Add gravel/sand/silt

media/attribution.js

@@ -578,6 +578,7 @@ const attributionData = {
                 { name: "beer-bottle.svg", source: null },
                 { name: "circle.svg", source: null },
                 { name: "pencil.svg", source: null },
+                { name: "pebble.svg", source: null },
             ],
             authors: [
                 "chemicalcrux"

media/objects/pebble.svg

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Generator: Adobe Illustrator 24.0.2, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
+<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
+	 viewBox="0 0 79.02 45.91" style="enable-background:new 0 0 79.02 45.91;" xml:space="preserve">
+<path d="M0.01,25.79c0,0,7.5,1.5,9,3s6.5,7.5,8,8s15-5,16-5s1.5,7.5,6,12s24.5,0.5,29,0s10.5-17.5,11-25s-26.5-17.5-27-18
+	s-32.5-1.5-33,0s-19.5,14.5-19,15C0.51,16.29,0.01,25.79,0.01,25.79z"/>
+</svg>

presets/objects.js

@@ -257,6 +257,33 @@ function makeObjects() {
             }
         )
     });
+
+    results.push({
+        name: "Pebbles",
+        constructor: () => makeObject(
+            "Pebbles",
+            {
+                gravelGrain: {
+                    height: math.unit(20, "mm"),
+                    image: { source: "./media/objects/pebble.svg" },
+                    name: "Grain of gravel",
+                    rename: true
+                },
+                sandGrain: {
+                    height: math.unit(0.5, "mm"),
+                    image: { source: "./media/objects/pebble.svg" },
+                    name: "Grain of sand",
+                    rename: true
+                },
+                siltGrain: {
+                    height: math.unit(0.03, "mm"),
+                    image: { source: "./media/objects/pebble.svg" },
+                    name: "Grain of silt",
+                    rename: true
+                },
+            }
+        )
+    });
     
     results.sort((b1, b2) => {
         e1 = b1.constructor();