added support for different size of terminal

readme.md

@@ -2,5 +2,11 @@
 
 the cursive plaintext snake writer
 * new so it still works pretty bad
-* you need your terminal to 80 characters wide and 30 characters high.
+* now support for any size of terminal
 * use w,s,a,d to move the snake use q to exit and save the snake
+
+toekomstmuziek:
+* build a more TUI like interface where we don't clear the screen
+* removing the flasing effect while drawing.
+* put a blinking cursor where the snake currently is
+* implement pen-up and pen-down

snakelogan

@@ -2,24 +2,34 @@
 
 
 _STTY=$(stty -g)    # Save current terminal setup
-#printf   "\e[2J"    # clear screen, set cursos at beginning
+printf   "\e[2J"    # clear screen, set cursos at beginning
 stty -echo -icanon  # Turn off line buffering
+printf '\e[?25h'
 
 # VARIABLES
 typeset -A IMAGE
 X=0 
 Y=24
+height=0
+width=0
 snake='═'
 
 vertical=false
 forward=true
 upward=true
 
+function get_size() {
+    # Get terminal size ('stty' is POSIX and always available).
+    read -r LINES COLUMNS < <(stty size)
+		height=$((LINES-1))
+		width=$((COLUMNS-1))
+}
+
 function start_the_snake() {
 	rm thesnake
-	for i in {0..29}
+	for i in {0..$height}
 	do
-		for j in {0..79}
+		for j in {0..$width}
 		do
 			IMAGE["${i};${j}"]=' ' ; printf ${IMAGE["${i};${j}"]}
 		done
@@ -27,20 +37,21 @@ function start_the_snake() {
 }
 
 function save_the_snake() {
-	for i in {0..29}
+	for i in {0..$height}
 	do
-		for j in {0..79}
+		for j in {0..$width}
 		do
 			printf ${IMAGE["${i};${j}"]}
 		done
 	done >> thesnake
+	#sed -e "s/.\{$((width-1))\}/&\n/g" < thesnake > snake80
 }
 
 function show_the_snake() {
-	clear
-	for i in {0..29}
+	printf '\e[2J\e[H'
+	for i in {0..$height}
 	do
-		for j in {0..79}
+		for j in {0..$width}
 		do
 			printf ${IMAGE["${i};${j}"]}
 		done
@@ -110,6 +121,7 @@ function move_snake_backward() {
 }
 
 # Main #
+get_size
 start_the_snake
 while read -s -k 1 cr;
 do
@@ -117,7 +129,7 @@ do
 		w)	move_snake_up ; show_the_snake ;;
 		s)	move_snake_down ; show_the_snake ;;
 		a)	move_snake_backward ; show_the_snake ;;
-		d)	 move_snake_forward ; show_the_snake ;;
+		d)	move_snake_forward ; show_the_snake ;;
 		q)	save_the_snake && at_exit ;;
 	esac
 done