add modeltree:get_matrix, :set_matrix

src/logic/scripting/lua/libentity.cpp

@@ -111,16 +111,43 @@ static int l_get_size(lua::State* L) {
     return 0;
 }
 
+static int index_range_check(const rigging::Rig& rig, lua::Integer index) {
+    if (static_cast<size_t>(index) >= rig.pose.matrices.size()) {
+        throw std::runtime_error("index out of range [0, " +
+                                 std::to_string(rig.pose.matrices.size()) +
+                                 "]");
+    }
+    return static_cast<int>(index);
+}
+
 static int l_modeltree_get_model(lua::State* L) {
     if (auto entity = get_entity(L, 1)) {
         auto& rig = entity->getModeltree();
         auto* rigConfig = rig.config;
-        auto index = lua::tointeger(L, 2);
+        auto index = index_range_check(rig, lua::tointeger(L, 2));
         return lua::pushstring(L, rigConfig->getNodes()[index]->getModelName());
     }
     return 0;
 }
 
+static int l_modeltree_get_matrix(lua::State* L) {
+    if (auto entity = get_entity(L, 1)) {
+        auto& rig = entity->getModeltree();
+        auto index = index_range_check(rig, lua::tointeger(L, 2));
+        return lua::pushmat4(L, rig.pose.matrices[index]);
+    }
+    return 0;
+}
+
+static int l_modeltree_set_matrix(lua::State* L) {
+    if (auto entity = get_entity(L, 1)) {
+        auto& rig = entity->getModeltree();
+        auto index = index_range_check(rig, lua::tointeger(L, 2));
+        rig.pose.matrices[index] = lua::tomat4(L, 3);
+    }
+    return 0;
+}
+
 const luaL_Reg entitylib [] = {
     {"exists", lua::wrap<l_exists>},
     {"spawn", lua::wrap<l_spawn>},
@@ -130,6 +157,8 @@ const luaL_Reg entitylib [] = {
 
 const luaL_Reg modeltreelib [] = {
     {"get_model", lua::wrap<l_modeltree_get_model>},
+    {"get_matrix", lua::wrap<l_modeltree_get_matrix>},
+    {"set_matrix", lua::wrap<l_modeltree_set_matrix>},
     {NULL, NULL}
 };
 

src/objects/Entities.cpp

@@ -78,9 +78,9 @@ entityid_t Entities::spawn(
     auto& scripting = registry.emplace<Scripting>(
         entity, entity_funcs_set {}, nullptr);
     entities[id] = entity;
+    registry.emplace<rigging::Rig>(entity, rig->instance());
     scripting.env = scripting::on_entity_spawn(
         def, id, scripting.funcsset, std::move(args));
-    registry.emplace<rigging::Rig>(entity, rig->instance());
     return id;
 }
 

src/objects/rigging.cpp

@@ -42,10 +42,11 @@ size_t RigConfig::update(
     glm::mat4 matrix) const
 {
     rig.calculated.matrices[index] = matrix * rig.pose.matrices[index];
+    size_t count = 1;
     for (auto& subnode : node->getSubnodes()) {
-        index = update(index+1, rig, subnode.get(), rig.calculated.matrices[index]);
+        count += update(index+count, rig, subnode.get(), rig.calculated.matrices[index]);
     }
-    return index;
+    return count;
 }
 
 void RigConfig::update(Rig& rig, glm::mat4 matrix) const {

src/objects/rigging.hpp

@@ -1,5 +1,5 @@
-#ifndef OBJECTS_SKELETON_HPP_
-#define OBJECTS_SKELETON_HPP_
+#ifndef OBJECTS_RIGGING_HPP_
+#define OBJECTS_RIGGING_HPP_
 
 #include "../typedefs.hpp"
 
@@ -23,11 +23,8 @@ namespace rigging {
     struct Pose {
         std::vector<glm::mat4> matrices;
 
-        Pose(size_t size) : matrices(size) {
-            matrices.resize(size);
-            for (size_t i = 0; i < size; i++) {
-                matrices[i] = glm::mat4(1.0f);
-            }
+        Pose(size_t size) {
+            matrices.resize(size, glm::mat4(1.0f));
         }
     };
 
@@ -115,4 +112,4 @@ namespace rigging {
     };
 };
 
-#endif // OBJECTS_SKELETON_HPP_
+#endif // OBJECTS_RIGGING_HPP_