1 files changed, 47 insertions, 0 deletions
diff --git a/dat.h b/dat.h
new file mode 100644
index 0000000..052270f
--- /dev/null
+++ b/dat.h
@@ -0,0 +1,47 @@
+enum
+{
+	TDOUBLE,
+	TPOINT,
+	TVECTOR,
+	TNORMAL,
+	TQUAT,
+};
+
+typedef struct Var Var;
+typedef struct Symbol Symbol;
+typedef struct Const Const;
+typedef struct Builtin Builtin;
+
+struct Var
+{
+	int type;
+	union {
+		double dval;
+		Point3 pval;
+		Quaternion qval;
+	};
+};
+
+struct Symbol
+{
+	char *name;
+	int type;
+	union {
+		Var var;
+		double val;		/* constant value */
+		double (*fn)(double);
+	} u;
+	Symbol *next;
+};
+
+struct Const
+{
+	char *name;
+	double val;
+};
+
+struct Builtin
+{
+	char *name;
+	double (*fn)();
+};