add basic recursive aiNode push

6 files changed, 742 insertions, 573 deletions

diff --git a/src/import/CMakeLists.txt b/src/import/CMakeLists.txt
index fc35779..5b9238b 100644
--- a/src/import/CMakeLists.txt
+++ b/src/import/CMakeLists.txt
@@ -7,4 +7,6 @@ target_sources(honey PUBLIC
 
 target_sources(test PUBLIC
 	${CMAKE_CURRENT_LIST_DIR}/import.test.c
+	${CMAKE_CURRENT_LIST_DIR}/import_mesh.test.c
+	${CMAKE_CURRENT_LIST_DIR}/import_node.test.c
 )
diff --git a/src/import/import.c b/src/import/import.c
index d58de0f..400f1d9 100644
--- a/src/import/import.c
+++ b/src/import/import.c
@@ -4,7 +4,7 @@
 #include "import.h"
 
 
-void push_vector(lua_State *L, struct aiVector3D vec)
+static void push_vector(lua_State *L, struct aiVector3D vec)
 {
 	hs_create_table(L,
 		hs_str_num("x", vec.x),
@@ -14,7 +14,7 @@ void push_vector(lua_State *L, struct aiVector3D vec)
 }
 
 
-void push_face(lua_State *L, struct aiFace face)
+static void push_face(lua_State *L, struct aiFace face)
 {
 	lua_createtable(L, face.mNumIndices, 0);
 	int tbl = lua_gettop(L);
@@ -27,7 +27,7 @@ void push_face(lua_State *L, struct aiFace face)
 }
 
 
-void push_aistring(lua_State *L, struct aiString str)
+static void push_aistring(lua_State *L, struct aiString str)
 {
 	lua_pushstring(L, str.data);
 }
@@ -57,7 +57,7 @@ void push_aistring(lua_State *L, struct aiString str)
  * mPrimitiveTypes
  * mTextureCoordsNames
  */
-void push_mesh(lua_State *L, struct aiMesh mesh)
+static void push_mesh(lua_State *L, struct aiMesh mesh)
 {
 	/* --=== create mesh table ===-- */
 	lua_createtable(L, 0, 1);
@@ -196,3 +196,32 @@ void push_mesh(lua_State *L, struct aiMesh mesh)
 	/* --=== clean up ===-- */
 	lua_pop(L, pop_count);
 }
+
+
+static void push_node(lua_State *L, struct aiNode *node)
+{
+	lua_createtable(L, 0, 0);
+	int nodetbl = lua_gettop(L);
+
+	int pop_count = 0;
+	
+	if (node->mMeshes != NULL) {
+		lua_createtable(L, node->mNumMeshes, 0);
+		int meshes = lua_gettop(L);
+		for (int i=0; i<node->mNumMeshes; i++) {
+			lua_pushinteger(L, node->mMeshes[i]+1);
+			lua_rawseti(L, meshes, i+1);
+		}
+		lua_setfield(L, nodetbl, "meshes");
+	}
+
+	if (node->mChildren != NULL) {
+		lua_createtable(L, node->mNumChildren, 0);
+		int children = lua_gettop(L);
+		for (int i=0; i<node->mNumChildren; i++) {
+			push_node(L, node->mChildren[i]);
+			lua_rawseti(L, children, i+1);
+		}
+		lua_setfield(L, nodetbl, "children");
+	}
+}
diff --git a/src/import/import.test.c b/src/import/import.test.c
index bd15205..558398a 100644
--- a/src/import/import.test.c
+++ b/src/import/import.test.c
@@ -1,573 +1,5 @@
-#include <string.h>
-#include <lua.h>
-#include <lauxlib.h>
-#include <honeysuckle.h>
 #include "test/honey-test.h"
-
-
-#include "import.c"
-
-
-void test_push_vector()
-{
-	lua_State *L = luaL_newstate();
-	struct aiVector3D v;
-	v.x = 1.5;
-	v.y = 2.0;
-	v.z = 3.6;
-
-	push_vector(L, v);
-
-	lily_assert_int_equal(lua_type(L, -1), LUA_TTABLE);
-
-	lua_getfield(L, -1, "x");
-	lily_assert_int_equal(lua_type(L, -1), LUA_TNUMBER);
-	lily_assert_float_equal(lua_tonumber(L, -1), 1.5, 0.1);
-	lua_pop(L, 1);
-
-	lua_getfield(L, -1, "y");
-	lily_assert_int_equal(lua_type(L, -1), LUA_TNUMBER);
-	lily_assert_float_equal(lua_tonumber(L, -1), 2.0, 0.1);
-	lua_pop(L, 1);
-
-	lua_getfield(L, -1, "z");
-	lily_assert_int_equal(lua_type(L, -1), LUA_TNUMBER);
-	lily_assert_float_equal(lua_tonumber(L, -1), 3.6, 0.1);
-	lua_pop(L, 1);
-
-	lua_close(L);
-}
-
-
-void test_push_face()
-{
-	lua_State *L = luaL_newstate();
-	struct aiFace face;
-	int indices[] = { 0, 1, 2, 3, 4, 5 };
-	face.mIndices = indices;
-	face.mNumIndices = 6;
-
-	push_face(L, face);
-
-	lily_assert_int_equal(lua_type(L, -1), LUA_TTABLE);
-	int facetbl = lua_gettop(L);
-	lily_assert_int_equal(lua_objlen(L, facetbl), 6);
-
-	/* the numbers should be one higher because of lua's 1-indexing */
-	lua_rawgeti(L, facetbl, 1);
-	lily_assert_int_equal(lua_tointeger(L, -1), 1);
-	lua_rawgeti(L, facetbl, 2);
-	lily_assert_int_equal(lua_tointeger(L, -1), 2);
-	lua_rawgeti(L, facetbl, 3);
-	lily_assert_int_equal(lua_tointeger(L, -1), 3);
-	lua_rawgeti(L, facetbl, 4);
-	lily_assert_int_equal(lua_tointeger(L, -1), 4);
-	lua_rawgeti(L, facetbl, 5);
-	lily_assert_int_equal(lua_tointeger(L, -1), 5);
-	lua_rawgeti(L, facetbl, 6);
-	lily_assert_int_equal(lua_tointeger(L, -1), 6);
-
-	lua_close(L);
-}
-
-
-void test_push_aistring()
-{
-	lua_State *L = luaL_newstate();
-	struct aiString str;
-	strcpy(str.data, "hello, world!");
