From 155c38536f1d1a7272366436970b220f0b724695 Mon Sep 17 00:00:00 2001
From: minjaesong <alswo9628@gmail.com>
Date: Sat, 27 Jul 2019 14:45:19 +0900
Subject: [PATCH] correct impl for RNG of joise lib

---
 lib/Terrarum_Joise.jar                        | Bin 313692 -> 313459 bytes
 .../worldgenerator/WorldGenerator.kt          |  30 +++++++++++-----
 src/net/torvald/terrarum/tests/RNGTest.kt     |  32 ++++++++++++++++++
 .../terrarum/worlddrawer/WorldCamera.kt       |   6 +++-
 4 files changed, 58 insertions(+), 10 deletions(-)
 create mode 100644 src/net/torvald/terrarum/tests/RNGTest.kt

diff --git a/lib/Terrarum_Joise.jar b/lib/Terrarum_Joise.jar
index f0ed0d0d810d7c6c5d7421827802549ae514194a..ecef95babe80013efda38813a24ba91a0c2255e0 100644
GIT binary patch
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diff --git a/src/net/torvald/terrarum/modulebasegame/worldgenerator/WorldGenerator.kt b/src/net/torvald/terrarum/modulebasegame/worldgenerator/WorldGenerator.kt
index 0909023fe..d2dd174d9 100644
--- a/src/net/torvald/terrarum/modulebasegame/worldgenerator/WorldGenerator.kt
+++ b/src/net/torvald/terrarum/modulebasegame/worldgenerator/WorldGenerator.kt
@@ -201,7 +201,7 @@ object WorldGenerator {
         ridged.setAllSourceInterpolationTypes(ModuleBasisFunction.InterpolationType.QUINTIC)
         ridged.setNumOctaves(4)
         ridged.setFrequency(1.0)
-        ridged.seed = SEED xor random.nextLong()
+        ridged.seed = SEED shake random.nextLong()
 
         val ridged_autocorrect = ModuleAutoCorrect()
         ridged_autocorrect.setRange(0.0, 1.0)
@@ -228,7 +228,7 @@ object WorldGenerator {
         cave_shape.setAllSourceInterpolationTypes(ModuleBasisFunction.InterpolationType.QUINTIC)
         cave_shape.setNumOctaves(1)
         cave_shape.setFrequency(4.0)
-        cave_shape.seed = SEED xor caveMagic
+        cave_shape.seed = SEED shake caveMagic
 
         val cave_select = ModuleSelect()
         cave_select.setLowSource(1.0)
@@ -243,7 +243,7 @@ object WorldGenerator {
         cave_perturb_fractal.setAllSourceInterpolationTypes(ModuleBasisFunction.InterpolationType.QUINTIC)
         cave_perturb_fractal.setNumOctaves(6)
         cave_perturb_fractal.setFrequency(3.0)
-        cave_perturb_fractal.seed = SEED xor cavePerturbMagic
+        cave_perturb_fractal.seed = SEED shake cavePerturbMagic
 
         val cave_perturb_scale = ModuleScaleOffset()
         cave_perturb_scale.setSource(cave_perturb_fractal)
@@ -271,7 +271,7 @@ object WorldGenerator {
         ridged.setAllSourceInterpolationTypes(ModuleBasisFunction.InterpolationType.QUINTIC)
         ridged.setNumOctaves(2)
         ridged.setFrequency(frequency)
-        ridged.seed = SEED xor ridgedMagic
+        ridged.seed = SEED shake ridgedMagic
 
         val brownian_select = ModuleSelect()
         brownian_select.setControlSource(ridged)
@@ -370,7 +370,7 @@ object WorldGenerator {
         lowland_shape_fractal.setAllSourceInterpolationTypes(ModuleBasisFunction.InterpolationType.QUINTIC)
         lowland_shape_fractal.setNumOctaves(2)
         lowland_shape_fractal.setFrequency(1.0)
-        lowland_shape_fractal.seed = SEED xor lowlandMagic
+        lowland_shape_fractal.seed = SEED shake lowlandMagic
 
         val lowland_autocorrect = ModuleAutoCorrect()
         lowland_autocorrect.setSource(lowland_shape_fractal)
@@ -399,7 +399,7 @@ object WorldGenerator {
         highland_shape_fractal.setAllSourceInterpolationTypes(ModuleBasisFunction.InterpolationType.QUINTIC)
         highland_shape_fractal.setNumOctaves(2)
         highland_shape_fractal.setFrequency(2.0)
-        highland_shape_fractal.seed = SEED xor highlandMagic
+        highland_shape_fractal.seed = SEED shake highlandMagic
 
