implement polygon

a bug in the fill algorythm where it fills every

main.zig

@@ -39,6 +39,14 @@ fn draw() !void {
     var slice: []u8 = undefined;
     var bytes_written: u3 = 0;
     var buffer_size: u32 = 0;
+    var polygon = primitive.LinkedList().new(allocator);
+
+    try polygon.add(.{ .x = 5, .y = 5, .z = 0 });
+    try polygon.add(.{ .x = 67, .y = 13, .z = 0 });
+    try polygon.add(.{ .x = 77, .y = 33, .z = 0 });
+    try polygon.add(.{ .x = 48, .y = 21, .z = 0 });
+    try polygon.add(.{ .x = 21, .y = 39, .z = 0 });
+    try polygon.add(.{ .x = 24, .y = 23, .z = 0 });
 
     w = try getTermDimension();
     buffer_size = w.ws_row;
@@ -62,7 +70,7 @@ fn draw() !void {
                 slice[bytes_written + ii] = 0;
             }
         }
-        try triangle(buffer, w, definitions.vec);
+        //try triangle(buffer, w, definitions.vec);
         //_ = try bresenham(buffer, w, Point{ .x = 10, .y = 10, .z = 0 }, Point{ .x = 30, .y = 12, .z = 0 });
 
         try out.print("\x1B[2J", .{});
@@ -75,9 +83,10 @@ fn draw() !void {
         // mv_axis_border_bounce(w, &primitive.vec.b, 'y');
         // mv_axis_border_bounce(w, &primitive.vec.c, 'x');
         // mv_axis_border_bounce(w, &primitive.vec.c, 'y');
-
+        try primitive.polygon_draw(buffer, w, &polygon);
         try fill_draw(w, buffer);
         try out.print("{s}", .{buffer});
+
         sleep(30000000);
     }
 }

primitives.zig

@@ -56,17 +56,18 @@ pub fn LinkedList() type {
             self.length += 1;
         }
         pub fn next(self: *Self) Point {
-            var current: ?*Node = undefined;
-            if (self.current != null) {
-                current = self.current;
-                self.current = self.current.?.next;
+            var elem: ?*Node = undefined;
+
+            if (self.current == null) {
+                elem = self.head;
+                self.current = self.head.?.next;
             } else {
-                current = self.head;
-                self.current = self.head;
+                elem = self.current;
+                self.current = self.current.?.next;
+            }
+            return elem.?.point;
         }
 
-            return current.?.point;
-        }
         pub fn dump(self: *Self) ![]Point {
             const allocator = self.allocator;
             var node = self.head;
@@ -101,25 +102,23 @@ test "test linked list" {
 
     const points: []Point = try polygon.dump();
     for (points) |point| {
-        std.debug.print("x:{}\n", .{point.x});
-        std.debug.print("y:{}\n", .{point.y});
-        std.debug.print("z:{}\n", .{point.z});
+        std.debug.print("Point dump:{}\n", .{point});
     }
     std.debug.print("next:{}\n", .{polygon.next()});
     std.debug.print("next:{}\n", .{polygon.next()});
-    std.debug.print("next:{}\n", .{polygon.next()});
-    std.debug.print("next:{}\n", .{polygon.next()});
-    std.debug.print("next:{}\n", .{polygon.next()});
-    std.debug.print("next:{}\n", .{polygon.next()});
-    std.debug.print("next:{}\n", .{polygon.next()});
-    std.debug.print("next:{}\n", .{polygon.next()});
-    std.debug.print("next:{}\n", .{polygon.next()});
-    std.debug.print("next:{}\n", .{polygon.next()});
-    std.debug.print("next:{}\n", .{polygon.next()});
-    std.debug.print("next:{}\n", .{polygon.next()});
-    std.debug.print("next:{}\n", .{polygon.next()});
-    std.debug.print("next:{}\n", .{polygon.next()});
-    std.debug.print("next:{}\n", .{polygon.next()});
+    std.debug.print("typeof:{}\n", .{@TypeOf(polygon)});
+}
+
+pub fn polygon_draw(buf: []u8, w: Winsize, poly: *LinkedList()) !void {
+    var i: u8 = 0;
+    var previous: Point = poly.next();
+    var current: Point = undefined;
+
+    while (i < poly.length) : (i += 1) {
+        current = poly.next();
+        try bresenham(buf, w, previous, current);
+        previous = current;
+    }
 }
 
 pub fn pixel(buffer: []u8, w: Winsize, x: i64, y: i64, symbol: u21) !void {