-
-	push_aistring(L, str);
-
-	lily_assert_int_equal(lua_type(L, -1), LUA_TSTRING);
-	lily_assert_string_equal((char*) lua_tostring(L, -1), "hello, world!");
-
-	lua_close(L);
-}
-
-
-/* --===== mesh tests =====-- */
-
-
-void create_vertices(struct aiMesh *mesh);
-void test_vertices(lua_State *L, int meshtbl);
-
-void create_faces(struct aiMesh *mesh);
-void test_faces(lua_State *L, int meshtbl);
-
-void create_normals(struct aiMesh *mesh);
-void test_normals(lua_State *L, int meshtbl);
-
-void create_tangents(struct aiMesh *mesh);
-void test_tangents(lua_State *L, int meshtbl);
-
-void create_uvs(struct aiMesh *mesh);
-void test_uvs(lua_State *L, int meshtbl);
-
-void test_nil(lua_State *L, int meshtbl, const char *field);
-
-
-#define NUM_MESH_VERTICES 4
-#define NUM_MESH_FACES 2
-
-
-#define ALLOCATE_MEMORY() \
-	struct aiVector3D vertices[NUM_MESH_VERTICES]; \
-	mesh.mVertices = vertices; \
-	struct aiVector3D normals[NUM_MESH_VERTICES]; \
-	mesh.mNormals = normals; \
-	struct aiVector3D tangents[NUM_MESH_VERTICES]; \
-	struct aiVector3D bitangents[NUM_MESH_VERTICES]; \
-	mesh.mTangents = tangents; \
-	mesh.mBitangents = bitangents; \
-	struct aiVector3D uvs[AI_MAX_NUMBER_OF_TEXTURECOORDS * NUM_MESH_VERTICES]; \
-	for (int i=0; i<AI_MAX_NUMBER_OF_TEXTURECOORDS; i++) \
-		mesh.mTextureCoords[i] = uvs + (i*NUM_MESH_VERTICES); \
-	struct aiFace faces[NUM_MESH_FACES]; \
-	unsigned int index_array[3*NUM_MESH_FACES]; \
-	for (int i=0; i<NUM_MESH_FACES; i++) \
-		faces[i].mIndices = index_array + (3*i); \
-	mesh.mFaces = faces;
-
-
-
-void test_push_mesh()
-{
-	lua_State *L = luaL_newstate();
-	struct aiMesh mesh;
-	mesh.mNumVertices = NUM_MESH_VERTICES;
-	mesh.mNumFaces = 0;
-
-	/* allocate memory */
-	ALLOCATE_MEMORY();
-	mesh.mNormals = NULL;
-	mesh.mTangents = NULL;
-	mesh.mBitangents = NULL;
-	for (int i=0; i<AI_MAX_NUMBER_OF_TEXTURECOORDS; i++)
-		mesh.mTextureCoords[i] = NULL;
-
-	/* setup mesh */
-	create_vertices(&mesh);
-
-	/* push */	
-	int top_before = lua_gettop(L);
-	push_mesh(L, mesh);
-	int meshtbl = lua_gettop(L);
-
-	/* check output */
-	lily_assert_int_equal(lua_type(L, meshtbl), LUA_TTABLE);
-	lily_assert_int_equal(meshtbl - top_before, 1); /* make sure we cleaned up correctly */
-	test_vertices(L, meshtbl);
-	test_nil(L, meshtbl, "faces");
-
-	lua_close(L);
-}
-
-
-void test_push_mesh_faces()
-{
-	lua_State *L = luaL_newstate();
-	struct aiMesh mesh;
-	mesh.mNumVertices = NUM_MESH_VERTICES;
-	mesh.mNumFaces = NUM_MESH_FACES;
-
-	/* allocate memory */
-	ALLOCATE_MEMORY();
-	mesh.mNormals = NULL;
-	mesh.mTangents = NULL;
-	mesh.mBitangents = NULL;
-	for (int i=0; i<AI_MAX_NUMBER_OF_TEXTURECOORDS; i++)
-		mesh.mTextureCoords[i] = NULL;
-
-	/* setup mesh */
-	create_vertices(&mesh);
-	create_faces(&mesh);
-
-	/* push */	
-	int top_before = lua_gettop(L);
-	push_mesh(L, mesh);
-	int meshtbl = lua_gettop(L);
-
-	/* check output */
-	lily_assert_int_equal(lua_type(L, meshtbl), LUA_TTABLE);
-	lily_assert_int_equal(meshtbl - top_before, 1); /* make sure we cleaned up correctly */
-	test_vertices(L, meshtbl);
-	test_faces(L, meshtbl);
-
-	lua_close(L);
-}
-
-
-void test_push_mesh_normals()
-{
-	lua_State *L = luaL_newstate();
-	struct aiMesh mesh;
-	mesh.mNumVertices = NUM_MESH_VERTICES;
-	mesh.mNumFaces = NUM_MESH_FACES;
-
-	/* allocate memory */
-	ALLOCATE_MEMORY();
-	mesh.mTangents = NULL;
-	mesh.mBitangents = NULL;
-	for (int i=0; i<AI_MAX_NUMBER_OF_TEXTURECOORDS; i++)
-		mesh.mTextureCoords[i] = NULL;
-
-	/* setup mesh */
-	create_vertices(&mesh);
-	create_faces(&mesh);
-	create_normals(&mesh);
-
-	/* push */	
-	int top_before = lua_gettop(L);
-	push_mesh(L, mesh);
-	int meshtbl = lua_gettop(L);
-
-	/* check output */
-	lily_assert_int_equal(lua_type(L, meshtbl), LUA_TTABLE);
-	lily_assert_int_equal(meshtbl - top_before, 1); /* make sure we cleaned up correctly */
-	test_vertices(L, meshtbl);
-	test_faces(L, meshtbl);
-	test_normals(L, meshtbl);
-
-	lua_close(L);
-}
-
-
-void test_push_mesh_tangents()
-{
-	lua_State *L = luaL_newstate();
-	struct aiMesh mesh;
-	mesh.mNumVertices = NUM_MESH_VERTICES;
-	mesh.mNumFaces = NUM_MESH_FACES;
-
-	/* allocate memory */
-	ALLOCATE_MEMORY();
-	for (int i=0; i<AI_MAX_NUMBER_OF_TEXTURECOORDS; i++)
-		mesh.mTextureCoords[i] = NULL;
-
-	/* setup mesh */
-	create_vertices(&mesh);
-	create_faces(&mesh);
-	create_normals(&mesh);
-	create_tangents(&mesh);
-
-	/* push */	
-	int top_before = lua_gettop(L);
-	push_mesh(L, mesh);
