallbacks) {
+        connection.fireEvent(ScreenResizeEvent(previousScreenDimensions = Vec2i(0, 0), screenDimensions = screenDimensions))
-            callback.onScreenResize(screenDimensions)
-        }
 
 
         Log.log(LogMessageType.RENDERING_LOADING) { "Rendering is fully prepared in  ${stopwatch.totalTime()}" }
@@ -392,12 +385,6 @@ class RenderWindow(
     fun registerRenderer(renderBuilder: RenderBuilder) {
         val renderer = renderBuilder.build(connection, this)
         rendererMap[renderBuilder.RESOURCE_LOCATION] = renderer
-        if (renderer is ScreenResizeCallback) {
-            screenResizeCallbacks.add(renderer)
-        }
-        if (renderer is FrustumChangeCallback) {
-            inputHandler.camera.addFrustumChangeCallback(renderer)
-        }
     }
 
     @Deprecated(message = "Will be replaced with SkyRenderer")

src/main/java/de/bixilon/minosoft/gui/rendering/Renderer.kt

@@ -14,7 +14,7 @@
 package de.bixilon.minosoft.gui.rendering
 
 interface Renderer {
-    fun init()
+    fun init() {}
-    fun postInit()
+    fun postInit() {}
-    fun draw()
+    fun draw() {}
 }

src/main/java/de/bixilon/minosoft/gui/rendering/Rendering.kt

@@ -29,10 +29,12 @@ class Rendering(private val connection: PlayConnection) {
         Thread({
             try {
                 Log.log(LogMessageType.RENDERING_GENERAL, LogLevels.INFO) { "Hello LWJGL ${Version.getVersion()}!" }
+                CONTEXT_MAP[Thread.currentThread()] = renderWindow
                 renderWindow.init(latch)
                 renderWindow.startRenderLoop()
                 renderWindow.exit()
             } catch (exception: Throwable) {
+                CONTEXT_MAP.remove(Thread.currentThread())
                 exception.printStackTrace()
                 try {
                     renderWindow.exit()
@@ -45,4 +47,11 @@ class Rendering(private val connection: PlayConnection) {
             }
         }, "Rendering").start()
     }
+
+    companion object {
+        private val CONTEXT_MAP: MutableMap<Thread, RenderWindow> = mutableMapOf()
+
+        val currentContext: RenderWindow?
+            get() = CONTEXT_MAP[Thread.currentThread()]
+    }
 }

src/main/java/de/bixilon/minosoft/gui/rendering/chunk/SectionArrayMesh.kt

@@ -27,8 +27,6 @@ import org.lwjgl.opengl.GL20.glVertexAttribPointer
 class SectionArrayMesh : Mesh(initialCacheSize = 100000) {
 
     fun addVertex(position: Vec3, textureCoordinates: Vec2, texture: Texture, tintColor: RGBColor?, lightLevel: Int = 14) {
-        val data = data!!
-
         val color = tintColor ?: ChatColors.WHITE
 
         val lightFactor = (lightLevel + 1) / MAX_LIGHT_LEVEL_FLOAT

src/main/java/de/bixilon/minosoft/gui/rendering/chunk/WorldRenderer.kt

@@ -25,11 +25,11 @@ import de.bixilon.minosoft.data.world.Chunk
 import de.bixilon.minosoft.data.world.ChunkSection
 import de.bixilon.minosoft.data.world.ChunkSection.Companion.indexPosition
 import de.bixilon.minosoft.data.world.World
-import de.bixilon.minosoft.gui.input.camera.FrustumChangeCallback
+import de.bixilon.minosoft.gui.input.camera.Frustum
-import de.bixilon.minosoft.gui.modding.events.RenderingStateChangeEvent
 import de.bixilon.minosoft.gui.rendering.*
+import de.bixilon.minosoft.gui.rendering.modding.events.FrustumChangeEvent
+import de.bixilon.minosoft.gui.rendering.modding.events.RenderingStateChangeEvent
 import de.bixilon.minosoft.gui.rendering.shader.Shader
-import de.bixilon.minosoft.gui.rendering.shader.ShaderHolder
 import de.bixilon.minosoft.gui.rendering.textures.Texture
 import de.bixilon.minosoft.gui.rendering.util.VecUtil.chunkPosition
 import de.bixilon.minosoft.gui.rendering.util.VecUtil.of
@@ -52,11 +52,11 @@ import org.lwjgl.opengl.GL11.glDepthMask
 class WorldRenderer(
     private val connection: PlayConnection,
     val renderWindow: RenderWindow,
-) : Renderer, ShaderHolder, FrustumChangeCallback {
+) : Renderer {
     private val world: World = connection.world
     private val waterBlock = connection.mapping.blockRegistry.get(ResourceLocation("minecraft:water"))?.nullCast<FluidBlock>()
 
