About polygonExample

Learning Objectives

This Example demonstrates various methods of working with polygon shapes and vertices.

This example covers the following functions:

• Different vertex types such as ofVertex, ofCurveVertex, ofBezierVertex
• Poly winding types using ofSetPolyMode
• Polygon building with ofBeginShape, ofEndShape, and ofNextContour

In the code, pay attention to:

• Different arguments for setting the poly winding type, such as ofSetPolyMode(OF_POLY_WINDING_NONZERO) and ofSetPolyMode(OF_POLY_WINDING_ODD).
• Methods for making closed and open polygons, using ofEndShape() and ofEndShape(OF_CLOSE)
• Use of the struct draggableVertex in the ofApp.h
• Changing colors with ofSetHexColor()
• Creating holes and constructive geometries with ofNextContour()
• Toggling of shape fills, with ofFill() and ofNoFill();.
• Rendering bitmap text to the screen, with ofDrawBitmapString().

Expected Behavior

When launching this app, you should see a screen with

• 9 differently colored polygon shapes labeled (a) through (i)
• Some bitmap text underneath each polygon shape

Instructions for use:

• Drag the vertex points of the ofCurveVertex polygon (f) to adjust its size.

Other classes used in this file

This Example uses no other classes.