-	int meshtbl = lua_gettop(L);
-
-	/* check output */
-	lily_assert_int_equal(lua_type(L, meshtbl), LUA_TTABLE);
-	lily_assert_int_equal(meshtbl - top_before, 1); /* make sure we cleaned up correctly */
-	test_vertices(L, meshtbl);
-	test_faces(L, meshtbl);
-	test_normals(L, meshtbl);
-	test_tangents(L, meshtbl);
-
-	lua_close(L);
-
-}
-
-
-void test_push_mesh_uvs()
-{
-	lua_State *L = luaL_newstate();
-	struct aiMesh mesh;
-	mesh.mNumVertices = NUM_MESH_VERTICES;
-	mesh.mNumFaces = NUM_MESH_FACES;
-
-	/* allocate memory */
-	ALLOCATE_MEMORY();
-
-	/* setup mesh */
-	create_vertices(&mesh);
-	create_faces(&mesh);
-	create_normals(&mesh);
-	create_tangents(&mesh);
-	create_uvs(&mesh);
-
-	/* push */	
-	int top_before = lua_gettop(L);
-	push_mesh(L, mesh);
-	int meshtbl = lua_gettop(L);
-
-	/* check output */
-	lily_assert_int_equal(lua_type(L, meshtbl), LUA_TTABLE);
-	lily_assert_int_equal(meshtbl - top_before, 1); /* make sure we cleaned up correctly */
-	test_vertices(L, meshtbl);
-	test_faces(L, meshtbl);
-	test_normals(L, meshtbl);
-	test_tangents(L, meshtbl);
-	test_uvs(L, meshtbl);
-
-	lua_close(L);
-
-}
-
-
-void create_vertices(struct aiMesh *mesh)
-{
-	mesh->mVertices[0] = (struct aiVector3D) { 0, 0, 0 };
-	mesh->mVertices[1] = (struct aiVector3D) { 0, 0, 1 };
-	mesh->mVertices[2] = (struct aiVector3D) { 1, 0, 0 };
-	mesh->mVertices[3] = (struct aiVector3D) { 1, 0, 1 };
-}
-
-
-static int check_vector(lua_State *L, int meshtbl, const char *field, int index, 
-                        float x, float y, float z)
-{
-	lua_getfield(L, meshtbl, field);
-	lily_assert(lua_type(L, -1) == LUA_TTABLE, "field '%s' is not a table!", field);
-	lua_rawgeti(L, -1, index);
-	lily_assert(lua_type(L, -1) == LUA_TTABLE, "%s[%d] is not a table!", field, index);
-
-	lua_getfield(L, -1, "x");
-	lily_assert(lua_type(L, -1) == LUA_TNUMBER, "%s[%d].x is not a number!", field, index);
-	float vx = lua_tonumber(L, -1);
-	lua_pop(L, 1);
-
-	lua_getfield(L, -1, "y");
-	lily_assert(lua_type(L, -1) == LUA_TNUMBER, "%s[%d].y is not a number!", field, index);
-	float vy = lua_tonumber(L, -1);
-	lua_pop(L, 1);
-
-	lua_getfield(L, -1, "z");
-	lily_assert(lua_type(L, -1) == LUA_TNUMBER, "%s[%d].z is not a number!", field, index);
-	float vz = lua_tonumber(L, -1);
-	lua_pop(L, 1);
-
-	lua_pop(L, 2);
-	lily_assert(
-		(fabs(vx - x) < 0.1) &&
-		(fabs(vy - y) < 0.1) &&
-		(fabs(vz - z) < 0.1),
-		"%s[%d] is [%f, %f, %f], but expected [%f, %f, %f]!",
-		field, index,
-		vx, vy, vz,
-		x, y, z
-	);
-}
-
-
-void test_vertices(lua_State *L, int meshtbl)
-{
-	check_vector(L, meshtbl, "vertices", 1, 0, 0, 0);
-	check_vector(L, meshtbl, "vertices", 2, 0, 0, 1);
-	check_vector(L, meshtbl, "vertices", 3, 1, 0, 0);
-	check_vector(L, meshtbl, "vertices", 4, 1, 0, 1);
-}
-
-
-static void setup_face(struct aiFace *face, int v0, int v1, int v2)
-{
-	face->mNumIndices = 3;
-	face->mIndices[0] = v0;
-	face->mIndices[1] = v1;
-	face->mIndices[2] = v2;
-}
-
-
-void create_faces(struct aiMesh *mesh)
-{
-	setup_face(mesh->mFaces + 0, 0, 1, 3);
-	setup_face(mesh->mFaces + 1, 0, 3, 2);
-}
-
-
-static int check_face(lua_State *L, int meshtbl, const char *field, int index, 
-                      int v0, int v1, int v2)
-{
-	lua_getfield(L, meshtbl, field);
-	lily_assert(lua_type(L, -1) == LUA_TTABLE, "field '%s' is not a table!", field);
-	lua_rawgeti(L, -1, index);
-	lily_assert(lua_type(L, -1) == LUA_TTABLE, "%s[%d] is not a table!", field, index);
-
-	lua_rawgeti(L, -1, 1);
-	lily_assert(lua_type(L, -1) == LUA_TNUMBER, "%s[%d][1] is not a number!", field, index);
-	int vv0 = lua_tointeger(L, -1);
-	lua_pop(L, 1);
-
-	lua_rawgeti(L, -1, 2);
-	lily_assert(lua_type(L, -1) == LUA_TNUMBER, "%s[%d][2] is not a number!", field, index);
-	int vv1 = lua_tointeger(L, -1);
-	lua_pop(L, 1);
-
-	lua_rawgeti(L, -1, 3);
-	lily_assert(lua_type(L, -1) == LUA_TNUMBER, "%s[%d][3] is not a number!", field, index);
-	int vv2 = lua_tointeger(L, -1);
-	lua_pop(L, 1);
-
-	lua_pop(L, 2);
-	lily_assert(
-		(v0 == vv0) &&
-		(v1 == vv1) &&
-		(v2 == vv2),
-		"%s[%d] is [%d, %d, %d], but expected [%d, %d, %d]!",
-		field, index,
-		vv0, vv1, vv2,
-		v0, v1, v2
-	);
-}
-
-
-void test_faces(lua_State *L, int meshtbl)
-{
-	check_face(L, meshtbl, "faces", 1, 1, 2, 4);
-	check_face(L, meshtbl, "faces", 2, 1, 4, 3);
-}
-
-
-void create_normals(struct aiMesh *mesh)
-{
-	/* these normals are deliberately not, uh, normalized
-	 * in order to distinguish them for the purposes of testing.
