Added tropical handout

Advanced/Tropical Polynomials/macros.typ

@@ -0,0 +1,69 @@
+#import "@preview/cetz:0.3.1"
+#import "handout.typ": *
+
+// Shorthand, we'll be using these a lot.
+#let tp = sym.plus.circle
+#let tm = sym.times.circle
+
+#let graphgrid(inner_content) = {
+  align(
+    center,
+    box(
+      inset: 3mm,
+      cetz.canvas({
+        import cetz.draw: *
+        let x = 5.25
+
+        grid(
+          (0, 0), (x, x), step: 0.75,
+          stroke: luma(100) + 0.3mm
+        )
+
+        if (inner_content != none) {
+          inner_content
+        }
+
+        mark((0, x + 0.5), (0, x + 1), symbol: ">", fill: black, scale: 1)
+        mark((x + 0.5, 0), (x + 1, 0), symbol: ">", fill: black, scale: 1)
+
+        line(
+          (0, x + 0.25),
+          (0, 0),
+          (x + 0.25, 0),
+          stroke: 0.75mm + black,
+        )
+      }),
+    ),
+  )
+}
+
+/// Adds extra padding to an equation.
+/// Used as follows:
+///
+/// #eqmbox($
+///   f(x) = -2(x #tp 2)(x #tp 8)
+/// $)
+///
+/// Note that there are newlines between the $ and content,
+/// this gives us display math (which is what we want when using this macro)
+#let eqnbox(eqn) = {
+  align(
+    center,
+    box(
+      inset: 3mm,
+      eqn,
+    ),
+  )
+}
+
+#let dotline(a, b) = {
+  cetz.draw.line(
+    a,
+    b,
+    stroke: (
+      dash: "dashed",
+      thickness: 0.5mm,
+      paint: ored,
+    ),
+  )
+}