I rented a projector so I could find answers to some of the questions I had about projecting onto the floor, mainly:
Does the texture or colour of the ground interfere with the image?
Are shadows a problem?
I placed the projector on a shelf and used a mirror to direct the image onto the ground. Projectors aren’t meant to be pointed straight down, so helps to keep the projector alive while easily getting the needed angle. While testing my grad project, I found that the image is easiest to read on a flat surface and the colours are best when projected onto a white background. This is something to consider while designing for the grey cement floors at Emily Carr. The area I was working with was too small to come up with an accurate answer as to how the shadow will affect the projection, but I think as long as the mirror is parallel to the floor, shadows shouldn’t be a problem.
These videos show projects that have effectively projected interactive installations onto the ground, with minimal shadow interference.