-	 * (this could also happen in real life -- assimp won't normalize
-	 * normals taken straight from the object file)
-	 */
-	mesh->mNormals[0] = (struct aiVector3D) { 0, 0.1, 0 };
-	mesh->mNormals[1] = (struct aiVector3D) { 0, 0.2, 0 };
-	mesh->mNormals[2] = (struct aiVector3D) { 0, 0.4, 0 };
-	mesh->mNormals[3] = (struct aiVector3D) { 0, 1.0, 0 };
-}
-
-
-void test_normals(lua_State *L, int meshtbl)
-{
-	check_vector(L, meshtbl, "normals", 1, 0, 0.1, 0);
-	check_vector(L, meshtbl, "normals", 2, 0, 0.2, 0);
-	check_vector(L, meshtbl, "normals", 3, 0, 0.4, 0);
-	check_vector(L, meshtbl, "normals", 4, 0, 1.0, 0);
-}
-
-
-void create_tangents(struct aiMesh *mesh)
-{
-	/* these tangents are not normalized -- see note in create_normals */
-	mesh->mTangents[0] = (struct aiVector3D) { 0.1, 0, 0 };
-	mesh->mTangents[1] = (struct aiVector3D) { 0.2, 0, 0 };
-	mesh->mTangents[2] = (struct aiVector3D) { 0.4, 0, 0 };
-	mesh->mTangents[3] = (struct aiVector3D) { 1.0, 0, 0 };
-
-	mesh->mBitangents[0] = (struct aiVector3D) { 0, 0, 0.1 };
-	mesh->mBitangents[1] = (struct aiVector3D) { 0, 0, 0.2 };
-	mesh->mBitangents[2] = (struct aiVector3D) { 0, 0, 0.4 };
-	mesh->mBitangents[3] = (struct aiVector3D) { 0, 0, 1.0 };
-}
-
-
-void test_tangents(lua_State *L, int meshtbl)
-{
-	check_vector(L, meshtbl, "tangents", 1, 0.1, 0, 0);
-	check_vector(L, meshtbl, "tangents", 2, 0.2, 0, 0);
-	check_vector(L, meshtbl, "tangents", 3, 0.4, 0, 0);
-	check_vector(L, meshtbl, "tangents", 4, 1.0, 0, 0);
-
-	check_vector(L, meshtbl, "bitangents", 1, 0, 0, 0.1);
-	check_vector(L, meshtbl, "bitangents", 2, 0, 0, 0.2);
-	check_vector(L, meshtbl, "bitangents", 3, 0, 0, 0.4);
-	check_vector(L, meshtbl, "bitangents", 4, 0, 0, 1.0);
-}
-
-
-void create_uvs(struct aiMesh *mesh)
-{
-	mesh->mNumUVComponents[0] = 2;
-	mesh->mTextureCoords[0][0] = (struct aiVector3D) { 0, 0, 0 };
-	mesh->mTextureCoords[0][1] = (struct aiVector3D) { 0, 1, 0 };
-	mesh->mTextureCoords[0][2] = (struct aiVector3D) { 1, 0, 0 };
-	mesh->mTextureCoords[0][3] = (struct aiVector3D) { 1, 1, 0 };
-
-	mesh->mNumUVComponents[1] = 1;
-	mesh->mTextureCoords[1][0] = (struct aiVector3D) { 0.0, 0, 0 };
-	mesh->mTextureCoords[1][1] = (struct aiVector3D) { 0.2, 0, 0 };
-	mesh->mTextureCoords[1][2] = (struct aiVector3D) { 0.4, 0, 0 };
-	mesh->mTextureCoords[1][3] = (struct aiVector3D) { 0.8, 0, 0 };
-
-	for (int i=2; i<AI_MAX_NUMBER_OF_TEXTURECOORDS; i++)
-		mesh->mTextureCoords[i] = NULL;
-}
-
-
-static int check_uv(lua_State *L, int meshtbl, int channel, int index, 
-                        float x, float y, float z)
-{
-	lua_getfield(L, meshtbl, "uvs");
-	lily_assert(lua_type(L, -1) == LUA_TTABLE, "field 'uvs' is not a table!");
-	lua_rawgeti(L, -1, channel);
-	lily_assert(lua_type(L, -1) == LUA_TTABLE, "uvs[%d] is not a table!", channel);
-	lua_rawgeti(L, -1, index);
-	lily_assert(lua_type(L, -1) == LUA_TTABLE, "uvs[%d][%d] is not a table!", channel, index);
-
-	lua_getfield(L, -1, "x");
-	lily_assert(lua_type(L, -1) == LUA_TNUMBER, "uvs[%d][%d].x is not a number!", channel, index);
-	float vx = lua_tonumber(L, -1);
-	lua_pop(L, 1);
-
-	lua_getfield(L, -1, "y");
-	lily_assert(lua_type(L, -1) == LUA_TNUMBER, "uvs[%d][%d].y is not a number!", channel, index);
-	float vy = lua_tonumber(L, -1);
-	lua_pop(L, 1);
-
-	lua_getfield(L, -1, "z");
-	lily_assert(lua_type(L, -1) == LUA_TNUMBER, "uvs[%d][%d].z is not a number!", channel, index);
-	float vz = lua_tonumber(L, -1);
-	lua_pop(L, 1);
-
-	lua_pop(L, 3);
-	lily_assert(
-		(fabs(vx - x) < 0.1) &&
-		(fabs(vy - y) < 0.1) &&
-		(fabs(vz - z) < 0.1),
-		"uvs[%d][%d] is [%f, %f, %f], but expected [%f, %f, %f]!",
-		channel, index,
-		vx, vy, vz,
-		x, y, z
-	);
-}
-
-
-void test_uvs(lua_State *L, int meshtbl)
-{
-	lua_getfield(L, meshtbl, "numUvComponents");
-	lily_assert(lua_type(L, -1) == LUA_TTABLE, "field 'numUvComponents' is not a table!");
-	lua_rawgeti(L, -1, 1);
-	lily_assert_int_equal(lua_tointeger(L, -1), 2);
-	lua_pop(L, 1);
-	lua_rawgeti(L, -1, 2);
-	lily_assert_int_equal(lua_tointeger(L, -1), 1);
-	lua_pop(L, 1);
-
-	check_uv(L, meshtbl, 1, 1, 0, 0, 0);
-	check_uv(L, meshtbl, 1, 2, 0, 1, 0);
-	check_uv(L, meshtbl, 1, 3, 1, 0, 0);
-	check_uv(L, meshtbl, 1, 4, 1, 1, 0);
-
-	check_uv(L, meshtbl, 2, 1, 0.0, 0, 0);
-	check_uv(L, meshtbl, 2, 2, 0.2, 0, 0);
-	check_uv(L, meshtbl, 2, 3, 0.4, 0, 0);
-	check_uv(L, meshtbl, 2, 4, 0.8, 0, 0);
-
-	lua_getfield(L, meshtbl, "uvs");
-	int uvtbl = lua_gettop(L);
-	for (int i=2; i<AI_MAX_NUMBER_OF_TEXTURECOORDS; i++) {
-		lua_rawgeti(L, uvtbl, i+1);
-		lily_assert(lua_type(L, -1) == LUA_TNIL, "uv channel %d is non-nil!", i+1);
-		lua_pop(L, 1);
-	}
-	lua_pop(L, 1);
-}
-
-void test_nil(lua_State *L, int meshtbl, const char *field)
-{
-	lua_getfield(L, meshtbl, field);
-	lily_assert(lua_type(L, -1) == LUA_TNIL, "field '%s' is not nil!");
-	lua_pop(L, 1);
-}
-
-
-/* --===== end mesh tests =====-- */
-
+#include "import.test.h"
 
 void suite_import()
 {
@@ -580,4 +12,6 @@ void suite_import()
 	lily_run_test(test_push_mesh_normals);
 	lily_run_test(test_push_mesh_tangents);
 	lily_run_test(test_push_mesh_uvs);
+
+	lily_run_test(test_push_node);
 }
diff --git a/src/import/import.test.h b/src/import/import.test.h
new file mode 100644
index 0000000..5aafdb3
--- /dev/null
+++ b/src/import/import.test.h
@@ -0,0 +1,18 @@
+#ifndef HONEY_IMPORT_TEST_H
+#define HONEY_IMPORT_TEST_H
+
+void test_push_vector();
+void test_push_face();
+void test_push_aistring();
+
+/* mesh tests */
+void test_push_mesh();
+void test_push_mesh_faces();
+void test_push_mesh_normals();