-    override lateinit var shader: Shader
+    lateinit var chunkShader: Shader
     val allChunkSections: MutableMap<Vec2i, MutableMap<Int, ChunkMeshCollection>> = synchronizedMapOf()
     val visibleChunks: MutableMap<Vec2i, MutableMap<Int, ChunkMeshCollection>> = synchronizedMapOf()
     val queuedChunks: MutableSet<Vec2i> = synchronizedSetOf()
@@ -160,19 +160,20 @@ class WorldRenderer(
                 clearChunkCache()
             }
         })
+
+        connection.registerEvent(CallbackEventInvoker.of<FrustumChangeEvent> { onFrustumChange(it.frustum) })
     }
 
     override fun postInit() {
         check(renderWindow.textures.animator.animatedTextures.size < 4096) { "Can not have more than 4096 animated textures!" } // uniform buffer limit: 16kb. 4 ints per texture
-        shader = Shader(
+        chunkShader = Shader(
-            vertexPath = ResourceLocation(ProtocolDefinition.MINOSOFT_NAMESPACE, "rendering/shader/chunk_vertex.glsl"),
+            resourceLocation = ResourceLocation(ProtocolDefinition.MINOSOFT_NAMESPACE, "chunk"),
-            fragmentPath = ResourceLocation(ProtocolDefinition.MINOSOFT_NAMESPACE, "rendering/shader/chunk_fragment.glsl"),
             defines = mapOf("ANIMATED_TEXTURE_COUNT" to MMath.clamp(renderWindow.textures.animator.animatedTextures.size, 1, Int.MAX_VALUE)),
         )
-        shader.load()
+        chunkShader.load()
 
-        renderWindow.textures.use(shader, "textureArray")
+        renderWindow.textures.use(chunkShader, "textureArray")
-        renderWindow.textures.animator.use(shader, "AnimatedDataBuffer")
+        renderWindow.textures.animator.use(chunkShader, "AnimatedDataBuffer")
 
         for (blockState in allBlocks!!) {
             for (model in blockState.renderers) {
@@ -183,7 +184,7 @@ class WorldRenderer(
     }
 
     override fun draw() {
-        shader.use()
+        chunkShader.use()
         val visibleChunks = visibleChunks.toSynchronizedMap()
 
         for ((_, map) in visibleChunks) {
@@ -398,13 +399,13 @@ class WorldRenderer(
         prepareWorld(connection.world)
     }
 
-    override fun onFrustumChange() {
+    private fun onFrustumChange(frustum: Frustum) {
         visibleChunks.clear()
         for ((chunkLocation, rawIndexMap) in allChunkSections.toSynchronizedMap()) {
             val visibleIndexMap: MutableMap<Int, ChunkMeshCollection> = synchronizedMapOf()
             val indexMap = rawIndexMap.toMap()
             for ((index, mesh) in indexMap) {
-                if (renderWindow.inputHandler.camera.frustum.containsChunk(chunkLocation, mesh.lowestBlockHeight, mesh.highestBlockHeight)) {
+                if (frustum.containsChunk(chunkLocation, mesh.lowestBlockHeight, mesh.highestBlockHeight)) {
                     visibleIndexMap[index] = mesh
                 }
             }

src/main/java/de/bixilon/minosoft/gui/rendering/hud/HUDMesh.kt

@@ -35,7 +35,7 @@ class HUDMesh : Mesh() {
     }
 
     fun addCacheMesh(cacheMesh: HUDCacheMesh) {
-        data!!.addAll(cacheMesh.cache)
+        data.addAll(cacheMesh.cache)
     }
 
