Has it occurred to you to try with other shapes? This method seems applicable to any situation where you want to place a template shape in perspective. With a little sewing and some fishing line, you could also locate centrepoints or other dividers. I can imagine this being quite useful for things like buildings.
With a piece of clear plastic, you could generalize it further so you can simply draw a plan view on the plastic and rotate it to project it. I'm definitely going to try that.
I think the stability probably needs work though.. maybe adding two wires could help this?
On a separate topic:
I've posted about Harold Speed before, but I think these especially deserve highlighting:
James Gurney's review/synopsis of Speed's 'practice and science of drawing'. Chapter 18 here
and Chapter 19 here
Speed strongly emphasizes the importance of memory, especially in these chapters. He connects this to intentionality:
- "It is seldom if ever that an artist puts on paper anything better than he has in his mind before he starts, and usually it is not nearly so good."
- "To know what you want to do and then to do it is the secret of good style and technique."
- "Look well at the model first; try and be moved by something in the form that you feel is fine or interesting, and try and see in your mind's eye what sort of drawing you mean to do before touching your paper."
Intentionality is also generally emphasized:
- * "It is much easier to put down a statement correctly than to correct a wrong one; so out with the whole part if you are convinced it is wrong."
- * "Try and express yourself in as simple, not as complicated a manner as possible."
This echoes in some ways thoughts that I have had, about the importance of cultivating short term memory, so that you can maintain awareness of many reference points and keep the picture accurate 'in your head' (thereby more easily attaining the goal of making the picture you actually draw accurate)
The practice of memory drawing also forces
you to cultivate intentionality, since you cannot simply 'draw what is in front of you'. You cannot not-decide what is important when drawing from memory.