+void test_push_mesh_tangents();
+void test_push_mesh_uvs();
+
+/* node tests */
+void test_push_node();
+
+#endif
diff --git a/src/import/import_mesh.test.c b/src/import/import_mesh.test.c
new file mode 100644
index 0000000..07400fd
--- /dev/null
+++ b/src/import/import_mesh.test.c
@@ -0,0 +1,570 @@
+#include <string.h>
+#include <lua.h>
+#include <lauxlib.h>
+#include <honeysuckle.h>
+#include "test/honey-test.h"
+#include "import.test.h"
+
+
+#include "import.c"
+
+
+void test_push_vector()
+{
+	lua_State *L = luaL_newstate();
+	struct aiVector3D v;
+	v.x = 1.5;
+	v.y = 2.0;
+	v.z = 3.6;
+
+	push_vector(L, v);
+
+	lily_assert_int_equal(lua_type(L, -1), LUA_TTABLE);
+
+	lua_getfield(L, -1, "x");
+	lily_assert_int_equal(lua_type(L, -1), LUA_TNUMBER);
+	lily_assert_float_equal(lua_tonumber(L, -1), 1.5, 0.1);
+	lua_pop(L, 1);
+
+	lua_getfield(L, -1, "y");
+	lily_assert_int_equal(lua_type(L, -1), LUA_TNUMBER);
+	lily_assert_float_equal(lua_tonumber(L, -1), 2.0, 0.1);
+	lua_pop(L, 1);
+
+	lua_getfield(L, -1, "z");
+	lily_assert_int_equal(lua_type(L, -1), LUA_TNUMBER);
+	lily_assert_float_equal(lua_tonumber(L, -1), 3.6, 0.1);
+	lua_pop(L, 1);
+
+	lua_close(L);
+}
+
+
+void test_push_face()
+{
+	lua_State *L = luaL_newstate();
+	struct aiFace face;
+	int indices[] = { 0, 1, 2, 3, 4, 5 };
+	face.mIndices = indices;
+	face.mNumIndices = 6;
+
+	push_face(L, face);
+
+	lily_assert_int_equal(lua_type(L, -1), LUA_TTABLE);
+	int facetbl = lua_gettop(L);
+	lily_assert_int_equal(lua_objlen(L, facetbl), 6);
+
+	/* the numbers should be one higher because of lua's 1-indexing */
+	lua_rawgeti(L, facetbl, 1);
+	lily_assert_int_equal(lua_tointeger(L, -1), 1);
+	lua_rawgeti(L, facetbl, 2);
+	lily_assert_int_equal(lua_tointeger(L, -1), 2);
+	lua_rawgeti(L, facetbl, 3);
+	lily_assert_int_equal(lua_tointeger(L, -1), 3);
+	lua_rawgeti(L, facetbl, 4);
+	lily_assert_int_equal(lua_tointeger(L, -1), 4);
+	lua_rawgeti(L, facetbl, 5);
+	lily_assert_int_equal(lua_tointeger(L, -1), 5);
+	lua_rawgeti(L, facetbl, 6);
+	lily_assert_int_equal(lua_tointeger(L, -1), 6);
+
+	lua_close(L);
+}
+
+
+void test_push_aistring()
+{
+	lua_State *L = luaL_newstate();
+	struct aiString str;
+	strcpy(str.data, "hello, world!");
+
+	push_aistring(L, str);
+
+	lily_assert_int_equal(lua_type(L, -1), LUA_TSTRING);
+	lily_assert_string_equal((char*) lua_tostring(L, -1), "hello, world!");
+
+	lua_close(L);
+}
+
+
+/* --===== mesh tests =====-- */
+
+
+void create_vertices(struct aiMesh *mesh);
+void test_vertices(lua_State *L, int meshtbl);
+
+void create_faces(struct aiMesh *mesh);
+void test_faces(lua_State *L, int meshtbl);
+
+void create_normals(struct aiMesh *mesh);
+void test_normals(lua_State *L, int meshtbl);
+
+void create_tangents(struct aiMesh *mesh);
+void test_tangents(lua_State *L, int meshtbl);
+
+void create_uvs(struct aiMesh *mesh);
+void test_uvs(lua_State *L, int meshtbl);
+
+void test_nil(lua_State *L, int meshtbl, const char *field);
+
+
+#define NUM_MESH_VERTICES 4
+#define NUM_MESH_FACES 2
+
+
+#define ALLOCATE_MEMORY() \
+	struct aiVector3D vertices[NUM_MESH_VERTICES]; \
+	mesh.mVertices = vertices; \
+	struct aiVector3D normals[NUM_MESH_VERTICES]; \
+	mesh.mNormals = normals; \
+	struct aiVector3D tangents[NUM_MESH_VERTICES]; \
+	struct aiVector3D bitangents[NUM_MESH_VERTICES]; \
+	mesh.mTangents = tangents; \
+	mesh.mBitangents = bitangents; \
+	struct aiVector3D uvs[AI_MAX_NUMBER_OF_TEXTURECOORDS * NUM_MESH_VERTICES]; \
+	for (int i=0; i<AI_MAX_NUMBER_OF_TEXTURECOORDS; i++) \
+		mesh.mTextureCoords[i] = uvs + (i*NUM_MESH_VERTICES); \
+	struct aiFace faces[NUM_MESH_FACES]; \
+	unsigned int index_array[3*NUM_MESH_FACES]; \
+	for (int i=0; i<NUM_MESH_FACES; i++) \
+		faces[i].mIndices = index_array + (3*i); \
+	mesh.mFaces = faces;
+
+
+
+void test_push_mesh()
+{
+	lua_State *L = luaL_newstate();
+	struct aiMesh mesh;
+	mesh.mNumVertices = NUM_MESH_VERTICES;
+	mesh.mNumFaces = 0;
+
+	/* allocate memory */
+	ALLOCATE_MEMORY();
+	mesh.mNormals = NULL;
+	mesh.mTangents = NULL;
+	mesh.mBitangents = NULL;
+	for (int i=0; i<AI_MAX_NUMBER_OF_TEXTURECOORDS; i++)
+		mesh.mTextureCoords[i] = NULL;
+
+	/* setup mesh */
+	create_vertices(&mesh);
+
+	/* push */	
+	int top_before = lua_gettop(L);
+	push_mesh(L, mesh);
+	int meshtbl = lua_gettop(L);
+
+	/* check output */
+	lily_assert_int_equal(lua_type(L, meshtbl), LUA_TTABLE);
+	lily_assert_int_equal(meshtbl - top_before, 1); /* make sure we cleaned up correctly */
+	test_vertices(L, meshtbl);
+	test_nil(L, meshtbl, "faces");
+
+	lua_close(L);
+}
+
+
+void test_push_mesh_faces()
+{
+	lua_State *L = luaL_newstate();
+	struct aiMesh mesh;
+	mesh.mNumVertices = NUM_MESH_VERTICES;
+	mesh.mNumFaces = NUM_MESH_FACES;
+
+	/* allocate memory */
+	ALLOCATE_MEMORY();
+	mesh.mNormals = NULL;
+	mesh.mTangents = NULL;
+	mesh.mBitangents = NULL;
+	for (int i=0; i<AI_MAX_NUMBER_OF_TEXTURECOORDS; i++)
+		mesh.mTextureCoords[i] = NULL;
+
+	/* setup mesh */
+	create_vertices(&mesh);
+	create_faces(&mesh);
+
+	/* push */	
+	int top_before = lua_gettop(L);
+	push_mesh(L, mesh);
+	int meshtbl = lua_gettop(L);
+
+	/* check output */
+	lily_assert_int_equal(lua_type(L, meshtbl), LUA_TTABLE);
+	lily_assert_int_equal(meshtbl - top_before, 1); /* make sure we cleaned up correctly */
+	test_vertices(L, meshtbl);
+	test_faces(L, meshtbl);
+
+	lua_close(L);
+}
+
+
+void test_push_mesh_normals()
+{
+	lua_State *L = luaL_newstate();
+	struct aiMesh mesh;
+	mesh.mNumVertices = NUM_MESH_VERTICES;
+	mesh.mNumFaces = NUM_MESH_FACES;
+
+	/* allocate memory */
+	ALLOCATE_MEMORY();
+	mesh.mTangents = NULL;