 

src/main/java/de/bixilon/minosoft/gui/rendering/hud/HUDRenderer.kt

@@ -26,8 +26,9 @@ import de.bixilon.minosoft.gui.rendering.hud.nodes.HUDElement
 import de.bixilon.minosoft.gui.rendering.hud.nodes.chat.ChatBoxHUDElement
 import de.bixilon.minosoft.gui.rendering.hud.nodes.debug.HUDSystemDebugNode
 import de.bixilon.minosoft.gui.rendering.hud.nodes.debug.HUDWorldDebugNode
+import de.bixilon.minosoft.gui.rendering.modding.events.ScreenResizeEvent
 import de.bixilon.minosoft.gui.rendering.shader.Shader
-import de.bixilon.minosoft.gui.rendering.util.abstractions.ScreenResizeCallback
+import de.bixilon.minosoft.modding.event.CallbackEventInvoker
 import de.bixilon.minosoft.protocol.network.connection.PlayConnection
 import de.bixilon.minosoft.protocol.protocol.ProtocolDefinition
 import de.bixilon.minosoft.util.MMath
@@ -36,12 +37,11 @@ import glm_.glm
 import glm_.mat4x4.Mat4
 import glm_.vec2.Vec2i
 
-class HUDRenderer(val connection: PlayConnection, val renderWindow: RenderWindow) : Renderer, ScreenResizeCallback {
+class HUDRenderer(val connection: PlayConnection, val renderWindow: RenderWindow) : Renderer {
     private val hudElements: MutableMap<ResourceLocation, Pair<HUDElementProperties, HUDElement>> = mutableMapOf()
     private val enabledHUDElement: MutableMap<ResourceLocation, Pair<HUDElementProperties, HUDElement>> = mutableMapOf()
     private val hudShader = Shader(
-        vertexPath = ResourceLocation(ProtocolDefinition.MINOSOFT_NAMESPACE, "rendering/shader/hud_vertex.glsl"),
+        resourceLocation = ResourceLocation(ProtocolDefinition.MINOSOFT_NAMESPACE, "hud"),
-        fragmentPath = ResourceLocation(ProtocolDefinition.MINOSOFT_NAMESPACE, "rendering/shader/hud_fragment.glsl"),
     )
     lateinit var hudAtlasElements: Map<ResourceLocation, HUDAtlasElement>
     var orthographicMatrix: Mat4 = Mat4()
@@ -74,6 +74,13 @@ class HUDRenderer(val connection: PlayConnection, val renderWindow: RenderWindow
         renderWindow.inputHandler.registerKeyCallback(KeyBindingsNames.CLOSE) {
 
         }
+
+        connection.registerEvent(CallbackEventInvoker.of<ScreenResizeEvent> {
+            orthographicMatrix = glm.ortho(-it.screenDimensions.x / 2.0f, it.screenDimensions.x / 2.0f, -it.screenDimensions.y / 2.0f, it.screenDimensions.y / 2.0f)
+            for ((_, hudElement) in hudElements.values) {
+                hudElement.layout.clearChildrenCache()
+            }
+        })
     }
 
     private fun registerDefaultElements() {
@@ -95,9 +102,6 @@ class HUDRenderer(val connection: PlayConnection, val renderWindow: RenderWindow
         }
         val hudElement = builder.build(this)
         hudElement.properties = properties
-        if (hudElement is ScreenResizeCallback) {
-            renderWindow.screenResizeCallbacks.add(hudElement)
-        }
         val pair = Pair(properties, hudElement)
         hudElements[builder.RESOURCE_LOCATION] = pair
 
@@ -124,12 +128,6 @@ class HUDRenderer(val connection: PlayConnection, val renderWindow: RenderWindow
     fun removeElement(resourceLocation: ResourceLocation) {
         val element = hudElements[resourceLocation] ?: return
 
-        element.second.let {
-            if (it is ScreenResizeCallback) {
-                renderWindow.screenResizeCallbacks.remove(it)
-            }
-        }
-
         element.first.toggleKeyBinding?.let {
             renderWindow.inputHandler.unregisterKeyBinding(it)
         }
@@ -150,13 +148,6 @@ class HUDRenderer(val connection: PlayConnection, val renderWindow: RenderWindow
         }
     }
 
-    override fun onScreenResize(screenDimensions: Vec2i) {
-        orthographicMatrix = glm.ortho(-screenDimensions.x / 2.0f, screenDimensions.x / 2.0f, -screenDimensions.y / 2.0f, screenDimensions.y / 2.0f)
-        for ((_, hudElement) in hudElements.values) {
-            hudElement.layout.clearChildrenCache()
-        }
-    }
-
     override fun draw() {
         if (!RenderConstants.RENDER_HUD) {
             return

src/main/java/de/bixilon/minosoft/gui/rendering/hud/nodes/chat/ChatBoxHUDElement.kt

