threedim: adapt ModelDisplay to Pass::p.pipeline engine API

The engine rework moved the pipeline pointer to Pass::p.pipeline; ModelDisplayNode still used the old Pass::pipeline (6 sites) and failed to compile against the reworked engine. This is the engine-API blast radius and must ride with gfx-scene so score_plugin_threedim builds (and so gfx-scene can merge without breaking master's threedim plugin). The fuller ModelDisplay refresh remains on split/threedim. PR #2050.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: jcelerier

src/plugins/score-plugin-threedim/Threedim/ModelDisplay/ModelDisplayNode.cpp

@@ -908,24 +908,24 @@ class ModelDisplayNode::Renderer : public GenericNodeRenderer
 
     for(auto& [e, pass] : this->m_p)
     {
-      pass.pipeline->destroy();
+      pass.p.pipeline->destroy();
 
-      pass.pipeline->setTargetBlends({blend});
+      pass.p.pipeline->setTargetBlends({blend});
 
       switch(m_draw_mode)
       {
         case 0:
-          pass.pipeline->setTopology(QRhiGraphicsPipeline::Triangles);
+          pass.p.pipeline->setTopology(QRhiGraphicsPipeline::Triangles);
           break;
         case 1:
-          pass.pipeline->setTopology(QRhiGraphicsPipeline::Points);
+          pass.p.pipeline->setTopology(QRhiGraphicsPipeline::Points);
           break;
         case 2:
-          pass.pipeline->setTopology(QRhiGraphicsPipeline::Lines);
+          pass.p.pipeline->setTopology(QRhiGraphicsPipeline::Lines);
           break;
       }
 
-      pass.pipeline->create();
+      pass.p.pipeline->create();
     }
   }