wip lightmap

src/main/java/de/bixilon/minosoft/data/world/light/WorldLightAccessor.kt

@@ -30,6 +30,9 @@ class WorldLightAccessor(
     }
 
     override fun getBlockLight(blockPosition: Vec3i): Int {
+        if (RenderConstants.DISABLE_LIGHTING) {
+            return 15
+        }
         return world.chunks[blockPosition.chunkPosition]?.lightAccessor?.getBlockLight(blockPosition) ?: 0
     }
 }

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

@@ -57,7 +57,7 @@ object RenderConstants {
 
     const val MAXIMUM_QUEUE_TIME_PER_FRAME = 100L
 
-    const val DISABLE_LIGHTING = true
+    const val DISABLE_LIGHTING = false
 
     const val RENDER_BLOCKS = true
     const val RENDER_FLUIDS = true

src/main/java/de/bixilon/minosoft/gui/rendering/block/LightMap.kt

@@ -0,0 +1,58 @@
+/*
+ * Minosoft
+ * Copyright (C) 2021 Moritz Zwerger
+ *
+ * This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * This software is not affiliated with Mojang AB, the original developer of Minecraft.
+ */
+
+package de.bixilon.minosoft.gui.rendering.block
+
+import de.bixilon.minosoft.data.text.RGBColor.Companion.asGray
+import de.bixilon.minosoft.gui.rendering.shader.Shader
+import de.bixilon.minosoft.gui.rendering.system.opengl.FloatUniformBuffer
+import de.bixilon.minosoft.protocol.network.connection.PlayConnection
+import de.bixilon.minosoft.protocol.protocol.ProtocolDefinition
+
+
+class LightMap(private val connection: PlayConnection) {
+    private val uniformBuffer = FloatUniformBuffer(1, FloatArray(16 * 16 * 4) { 1.0f })
+    private var lastUpdate = -1L
+
+
+    fun init() {
+        uniformBuffer.init()
+
+    }
+
+    fun use(shader: Shader, bufferName: String = "uLightMapBuffer") {
+        uniformBuffer.use(shader, bufferName)
+    }
+
+    fun update() {
+        val currentTime = System.currentTimeMillis()
+        if (currentTime - lastUpdate < ProtocolDefinition.TICK_TIME * 10) {
+            return
+        }
+        lastUpdate = currentTime
+
+        // ToDo
+        for (skyLight in 0 until 16) {
+            for (blockLight in 0 until 16) {
+                val index = ((skyLight shl 4) or blockLight) * 4
+
+                val color = ((blockLight + skyLight) / 30.0f).asGray()
+
+                uniformBuffer.data[index + 0] = color.floatRed
+                uniformBuffer.data[index + 1] = color.floatRed
+                uniformBuffer.data[index + 2] = color.floatGreen
+            }
+        }
+        uniformBuffer.upload()
+    }
+}

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

@@ -63,6 +63,7 @@ class WorldRenderer(
     private val waterBlock = connection.registries.blockRegistry[ResourceLocation("minecraft:water")]?.nullCast<FluidBlock>()
 
     lateinit var chunkShader: Shader
+    private val lightMap = LightMap(connection)
 
     val allChunkSections: SynchronizedMap<Vec2i, SynchronizedMap<Int, ChunkSectionMeshCollection>> = synchronizedMapOf()
     val visibleChunks: SynchronizedMap<Vec2i, SynchronizedMap<Int, ChunkSectionMeshCollection>> = synchronizedMapOf()
@@ -182,12 +183,14 @@ class WorldRenderer(
         check(renderWindow.textures.animator.animatedTextures.size < TextureArray.MAX_ANIMATED_TEXTURES) { "Can not have more than ${TextureArray.MAX_ANIMATED_TEXTURES} animated textures!" }
         chunkShader = Shader(
             renderWindow = renderWindow,
-            resourceLocation = ResourceLocation(ProtocolDefinition.MINOSOFT_NAMESPACE, "chunk"),
+            resourceLocation = ResourceLocation(ProtocolDefinition.MINOSOFT_NAMESPACE, "world"),
         )
         chunkShader.load()
+        lightMap.init()
 
         renderWindow.textures.use(chunkShader)
-        renderWindow.textures.animator.use(chunkShader, "uAnimationBuffer")
+        renderWindow.textures.animator.use(chunkShader)
+        lightMap.use(chunkShader)
 
         for (blockState in allBlocks!!) {
             for (model in blockState.renderers) {
@@ -199,6 +202,7 @@ class WorldRenderer(
 
     override fun update() {
         lastVisibleChunks = visibleChunks.toSynchronizedMap()
+        lightMap.update()
     }
 
     override fun draw() {

src/main/java/de/bixilon/minosoft/gui/rendering/block/mesh/ChunkSectionArrayMesh.kt