@@ -23,11 +23,12 @@ import de.bixilon.minosoft.gui.rendering.hud.elements.input.TextField
 import de.bixilon.minosoft.gui.rendering.hud.elements.input.TextFieldProperties
 import de.bixilon.minosoft.gui.rendering.hud.nodes.HUDElement
 import de.bixilon.minosoft.gui.rendering.hud.nodes.layout.AbsoluteLayout
-import de.bixilon.minosoft.gui.rendering.util.abstractions.ScreenResizeCallback
+import de.bixilon.minosoft.gui.rendering.modding.events.ScreenResizeEvent
+import de.bixilon.minosoft.modding.event.CallbackEventInvoker
 import glm_.vec2.Vec2
 import glm_.vec2.Vec2i
 
-class ChatBoxHUDElement(hudRenderer: HUDRenderer) : HUDElement(hudRenderer), ScreenResizeCallback {
+class ChatBoxHUDElement(hudRenderer: HUDRenderer) : HUDElement(hudRenderer) {
     override val layout = AbsoluteLayout(hudRenderer.renderWindow)
     private lateinit var inputField: TextField
 
@@ -48,13 +49,12 @@ class ChatBoxHUDElement(hudRenderer: HUDRenderer) : HUDElement(hudRenderer), Scr
         hudRenderer.renderWindow.inputHandler.registerKeyCallback(KeyBindingsNames.OPEN_CHAT) {
             openChat()
         }
-    }
+        hudRenderer.connection.registerEvent(CallbackEventInvoker.of<ScreenResizeEvent> {
-
+            layout.sizing.minSize.x = it.screenDimensions.x
-    override fun onScreenResize(screenDimensions: Vec2i) {
+            layout.sizing.maxSize.x = it.screenDimensions.x
-        layout.sizing.minSize.x = screenDimensions.x
-        layout.sizing.maxSize.x = screenDimensions.x
             inputField.textElement.setProperties.hardWrap = (inputField.textElement.sizing.minSize.x / scale).toInt()
             layout.apply()
+        })
     }
 
     fun openChat() {

src/main/java/de/bixilon/minosoft/gui/rendering/hud/nodes/debug/HUDSystemDebugNode.kt

@@ -19,18 +19,18 @@ import de.bixilon.minosoft.gui.rendering.hud.HUDElementProperties
 import de.bixilon.minosoft.gui.rendering.hud.HUDRenderBuilder
 import de.bixilon.minosoft.gui.rendering.hud.HUDRenderer
 import de.bixilon.minosoft.gui.rendering.hud.nodes.properties.NodeAlignment
-import de.bixilon.minosoft.gui.rendering.util.abstractions.ScreenResizeCallback
+import de.bixilon.minosoft.gui.rendering.modding.events.ScreenResizeEvent
+import de.bixilon.minosoft.modding.event.CallbackEventInvoker
 import de.bixilon.minosoft.modding.loading.ModLoader
 import de.bixilon.minosoft.protocol.protocol.ProtocolDefinition
 import de.bixilon.minosoft.util.GitInfo
 import de.bixilon.minosoft.util.SystemInformation
 import de.bixilon.minosoft.util.UnitFormatter
 import glm_.vec2.Vec2
-import glm_.vec2.Vec2i
 import org.lwjgl.opengl.GL11.*
 
 
-class HUDSystemDebugNode(hudRenderer: HUDRenderer) : DebugScreenNode(hudRenderer), ScreenResizeCallback {
+class HUDSystemDebugNode(hudRenderer: HUDRenderer) : DebugScreenNode(hudRenderer) {
 
     init {
         layout.sizing.forceAlign = NodeAlignment.RIGHT
@@ -67,13 +67,13 @@ class HUDSystemDebugNode(hudRenderer: HUDRenderer) : DebugScreenNode(hudRenderer
         text("Mods: ${ModLoader.MOD_MAP.size} active, ${hudRenderer.connection.eventListenerSize} listeners")
     }
 
-    override fun onScreenResize(screenDimensions: Vec2i) {
-        displayText.sText = "Display: ${getScreenDimensions()}"
-    }
-
     override fun init() {
         gpuText.sText = "GPU: " + (glGetString(GL_RENDERER) ?: "unknown")
         gpuVersionText.sText = "Version: " + (glGetString(GL_VERSION) ?: "unknown")
+
+        hudRenderer.connection.registerEvent(CallbackEventInvoker.of<ScreenResizeEvent> {
+            displayText.sText = "Display: ${getScreenDimensions()}"
+        })
     }
 
     override fun draw() {

src/main/java/de/bixilon/minosoft/gui/rendering/modding/events/FrustumChangeEvent.kt

