From 7e33567ba8943b098a5bb239fe81b828461a55cf Mon Sep 17 00:00:00 2001
From: "Haoran S. Diao" <0@hairydiode.xyz>
Date: Fri, 8 Feb 2019 13:11:56 -0500
Subject: initial commit

---
 Makefile      |  14 +++++
 README        |   7 +++
 cbrll.c       | 186 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 cbrll.h       |  12 ++++
 demo/Makefile |   6 ++
 demo/README   |   3 +
 demo/wsim.c   | 168 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 7 files changed, 396 insertions(+)
 create mode 100644 Makefile
 create mode 100644 README
 create mode 100644 cbrll.c
 create mode 100644 cbrll.h
 create mode 100644 demo/Makefile
 create mode 100644 demo/README
 create mode 100644 demo/wsim.c

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..ced6be0
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,14 @@
+libcbrll.a : cbrll.o
+	ar ru libcbrll.a cbrll.o
+	ranlib libcbrll.a
+cbrll.o : cbrll.c cbrll.h
+	gcc -c cbrll.c
+clean:
+	rm libcbrll.a cbrll.o
+install:
+	cp libcbrll.a /usr/lib/libcbrll.a
+	cp cbrll.h /usr/include/cbrll.h
+remove:
+	rm /usr/lib/libcbrll.a
+	rm /usr/include/cbrll.h
+	
diff --git a/README b/README
new file mode 100644
index 0000000..c6a685d
--- /dev/null
+++ b/README
@@ -0,0 +1,7 @@
+Library for drawing graphics with braille characters.
+By default, the screen is only 200x200 braille "pixels".
+requires only standard C libraries.
+
+To install:
+	make
+	sudo make install
diff --git a/cbrll.c b/cbrll.c
new file mode 100644
index 0000000..0167ef0
--- /dev/null
+++ b/cbrll.c
@@ -0,0 +1,186 @@
+#include "cbrll.h"
+/* this library stores the screen in a variable referred to in functions as map
+ * it takes the form of a 2 dimensional array of uint8_t
+ * takes char storing the on/off positions of 8 points, in braille encoding
+ * order, and prints the corresponding braille char
+ * maps maximum size is 200x200 pixels, which works out to a 50 by 100 array
+ */
+
+void printbraille(uint8_t points) {
+	/* outputs braille characters, the encoding for braile is:
+	 * 1 4
+	 * 2 5
+	 * 3 6
+	 * 7 8
+	 * with the block being in U+2800 to U+28FF
+	 * in utf8 that's encoded
+	 * 1110xxxx 10xxxxxx 10xxxxxx
+	 * [1110](0010) [10](1000)87 [10]654321
+	 */
+	printf("%c%c%c", 
+		0b11100010, 
+		0b10100000 | (points >> 6),
+		0b10000000 | (points & 0b00111111));
+}
+/* prints the map, clears output before aswell*/
+/*prints x1 to x2, y1 to y2 bytes of the map*/
+void printmap( uint8_t x1, uint8_t x2, uint8_t y1, uint8_t y2 ) {
+	uint8_t xi = x1;
+	uint8_t yi = y1;
+	/*terminal escape code to move the cursor to beginning of screen or 1,1*/
+	printf("\033[1;1H");
+	while (yi < y2) {
+		xi = 0;
+		while (xi < x2) {
+			printbraille(map[xi][yi]);
+			xi++;
+		}
+		printf("\n");
+		yi++;
+	}
+}
+/* sets a pixel in the map, converts x,y coordinates to braille order
+ * if set is 0, then set it to 0
+ * if 1, set to 1
+ * if > 1, flip
+ * does not throw errors
+ */
+void setpixel(uint8_t x, uint8_t y,uint8_t set) {
+	/* anchor x and y coordinates, eg the index in map*/
+	uint8_t ax;
+	uint8_t ay;
+	/*bitmask in braille order of the byte in mask*/
+	uint8_t shift = 0x01;
+	/* check if out of bounds, since the arguments are unsigned, don't have
+	 * to check below 0, doesn't throw errors
+	 */
+	if ( (x >= 200 ) || (y >= 200) ) {
+		return;
+	}
+	/* integer division rounds down, therefore dividing will always get the