@@ -24,13 +24,9 @@ import glm_.vec3.Vec3
 
 class ChunkSectionArrayMesh : Mesh(SectionArrayMeshStruct::class, initialCacheSize = 100000) {
 
-    fun addVertex(position: Vec3, textureCoordinates: Vec2, texture: Texture, tintColor: RGBColor?, lightLevel: Int = 14) {
+    fun addVertex(position: Vec3, textureCoordinates: Vec2, texture: Texture, tintColor: RGBColor?, light: Int) {
         val color = tintColor ?: ChatColors.WHITE
 
-        val lightFactor = (lightLevel + 1) / MAX_LIGHT_LEVEL_FLOAT
-
-        val lightColor = RGBColor((color.red * lightFactor).toInt(), (color.green * lightFactor).toInt(), (color.blue * lightFactor).toInt())
-
         val textureLayer = if (RenderConstants.FORCE_DEBUG_TEXTURE) {
             RenderConstants.DEBUG_TEXTURE_ID
         } else {
@@ -44,7 +40,8 @@ class ChunkSectionArrayMesh : Mesh(SectionArrayMeshStruct::class, initialCacheSi
             textureCoordinates.y * texture.uvEnd.y,
             Float.fromBits(textureLayer),
             Float.fromBits(texture.properties.animation?.animationId ?: -1),
-            Float.fromBits(lightColor.rgb),
+            Float.fromBits(color.rgb),
+            Float.fromBits(light)
         ))
     }
 
@@ -61,6 +58,7 @@ class ChunkSectionArrayMesh : Mesh(SectionArrayMeshStruct::class, initialCacheSi
         val textureLayer: Int,
         val animationId: Int,
         val tintColor: RGBColor,
+        val light: Int,
     ) {
         companion object : MeshStruct(SectionArrayMeshStruct::class)
     }

src/main/java/de/bixilon/minosoft/gui/rendering/block/renderable/block/ElementRenderer.kt

@@ -94,8 +94,11 @@ class ElementRenderer(
 
         finalColor = finalColor.with(finalColor.floatRed * shadeLevel, finalColor.floatGreen * shadeLevel, finalColor.floatBlue * shadeLevel)
 
-        val lightLevel = context.lightAccessor.getLightLevel(context.blockPosition + face.cullFace?.let { directionMapping[it] }) // ToDo: rotate cullface
+        val lightPosition = context.blockPosition + face.cullFace?.let { directionMapping[it] }// ToDo: rotate cullface
+        val blockLight = context.lightAccessor.getBlockLight(lightPosition)
+        val skyLight = context.lightAccessor.getSkyLight(lightPosition)
 
+        val light = (skyLight shl 4) or blockLight
         val drawPositions = mutableListOf<Vec3>()
         for (position in positionTemplate) {
             drawPositions += transformedPositions[position]
@@ -113,7 +116,7 @@ class ElementRenderer(
                 textureCoordinates = texturePositions[texturePositionIndex]!!,
                 texture = texture,
                 tintColor = finalColor,
-                lightLevel = lightLevel,
+                light = light,
             )
         }
     }

src/main/java/de/bixilon/minosoft/gui/rendering/block/renderable/fluid/FluidRenderer.kt

@@ -143,7 +143,7 @@ class FluidRenderer(
                 textureCoordinates = texturePositions[vertex.second]!!,
                 texture = texture,
                 tintColor = tintColor,
-                lightLevel = lightLevel,
+                light = lightLevel,
             )
         }
     }

src/main/java/de/bixilon/minosoft/gui/rendering/system/opengl/FloatUniformBuffer.kt