@@ -11,8 +11,13 @@
  * This software is not affiliated with Mojang AB, the original developer of Minecraft.
  */
 
-package de.bixilon.minosoft.gui.input.camera
+package de.bixilon.minosoft.gui.rendering.modding.events
 
-interface FrustumChangeCallback {
+import de.bixilon.minosoft.gui.input.camera.Frustum
-    fun onFrustumChange()
+import de.bixilon.minosoft.gui.rendering.RenderWindow
-}
+import de.bixilon.minosoft.gui.rendering.Rendering
+
+class FrustumChangeEvent(
+    renderWindow: RenderWindow = Rendering.currentContext!!,
+    val frustum: Frustum,
+) : RenderEvent(renderWindow)

src/main/java/de/bixilon/minosoft/gui/rendering/modding/events/RenderEvent.kt

@@ -11,11 +11,11 @@
  * This software is not affiliated with Mojang AB, the original developer of Minecraft.
  */
 
-package de.bixilon.minosoft.gui.rendering.util.abstractions
+package de.bixilon.minosoft.gui.rendering.modding.events
 
-import glm_.vec2.Vec2i
+import de.bixilon.minosoft.gui.rendering.RenderWindow
+import de.bixilon.minosoft.modding.event.events.PlayConnectionEvent
 
-interface ScreenResizeCallback {
+abstract class RenderEvent(
-
+    val renderWindow: RenderWindow,
-    fun onScreenResize(screenDimensions: Vec2i) {}
+) : PlayConnectionEvent(renderWindow.connection)
-}

src/main/java/de/bixilon/minosoft/gui/rendering/modding/events/RenderingStateChangeEvent.kt

@@ -11,7 +11,7 @@
  * This software is not affiliated with Mojang AB, the original developer of Minecraft.
  */
 
-package de.bixilon.minosoft.gui.modding.events
+package de.bixilon.minosoft.gui.rendering.modding.events
 
 import de.bixilon.minosoft.gui.rendering.RenderingStates
 import de.bixilon.minosoft.modding.event.events.PlayConnectionEvent

src/main/java/de/bixilon/minosoft/gui/rendering/modding/events/ScreenResizeEvent.kt

@@ -11,8 +11,14 @@
  * This software is not affiliated with Mojang AB, the original developer of Minecraft.
  */
 
-package de.bixilon.minosoft.gui.rendering.shader
+package de.bixilon.minosoft.gui.rendering.modding.events
 
-interface ShaderHolder {
+import de.bixilon.minosoft.gui.rendering.RenderWindow
-    val shader: Shader
+import de.bixilon.minosoft.gui.rendering.Rendering
-}
+import glm_.vec2.Vec2i
+
+class ScreenResizeEvent(
+    renderWindow: RenderWindow = Rendering.currentContext!!,
+    val previousScreenDimensions: Vec2i,
+    val screenDimensions: Vec2i,
+) : RenderEvent(renderWindow)

src/main/java/de/bixilon/minosoft/gui/rendering/shader/Shader.kt

@@ -15,7 +15,9 @@ package de.bixilon.minosoft.gui.rendering.shader
 
 import de.bixilon.minosoft.Minosoft
 import de.bixilon.minosoft.data.assets.AssetsManager
+import de.bixilon.minosoft.data.commands.CommandStringReader
 import de.bixilon.minosoft.data.mappings.ResourceLocation
+import de.bixilon.minosoft.gui.rendering.Rendering
 import de.bixilon.minosoft.gui.rendering.exceptions.ShaderLoadingException
 import de.bixilon.minosoft.gui.rendering.util.OpenGLUtil
 import glm_.mat4x4.Mat4
@@ -30,19 +32,23 @@ import org.lwjgl.opengl.ARBVertexShader.GL_VERTEX_SHADER_ARB
 import org.lwjgl.opengl.GL11.GL_FALSE
 import org.lwjgl.opengl.GL43.*
 import org.lwjgl.system.MemoryUtil
+import java.io.FileNotFoundException
 
