fog

src/main/java/de/bixilon/minosoft/config/config/game/graphics/GraphicsGameConfig.kt

@@ -20,4 +20,5 @@ data class GraphicsGameConfig(
     var animations: AnimationsGameConfig = AnimationsGameConfig(),
     var particles: ParticleConfig = ParticleConfig(),
     @Json(name = "biome_blend_radius") var biomeBlendRadius: Int = 3,
+    @Json(name = "fog_enabled") var fogEnabled: Boolean = true,
 )

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

@@ -18,6 +18,7 @@ import de.bixilon.minosoft.config.config.game.controls.KeyBindingsNames
 import de.bixilon.minosoft.data.entities.EntityRotation
 import de.bixilon.minosoft.data.player.LocalPlayerEntity
 import de.bixilon.minosoft.data.registries.blocks.types.FluidBlock
+import de.bixilon.minosoft.data.text.ChatColors
 import de.bixilon.minosoft.gui.rendering.RenderConstants
 import de.bixilon.minosoft.gui.rendering.RenderWindow
 import de.bixilon.minosoft.gui.rendering.input.camera.hit.BlockRaycastHit
@@ -50,6 +51,9 @@ class Camera(
     val connection: PlayConnection,
     val renderWindow: RenderWindow,
 ) {
+    var fogColor = ChatColors.GREEN
+    private var lastFogColor = fogColor
+    private var fogStart = 100.0f
     private var mouseSensitivity = Minosoft.getConfig().config.game.camera.moseSensitivity
     val entity: LocalPlayerEntity
         get() = connection.player
@@ -111,7 +115,32 @@ class Camera(
         setRotation(yaw, pitch)
     }
 
+    private fun calculateFogDistance() {
+        if (!Minosoft.config.config.game.graphics.fogEnabled) {
+            fogStart = Float.MAX_VALUE
+            return
+        }
+        val renderDistance = 10 // ToDo: Calculate correct, get real render distance
+        fogStart = (renderDistance * ProtocolDefinition.SECTION_WIDTH_X).toFloat()
+    }
+
+    private fun applyFog() {
+        for (shader in renderWindow.renderSystem.shaders) {
+            if (!shader.uniforms.contains("uFogColor")) {
+                continue
+
+            }
+            shader.use()
+
+            shader.setFloat("uFogStart", fogStart)
+            shader.setFloat("uFogEnd", fogStart + 10.0f)
+            shader.setRGBColor("uFogColor", fogColor)
+        }
+        lastFogColor = fogColor
+    }
+
     fun init(renderWindow: RenderWindow) {
+        calculateFogDistance()
         renderWindow.inputHandler.registerCheckCallback(
             KeyBindingsNames.MOVE_SPRINT,
             KeyBindingsNames.MOVE_FORWARD,
@@ -153,10 +182,19 @@ class Camera(
             projectionMatrix = projectionMatrix,
             viewProjectionMatrix = viewProjectionMatrix,
         ))
+
         for (shader in renderWindow.renderSystem.shaders) {
+            shader.use()
             if (shader.uniforms.contains("uViewProjectionMatrix")) {
-                shader.use().setMat4("uViewProjectionMatrix", Mat4(viewProjectionMatrix))
+                shader.setMat4("uViewProjectionMatrix", Mat4(viewProjectionMatrix))
             }
+            if (shader.uniforms.contains("uCameraPosition")) {
+                shader.setVec3("uCameraPosition", entity.cameraPosition)
+            }
+
+            shader.setFloat("uFogStart", fogStart)
+            shader.setFloat("uFogEnd", fogStart + 10.0f)
+            shader.setRGBColor("uFogColor", fogColor)
         }
     }
 
@@ -204,6 +242,9 @@ class Camera(
     }
 
     fun draw() {
+        if (fogColor != lastFogColor) {
+            applyFog()
+        }
         val input = if (renderWindow.inputHandler.currentKeyConsumer == null) {
             MovementInput(
                 pressingForward = renderWindow.inputHandler.isKeyBindingDown(KeyBindingsNames.MOVE_FORWARD),

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

@@ -115,20 +115,18 @@ class SkyRenderer(
     private fun checkSkyColor() {
         // ToDo: Calculate correct
         val brightness = 1.0f
-        val topColor = RGBColor((baseColor.red * brightness).toInt(), (baseColor.green * brightness).toInt(), (baseColor.blue * brightness).toInt())
-        val bottomColor = RGBColor(topColor.red * 8 / 9, topColor.green * 8 / 9, topColor.blue * 8 / 9)
-        renderWindow.queue += {
-            updateSkyColor(topColor, bottomColor)
+        val skyColor = RGBColor((baseColor.red * brightness).toInt(), (baseColor.green * brightness).toInt(), (baseColor.blue * brightness).toInt())
+
+        renderWindow.inputHandler.camera.fogColor = skyColor
+
+
+        for (shader in renderWindow.renderSystem.shaders) {
+            if (shader.uniforms.contains("uSkyColor")) {
+                shader.use().setRGBColor("uSkyColor", skyColor)
+            }
         }
     }
 
-    private fun updateSkyColor(topColor: RGBColor, bottomColor: RGBColor) {
-        skyboxShader.use()
-
-        skyboxShader.setRGBColor("uBottomColor", bottomColor)
-        skyboxShader.setRGBColor("uTopColor", topColor)
-    }
-
     private fun drawSkybox() {
         checkSkyColor()
         skyboxShader.use()