@@ -0,0 +1,36 @@
+/*
+ * Minosoft
+ * Copyright (C) 2021 Moritz Zwerger
+ *
+ * This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * This software is not affiliated with Mojang AB, the original developer of Minecraft.
+ */
+
+package de.bixilon.minosoft.gui.rendering.system.opengl
+
+import org.lwjgl.opengl.ARBUniformBufferObject.GL_UNIFORM_BUFFER
+import org.lwjgl.opengl.GL15.*
+
+class FloatUniformBuffer(bindingIndex: Int = 0, var data: FloatArray = FloatArray(0)) : UniformBuffer(bindingIndex) {
+    override val size: Int
+        get() = data.size
+
+    override fun initialUpload() {
+        bind()
+        glBufferData(GL_UNIFORM_BUFFER, data, GL_DYNAMIC_DRAW)
+        unbind()
+    }
+
+    override fun upload() {
+        check(initialSize == size) { "Can not change buffer size!" }
+        bind()
+        glBufferSubData(GL_UNIFORM_BUFFER, 0, data)
+        unbind()
+    }
+
+}

src/main/java/de/bixilon/minosoft/gui/rendering/system/opengl/IntUniformBuffer.kt

@@ -16,7 +16,7 @@ package de.bixilon.minosoft.gui.rendering.system.opengl
 import org.lwjgl.opengl.ARBUniformBufferObject.GL_UNIFORM_BUFFER
 import org.lwjgl.opengl.GL15.*
 
-class IntUniformBuffer(var data: IntArray = IntArray(0)) : UniformBuffer() {
+class IntUniformBuffer(bindingIndex: Int = 0, var data: IntArray = IntArray(0)) : UniformBuffer(bindingIndex) {
     override val size: Int
         get() = data.size
 

src/main/java/de/bixilon/minosoft/gui/rendering/system/opengl/UniformBuffer.kt

@@ -18,7 +18,7 @@ import org.lwjgl.opengl.ARBUniformBufferObject.*
 import org.lwjgl.opengl.GL15.glBindBuffer
 import org.lwjgl.opengl.GL15.glGenBuffers
 
-abstract class UniformBuffer {
+abstract class UniformBuffer(private val bindingIndex: Int) {
     private var id = -1
     protected abstract val size: Int
     protected var initialSize = -1
@@ -27,7 +27,7 @@ abstract class UniformBuffer {
     fun init() {
         id = glGenBuffers()
         initialUpload()
-        glBindBufferRange(GL_UNIFORM_BUFFER, 0, id, 0, size.toLong())
+        glBindBufferRange(GL_UNIFORM_BUFFER, bindingIndex, id, 0, size.toLong())
         initialSize = size
     }
 
@@ -43,8 +43,8 @@ abstract class UniformBuffer {
     fun use(shader: Shader, bufferName: String) {
         shader.use()
 
-        shader.setUniformBuffer(bufferName, 0)
-        glBindBufferBase(GL_UNIFORM_BUFFER, 0, id)
+        shader.setUniformBuffer(bufferName, bindingIndex)
+        glBindBufferBase(GL_UNIFORM_BUFFER, bindingIndex, id)
     }
 
     protected abstract fun initialUpload()

src/main/resources/assets/minosoft/rendering/shader/includes/light.glsl

@@ -0,0 +1,22 @@
+/*
+ * Minosoft
+ * Copyright (C) 2020 Moritz Zwerger
+ *
+ * This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * This software is not affiliated with Mojang AB, the original developer of Minecraft.
+ */
+
+layout(std140) uniform uLightMapBuffer
+{
+    vec4 uLightMap[16 * 16];// ToDo: uint[256] should work without padding, but it seems there is padding. Using vec4 for now.
+};
+
+
+vec4 getLight(uint light) {
+    return uLightMap[light];
+}

src/main/resources/assets/minosoft/rendering/shader/world/world.vsh

@@ -19,6 +19,7 @@ layout (location = 2) in uint vinTextureLayer;
 
 layout (location = 3) in int vinAnimationIndex;
 layout (location = 4) in uint vinTintColor;
+layout (location = 5) in uint vinLight;
 
 flat out uint finTextureIndex1;
 out vec3 finTextureCoordinates1;
@@ -35,9 +36,11 @@ uniform mat4 uViewProjectionMatrix;
 
 #include "minosoft:color"
 
+#include "minosoft:light"
+
 void main() {
     gl_Position = uViewProjectionMatrix * vec4(vinPosition, 1.0f);
-    finTintColor = getRGBColor(vinTintColor);
+    finTintColor = getRGBColor(vinTintColor) * getLight(vinLight);
 
 
     if (vinAnimationIndex == -1) {