From ca9330b412da1e6d84ff0ae9d017206e89e1c237 Mon Sep 17 00:00:00 2001
From: Irastris <irastris15@gmail.com>
Date: Sat, 25 Apr 2026 20:40:29 -0400
Subject: [PATCH] Register interp callback for d_a_obj_lv8OptiLift Fixes
 disappearing platforms

---
 src/d/actor/d_a_obj_lv8OptiLift.cpp | 41 +++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/src/d/actor/d_a_obj_lv8OptiLift.cpp b/src/d/actor/d_a_obj_lv8OptiLift.cpp
index a8610989a7..6b6c806d64 100644
--- a/src/d/actor/d_a_obj_lv8OptiLift.cpp
+++ b/src/d/actor/d_a_obj_lv8OptiLift.cpp
@@ -11,6 +11,10 @@
 #include "d/d_com_inf_game.h"
 #include "d/d_path.h"
 
+#if TARGET_PC
+#include "dusk/frame_interpolation.h"
+#endif
+
 daOptiLift_HIO_c::daOptiLift_HIO_c() {
     mStopDisappearTime = 30;
     mStartMoveTime = 30;
@@ -412,7 +416,44 @@ void daOptiLift_c::setNextPoint() {
     mCurrentPoint = next_point;
 }
 
+#if TARGET_PC
+static void daOptiLift_interp_callback(bool isSimFrame, void* pUserWork) {
+    daOptiLift_c* lift = static_cast<daOptiLift_c*>(pUserWork);
+    if (lift == NULL || lift->mpModel == NULL) {
+        return;
+    }
+
+    g_env_light.settingTevStruct(0x10, &lift->current.pos, &lift->tevStr);
+    g_env_light.setLightTevColorType_MAJI(lift->mpModel, &lift->tevStr);
+
+    J3DModelData* modelData = lift->mpModel->getModelData();
+    J3DMaterial* materialp = modelData->getMaterialNodePointer(0);
+
+    if (materialp->getTexGenBlock()->getTexMtx(1) != NULL) {
+        J3DTexMtxInfo* mtx_info = &materialp->getTexGenBlock()->getTexMtx(1)->getTexMtxInfo();
+        if (mtx_info != NULL) {
+            Mtx m;
+            C_MTXLightOrtho(m, 100.0f, -100.0f, -100.0f, 100.0f, 1.0f, 1.0f, 0.0f, 0.0f);
+            mDoMtx_stack_c::XrotS(0x4000);
+            mDoMtx_stack_c::transM(-lift->current.pos.x, -lift->current.pos.y, -lift->current.pos.z);
+            cMtx_concat(m, mDoMtx_stack_c::get(), mtx_info->mEffectMtx);
+        }
+    }
+
+    lift->mBtk.entry(modelData);
+
+    J3DGXColor* color = materialp->getTevKColor(1);
+    color->r = l_HIO.mColorR;
+    color->g = l_HIO.mColorG;
+    color->b = l_HIO.mColorB;
+}
+#endif
+
 int daOptiLift_c::Draw() {
+#if TARGET_PC
+    dusk::frame_interp::add_interpolation_callback(&daOptiLift_interp_callback, this);
+#endif
+
     g_env_light.settingTevStruct(0x10, &current.pos, &tevStr);
     g_env_light.setLightTevColorType_MAJI(mpModel, &tevStr);