About Gaussian Blue Filter Example

Learning Objectives

This openFrameworks example demonstrates how to apply a gaussian blur filter to an image in multiple passes.

• Use of shaderBlurX and shaderBlurY, two ofShader objects
• Use of fboBlurOnePass and fboBlurTwoPass, two [ofFbo] (http://openframeworks.cc/documentation/gl/ofFbo/) objects use as offscreen rendering containers
• Blur amount deteremined by position of the mouse: float blur = ofMap(mouseX, 0, ofGetWidth(), 0, 10, true);
• Use of shaderBlurX.setUniform1f("blurAmnt", blur); to the set the horizontal blur amount
• Use of shaderBlurY.setUniform1f("blurAmnt", blur); to the set the vertical blur amount

Expected Behavior

When launching this application, you will see a brightly patterned image.

Instructions for use:

• Move the mouse on the horizon to see the increase the blur amount

Other classes used in this file

No other classes were used for this example.