 class Shader(
-    private val vertexPath: ResourceLocation,
+    private val resourceLocation: ResourceLocation,
-    private val geometryPath: ResourceLocation? = null,
-    private val fragmentPath: ResourceLocation,
     private val defines: Map<String, Any> = mapOf(),
 ) {
+    lateinit var uniforms: List<String>
+        private set
     private var programId = 0
 
     fun load(assetsManager: AssetsManager = Minosoft.MINOSOFT_ASSETS_MANAGER): Int {
-        val vertexShader = createShader(assetsManager, vertexPath, GL_VERTEX_SHADER_ARB, defines)
+        val uniforms: MutableList<String> = mutableListOf()
-        val geometryShader = geometryPath?.let { createShader(assetsManager, it, GL_GEOMETRY_SHADER_ARB, defines) }
+        val pathPrefix = resourceLocation.namespace + ":rendering/shader/" + resourceLocation.path + "/" + resourceLocation.path.replace("/", "_")
-        val fragmentShader = createShader(assetsManager, fragmentPath, GL_FRAGMENT_SHADER_ARB, defines)
+        val vertexShader = createShader(assetsManager, ResourceLocation("$pathPrefix.vsh"), GL_VERTEX_SHADER_ARB, defines, uniforms)!!
+        val geometryShader = createShader(assetsManager, ResourceLocation("$pathPrefix.gsh"), GL_GEOMETRY_SHADER_ARB, defines, uniforms)
+        val fragmentShader = createShader(assetsManager, ResourceLocation("$pathPrefix.fsh"), GL_FRAGMENT_SHADER_ARB, defines, uniforms)!!
+        this.uniforms = uniforms.toList()
         programId = glCreateProgramObjectARB()
 
         if (programId.toLong() == MemoryUtil.NULL) {
@@ -71,13 +77,15 @@ class Shader(
         }
         glDeleteShader(fragmentShader)
 
+        val context = Rendering.currentContext!!
+        context.shaders.add(this)
         return programId
     }
 
     fun use(): Shader {
-        if (usedShader !== this) {
+        if (currentShaderInUse !== this) {
             glUseProgram(programId)
-            usedShader = this
+            currentShaderInUse = this
         }
         return this
     }
@@ -142,22 +150,26 @@ class Shader(
 
 
     companion object {
-        private var usedShader: Shader? = null
+        private var currentShaderInUse: Shader? = null
 
-
+        private fun createShader(assetsManager: AssetsManager = Minosoft.MINOSOFT_ASSETS_MANAGER, resourceLocation: ResourceLocation, shaderType: Int, defines: Map<String, Any>, uniforms: MutableList<String>): Int? {
-        private fun createShader(assetsManager: AssetsManager = Minosoft.MINOSOFT_ASSETS_MANAGER, resourceLocation: ResourceLocation, shaderType: Int, defines: Map<String, Any>): Int {
             val shaderId = glCreateShaderObjectARB(shaderType)
             if (shaderId.toLong() == MemoryUtil.NULL) {
                 throw ShaderLoadingException()
             }
             val total = StringBuilder()
-            val lines = assetsManager.readStringAsset(resourceLocation).lines()
+            val lines = try {
+                assetsManager.readStringAsset(resourceLocation).lines()
+            } catch (exception: FileNotFoundException) {
+                return null
+            }
 
             for (line in lines) {
                 total.append(line)
                 total.append('\n')
-                if (line.startsWith("#version")) {
+                val reader = CommandStringReader(line)
-
+                when {
+                    line.startsWith("#version") -> {
                         // add all defines
                         total.append('\n')
                         for ((define, value) in defines) {
@@ -168,6 +180,14 @@ class Shader(
                             total.append('\n')
                         }
                     }
+                    line.startsWith("uniform ") -> { // ToDo: Packed in layout
+                        reader.readUnquotedString() // "uniform"
+                        reader.skipWhitespaces()
+                        reader.readUnquotedString() // datatype
+                        reader.skipWhitespaces()
+                        uniforms.add(reader.readString()) // uniform name
+                    }
+                }
             }
 
             glShaderSourceARB(shaderId, total.toString())

src/main/java/de/bixilon/minosoft/gui/rendering/sky/SkyMesh.kt

@@ -22,8 +22,6 @@ import org.lwjgl.opengl.GL20.glVertexAttribPointer
 class SkyMesh : Mesh(initialCacheSize = 6 * 2 * 3 * FLOATS_PER_VERTEX) {
 