+	mesh.mBitangents = NULL;
+	for (int i=0; i<AI_MAX_NUMBER_OF_TEXTURECOORDS; i++)
+		mesh.mTextureCoords[i] = NULL;
+
+	/* setup mesh */
+	create_vertices(&mesh);
+	create_faces(&mesh);
+	create_normals(&mesh);
+
+	/* push */	
+	int top_before = lua_gettop(L);
+	push_mesh(L, mesh);
+	int meshtbl = lua_gettop(L);
+
+	/* check output */
+	lily_assert_int_equal(lua_type(L, meshtbl), LUA_TTABLE);
+	lily_assert_int_equal(meshtbl - top_before, 1); /* make sure we cleaned up correctly */
+	test_vertices(L, meshtbl);
+	test_faces(L, meshtbl);
+	test_normals(L, meshtbl);
+
+	lua_close(L);
+}
+
+
+void test_push_mesh_tangents()
+{
+	lua_State *L = luaL_newstate();
+	struct aiMesh mesh;
+	mesh.mNumVertices = NUM_MESH_VERTICES;
+	mesh.mNumFaces = NUM_MESH_FACES;
+
+	/* allocate memory */
+	ALLOCATE_MEMORY();
+	for (int i=0; i<AI_MAX_NUMBER_OF_TEXTURECOORDS; i++)
+		mesh.mTextureCoords[i] = NULL;
+
+	/* setup mesh */
+	create_vertices(&mesh);
+	create_faces(&mesh);
+	create_normals(&mesh);
+	create_tangents(&mesh);
+
+	/* push */	
+	int top_before = lua_gettop(L);
+	push_mesh(L, mesh);
+	int meshtbl = lua_gettop(L);
+
+	/* check output */
+	lily_assert_int_equal(lua_type(L, meshtbl), LUA_TTABLE);
+	lily_assert_int_equal(meshtbl - top_before, 1); /* make sure we cleaned up correctly */
+	test_vertices(L, meshtbl);
+	test_faces(L, meshtbl);
+	test_normals(L, meshtbl);
+	test_tangents(L, meshtbl);
+
+	lua_close(L);
+
+}
+
+
+void test_push_mesh_uvs()
+{
+	lua_State *L = luaL_newstate();
+	struct aiMesh mesh;
+	mesh.mNumVertices = NUM_MESH_VERTICES;
+	mesh.mNumFaces = NUM_MESH_FACES;
+
+	/* allocate memory */
+	ALLOCATE_MEMORY();
+
+	/* setup mesh */
+	create_vertices(&mesh);
+	create_faces(&mesh);
+	create_normals(&mesh);
+	create_tangents(&mesh);
+	create_uvs(&mesh);
+
+	/* push */	
+	int top_before = lua_gettop(L);
+	push_mesh(L, mesh);
+	int meshtbl = lua_gettop(L);
+
+	/* check output */
+	lily_assert_int_equal(lua_type(L, meshtbl), LUA_TTABLE);
+	lily_assert_int_equal(meshtbl - top_before, 1); /* make sure we cleaned up correctly */
+	test_vertices(L, meshtbl);
+	test_faces(L, meshtbl);
+	test_normals(L, meshtbl);
+	test_tangents(L, meshtbl);
+	test_uvs(L, meshtbl);
+
+	lua_close(L);
+
+}
+
+
+void create_vertices(struct aiMesh *mesh)
+{
+	mesh->mVertices[0] = (struct aiVector3D) { 0, 0, 0 };
+	mesh->mVertices[1] = (struct aiVector3D) { 0, 0, 1 };
+	mesh->mVertices[2] = (struct aiVector3D) { 1, 0, 0 };
+	mesh->mVertices[3] = (struct aiVector3D) { 1, 0, 1 };
+}
+
+
+static int check_vector(lua_State *L, int meshtbl, const char *field, int index, 
+                        float x, float y, float z)
+{
+	lua_getfield(L, meshtbl, field);
+	lily_assert(lua_type(L, -1) == LUA_TTABLE, "field '%s' is not a table!", field);
+	lua_rawgeti(L, -1, index);
+	lily_assert(lua_type(L, -1) == LUA_TTABLE, "%s[%d] is not a table!", field, index);
+
+	lua_getfield(L, -1, "x");
+	lily_assert(lua_type(L, -1) == LUA_TNUMBER, "%s[%d].x is not a number!", field, index);
+	float vx = lua_tonumber(L, -1);
+	lua_pop(L, 1);
+
+	lua_getfield(L, -1, "y");
+	lily_assert(lua_type(L, -1) == LUA_TNUMBER, "%s[%d].y is not a number!", field, index);
+	float vy = lua_tonumber(L, -1);
+	lua_pop(L, 1);
+
+	lua_getfield(L, -1, "z");
+	lily_assert(lua_type(L, -1) == LUA_TNUMBER, "%s[%d].z is not a number!", field, index);
+	float vz = lua_tonumber(L, -1);
+	lua_pop(L, 1);
+
+	lua_pop(L, 2);
+	lily_assert(
+		(fabs(vx - x) < 0.1) &&
+		(fabs(vy - y) < 0.1) &&
+		(fabs(vz - z) < 0.1),
+		"%s[%d] is [%f, %f, %f], but expected [%f, %f, %f]!",
+		field, index,
+		vx, vy, vz,
+		x, y, z
+	);
+}
+
+
+void test_vertices(lua_State *L, int meshtbl)
+{
+	check_vector(L, meshtbl, "vertices", 1, 0, 0, 0);
+	check_vector(L, meshtbl, "vertices", 2, 0, 0, 1);
+	check_vector(L, meshtbl, "vertices", 3, 1, 0, 0);
+	check_vector(L, meshtbl, "vertices", 4, 1, 0, 1);
+}
+
+
+static void setup_face(struct aiFace *face, int v0, int v1, int v2)
+{
+	face->mNumIndices = 3;
+	face->mIndices[0] = v0;
+	face->mIndices[1] = v1;
+	face->mIndices[2] = v2;
+}
+
+
+void create_faces(struct aiMesh *mesh)
+{
+	setup_face(mesh->mFaces + 0, 0, 1, 3);
+	setup_face(mesh->mFaces + 1, 0, 3, 2);
+}
+
+
+static int check_face(lua_State *L, int meshtbl, const char *field, int index, 
+                      int v0, int v1, int v2)
+{
+	lua_getfield(L, meshtbl, field);
+	lily_assert(lua_type(L, -1) == LUA_TTABLE, "field '%s' is not a table!", field);
+	lua_rawgeti(L, -1, index);
+	lily_assert(lua_type(L, -1) == LUA_TTABLE, "%s[%d] is not a table!", field, index);
+
+	lua_rawgeti(L, -1, 1);
+	lily_assert(lua_type(L, -1) == LUA_TNUMBER, "%s[%d][1] is not a number!", field, index);
+	int vv0 = lua_tointeger(L, -1);
+	lua_pop(L, 1);
+
+	lua_rawgeti(L, -1, 2);
+	lily_assert(lua_type(L, -1) == LUA_TNUMBER, "%s[%d][2] is not a number!", field, index);
+	int vv1 = lua_tointeger(L, -1);
+	lua_pop(L, 1);
+
+	lua_rawgeti(L, -1, 3);
+	lily_assert(lua_type(L, -1) == LUA_TNUMBER, "%s[%d][3] is not a number!", field, index);
+	int vv2 = lua_tointeger(L, -1);
+	lua_pop(L, 1);
+
+	lua_pop(L, 2);
+	lily_assert(
+		(v0 == vv0) &&
+		(v1 == vv1) &&
+		(v2 == vv2),
+		"%s[%d] is [%d, %d, %d], but expected [%d, %d, %d]!",
+		field, index,
+		vv0, vv1, vv2,
+		v0, v1, v2
+	);
+}
+
+
+void test_faces(lua_State *L, int meshtbl)
+{
+	check_face(L, meshtbl, "faces", 1, 1, 2, 4);
+	check_face(L, meshtbl, "faces", 2, 1, 4, 3);
+}
+
+
+void create_normals(struct aiMesh *mesh)
+{
+	/* these normals are deliberately not, uh, normalized
+	 * in order to distinguish them for the purposes of testing.
