Demo Number 3

• Makefile
• Spiral.C
• Spiral.h
• UI.C
• UI.h
• triangles.C
• triangles.frag
• triangles.vert

Major changes

• Vertex shader is radically different.
  • Generates colors based on the distance from the origin and the quadrant of the the original point.
  • Spin the entire figure based on an uniform angle variable.
The fragment shader uses the colors generated in the vertex shader
• The Spiral class has several new member functions
  • A toggle display function, you can turn drawing off.
  • A NextTheta function to increment theta
• The Spiral class also
  • Now needs the program so it can use the uniform variable theta
• The UI class now
  • Allows the user to turn the display of the hex and spiral on and off
  • Starts and end animation
    • This just uses the glutIdleFunc
    • This is not the best way to animate, as it will not be "regular"
    • But it will do for now.
• The main routine has been changed to allow the hex to be turned on and off.