From dc3517eb3ae0fca1e962a58c945d35bbf2469144 Mon Sep 17 00:00:00 2001
From: JozsefA <jozsefaug@gmail.com>
Date: Fri, 30 Apr 2021 14:28:18 -0700
Subject: [PATCH] Inversion

---
 .../curiosities/projector/ChromaticProjectorScreen.java       | 2 +-
 .../foundation/render/backend/effects/FilterSphere.java       | 4 ++--
 .../resources/assets/create/flywheel/shaders/area_effect.frag | 4 +++-
 3 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/main/java/com/simibubi/create/content/curiosities/projector/ChromaticProjectorScreen.java b/src/main/java/com/simibubi/create/content/curiosities/projector/ChromaticProjectorScreen.java
index 076bf77a7..ee0620239 100644
--- a/src/main/java/com/simibubi/create/content/curiosities/projector/ChromaticProjectorScreen.java
+++ b/src/main/java/com/simibubi/create/content/curiosities/projector/ChromaticProjectorScreen.java
@@ -107,7 +107,7 @@ public class ChromaticProjectorScreen extends AbstractSimiScreen {
 				.titled(Lang.translate("gui.chromatic_projector.strength"))
 				.withStepFunction(ctx -> step(ctx, 5))
 				.calling(tile::setStrength)
-				.withRange(0, 101)
+				.withRange(-100, 101)
 				.setState((int) (tile.strength * 100));
 
 		Collections.addAll(widgets, blend, rChannel, gChannel, bChannel, fieldEffect, strength);
diff --git a/src/main/java/com/simibubi/create/foundation/render/backend/effects/FilterSphere.java b/src/main/java/com/simibubi/create/foundation/render/backend/effects/FilterSphere.java
index 0b6d4f881..91499610f 100644
--- a/src/main/java/com/simibubi/create/foundation/render/backend/effects/FilterSphere.java
+++ b/src/main/java/com/simibubi/create/foundation/render/backend/effects/FilterSphere.java
@@ -41,8 +41,8 @@ public class FilterSphere {
 
 				surface ? 1 : 0,
 				field ? 1 : 0,
-				strength,
-				0,        // padding
+				Math.abs(strength),
+				strength < 0 ? 1 : 0,
 
 				rMask ? 1 : 0,
 				gMask ? 1 : 0,
diff --git a/src/main/resources/assets/create/flywheel/shaders/area_effect.frag b/src/main/resources/assets/create/flywheel/shaders/area_effect.frag
index 86e987ecc..e2e99fc66 100644
--- a/src/main/resources/assets/create/flywheel/shaders/area_effect.frag
+++ b/src/main/resources/assets/create/flywheel/shaders/area_effect.frag
@@ -17,7 +17,7 @@ uniform vec3 uCameraPos;
 struct SphereFilter {
     vec4 sphere;// <vec3 position, float radius>
     vec4 d1;// <float feather, float fade, float density, float blend mode>
-    vec4 strength;// <float surfaceStrength, float bubbleStrength, float strength>
+    vec4 strength;// <float surfaceStrength, float bubbleStrength, float strength, float invert>
     vec4 channelMask;// <vec3 rgb>
     mat4 colorOp;
 };
@@ -126,6 +126,8 @@ vec3 applyFilters(vec3 worldDir, float depth, vec3 diffuse) {
 
         float strength = filterStrength(worldDir, depth, s);
 
+        strength = invert(strength, s.strength.w);
+
         if (strength > 0) {
             const float fcon = 0.;