testing plotting in PDF's

Courses/EE1M2_Calculus_and_Linear_Algebra.typ

@@ -1,4 +1,6 @@
 #import "../template/lib.typ" : *
+#import "@preview/cetz:0.4.2"
+#import "@preview/cetz-plot:0.1.3"
 #set page(paper: "a4")
 
 #show: notes.with(
@@ -53,6 +55,52 @@ are referred to as *grid curves*.
     r(theta,r) &= chevron.l r cos(theta), r sin(theta), sqrt(1-r^2) chevron.r "with" 0 <= r <= 1, 0<=theta<= 2 pi\
     r(theta,phi,rho) &= chevron.l rho cos(theta) sin(phi), rho sin(theta) sin(phi), rho cos(phi) chevron.r "with" 0 <= rho <= 1, 0 <= phi <= pi/2, 0 <= theta <= 2 pi
   $
+
+  #cetz.canvas({
+    import cetz.draw: *
+    import cetz-plot: *
+
+    plot.plot(
+      size: (2,2),
+      x-min: -1,
+      x-max: 1,
+      y-min: -1,
+      y-max: 1,
+      x-ticks: (1,),
+      y-ticks: (1,), 
+      x-tick-step: none,
+      y-tick-step: none,
+      axis-style: "school-book",
+      {
+        plot.add(
+          domain: (0, 2*calc.pi),
+          t => (calc.cos(t), calc.sin(t))
+        )
+
+        let reso(n) = {
+          range(2*n + 1)
+        }
+
+        let res = reso(4)
+
+        for x-loc in res {
+          let act_loc = (2/(res.len()-1)) * x-loc - 1
+          plot.add(style: (stroke: black), (
+            (act_loc, -calc.sqrt(1-act_loc*act_loc)),
+            (act_loc, calc.sqrt(1-act_loc*act_loc))
+          ))
+        }
+
+        for y-loc in res {
+          let act_loc = (2/(res.len()-1)) * y-loc - 1
+          plot.add(style: (stroke: black), (
+            (-calc.sqrt(1-act_loc*act_loc), act_loc),
+            (calc.sqrt(1-act_loc*act_loc), act_loc)
+          ))
+        }
+      }
+    )
+  })
 ]
 
 #definition[