From bb569529c449d719048b96ec08d2de0b13beb7b7 Mon Sep 17 00:00:00 2001 From: Andy McFadden Date: Mon, 31 Aug 2015 13:34:00 -0700 Subject: [PATCH] Update manual.md --- docs/manual.md | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/docs/manual.md b/docs/manual.md index 8bd8037..a370524 100644 --- a/docs/manual.md +++ b/docs/manual.md @@ -584,6 +584,12 @@ The rendering of filled circles is very fast, though there is a possibility of optimizing the center-fill of large circles. Outline circles were added by inserting JSR PLOT at key points, and could perhaps be faster. +The best way to accelerate circle drawing is to not draw a full circle. +Instead, draw an approximation of a circle using a series of lines. This +is a common technique when using 3D graphics hardware, as they are +generally geared toward polygon rendering. Outline circles would see a +significant improvement, with some reduction in quality. + ### Drawing Lines with Indexed Byte-Arrays ###