+	 * index
+	 */
+	ax = x/2;
+	ay = y/4;
+	/*
+	 * maps to braille order based off of x and y offsets
+	 * 1 4
+	 * 2 5
+	 * 3 6
+	 * 7 8
+	 */
+	switch(x % 2) {
+		case 0:
+			switch (y % 4) {
+				case 0:
+					shift = shift << 0;
+				break;
+				case 1:
+					shift = shift << 1;
+				break;
+				case 2:
+					shift = shift << 2;
+				break;
+				case 3:
+					shift = shift << 6;
+				break;
+			}
+		break;
+		case 1:
+			switch (y % 4) {
+				case 0:
+					shift = shift << 3;
+				break;
+				case 1:
+					shift = shift << 4;
+				break;
+				case 2:
+					shift = shift << 5;
+				break;
+				case 3:
+					shift = shift << 7;
+				break;
+			}
+		break;
+	}
+	/* sets the bit based on set*/
+	switch (set) {
+		case 0:
+			map[ax][ay] = map[ax][ay] & (~shift);
+		break;
+		case 1:
+			map[ax][ay] = map[ax][ay] | shift;
+		break;
+		default:
+			map[ax][ay] = ((~map[ax][ay]) & shift) | 
+					((~shift) & map[ax][ay]);
+		break;
+	}
+	return;
+}
+/*takes two points and draws a line between them, dot specifies that every nth x
+ * point be drawn, if dot != 1, then a dotted line is drawn
+ */
+void drawline(uint8_t x1, uint8_t y1, uint8_t x2, uint8_t y2, uint8_t dot) {
+	/*temporary x and y for switching x1,y1 and x2,y1 if x1>x2*/
+	uint8_t tv;
+	/*number of x values to translate*/
+	uint8_t dx;
+	/*number of y values to translate*/
+	uint8_t dy;
+	/* for whether dy should be positive or negative, 1 pos, 0 neg*/
+	uint8_t dir;
+	/*drawin index*/
+	uint8_t xi = 0;
+	/*makes sure that x1 < x2, otherwise switch them arround*/
+	if (x1 > x2) {
+		tv = x1;
+		x1 = x2;
+		x2 = tv;
+		tv = y1;
+		y1 = y2;
+		y2 = tv;
+	}
+	dx = x2 - x1;
+	/*find absolute
+	 * dir is used since i'm planning to port to a platform that may not
+	 * have signed ints.
+	 */
+	if (y1 > y2) {
+		dir = 0;
+		dy = y1 - y2;
+	} else {
+		dir = 1;
+		dy = y2 - y1;
+	}
+	/*
+	 *For vertical Lines
+	 * Uses xi as a y index now
+	 */
+	if (x1 == x2) {
+		while (xi <= dy) {
+			if (dir) {
+				setpixel(x1, y1 + xi, 1);
+			} else {
+				setpixel(x1, y1 - xi, 1);
+			}
+			xi++;
+		}
+	}
+	/*
+	 * loop through x and draws y in line, dots done with modulus.
+	 */
+	while (xi <= (dx)) {
+		if ((xi % dot) == 0) {
+			if (dir) {
+				setpixel(x1 + xi, y1 + ((dy/dx * xi)), 1);
+			} else {
+				setpixel(x1 + xi, y1 - ((dy/dx * xi)), 1);
+			}
+		}
+		xi++;
+	}
+	
+	return;	
+}
+
diff --git a/cbrll.h b/cbrll.h
new file mode 100644
index 0000000..289cf58
--- /dev/null
+++ b/cbrll.h
@@ -0,0 +1,12 @@
+#ifndef CBRLL_H
+#define CBRLL_H
+#include<stdint.h>
+//for standard types
+#include<stdio.h>
+//for printf
+extern uint8_t map[100][50];
+void printbraille(uint8_t points);
+void printmap( uint8_t x1, uint8_t x2, uint8_t y1, uint8_t y2 );
+void setpixel(uint8_t x, uint8_t y,uint8_t set);
+void drawline(uint8_t x1, uint8_t y1, uint8_t x2, uint8_t y2, uint8_t dot);
+#endif
diff --git a/demo/Makefile b/demo/Makefile
new file mode 100644
index 0000000..870d2f4
--- /dev/null
+++ b/demo/Makefile
@@ -0,0 +1,6 @@
+wsim : wsim.o
+	gcc wsim.o -o wsim   -lcbrll
+wsim.o : wsim.c
+	gcc -c wsim.c 
+clean :
+	rm wsim.o wsim
diff --git a/demo/README b/demo/README
new file mode 100644
index 0000000..71d0d53
--- /dev/null
+++ b/demo/README
@@ -0,0 +1,3 @@
+Past attempt at
+Simple Cellular Automata Like simulator using braille graphics.
