From 55aee8c40bd7e1106138c126bbc4f613a46ff53c Mon Sep 17 00:00:00 2001
From: violette <vi@violette.town>
Date: Fri, 2 May 2025 12:43:00 -0400
Subject: [PATCH] feat: vbuf and licence

---
 main.c | 29 +++++++++++++++++++++++++----
 1 file changed, 25 insertions(+), 4 deletions(-)

diff --git a/main.c b/main.c
index eebb8f8..f6254b3 100644
--- a/main.c
+++ b/main.c
@@ -1,3 +1,12 @@
+/*
+ * ----------------------------------------------------------------------------
+ * "THE BEER-WARE LICENSE" (Revision 43):
+ * vi@violette.town wrote this file. You can do whatever you want with this
+ * stuff. If we meet some day, and you think this stuff is worth it,
+ * you can buy me a beer in return.                             Violette Paulin
+ * ----------------------------------------------------------------------------
+ */
+
 #include <stdio.h>
 #include <math.h>
 #include <unistd.h>
@@ -60,6 +69,9 @@ struct Quaternions {
 double		interpolationStep = 0;
 double		zBuffer[SCREEN_HEIGHT * SCREEN_WIDTH];
 char		output[SCREEN_HEIGHT * SCREEN_WIDTH];
+#ifdef VBUF
+char		buf[SCREEN_HEIGHT * SCREEN_WIDTH + 30 * 20]; // stdout buffer
+#endif
 
 static volatile char shouldBreak = 1;
 static volatile char currentlyMoving = 0;
@@ -325,15 +337,14 @@ printCV(char face, struct json_object_element_s *r)
 void
 printAscii(struct json_value_s *json)
 {
-	fcntl(STDOUT_FILENO, F_SETFL, ~O_NONBLOCK);
-	char		face = chooseMainFace();
+	char face = chooseMainFace();
 	struct json_object_element_s *root = json_value_as_object(json)->start;
 	printCV(face, root);
 
 	for (int k = 0; k < SCREEN_WIDTH * SCREEN_HEIGHT; ++k)
 		printf("%s", k % SCREEN_WIDTH ? chooseColor(output[k]) : "\r\n");
 	printf("\r\n");
-	fcntl(STDIN_FILENO, F_SETFL, O_NONBLOCK);
+	fflush(stdout);
 }
 
 void
@@ -482,6 +493,7 @@ handleAngle(char *input)
 char
 getInput(char *keyboardInput)
 {
+	fcntl(STDIN_FILENO, F_SETFL, O_NONBLOCK);
 	char c = getchar();
 	if (c == '\033') {
 		if ((c = getchar()) == '[')
@@ -505,6 +517,8 @@ getInput(char *keyboardInput)
 	if (c != EOF)
 		*keyboardInput = c;
 	while ((c = getchar()) != '\n' && c != EOF) {} //clean stdin
+						       //
+	fcntl(STDIN_FILENO, F_SETFL, ~O_NONBLOCK);
 	handleAngle(keyboardInput);
 	return c;
 }
@@ -540,11 +554,18 @@ main()
 	t.c_cc[VINTR] = 3;
 	tcsetattr(STDIN_FILENO, TCSANOW, &t);
 
+#ifdef VBUF
+	setvbuf(stdout, buf, _IOFBF, sizeof(buf));
+#endif
+
 	Current = GET_ROTATE_Z_Q(0);
 
 	struct json_value_s *json = readJson();
 
 	while (shouldBreak) {
+#ifdef VBUF
+		memset(buf, ' ', sizeof(buf));
+#endif
 		memset(output, ' ', SCREEN_WIDTH * SCREEN_HEIGHT);
 		memset(zBuffer, DBL_MIN, SCREEN_WIDTH * SCREEN_HEIGHT * sizeof(double));
 
@@ -562,6 +583,6 @@ main()
 		printf("\x1b[2J");
 		printAscii(json);
 		getInput(&keyboardInput);
-		usleep(10000);
+		usleep(1000000 / 60); // 60fps max
 	}
 }