If you were comparing two colors in the real world, you’d first think about their Hue. You may never have realized it, but HSV fits really well into how we think about colors, which is why color pickers are generally built around HSV, not RGB. While wikipedia has a good visualization of how all three aspects interact, I prefer a simpler mental mode. To understand the how and why of using HSV, we need a brief intro to what it is. Even the final value returned from a fragment shader is done in RGBA (red, green, blue, alpha). That’s how color data is stored-in and passed-through any shader.
#Shift shader 2.0 code#
If you’ve been working with shaders and game code for a while, you should be pretty familiar with RGB. Please reply to the YouTube video, or ping me on Twitter with any comments or questions. The content in the video is from Gaia 2 and this free dragon. The butterfly in the title image and screenshots below was from the asset store here. Please read the disclaimer for more information. So if following along with samples, it’s likely better to use their nodes than mine.įor those moving from Amplify, it has the two raw nodes, and leaves a hue-shift operation up to the user to implement This article may contain affiliate links, mistakes, or bad puns. This covers the majority of HSV needs, so it’s understandable that they didn’t provide nodes giving you raw access to all the HSV values. Edit: Unity does provide a node to do this conversion. It does RGB to HSV, adjusts the hue, then converts back, all internal to the node. Unity’s shader graph includes one node called Hue. The video, on the other hand, covers this math at a higher level, and primarily focuses on examples of using the HSV nodes. Note that the written article below focuses primarily on the HSV math and graph. The resulting nodes are available on github here. This article has a matching video you YouTube you can find here.
#Shift shader 2.0 how to#
This tutorial will go through how to make HSV shader graph nodes to convert between the two, and why you would want to. Second to that is HSV – Hue, Saturation, Value. In computer graphics, RGB is by far the most common – Red, Green Blue.
There are a number of ways to mathematically represent a color.