static int create_translate_node(lua_State *L) {
maybe_insert_default_mv(L);
int nargs = am_check_nargs(L, 2);
am_translate_node *node = am_new_userdata(L, am_translate_node);
node->tags.push_back(L, AM_TAG_TRANSLATE);
node->name = am_lookup_param_name(L, 1);
switch (am_get_type(L, 2)) {
case MT_am_vec2: {
glm::vec2 v2 = am_get_userdata(L, am_vec2, 2)->v;
node->v = glm::vec3(v2.x, v2.y, 0.0f);
break;
}
case MT_am_vec3: {
node->v = am_get_userdata(L, am_vec3, 2)->v;
break;
}
case LUA_TNUMBER: {
if (nargs < 3) {
return luaL_error(L, "too few arguments");
} else if (nargs == 3) {
node->v = glm::vec3((float)luaL_checknumber(L, 2), (float)luaL_checknumber(L, 3), 0.0f);
} else if (nargs == 4) {
node->v = glm::vec3((float)luaL_checknumber(L, 2), (float)luaL_checknumber(L, 3), (float)luaL_checknumber(L, 4));
} else {
return luaL_error(L, "too many arguments");
}
break;
}
default:
return luaL_error(L, "expecting a vec2 or vec3 argument");
}
return 1;
}
static int create_scale_node(lua_State *L) {
maybe_insert_default_mv(L);
int nargs = am_check_nargs(L, 2);
am_scale_node *node = am_new_userdata(L, am_scale_node);
node->tags.push_back(L, AM_TAG_SCALE);
node->name = am_lookup_param_name(L, 1);
switch (am_get_type(L, 2)) {
case MT_am_vec2: {
glm::dvec2 v2 = am_get_userdata(L, am_vec2, 2)->v;
node->v = glm::dvec3(v2.x, v2.y, 1.0);
break;
}
case MT_am_vec3: {
node->v = am_get_userdata(L, am_vec3, 2)->v;
break;
}
case LUA_TNUMBER: {
if (nargs == 2) {
double s = (double)luaL_checknumber(L, 2);
node->v = glm::dvec3(s, s, 1.0);
} else if (nargs == 3) {
node->v = glm::dvec3((double)luaL_checknumber(L, 2), (double)luaL_checknumber(L, 3), 1.0);
} else if (nargs == 4) {
node->v = glm::dvec3((double)luaL_checknumber(L, 2), (double)luaL_checknumber(L, 3), (double)luaL_checknumber(L, 4));
} else {
return luaL_error(L, "too many arguments");
}
break;
}
default:
return luaL_error(L, "expecting a vec2 or vec3 argument");
}
return 1;
}
static int create_lookat_node(lua_State *L) {
maybe_insert_default_mv(L);
am_check_nargs(L, 4);
am_lookat_node *node = am_new_userdata(L, am_lookat_node);
node->tags.push_back(L, AM_TAG_LOOKAT);
node->name = am_lookup_param_name(L, 1);
node->eye = am_get_userdata(L, am_vec3, 2)->v;
node->center = am_get_userdata(L, am_vec3, 3)->v;
node->up = am_get_userdata(L, am_vec3, 4)->v;
return 1;
}
static int create_billboard_node(lua_State *L) {
maybe_insert_default_mv(L);
int nargs = am_check_nargs(L, 1);
am_billboard_node *node = am_new_userdata(L, am_billboard_node);
node->tags.push_back(L, AM_TAG_BILLBOARD);
node->name = am_lookup_param_name(L, 1);
node->preserve_uniform_scaling = false;
if (nargs > 1) {
node->preserve_uniform_scaling = lua_toboolean(L, 2);
}
return 1;
}
static int create_rotate_node(lua_State *L) {
maybe_insert_default_mv(L);
int nargs = am_check_nargs(L, 2);
am_rotate_node *node = am_new_userdata(L, am_rotate_node);
node->tags.push_back(L, AM_TAG_ROTATE);
node->name = am_lookup_param_name(L, 1);
switch (am_get_type(L, 2)) {
case MT_am_quat:
node->rotation = am_get_userdata(L, am_quat, 2)->q;
node->angle = glm::angle(node->rotation);
node->axis = glm::axis(node->rotation);
break;
default:
node->angle = luaL_checknumber(L, 2);
if (nargs > 2) {
node->axis = am_get_userdata(L, am_vec3, 3)->v;
} else {
node->axis = glm::vec3(0.0f, 0.0f, 1.0f);
}
node->rotation = glm::angleAxis(node->angle, node->axis);
break;
}
return 1;
}
