uxn

commit f7498cff5cc5995abe074caace991043bab66fdf
parent 0b134ff6b868a9772c8562ca60d5b852abb18f74
Author: Devine Lu Linvega <aliceffekt@gmail.com>
Date:   Thu,  9 Jun 2022 09:19:15 -0700

(tables.c) Improved sin table generator

Diffstat:
M
etc/tables/build.sh
 | 
2
+-
M
etc/tables/tables.c
 | 
11
++++++-----

2 files changed, 7 insertions(+), 6 deletions(-)
diff --git a/etc/tables/build.sh b/etc/tables/build.sh
@@ -8,7 +8,7 @@ rm -f ../../bin/tables
 
 echo "Building.."
 mkdir -p ../../bin
-cc -std=c89 -DDEBUG -Wall -Wno-unknown-pragmas -Wpedantic -Wshadow -Wextra -Werror=implicit-int -Werror=incompatible-pointer-types -Werror=int-conversion -Wvla -g -Og -fsanitize=address -fsanitize=undefined -lm tables.c -o ../../bin/tables
+cc  -lm tables.c -o ../../bin/tables
 
 echo "Assembling.."
 ../../bin/tables 
diff --git a/etc/tables/tables.c b/etc/tables/tables.c
@@ -25,12 +25,13 @@ clamp(int val, int min, int max)
 int
 main()
 {
-	int i;
-	printf("60 points on a circle128(bytex,bytey):\n\n");
-	for(i = 0; i < 60; ++i) {
+	int seg = 64, offset = seg / 4, i;
+	double segf = 64.0;
+	printf("%d points on a circle128:\n\n", seg);
+	for(i = 0; i < seg; ++i) {
 		double cx = 128, cy = 128, r = 128;
-		double pos = (i - 15) % 60;
-		double deg = (pos / 60.0) * 360.0;
+		double pos = (i - offset) % seg;
+		double deg = (pos / segf) * 360.0;
 		double rad = deg * (PI / 180);
 		double x = cx + r * cos(rad);
 		double y = cy + r * sin(rad);