clamp h if too big

fix for #198

src/context.ts

@@ -1458,7 +1458,7 @@ function sub_path_to_stroked_sub_path(
       const A = curr;
       const B = cmd[1];
       if (A.equals(B))
-        return console.log("can't project the same paths", i, cmd, A, B);
+        return console.warn("can't project the same paths", i, cmd, A, B);
       // console.log(i,"====",B)
       let next = path[i + 1];
       //if first
@@ -1479,7 +1479,7 @@ function sub_path_to_stroked_sub_path(
       }
       const C = next[1];
       if (C.equals(B))
-        return console.log("can't project the same paths", i, cmd, A, B);
+        return console.warn("can't project the same paths", i, cmd, A, B);
       // console.log(i,A,B,C)
       // console.log("next",next)
       let BA = A.subtract(B);
@@ -1511,6 +1511,7 @@ function sub_path_to_stroked_sub_path(
         //if turning left
         //adjust outside
         let h = w / Math.cos(-(Math.PI - turn) / 2);
+        if (h > 10) h = 10;
         let C_unit = C.subtract(B)
           .unit()
           .rotate(-turn / 2)

test/bugs/bug198.test.ts

@@ -0,0 +1,32 @@
+import { describe, beforeEach, it, expect } from "vitest";
+import * as pureimage from "../../src/index.js";
+import { save } from "../common.js";
+
+describe("bug-198", () => {
+  it("should draw lines", async () => {
+    const img = pureimage.make(128, 128);
+    const ctx = img.getContext("2d");
+
+    ctx.fillStyle = "white";
+    ctx.fillRect(0, 0, 128, 128);
+    ctx.lineWidth = 4; // works with 1
+    ctx.strokeStyle = "black";
+    ctx.beginPath();
+    const line = [
+      [90.0, 91],
+      [92.25, 91],
+      [92.25, 90],
+      [90.0, 90],
+      //[92.00, 90] // works without this
+    ];
+    console.log("moving");
+    ctx.moveTo(line[0][0], line[0][1]);
+    for (let i = 1; i < line.length; i++) {
+      ctx.lineTo(line[i][0], line[i][1]);
+    }
+    console.log("stroking");
+    ctx.stroke();
+    console.log("done");
+    await save(img, "bug/198");
+  });
+});