From 0dc97d45f1b228f6f3b9feb1773b972eca343766 Mon Sep 17 00:00:00 2001
From: Nic Gaffney <gaffney_nic@protonmail.com>
Date: Thu, 20 Jun 2024 00:44:24 -0500
Subject: Added load / save feature with simple CSV parsing

---
 src/rules.zig | 76 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 src/rules.zig

(limited to 'src/rules.zig')

diff --git a/src/rules.zig b/src/rules.zig
new file mode 100644
index 0000000..2a2f1d3
--- /dev/null
+++ b/src/rules.zig
@@ -0,0 +1,76 @@
+const cfg = @import("config.zig");
+const std = @import("std");
+
+/// Generate the set of rules the particles will abide by
+pub fn ruleMatrix() [cfg.colorAmnt][cfg.colorAmnt]f32 {
+    const seed = @as(u64, @truncate(@as(u128, @bitCast(std.time.nanoTimestamp()))));
+    var prng = std.rand.DefaultPrng.init(seed);
+    var rules: [cfg.colorAmnt][cfg.colorAmnt]f32 = undefined;
+    for (0..cfg.colorAmnt) |i| {
+        for (0..cfg.colorAmnt) |j| {
+            var val = prng.random().float(f32);
+            const isNeg = prng.random().uintAtMost(u8, 1);
+            if (isNeg == 1) val = 0 - val;
+            rules[i][j] = val;
+        }
+    }
+    return rules;
+}
+
+/// Prints rules generated from ruleMatrix()
+pub fn printRules(rules: [cfg.colorAmnt][cfg.colorAmnt]f32) void {
+    std.debug.print("\n| {s:^7} ", .{"Rules"});
+    for (0..cfg.colors.len) |c|
+        std.debug.print("| {s:^7} ", .{colorToString(c)});
+
+    std.debug.print("|\n", .{});
+    for (rules, 0..) |row, i| {
+        std.debug.print("| {s:^7} ", .{colorToString(i)});
+        for (row) |col|
+            std.debug.print("| {d:^7.1} ", .{col});
+
+        std.debug.print("|\n", .{});
+    }
+}
+
+pub fn loadRules(allocator: std.mem.Allocator, absolutePath: [:0]u8) !void {
+    const file = try std.fs.openFileAbsoluteZ(absolutePath, .{ .mode = .read_only });
+    defer file.close();
+    var reader = file.reader();
+    for (&cfg.rules) |*row| {
+        std.debug.print("Row\n", .{});
+        for (row) |*col| {
+            const buf = try reader.readUntilDelimiterAlloc(allocator, ',', 16);
+            defer allocator.free(buf);
+            col.* = try std.fmt.parseFloat(f32, buf);
+        }
+        try reader.skipBytes(1, .{});
+    }
+}
+
+pub fn saveRules(absolutePath: [:0]u8) !void {
+    const file = try std.fs.createFileAbsoluteZ(absolutePath, .{ .read = true });
+    defer file.close();
+    var writer = file.writer();
+    for (cfg.rules) |row| {
+        for (row) |col| {
+            try writer.print("{d:.3},", .{col});
+        }
+        _ = try writer.write("\n");
+    }
+}
+
+/// Convert the color index to a string
+pub fn colorToString(c: usize) []const u8 {
+    return switch (c) {
+        0 => "Red",
+        1 => "Green",
+        2 => "Blue",
+        3 => "Yellow",
+        4 => "Magenta",
+        5 => "Brown",
+        6 => "Orange",
+        7 => "Gray",
+        else => " ",
+    };
+}
-- 
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