PShader / Reference / Processing.org

Class Name

PShader

Description

This class encapsulates a GLSL shader program, including a vertex and a fragment shader. It is compatible with P2D and P3D, but not with the default renderer. Use the loadShader() function to load your shader code. Note: It's strongly encouraged to use loadShader() to create a PShader object, rather than calling the PShader constructor manually.

Examples

PShader blur;

void setup() {
  size(640, 360, P2D);
  // Shaders files must be in the "data" folder to load correctly
  blur = loadShader("blur.glsl"); 
  stroke(0, 102, 153);
  rectMode(CENTER);
}

void draw() {
  filter(blur);  
  rect(mouseX-75, mouseY, 150, 150); 
  ellipse(mouseX+75, mouseY, 150, 150);
}

PImage tex;
PShader deform;

void setup() {
  size(640, 360, P2D);
  tex = loadImage("tex1.jpg");
  deform = loadShader("deform.glsl");
  deform.set("resolution", float(width), float(height));
}

void draw() {
  deform.set("time", millis() / 1000.0);
  deform.set("mouse", float(mouseX), float(mouseY));
  shader(deform);
  image(tex, 0, 0, width, height);
}

Constructors

PShader()
PShader(parent)
PShader(parent, vertFilename, fragFilename)
PShader(parent, vertURL, fragURL)
PShader(parent, vertSource, fragSource)

Parameters

parentthe parent program
vertFilenamename of the vertex shader
fragFilenamename of the fragment shader
vertURLnetwork location of the vertex shader
fragURLnetwork location of the fragment shader

Methods

set()Sets a variable within the shader

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.