rendering: fix sun invisible bug when time == 6000t

ReadMe.md

@@ -85,7 +85,6 @@ See [Credits](Credits.md).
 ## Releases and beta
 
 No clue, but still waiting for !21. Also, some features need to be implemented, so not soo soon (but we are getting closer). If you want to get notified about cool new changes, feel free to subscribe to our dev news telegram channel [@MinosoftDevNews]((https://t.me/MinosoftDevNews))
-
 ## Compiling and running
 
 1. Install Maven and java 15 (On Ubuntu based distributions: `sudo apt install maven openjdk-15-jdk`).

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

@@ -77,7 +77,12 @@ class SkyRenderer(
 
     private fun setSunMatrix(projectionViewMatrix: Mat4) {
         val timeAngle = (getSkyAngle(connection.world.time).toFloat() * 360.0f)
-        skySunShader.use().setMat4("skyViewProjectionMatrix", projectionViewMatrix.rotate(timeAngle, Vec3(0.0f, 0.0f, 1.0f))) // ToDo: 180° is top, not correct yet
+        val rotatedMatrix = if (timeAngle == 0.0f) {
+            projectionViewMatrix
+        } else {
+            projectionViewMatrix.rotate(timeAngle, Vec3(0.0f, 0.0f, 1.0f))
+        }
+        skySunShader.use().setMat4("skyViewProjectionMatrix", rotatedMatrix) // ToDo: 180° is top, not correct yet
     }
 
     override fun postInit() {
@@ -103,7 +108,7 @@ class SkyRenderer(
                 start = Vec3(-0.15f, 1.0f, -0.15f),
                 end = Vec3(+0.15f, 1.0f, +0.15f),
                 texture = sunTexture,
-                tintColor = RGBColor(255, 255, 255),
+                tintColor = RGBColor(255, 255, 255), // ToDo: Depends on time
             )
             skySunMesh.load()
         }