init

src/helpers.odin

@@ -0,0 +1,41 @@
+// generic odin helpers
+
+package game
+
+import "core:intrinsics"
+import "core:reflect"
+import "core:strings"
+
+increase_or_wrap_enum :: proc(e: $T) -> T {
+	ei := int(e) + 1
+
+	if ei >= len(T) {
+		ei = 0
+	}
+
+	return T(ei)
+}
+
+union_type :: proc(a: any) -> typeid {
+	return reflect.union_variant_typeid(a)
+}
+
+temp_cstring :: proc(s: string) -> cstring {
+	return strings.clone_to_cstring(s, context.temp_allocator)
+}
+
+// There is a remap in core:math but it doesn't clamp in the new range, which I
+// always want.
+remap :: proc "contextless" (
+	old_value, old_min, old_max, new_min, new_max: $T,
+) -> (
+	x: T,
+) where intrinsics.type_is_numeric(T),
+	!intrinsics.type_is_array(T) {
+	old_range := old_max - old_min
+	new_range := new_max - new_min
+	if old_range == 0 {
+		return new_range / 2
+	}
+	return clamp(((old_value - old_min) / old_range) * new_range + new_min, new_min, new_max)
+}