feat:setCursor and abs

3 files changed, 25 insertions, 0 deletions

diff --git a/src/engine.zig b/src/engine.zig
index 3c22ae5..bc39f55 100644
--- a/src/engine.zig
+++ b/src/engine.zig
@@ -67,3 +67,11 @@ pub const Color = struct {
         return Color.fromVec(out);
     }
 };
+
+pub const Cursor = enum(u8) {
+    pointer,
+    grab,
+    grabbing,
+};
+
+pub extern fn setCursor(cursor: Cursor) void;
diff --git a/src/math.zig b/src/math.zig
index a649b1f..ab8c263 100644
--- a/src/math.zig
+++ b/src/math.zig
@@ -47,3 +47,7 @@ pub fn maxInt(comptime T: type) comptime_int {
     if (bit_count == 0) return 0;
     return (1 << (bit_count - @intFromBool(info.Int.signedness == .signed))) - 1;
 }
+
+pub fn abs(v: anytype) @TypeOf(v) {
+    if (v < 0) return -v else return v;
+}
diff --git a/src/shell/shell.html b/src/shell/shell.html
index 7f91847..9c93f99 100644
--- a/src/shell/shell.html
+++ b/src/shell/shell.html
@@ -103,6 +103,18 @@
             keyRegistry.set(code, list);
         };
 
+        const cursors = {
+            0: "default",
+            1: "grab",
+            2: "grabbing",
+        };
+        const setCursor = (c_idx) => {
+           const c = cursors[c_idx];
+            if (c) {
+                canvas.style.cursor = c;
+            }
+        };
+
         const importObject = {
             env: {
                 ...webgl,
@@ -110,6 +122,7 @@
                 rand,
                 loadTexture,
                 registerKeyInput,
+                setCursor,
             },
         };