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

@@ -22,6 +22,7 @@ import de.bixilon.minosoft.util.MMath
 import glm_.mat4x4.Mat4
 import glm_.vec2.Vec2
 import glm_.vec3.Vec3
+import glm_.vec3.Vec3d
 import glm_.vec4.Vec4
 
 interface Shader {
@@ -50,6 +51,10 @@ interface Shader {
     fun setTexture(uniformName: String, textureId: Int)
     fun setUniformBuffer(uniformName: String, uniformBuffer: UniformBuffer)
 
+    fun setVec3(uniformName: String, vec3: Vec3d) {
+        setVec3(uniformName, Vec3(vec3))
+    }
+
     operator fun set(uniformName: String, data: Any?) {
         data ?: return
         when (data) {

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

@@ -54,9 +54,11 @@ class OpenGLShader(
             throw ShaderLoadingException()
         }
 
-        this.uniforms += code.uniforms
 
         glShaderSourceARB(program, code.code)
+
+        this.uniforms += code.uniforms
+
         glCompileShaderARB(program)
 
         if (glGetObjectParameteriARB(program, GL_OBJECT_COMPILE_STATUS_ARB) == GL_FALSE) {

src/main/java/de/bixilon/minosoft/protocol/packets/s2c/play/PositionAndRotationS2CP.kt

@@ -82,6 +82,6 @@ class PositionAndRotationS2CP(buffer: PlayInByteBuffer) : PlayS2CPacket() {
     }
 
     override fun log() {
-        Log.log(LogMessageType.NETWORK_PACKETS_IN, level = LogLevels.VERBOSE) { "LocalPlayerEntity position (position=$position, rotation=$rotation, onGround=$isOnGround, flags=$flags, teleportId=$teleportId, dismountVehicle=$dismountVehicle)" }
+        Log.log(LogMessageType.NETWORK_PACKETS_IN, level = LogLevels.VERBOSE) { "Player position (position=$position, rotation=$rotation, onGround=$isOnGround, flags=$flags, teleportId=$teleportId, dismountVehicle=$dismountVehicle)" }
     }
 }

src/main/resources/assets/minosoft/rendering/shader/includes/postprocessing/fragment.glsl

@@ -0,0 +1,47 @@
+/*
+ * 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.
+ */
+
+#ifdef POSTPROCESSING_FOG
+in vec3 finVertexPosition;
+uniform vec3 uCameraPosition;
+uniform float uFogStart;
+uniform float uFogEnd;
+uniform vec4 uFogColor;
+
+
+float getFogFactor(float distance) {
+    if (distance >= uFogEnd) {
+        return 0.0f;
+    }
+    if (distance <= uFogStart) {
+        return 1.0f;
+    }
+
+    // ToDo: Exponential fog
+    return (uFogEnd - distance) / (uFogEnd - uFogStart);
+}
+
+    #endif
+
+
+void main() {
+    work();
+
+    #ifdef POSTPROCESSING_FOG
+    float fogFactor = getFogFactor(distance(uCameraPosition, finVertexPosition));
+
+    if (fogFactor != 1.0f) {
+        outColor = vec4(mix(uFogColor.rgb, outColor.rgb, fogFactor), outColor.a);
+    };
+    #endif
+}

src/main/resources/assets/minosoft/rendering/shader/includes/postprocessing/vertex.glsl

@@ -0,0 +1,19 @@
+/*
+ * 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.
+ */
+
+out vec3 finVertexPosition;
+
+void main() {
+    work();
+    finVertexPosition = vinPosition;
+}

src/main/resources/assets/minosoft/rendering/shader/sky/skybox/sky_skybox.vsh

@@ -19,15 +19,10 @@ out vec4 finColor;
 
 uniform mat4 uSkyViewProjectionMatrix;
 
-uniform vec4 uBottomColor;
-uniform vec4 uTopColor;
+uniform vec4 uSkyColor;
 
 void main() {
     gl_Position = (uSkyViewProjectionMatrix * vec4(vinPosition, 1.0)).xyww;
 
-    if (vinPosition.y < 0.5f) {
-        finColor = uBottomColor;
-    } else {
-        finColor = uTopColor;
-    }
+    finColor = uSkyColor;
 }

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

@@ -23,9 +23,11 @@ in float finInterpolation;
 
 in vec4 finTintColor;
 
+#define POSTPROCESSING_FOG
+
 #include "minosoft:texture"
 
-void main() {
+void work() {
     vec4 firstTexelColor = getTexture(finTextureIndex1, finTextureCoordinates1);
     if (firstTexelColor.a == 0.0f) {
         discard;
@@ -44,3 +46,5 @@ void main() {
 
     outColor = mix(firstTexelColor, secondTexelColor, finInterpolation) * finTintColor;
 }
+
+    #include "minosoft:postprocessing/fragment"

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

@@ -31,14 +31,13 @@ out vec4 finTintColor;
 
 uniform mat4 uViewProjectionMatrix;
 
+#define POSTPROCESSING_FOG
 
 #include "minosoft:animation"
-
 #include "minosoft:color"
-
 #include "minosoft:light"
 
-void main() {
+void work() {
     gl_Position = uViewProjectionMatrix * vec4(vinPosition, 1.0f);
     finTintColor = getRGBColor(vinTintColor) * getLight(vinLight);
 
@@ -65,3 +64,5 @@ void main() {
 
     finInterpolation = interpolation / 100.0f;
 }
+
+    #include "minosoft:postprocessing/vertex"