Initial gamelib integration AAS2 with some animation and physics and another integration pass on idLib.

source/engine/gamelib/animstack/animator_proxy.cpp

@@ -0,0 +1,39 @@
+#include "gamelib/animstack/animator_proxy.h"
+
+// These allocator calls are owned by the idAnimStack/md6Allocator recovery.
+// Keeping the boundary explicit allows the complete Proxy TU to compile now
+// without inventing an allocator layout or a temporary allocation policy.
+idMD6Branch* GameLib_AllocMD6Branch(idAnimStack* stack);
+void GameLib_FreeMD6Branch(idAnimStack* stack, idMD6Branch* branch);
+
+idAnimator_Proxy::idAnimator_Proxy()
+    : idAnimator_Base()
+    , mergeBranch(nullptr) {
+}
+
+idAnimator_Proxy::~idAnimator_Proxy() {
+    mergeBranch = nullptr;
+}
+
+void idAnimator_Proxy::SetTree(idMD6Node* const tree) {
+    if (mergeBranch != nullptr) {
+        mergeBranch->right = tree;
+    }
+}
+
+bool idAnimator_Proxy::InternalInit(
+    const idAnimatorParms_Base& parameters) {
+    mergeBranch = GameLib_AllocMD6Branch(parameters.animStack);
+    return true;
+}
+
+void idAnimator_Proxy::InternalShutdown(idAnimStack* const stack) {
+    if (stack != nullptr && mergeBranch != nullptr) {
+        GameLib_FreeMD6Branch(stack, mergeBranch);
+        mergeBranch = nullptr;
+    }
+}
+
+bool idAnimator_Proxy::InternalIsContributing() const {
+    return mergeBranch != nullptr && mergeBranch->right != nullptr;
+}