         val highland_autocorrect = ModuleAutoCorrect()
         highland_autocorrect.setSource(highland_shape_fractal)
@@ -428,7 +428,7 @@ object WorldGenerator {
         mountain_shape_fractal.setAllSourceInterpolationTypes(ModuleBasisFunction.InterpolationType.QUINTIC)
         mountain_shape_fractal.setNumOctaves(4)
         mountain_shape_fractal.setFrequency(1.0)
-        mountain_shape_fractal.seed = SEED xor mountainMagic
+        mountain_shape_fractal.seed = SEED shake mountainMagic
 
         val mountain_autocorrect = ModuleAutoCorrect()
         mountain_autocorrect.setSource(mountain_shape_fractal)
@@ -457,7 +457,7 @@ object WorldGenerator {
         terrain_type_fractal.setAllSourceInterpolationTypes(ModuleBasisFunction.InterpolationType.QUINTIC)
         terrain_type_fractal.setNumOctaves(3)
         terrain_type_fractal.setFrequency(0.5)
-        terrain_type_fractal.seed = SEED xor selectionMagic
+        terrain_type_fractal.seed = SEED shake selectionMagic
 
         val terrain_autocorrect = ModuleAutoCorrect()
         terrain_autocorrect.setSource(terrain_type_fractal)
@@ -898,7 +898,7 @@ object WorldGenerator {
                 Block.SAND_WHITE, Block.SAND_WHITE, Block.SAND_WHITE,
                 Block.SAND_BLACK, Block.SAND_BLACK, Block.SAND_GREEN
                 )
-        val thisRand = HQRNG(SEED xor random.nextLong())
+        val thisRand = HQRNG(SEED shake random.nextLong())
         val thisSand = thisSandList[thisRand.nextInt(thisSandList.size)]
         // val thisSand = Block.SAND_GREEN
 
@@ -1030,4 +1030,16 @@ object WorldGenerator {
                            var filter: NoiseFilter = NoiseFilterQuadratic,
                            var filterArg1: Double = NOISE_GRAD_START,
                            var filterArg2: Double = NOISE_GRAD_END)
+
+    // identical to te HQRNG's implementation
+    private infix fun Long.shake(other: Long): Long {
+        var s0 = this
+        var s1 = other
+
+        s1 = s1 xor s0
+        s0 = s0 shl 55 or s0.ushr(9) xor s1 xor (s1 shl 14)
+        s1 = s1 shl 36 or s1.ushr(28)
+
+        return s0 + s1
+    }
 }
\ No newline at end of file
diff --git a/src/net/torvald/terrarum/tests/RNGTest.kt b/src/net/torvald/terrarum/tests/RNGTest.kt
new file mode 100644
index 000000000..51270e707
--- /dev/null
+++ b/src/net/torvald/terrarum/tests/RNGTest.kt
@@ -0,0 +1,32 @@
+package net.torvald.terrarum.tests
+
+import net.torvald.random.HQRNG
+import java.util.*
+
+/**
+ * Created by minjaesong on 2019-07-27.
+ */
+
+fun rng01(rng: Random): Double {
+    return (rng.nextInt().toDouble() / 4294967295L.toDouble())
+}
+
+fun main(args: Array<String>) {
+    val rng = HQRNG()
+
+    /*repeat(512) {
+        println(rng.nextDouble())
+    }*/
+
+    println()
+
+    val rng2 = com.sudoplay.joise.generator.HQRNG()
+
+    repeat(512) {
+        println(rng2.getRange(0, 10))
+    }
+
+    // getTarget: 0..(t-1) (exclusive)
+    // getRange: low..high (inclusive)
+    // get01: 0.0 until 1.0 (exclusive)
+}
diff --git a/src/net/torvald/terrarum/worlddrawer/WorldCamera.kt b/src/net/torvald/terrarum/worlddrawer/WorldCamera.kt
index 3cf8a0e62..a78094345 100644
--- a/src/net/torvald/terrarum/worlddrawer/WorldCamera.kt
+++ b/src/net/torvald/terrarum/worlddrawer/WorldCamera.kt
@@ -4,6 +4,7 @@ import com.jme3.math.FastMath
 import net.torvald.terrarum.AppLoader
 import net.torvald.terrarum.Terrarum
 import net.torvald.terrarum.floorInt
+import net.torvald.terrarum.gameactors.ActorWBMovable
 import net.torvald.terrarum.gameactors.ActorWithBody
 import net.torvald.terrarum.gameworld.GameWorld
 import org.dyn4j.geometry.Vector2
@@ -47,7 +48,10 @@ object WorldCamera {
 
         // some hacky equation to position player at the dead centre
         // implementing the "lag behind" camera the right way
-        val pVecSum = Vector2(0.0, 0.0)//player.externalV + (player.controllerV ?: nullVec)
+        val pVecSum = if (player is ActorWBMovable)
+            player.externalV + (player.controllerV ?: nullVec)
+        else
+            nullVec
 
         x = ((player.hitbox.centeredX - pVecSum.x).toFloat() - (width / 2)).floorInt() // X only: ROUNDWORLD implementation