Add missing types.h and fix Makefile

Makefile

@@ -15,7 +15,7 @@ CFLAGS += -O0 -g3
 endif
 
 TARGET = drow-engine
-HEADERS = err.h parser.h
+HEADERS = err.h parser.h types.h
 OBJECTS = main.o parser.o
 INCS = -I.
 

types.h

@@ -0,0 +1,63 @@
+#ifndef _DROW_ENGINE_TYPES_H
+#define _DROW_ENGINE_TYPES_H
+
+
+/**
+ * Standard file buffer
+ */
+#define STD_FILE_BUF 4096
+
+
+typedef struct HE_edge HE_edge;
+typedef struct HE_vert HE_vert;
+typedef struct HE_face HE_face;
+
+/**
+ * Represents a half-edge.
+ */
+struct HE_edge {
+	/**
+	 * Start-vertex of the halfe-edge.
+	 */
+	HE_vert *vert;
+	/**
+	 * Oppositely oriented adjacent half-edge.
+	 */
+	HE_edge *pair;
+	/**
+	 * Face the half-edge borders.
+	 */
+	HE_face *face;
+	/**
+	 * Next half-edge around the face.
+	 */
+	HE_edge *next;
+};
+
+/**
+ * Represents a vertex with a random attached
+ * hald-edge.
+ */
+struct HE_vert {
+	float x;
+	float y;
+	float z;
+
+	/**
+	 * One of the half-edges emanating from the vertex.
+	 */
+	HE_edge *edge;
+};
+
+/**
+ * Represents a face
+ */
+struct HE_face {
+	/**
+	 * One of the half-edges bordering the face.
+	 */
+	HE_edge *edge;
+};
+
+
+#endif /* _DROW_ENGINE_TYPES_H */