+	 * (this could also happen in real life -- assimp won't normalize
+	 * normals taken straight from the object file)
+	 */
+	mesh->mNormals[0] = (struct aiVector3D) { 0, 0.1, 0 };
+	mesh->mNormals[1] = (struct aiVector3D) { 0, 0.2, 0 };
+	mesh->mNormals[2] = (struct aiVector3D) { 0, 0.4, 0 };
+	mesh->mNormals[3] = (struct aiVector3D) { 0, 1.0, 0 };
+}
+
+
+void test_normals(lua_State *L, int meshtbl)
+{
+	check_vector(L, meshtbl, "normals", 1, 0, 0.1, 0);
+	check_vector(L, meshtbl, "normals", 2, 0, 0.2, 0);
+	check_vector(L, meshtbl, "normals", 3, 0, 0.4, 0);
+	check_vector(L, meshtbl, "normals", 4, 0, 1.0, 0);
+}
+
+
+void create_tangents(struct aiMesh *mesh)
+{
+	/* these tangents are not normalized -- see note in create_normals */
+	mesh->mTangents[0] = (struct aiVector3D) { 0.1, 0, 0 };
+	mesh->mTangents[1] = (struct aiVector3D) { 0.2, 0, 0 };
+	mesh->mTangents[2] = (struct aiVector3D) { 0.4, 0, 0 };
+	mesh->mTangents[3] = (struct aiVector3D) { 1.0, 0, 0 };
+
+	mesh->mBitangents[0] = (struct aiVector3D) { 0, 0, 0.1 };
+	mesh->mBitangents[1] = (struct aiVector3D) { 0, 0, 0.2 };
+	mesh->mBitangents[2] = (struct aiVector3D) { 0, 0, 0.4 };
+	mesh->mBitangents[3] = (struct aiVector3D) { 0, 0, 1.0 };
+}
+
+
+void test_tangents(lua_State *L, int meshtbl)
+{
+	check_vector(L, meshtbl, "tangents", 1, 0.1, 0, 0);
+	check_vector(L, meshtbl, "tangents", 2, 0.2, 0, 0);
+	check_vector(L, meshtbl, "tangents", 3, 0.4, 0, 0);
+	check_vector(L, meshtbl, "tangents", 4, 1.0, 0, 0);
+
+	check_vector(L, meshtbl, "bitangents", 1, 0, 0, 0.1);
+	check_vector(L, meshtbl, "bitangents", 2, 0, 0, 0.2);
+	check_vector(L, meshtbl, "bitangents", 3, 0, 0, 0.4);
+	check_vector(L, meshtbl, "bitangents", 4, 0, 0, 1.0);
+}
+
+
+void create_uvs(struct aiMesh *mesh)
+{
+	mesh->mNumUVComponents[0] = 2;
+	mesh->mTextureCoords[0][0] = (struct aiVector3D) { 0, 0, 0 };
+	mesh->mTextureCoords[0][1] = (struct aiVector3D) { 0, 1, 0 };
+	mesh->mTextureCoords[0][2] = (struct aiVector3D) { 1, 0, 0 };
+	mesh->mTextureCoords[0][3] = (struct aiVector3D) { 1, 1, 0 };
+
+	mesh->mNumUVComponents[1] = 1;
+	mesh->mTextureCoords[1][0] = (struct aiVector3D) { 0.0, 0, 0 };
+	mesh->mTextureCoords[1][1] = (struct aiVector3D) { 0.2, 0, 0 };
+	mesh->mTextureCoords[1][2] = (struct aiVector3D) { 0.4, 0, 0 };
+	mesh->mTextureCoords[1][3] = (struct aiVector3D) { 0.8, 0, 0 };
+
+	for (int i=2; i<AI_MAX_NUMBER_OF_TEXTURECOORDS; i++)
+		mesh->mTextureCoords[i] = NULL;
+}
+
+
+static int check_uv(lua_State *L, int meshtbl, int channel, int index, 
+                        float x, float y, float z)
+{
+	lua_getfield(L, meshtbl, "uvs");
+	lily_assert(lua_type(L, -1) == LUA_TTABLE, "field 'uvs' is not a table!");
+	lua_rawgeti(L, -1, channel);
+	lily_assert(lua_type(L, -1) == LUA_TTABLE, "uvs[%d] is not a table!", channel);
+	lua_rawgeti(L, -1, index);
+	lily_assert(lua_type(L, -1) == LUA_TTABLE, "uvs[%d][%d] is not a table!", channel, index);
+
+	lua_getfield(L, -1, "x");
+	lily_assert(lua_type(L, -1) == LUA_TNUMBER, "uvs[%d][%d].x is not a number!", channel, index);
+	float vx = lua_tonumber(L, -1);
+	lua_pop(L, 1);
+
+	lua_getfield(L, -1, "y");
+	lily_assert(lua_type(L, -1) == LUA_TNUMBER, "uvs[%d][%d].y is not a number!", channel, index);
+	float vy = lua_tonumber(L, -1);
+	lua_pop(L, 1);
+
+	lua_getfield(L, -1, "z");
+	lily_assert(lua_type(L, -1) == LUA_TNUMBER, "uvs[%d][%d].z is not a number!", channel, index);
+	float vz = lua_tonumber(L, -1);
+	lua_pop(L, 1);
+
+	lua_pop(L, 3);
+	lily_assert(
+		(fabs(vx - x) < 0.1) &&
+		(fabs(vy - y) < 0.1) &&
+		(fabs(vz - z) < 0.1),
+		"uvs[%d][%d] is [%f, %f, %f], but expected [%f, %f, %f]!",
+		channel, index,
+		vx, vy, vz,
+		x, y, z
+	);
+}
+
+
+void test_uvs(lua_State *L, int meshtbl)
+{
+	lua_getfield(L, meshtbl, "numUvComponents");
+	lily_assert(lua_type(L, -1) == LUA_TTABLE, "field 'numUvComponents' is not a table!");
+	lua_rawgeti(L, -1, 1);
+	lily_assert_int_equal(lua_tointeger(L, -1), 2);
+	lua_pop(L, 1);
+	lua_rawgeti(L, -1, 2);
+	lily_assert_int_equal(lua_tointeger(L, -1), 1);
