Use a model instance to prevent rendering destroyed subobjects

Author: MjnMixael

code/scripting/api/objs/shipclass.cpp

@@ -1227,6 +1227,11 @@ ADE_FUNC(renderTechModel,
 
 	//Draw the ship!!
 	model_clear_instance(sip->model_num);
+
+	//Create an instance that can be used to clear out destroyed subobjects from rendering
+	int model_instance = model_create_instance(-1, sip->model_num);
+	model_set_up_techroom_instance(sip, model_instance);
+
 	render_info.set_detail_level_lock(0);
 
 	uint render_flags = MR_AUTOCENTER | MR_NO_FOGGING;
@@ -1236,7 +1241,7 @@ ADE_FUNC(renderTechModel,
 
 	render_info.set_flags(render_flags);
 
-	model_render_immediate(&render_info, sip->model_num, &orient, &vmd_zero_vector);
+	model_render_immediate(&render_info, sip->model_num, model_instance, &orient, &vmd_zero_vector);
 
 	//OK we're done
 	gr_end_view_matrix();
@@ -1296,6 +1301,11 @@ ADE_FUNC(renderTechModel2, l_Shipclass, "number X1, number Y1, number X2, number
 
 	//Draw the ship!!
 	model_clear_instance(sip->model_num);
+
+	// Create an instance that can be used to clear out destroyed subobjects from rendering
+	int model_instance = model_create_instance(-1, sip->model_num);
+	model_set_up_techroom_instance(sip, model_instance);
+
 	render_info.set_detail_level_lock(0);
 
 	uint render_flags = MR_AUTOCENTER | MR_NO_FOGGING;
@@ -1305,7 +1315,7 @@ ADE_FUNC(renderTechModel2, l_Shipclass, "number X1, number Y1, number X2, number
 
 	render_info.set_flags(render_flags);
 
-	model_render_immediate(&render_info, sip->model_num, orient, &vmd_zero_vector);
+	model_render_immediate(&render_info, sip->model_num, model_instance, orient, &vmd_zero_vector);
 
 	//OK we're done
 	gr_end_view_matrix();