1 files changed, 9 insertions, 0 deletions
diff --git a/include/kalmia.h b/include/kalmia.h
index d01fb5d..73d5df3 100644
--- a/include/kalmia.h
+++ b/include/kalmia.h
@@ -45,6 +45,8 @@
 #ifndef KALMIA_H
 #define KALMIA_H
 
+#include <stddef.h>
+
 /* kalmia uses semantic versioning (semver.org) */
 #define KALMIA_VERSION_MAJOR 0
 #define KALMIA_VERSION_MINOR 0
@@ -60,6 +62,13 @@
 /* format data structures */
 
 typedef double ka_matrix_t[16];
+typedef struct ka_node_t {
+	ka_matrix_t transform;
+} ka_node_t;
 
+typedef struct kalmia_t {
+	size_t n_nodes, n_nodes_max;
+	ka_node_t *node;
+} kalmia_t;
 
 #endif