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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;
}
cfg.radius[i] = prng.random().float(f32) * 500;
cfg.speed[i] = prng.random().intRangeAtMost(i32, 1, 1000);
}
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", .{});
}
}
/// Loads rules from a csv
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| {
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, .{});
}
for (&cfg.speed) |*s| {
const buf = try reader.readUntilDelimiterAlloc(allocator, ',', 16);
defer allocator.free(buf);
s.* = try std.fmt.parseInt(i32, buf, 10);
}
try reader.skipBytes(1, .{});
for (&cfg.radius) |*r| {
const buf = try reader.readUntilDelimiterAlloc(allocator, ',', 16);
defer allocator.free(buf);
r.* = try std.fmt.parseFloat(f32, buf);
}
try reader.skipBytes(1, .{});
{
const buf = try reader.readUntilDelimiterAlloc(allocator, ',', 16);
defer allocator.free(buf);
cfg.minDistance = try std.fmt.parseFloat(f32, buf);
}
{
const buf = try reader.readUntilDelimiterAlloc(allocator, ',', 16);
defer allocator.free(buf);
cfg.friction = try std.fmt.parseFloat(f32, buf);
}
}
/// Save rules to a csv
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");
}
for (cfg.speed) |s| {
try writer.print("{d},", .{s});
}
_ = try writer.write("\n");
for (cfg.radius) |r| {
try writer.print("{d:.3},", .{r});
}
_ = try writer.write("\n");
try writer.print("{d:.3},", .{cfg.minDistance});
try writer.print("{d:.3},", .{cfg.friction});
}
/// 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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