This is a group project (2 or 3). If you would like to work alone, please contact your teacher.

1. Research a structure found on a castle from any era of human history, such as turrets, crenellations, spiral starcases, arches, arrow loops, windows, buttresses, ramparts, etc. Write a few context paragraphs describing the structure and purpose of that part of a castle. Please include the time period, brief history, and geographic location of that type of castle. You may use a fortress structure from any part of the world.
2. Plan your project. Create an annotated sketch of your component. Please use isometric paper unless blank paper would be a better choice. Digital ink is OK.
3. Build your OpenSCAD design. Use inline comments to annotate your code.
4. Submission: Word document containing the following.
   
   1. Title of your project and your name
   2. Context paragraphs
   3. Your annotated sketch
   4. A screenshot (snip) of your OpenSCAD structure.
   5. Your code (annotated)

OpenSCAD

• Download
• Turret Example

OpenSCAD Example Code:

difference(){ //subtracts the second part from the first
 color("Peru")cylinder(h=20, r=10, center=false);//first part, main walls
 union(){//parts to subtract
   for(i=[1:1:3]){ //loop produces crenellations
     rotate([0,0,i*120])translate([0,0,19])cube([21,3,3], center=true);
   }
 translate([0,0,15])cylinder(h=6, r=8, center=false); //inset subtracted cylinder
 }
}

Resources

• http://medievalcastles.stormthecastle.com/parts-of-a-medieval-castle.htm
• Built to Last - Macaulay
• Secrets of the Castle
• Isometric Drawing Examples: arrow-loop.pdf, spiral-staircase.pdf, inner-curtain.pdf