08-16-2018, 08:04 AM
I imagine you can draw a circle one line at a time by stopping and starting drawing at the right point for each line. Perhaps the SNES had this level of control per line?
Ah yes I know the Super Mario World transition you're talking about - and they have a "keyhole" one as well for the secret levels. The key hole silhouette could also be drawn by starting and stopping once per line - the shape has no "concave" areas... I think this isn't a coincidence...
Well anyway - I suppose I could use SDL to draw on top of the screen after Tilengine has drawn, to fake any effects like this!
Ah yes I know the Super Mario World transition you're talking about - and they have a "keyhole" one as well for the secret levels. The key hole silhouette could also be drawn by starting and stopping once per line - the shape has no "concave" areas... I think this isn't a coincidence...
Well anyway - I suppose I could use SDL to draw on top of the screen after Tilengine has drawn, to fake any effects like this!