     fun addVertex(position: Vec3) {
-        val data = data!!
-
         data.addAll(floatArrayOf(
             position.x,
             position.y,

src/main/java/de/bixilon/minosoft/gui/rendering/sky/SkyRenderer.kt

@@ -18,7 +18,6 @@ import de.bixilon.minosoft.gui.rendering.RenderBuilder
 import de.bixilon.minosoft.gui.rendering.RenderWindow
 import de.bixilon.minosoft.gui.rendering.Renderer
 import de.bixilon.minosoft.gui.rendering.shader.Shader
-import de.bixilon.minosoft.gui.rendering.shader.ShaderHolder
 import de.bixilon.minosoft.protocol.network.connection.PlayConnection
 import de.bixilon.minosoft.protocol.protocol.ProtocolDefinition
 import org.lwjgl.opengl.GL11.*
@@ -26,39 +25,35 @@ import org.lwjgl.opengl.GL11.*
 class SkyRenderer(
     private val connection: PlayConnection,
     val renderWindow: RenderWindow,
-) : Renderer, ShaderHolder {
+) : Renderer {
     private var lastMatrixUpdate = System.currentTimeMillis()
-    override val shader = Shader(
+    private val skyColorShader = Shader(
-        vertexPath = ResourceLocation(ProtocolDefinition.MINOSOFT_NAMESPACE, "rendering/shader/sky_vertex.glsl"),
+        resourceLocation = ResourceLocation(ProtocolDefinition.MINOSOFT_NAMESPACE, "sky/color"),
-        fragmentPath = ResourceLocation(ProtocolDefinition.MINOSOFT_NAMESPACE, "rendering/shader/sky_fragment.glsl"),
     )
     private val mesh = SkyMesh()
 
     init {
-        mesh.data!!.addAll(VERTICES)
+        mesh.data.addAll(VERTICES)
     }
 
     override fun init() {
-        shader.load()
+        skyColorShader.load()
 
         mesh.load()
     }
 
-    override fun postInit() {
-    }
-
     private fun setShaderMatrix() {
         if (lastMatrixUpdate == renderWindow.inputHandler.camera.lastMatrixChange) {
             return
         }
-        shader.use().setMat4("skyViewProjectionMatrix", renderWindow.inputHandler.camera.projectionMatrix * renderWindow.inputHandler.camera.viewMatrix.toMat3().toMat4())
+        skyColorShader.use().setMat4("skyViewProjectionMatrix", renderWindow.inputHandler.camera.projectionMatrix * renderWindow.inputHandler.camera.viewMatrix.toMat3().toMat4())
         lastMatrixUpdate = renderWindow.inputHandler.camera.lastMatrixChange
     }
 
 
     override fun draw() {
         glDepthFunc(GL_LEQUAL)
-        shader.use()
+        skyColorShader.use()
         setShaderMatrix()
         mesh.draw()
         glDepthFunc(GL_LESS)

src/main/java/de/bixilon/minosoft/gui/rendering/util/Mesh.kt

@@ -21,7 +21,13 @@ import org.lwjgl.opengl.GL30.*
 abstract class Mesh(
     initialCacheSize: Int = 10000,
 ) {
-    var data: ArrayFloatList? = ArrayFloatList(initialCacheSize)
+    private var _data: ArrayFloatList? = ArrayFloatList(initialCacheSize)
+    var data: ArrayFloatList
+        get() = _data!!
+        set(value) {
+            _data = value
+        }
+
     private var vao: Int = -1
     private var vbo: Int = -1
     var trianglesCount: Int = -1
@@ -36,16 +42,16 @@ abstract class Mesh(
     protected fun initializeBuffers(floatsPerVertex: Int) {
         check(state == MeshStates.PREPARING) { "Mesh already loaded: $state" }
 
-        trianglesCount = data!!.size / floatsPerVertex
+        trianglesCount = data.size / floatsPerVertex
         vao = glGenVertexArrays()
         vbo = glGenBuffers()
         glBindVertexArray(vao)
         glBindBuffer(GL_ARRAY_BUFFER, vbo)
 
-        glBufferData(GL_ARRAY_BUFFER, data!!.toArray(), GL_STATIC_DRAW)
+        glBufferData(GL_ARRAY_BUFFER, data.toArray(), GL_STATIC_DRAW)
 
         state = MeshStates.LOADED
-        data = null
+        _data = null
     }
 
     protected fun unbind() {