+	lua_pop(L, 1);
+
+	check_uv(L, meshtbl, 1, 1, 0, 0, 0);
+	check_uv(L, meshtbl, 1, 2, 0, 1, 0);
+	check_uv(L, meshtbl, 1, 3, 1, 0, 0);
+	check_uv(L, meshtbl, 1, 4, 1, 1, 0);
+
+	check_uv(L, meshtbl, 2, 1, 0.0, 0, 0);
+	check_uv(L, meshtbl, 2, 2, 0.2, 0, 0);
+	check_uv(L, meshtbl, 2, 3, 0.4, 0, 0);
+	check_uv(L, meshtbl, 2, 4, 0.8, 0, 0);
+
+	lua_getfield(L, meshtbl, "uvs");
+	int uvtbl = lua_gettop(L);
+	for (int i=2; i<AI_MAX_NUMBER_OF_TEXTURECOORDS; i++) {
+		lua_rawgeti(L, uvtbl, i+1);
+		lily_assert(lua_type(L, -1) == LUA_TNIL, "uv channel %d is non-nil!", i+1);
+		lua_pop(L, 1);
+	}
+	lua_pop(L, 1);
+}
+
+void test_nil(lua_State *L, int meshtbl, const char *field)
+{
+	lua_getfield(L, meshtbl, field);
+	lily_assert(lua_type(L, -1) == LUA_TNIL, "field '%s' is not nil!");
+	lua_pop(L, 1);
+}
+
+
+/* --===== end mesh tests =====-- */
diff --git a/src/import/import_node.test.c b/src/import/import_node.test.c
new file mode 100644
index 0000000..4d5c9ef
--- /dev/null
+++ b/src/import/import_node.test.c
@@ -0,0 +1,116 @@
+#include <assimp/scene.h>
+#include <lua.h>
+#include <lauxlib.h>
+#include <honeysuckle.h>
+#include "test/lily-test.h"
+#include "import.test.h"
+
+
+#include "import.c"
+
+
+#define MESH_COUNT 13
+void test_push_node()
+{
+	lua_State *L = luaL_newstate();
+
+	int meshes[MESH_COUNT];
+	for (int i=0; i<MESH_COUNT; i++)
+		meshes[i] = i;
+	
+	/* first layer node */
+	struct aiNode root;
+	root.mParent = NULL;
+	root.mMeshes = meshes;
+	root.mNumMeshes = 3;
+
+	/* second layer nodes */
+	struct aiNode nodeA, nodeB;
+	struct aiNode *root_children[] = { &nodeA, &nodeB };
+	root.mChildren = root_children;
+	root.mNumChildren = 2;
+
+	nodeA.mMeshes = meshes + 3;
+	nodeA.mNumMeshes = 2;
+	nodeA.mChildren = NULL;
+	
+	nodeB.mMeshes = meshes + 5;
+	nodeB.mNumMeshes = 2;
+	nodeB.mChildren = NULL;
+
+	/* push */
+	int top = lua_gettop(L);
+	push_node(L, &root);
+
+	/* check */
+	lily_assert_int_equal(top+1, lua_gettop(L));
+	lily_assert_int_equal(lua_type(L, -1), LUA_TTABLE);
+
+	int nodetbl = lua_gettop(L);
+
+	/* check meshes */
+	lua_getfield(L, nodetbl, "meshes");
+	lily_assert_int_equal(lua_type(L, -1), LUA_TTABLE);
+
+	lua_rawgeti(L, -1, 1);
+	lily_assert_int_equal(lua_type(L, -1), LUA_TNUMBER);
+	lily_assert_int_equal(lua_tointeger(L, -1), 1);
+	lua_pop(L, 1);
+
+	lua_rawgeti(L, -1, 2);
+	lily_assert_int_equal(lua_type(L, -1), LUA_TNUMBER);
+	lily_assert_int_equal(lua_tointeger(L, -1), 2);
+	lua_pop(L, 1);
+
+	lua_rawgeti(L, -1, 3);
+	lily_assert_int_equal(lua_type(L, -1), LUA_TNUMBER);
+	lily_assert_int_equal(lua_tointeger(L, -1), 3);
+	lua_pop(L, 1);
+
+	/* check children */
+	lua_getfield(L, nodetbl, "children");
+	int childrentbl = lua_gettop(L);
+	lily_assert_int_equal(lua_type(L, -1), LUA_TTABLE);
+
+	lua_rawgeti(L, childrentbl, 1);
+	lily_assert_int_equal(lua_type(L, -1), LUA_TTABLE);
+	int atbl = lua_gettop(L);
+	lua_getfield(L, atbl, "meshes");
+	lily_assert_int_equal(lua_type(L, -1), LUA_TTABLE);
+
+	lua_rawgeti(L, -1, 1);
+	lily_assert_int_equal(lua_type(L, -1), LUA_TNUMBER);
+	lily_assert_int_equal(lua_tointeger(L, -1), 4);
+	lua_pop(L, 1);
+
+	lua_rawgeti(L, -1, 2);
+	lily_assert_int_equal(lua_type(L, -1), LUA_TNUMBER);
+	lily_assert_int_equal(lua_tointeger(L, -1), 5);
+	lua_pop(L, 2);
+
+	lua_getfield(L, atbl, "children");
+	lily_assert_int_equal(lua_type(L, -1), LUA_TNIL);
+	lua_pop(L, 2);
+
+	lua_rawgeti(L, childrentbl, 2);
+	lily_assert_int_equal(lua_type(L, -1), LUA_TTABLE);
+	int btbl = lua_gettop(L);
+	lua_getfield(L, btbl, "meshes");
+	lily_assert_int_equal(lua_type(L, -1), LUA_TTABLE);
+
+	lua_rawgeti(L, -1, 1);
+	lily_assert_int_equal(lua_type(L, -1), LUA_TNUMBER);
+	lily_assert_int_equal(lua_tointeger(L, -1), 6);
+	lua_pop(L, 1);
+
+	lua_rawgeti(L, -1, 2);
+	lily_assert_int_equal(lua_type(L, -1), LUA_TNUMBER);
+	lily_assert_int_equal(lua_tointeger(L, -1), 7);
+	lua_pop(L, 2);
+
+	lua_getfield(L, btbl, "children");
+	lily_assert_int_equal(lua_type(L, -1), LUA_TNIL);
+	lua_pop(L, 2);
+
+	lua_close(L);
+}