Implement simple line drawing

build.sh

@@ -3,9 +3,9 @@
 cc="gcc"
 warn="-std=c23 -pedantic -Wall -Wextra"
 opt="-O2 -march=native"
-libs="-I/usr/include/libdrm -ldrm"
+libs="-I/usr/include/libdrm -ldrm -lm"
 defs="-D_POSIX_C_SOURCE=200809L"
 
 $cc $flags $libs $defs \
 	-o asteroids \
-	fb.c input.c main.c renderer.c
+	fb.c input.c main.c maths.c renderer.c