+
diff --git a/demo/wsim.c b/demo/wsim.c
new file mode 100644
index 0000000..78fdf77
--- /dev/null
+++ b/demo/wsim.c
@@ -0,0 +1,168 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include "cbrll.h"
+/* map holding the pixels for a 200x200 pixel imagebuffer, [x][y] 
+ * bits are in braille order within each byte
+ */
+uint8_t map[100][50];
+/* takes char storing the on/off positions of 8 points, in braille encoding
+ * order, and prints the corresponding braille char
+ */
+
+/* global state bit switch */
+uint8_t state = 3;
+#define STATE_LOOP 0x01
+#define STATE_DEJURE 0x02
+
+
+/*node, the thing being simulated 
+ * 16 bytes each
+ */
+struct node {
+	/*culture to compare similatiry*/
+	uint8_t culture;
+	/*strength to spread culture*/
+	uint8_t memetic;
+	/*strength martial*/
+	uint8_t martial;
+	/*state allegiance*/
+	uint8_t dejure;
+	/*x and y positions*/
+	uint8_t x;
+	uint8_t y;
+	/*connections to other nodes, 0 represents none*/
+	uint8_t connections[10];
+};
+/*all the nodes, 0 is not used*/
+struct node nodes[256];
+/*makes a new random node*/
+struct node makenode() {
+	/*node to work on*/
+	struct node rnode;
+	rnode.culture = (uint8_t)rand();
+	rnode.memetic = (uint8_t)rand();
+	rnode.martial = (uint8_t)rand();
+	rnode.dejure = (uint8_t)rand();
+	rnode.x = (uint8_t)rand();
+	while (rnode.x >= 200) {
+		rnode.x = (uint8_t)rand();
+	}
+	rnode.y = (uint8_t)rand();
+	while (rnode.y >= 200) {
+		rnode.y = (uint8_t)rand();
+	}
+	memset(rnode.connections, 0, 10*sizeof(uint8_t));
+	return rnode;
+}
+/*draws nodes based on dejure or culture*/
+void drawnode(struct node drawn) {
+	/*which symbol to draw*/
+	uint8_t symbol;
+	if (state & STATE_DEJURE) {
+		symbol = drawn.dejure;
+	} else {
+		symbol = drawn.culture;
+	}
+	/* draws symbol*/
+	/*layout as follows 
+	 * 012
+	 * 7X3
+	 * 654
+	 */
+	setpixel(drawn.x, drawn.y, 1);
+	setpixel(drawn.x-1, drawn.y-1, (symbol & (0x01 << 0)) && 1);
+	setpixel(drawn.x, drawn.y-1, (symbol & (0x01 << 1)) && 1);
+	setpixel(drawn.x+1, drawn.y-1, (symbol & (0x01 << 2)) && 1);
+	setpixel(drawn.x+1, drawn.y, (symbol & (0x01 << 3)) && 1);
+	setpixel(drawn.x+1, drawn.y+1, (symbol & (0x01 << 4)) && 1);
+	setpixel(drawn.x, drawn.y+1, (symbol & (0x01 << 5)) && 1);
+	setpixel(drawn.x-1, drawn.y+1, (symbol & (0x01 << 6)) && 1);
+	setpixel(drawn.x-1, drawn.y, (symbol & (0x01 << 7)) && 1);
+	/*draws memetic strenth*/
+	/*Ma
+	 *00123 Me
+	 *1XXX4
+	 *2XOX5
+	 *3XXX6
+	 *45677
+	 */
+	//a swich without breaks keeps executing
+	switch (drawn.memetic / 32) {
+		case 7:
+			setpixel(drawn.x+2,drawn.y+2,1);
+		case 6:
+			setpixel(drawn.x+2,drawn.y+1,1);
+		case 5:
+			setpixel(drawn.x+2,drawn.y,1);
+		case 4:
+			setpixel(drawn.x+2,drawn.y-1,1);
+		case 3:
+			setpixel(drawn.x+2,drawn.y-2,1);
+		case 2:
+			setpixel(drawn.x+1,drawn.y-2,1);
+		case 1:
+			setpixel(drawn.x,drawn.y-2,1);
+		case 0:
+			setpixel(drawn.x-1,drawn.y-2,1);
+	}
+	//martial strenth
+	switch (drawn.martial / 32) {
+		case 7:
+			setpixel(drawn.x+1,drawn.y+2,1);
+		case 6:
+			setpixel(drawn.x,drawn.y+2,1);
+		case 5:
+			setpixel(drawn.x-1,drawn.y+2,1);
+		case 4:
+			setpixel(drawn.x-2,drawn.y+2,1);
+		case 3:
+			setpixel(drawn.x-2,drawn.y+1,1);
+		case 2:
+			setpixel(drawn.x-2,drawn.y,1);
+		case 1:
+			setpixel(drawn.x-2,drawn.y-1,1);
+		case 0:
+			setpixel(drawn.x-2,drawn.y-2,1);
+	}
+	//draws connections
+	for (uint8_t i = 0; i < 10; i++) {
+		if (drawn.connections[i] != 0) {
+			drawline(drawn.x, drawn.y, 
+				nodes[drawn.connections[i]].x,
+				nodes[drawn.connections[i]].y, 
+				1);
+		}
+	}
+}
+
+int main (int argc, char * argv[]) {
+	/*holds keypress*/
+	char input;
+	/*zeroing map*/
+	memset(map, 0, sizeof(map[0][0]) * 100 * 50);
+	/*seeds random*/
+	srand(696969);
+	for (int i = 0; i < 64; i++) {
+		nodes[i] = makenode();
+	}
+	while (state & STATE_LOOP) {
+		for (int i = 1; i < 64; i++) {
+			drawnode(nodes[i]);
+		}
+		drawnode(nodes[0]);
+		printmap(0, 100, 0, 50);
+
+		
+		/* checks input*/
+		input = getc(stdin);
+		/*haven't set the terminal to raw mode so will still need
+ 		 * space
+		 */
+		if (input == 'q') {
+			state = state & (~STATE_LOOP);
+		}
+	}
+	return 0;
+}
-- 
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