2D drawing
The basic drawing functions are the following (see Chapter 2, Creating Your First openFrameworks Project, for details):
Example of function usage 
Description 


This sets the background to the white color. 

The 

The 

This draws a line segment connecting the points (100, 200) and (300, 400). 

This draws a rectangle with the topleft corner (100, 200), a width of 300 pixels, and a height of 400 pixels. The 

This draws a triangle with the vertices (10, 20), (30, 40), and (50, 60). 

This draws a circle with the center (100, 200) and a radius of 30. The 

This enables the mode for drawing filled figures. 

This enables the mode for drawing unfilled figures. 

This sets the drawing color with a red value of 100, a green value of 150, and a blue value of 200. 

This sets the drawing color with the red, green, and blue values equal to 255 and the alpha value equal to 200. To enable additive blending, use the To enable alpha blending back, use the 

This sets the yellow drawing color. 

This stores the current coordinate system to a special stack. 

This restores the coordinate system from the stack. 

This translates the coordinate system by (200, 100) pixels. 

This rotates the coordinate system by 90 degrees clockwise. 

This scales the coordinate system; all objects will grow bigger by two times. 