add logging

src/main.zig

@@ -2,35 +2,21 @@ const std = @import("std");
 const rl = @import("raylib");
 const rg = @import("raygui");
 const pr = @import("primitives.zig");
+const plot = @import("plot.zig");
+
 const allocator = std.heap.page_allocator;
-
-var prng = std.rand.DefaultPrng.init(124346556);
-
+var prng = std.rand.DefaultPrng.init(124346234556);
 const rand = prng.random();
 
+const screenWidth = 1200;
+const screenHeight = 800;
+
 fn randMinMaxFloat(min: f32, max: f32) f32 {
     var r1 = rand.float(f32);
     r1 = 2 * (r1 - 0.5); //-0.5..0.5
     return (@abs(min) + @abs(max)) / 2 * r1;
 }
 
-test "random" {
-    var seed: u64 = undefined;
-    var r1: f32 = undefined;
-    try std.posix.getrandom(std.mem.asBytes(&seed));
-
-    prng = std.rand.DefaultPrng.init(seed);
-    while (true) {
-        r1 = randMinMaxFloat(-10, 10);
-        //std.debug.print("randMinMaxFloat:{}\n",.{r1});
-        if (r1 > 8 or r1 < -8) {
-            std.debug.print("Greater:{}\n", .{r1});
-        }
-    }
-}
-const screenWidth = 1200;
-const screenHeight = 800;
-
 const Particle = struct {
     const Self = @This();
     position: pr.Vec = .{ .a = .{ .x = 0, .y = 0, .z = 0 } },
@@ -193,6 +179,12 @@ pub fn main() anyerror!void {
 
     rl.setTargetFPS(60); // Set our game to run at 60 frames-per-second
 
+    const file = try plot.open("plot.dat");
+    try plot.log(file,"test\ntest2\n");
+
+    var plotStr : []u8 = undefined;
+    var plotStrBuf : [128]u8 = undefined;
+
     while (!rl.windowShouldClose()) { // Detect window close button or ESC key
         rl.beginDrawing();
         defer rl.endDrawing();
@@ -213,9 +205,15 @@ pub fn main() anyerror!void {
         }
         
         rl.beginBlendMode(rl.BlendMode.blend_additive);
-        emitter.update(texture);
+
         rl.endBlendMode();
+        
+        plotStr = try std.fmt.bufPrint(&plotStrBuf,"{}, {}, {}\n",.{emitter.particles[0].acceleration.a.x,emitter.particles[0].position.a.x,emitter.particles[0].velocity.a.x});
+        try plot.log(file,plotStr);
+
+        emitter.update(texture);
     }
+    plot.close(file);
 }
 
 test "simple test" {
@@ -224,3 +222,18 @@ test "simple test" {
     try list.append(42);
     try std.testing.expectEqual(@as(i32, 42), list.pop());
 }
+
+test "random" {
+    var seed: u64 = undefined;
+    var r1: f32 = undefined;
+    try std.posix.getrandom(std.mem.asBytes(&seed));
+
+    prng = std.rand.DefaultPrng.init(seed);
+    while (true) {
+        r1 = randMinMaxFloat(-10, 10);
+        //std.debug.print("randMinMaxFloat:{}\n",.{r1});
+        if (r1 > 8 or r1 < -8) {
+            std.debug.print("Greater:{}\n", .{r1});
+        }
+    }
+}

src/plot.zig

@@ -0,0 +1,16 @@
+const std = @import("std");
+
+pub fn log(self : std.fs.File,data : []const u8) !void
+{
+    try self.writeAll(data);
+}
+
+pub fn open(file : []const u8) !std.fs.File
+{
+    const fileh = try std.fs.cwd().createFile(file,.{.read = true});
+    return fileh;
+}
+pub fn close(file : std.fs.File) void
+{
+    file.close();
+}