Block to combine with a solid colour using standard blend modes

Editor/Blocks/Color/ColorBlend.cs

@@ -0,0 +1,100 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace UnityEditor.VFX.Block
+{
+    [VFXInfo(category = "Color")]
+    class ColorBlend : VFXBlock
+    {
+
+        public enum BlendMode
+        {
+            Darken,
+            Multiply,
+            ColorBurn,
+            LinearBurn,
+            Lighten,
+            Screen,
+            ColorDodge,
+            LinearDodge,
+            Overlay,
+            SoftLight,
+            HardLight,
+            VividLight,
+            LinearLight,
+            PinLight,
+            Difference,
+            Exclusion
+        }
+
+        [SerializeField, VFXSetting, Tooltip("The blend mode to use")]
+        private BlendMode blendMode = BlendMode.Screen;
+
+        public override string name {get{return "Color Blend";}}
+        public override VFXContextType compatibleContexts {get{return VFXContextType.kInitAndUpdateAndOutput;}}
+        public override VFXDataType compatibleData {get{return VFXDataType.kParticle;}}
+
+        public class InputProperties
+        {
+            public Color blendColor;
+        }
+
+
+
+        public override IEnumerable<VFXAttributeInfo> attributes
+        {
+            get
+            {
+                yield return new VFXAttributeInfo(VFXAttribute.Color, VFXAttributeMode.ReadWrite);
+            }
+        }
+
+
+        public override string source
+        {
+            get
+            {
+                switch (blendMode)
+                {
+                    case BlendMode.Darken:
+                        return @"color = min(blendColor,color);";
+                    case BlendMode.Multiply:
+                        return @"color = blendColor * color;";
+                    case BlendMode.ColorBurn:
+                        return @"color = 1.0 - (1.0-blendColor) / color;";
+                    case BlendMode.LinearBurn:
+                        return @"color = blendColor + color - 1.0;";
+                    case BlendMode.Lighten:
+                        return @"color = max(blendColor,color);";
+                    case BlendMode.Screen:
+                        return @"color = 1.0 - (1.0-blendColor) * (1.0-color);";
+                    case BlendMode.ColorDodge:
+                        return @"color = blendColor / (1.0-color);";
+                    case BlendMode.LinearDodge:
+                        return @"color = blendColor + color;";
+                    case BlendMode.Overlay:
+                        return @"color = (blendColor > 0.5) * (1.0 - (1.0-2.0*(blendColor-0.5)) * (1.0-color)) + (blendColor <= 0.5) * ((2.0*blendColor) * color);";
+                    case BlendMode.SoftLight:
+                        return @"color = (color > 0.5) * (1.0 - (1.0-blendColor) * (1.0-(color-0.5))) + (color <= 0.5) * (blendColor * (color+0.5));";
+                    case BlendMode.HardLight:
+                        return @"color = (color > 0.5) * (1.0 - (1.0-blendColor) * (1.0-2.0*(color-0.5))) +  (color <= 0.5) * (blendColor * (2.0*color));";
+                    case BlendMode.VividLight:
+                        return @"color = (color > 0.5) * (1.0 - (1.0-blendColor) / (2.0*(color-0.5))) + (color <= 0.5) * (blendColor / (1.0-2.0*color));";
+                    case BlendMode.LinearLight:
+                        return @"color = (color > 0.5) * (blendColor + 2.0*(color-0.5)) +  (color <= 0.5) * (blendColor + 2.0*color - 1.0);";
+                    case BlendMode.PinLight:
+                        return @"color = (color > 0.5) * (max(blendColor,2.0*(color-0.5))) +  (color <= 0.5) * (min(blendColor,2.0*color));";
+                    case BlendMode.Difference:
+                        return @"color = abs(blendColor - color);";
+                    case BlendMode.Exclusion:
+                        return @"color = 0.5 - 2.0*(blendColor-0.5)*(color-0.5);";
+                    default:
+                        return "";
+                }
+            }
+        }
+    }
+
+}
+

README.md

@@ -1,64 +1,16 @@
 # Visual Effect Graph - Extras
 
-Raw bunch of featre prototypes for use with Visual Effect Graph. Some probably broken, totally non-official and unsupported by Unity. Use at your own risk.
+I forked https://github.com/peeweek/net.peeweek.vfxgraph-extras/ to allow me to easily experiment with my own custom blocks and nodes.
 
-## Features
-* Initial State (MonoBehaviour) : Enables the effect to start in a Stopped State.
-* Blocks
-  * GPU Event : Spawn Rate (Over time or distance)
-  * Custom Code Block
-  * Position on Terrain
-* Contexts
-  * Distortion Quad (HDRP)
-* Operators
-  * Get Spawn Count
-  * Get Spawn Time (used with SetSpawnTime custom spawner)
-* Custom Spawners
-  * Set Spawn Time
-  * Count over Time
-* VFX Volume Mixer
-  * Volume Component to set up to 8 float, 8 vector3 and 8 colors
-  * Preferences to set the counts and names of every float, vector3 and color by project
-  * Parameter Binder for every property
-* Parameter Binders
-  * Audio Spectrum to Map
-  * GameObject 
-     * Hierarchy Attribute Map
-     * Velocity
-     * Previous Position
-  * Input
-     * Axis
-     * Button
-     * Mouse
-     * Keyboard
-     * Touch
-  * Terrain
-  * UI
-    * Toggle
-    * Slider
-
-## Requirements
-
-* Unity 2018.3
-* Latest 4.x VisualEffectGraph package
-* Latest 4.x HD Render Pipeline package
-
-## Install
-
-You can use a manual, local package installation if you need to alter the code locally or automate the fetch of the repository by using a git adress directly. The latter option shall download and manage automatically the repository, with the drawback of being read-only.
-
-### Manual Version
-
-* Clone repository somewhere of your liking
-* Make sure your project is correctly configured with both HDRP and VFX Graph at correct revisions 
-* In your project, open the `Window/Package Manager` window and use the + button to select the `Add Package from Disk...` option.
-* Navigate to your repository folder and select the `package.json` file
-* The repository shall be added
+See https://github.com/peeweek/net.peeweek.vfxgraph-extras/blob/master/README.md for the original notes. The last bit of the installation differs thus (updated urls and package names):
 
 ### Git reference version
 
 * Make sure your project is correctly configured with both HDRP and VFX Graph at correct revisions 
 * With unity closed, edit the `Packages/manifest.json` with a text editor
-* append the line `    "net.peeweek.vfxgraph-extras": "https://github.com/peeweek/net.peeweek.vfxgraph-extras.git",` under `dependencies`
+* append the line `    "net.ixxy.vfxgraph-extras": "https://github.com/IxxyXR/net.ixxy.vfxgraph-extras.git",` under `dependencies`
+
 
+### Additions:
 
+Currently just a new block "Color/Color Blend" which supports Photoshop style blend modes.

package.json

@@ -1,7 +1,7 @@
 {
-    "name": "net.peeweek.vfxgraph-extras",
-    "displayName": "Visual Effect Graph (Extras)",
+    "name": "net.ixxy.vfxgraph-extras",
+    "displayName": "Ixxy Visual Effect Graph (Extras)",
     "version": "0.0.1",
     "unity": "2018.3",
     "description": "Visual Effect Graph (Extras)"
-}
+}