OceanodeGLSL

A collection of GLSL fragment shader effects for Oceanode via ofxOceanodeTextures.

How it works

Each .glsl file in Effects/ is automatically registered as an Oceanode node at startup by ofxOceanodeTextures. The node name is the filename (without .glsl), and all parameters are declared in the first line of the file as a comment:

//ParamName:defaultValue:minValue:maxValue, Param2:default:min:max, ...

Parameter types

Syntax	Type	Shader uniform
Name:default:min:max	Float knob	uniform float Name + uniform sampler2D NameTex
Name:color	Color picker	uniform vec4 Name
Name:texture	Texture input	uniform sampler2D Name

Every float parameter also accepts a texture patch via its NameTex port for per-pixel modulation.

Every node also has a Bypass toggle and a Draw On Event inspector option built in.

Installation

Copy the contents of Effects/ into the bin/data/Effects/ folder of your Oceanode application. Restart the app — the new nodes will appear in the Effects category.

Shaders

File	Description
AngleColor.glsl	Polar angle map from a configurable center, with radius and decay blending
Binarize.glsl	Binarizes the input to black/white with threshold; optional mask modes
BlurTrail.glsl	Horizontal Gaussian blur (incremental weighted variant)
BlurTrail2.glsl	Horizontal Gaussian blur (direct per-sample variant)
CircularGradient.glsl	Radial luminosity gradient with position and scale control
CircularGradient Extended.glsl	Radial gradient with per-pixel angle output and border decay
CircularGradientEx2.glsl	Extended radial gradient with angle offset, radius and soft border
CircularGradientEx3.glsl	Dual-scale radial gradient with independent size axes for luma and angle
ColorBalance.glsl	Independent RGB channel gain multipliers
Grayscale.glsl	BT.709 grayscale conversion with brightness, contrast and gamma controls
HSLFilter.glsl	Hue shift, saturation and lightness control via HSV color space
Invert.glsl	Color inversion with a continuous blend parameter
Levels.glsl	Input/output levels remapping with gamma correction
Luma.glsl	Luminance threshold with smoothstep soft edge
Overflow.glsl	Wraps values past 1.0 using modulo, with a multiplier
Test.glsl	Simple opacity/brightness multiplier (development utility)
WorkingSpectrogram.glsl	Scrolling spectrogram: shifts texture left each frame, feeds new column from a second texture
columnHistogram.glsl	Scrolling histogram: shifts texture left each frame, copies a specified column
diagonalBendStretch.glsl	Diagonal band distortion with configurable bend angle and slope
metaballs.glsl	Animated metaballs generator (uses a time uniform)