Index: trunk/src_plugins/io_altium/delay_postproc.c
===================================================================
--- trunk/src_plugins/io_altium/delay_postproc.c	(nonexistent)
+++ trunk/src_plugins/io_altium/delay_postproc.c	(revision 35649)
@@ -0,0 +1,99 @@
+/*
+ *                            COPYRIGHT
+ *
+ *  pcb-rnd, interactive printed circuit board design
+ *
+ *  delayed creation of objects
+ *  pcb-rnd Copyright (C) 2021 Tibor 'Igor2' Palinkas
+ *  (Supported by NLnet NGI0 PET Fund in 2021)
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ *  Contact:
+ *    Project page: http://repo.hu/projects/pcb-rnd
+ *    lead developer: http://repo.hu/projects/pcb-rnd/contact.html
+ *    mailing list: pcb-rnd (at) list.repo.hu (send "subscribe")
+ */
+
+/* Copied from io_pads (the way altium does it is very differnet) */
+
+#include "obj_pstk_inlines.h"
+#include "netlist.h"
+#include "thermal.h"
+#include "change.h"
+#include "find.h"
+
+#include "pcbdoc.h"
+
+typedef struct {
+	void *rctx;
+	pcb_board_t *pcb;
+	pcb_poly_t *poly;
+	long netid;
+	pcb_thermal_t t;
+	void *uctx;
+} ppr_t;
+
+static void altium_post_poly_thermal_obj(pcb_board_t *pcb, pcb_poly_t *poly, pcb_any_obj_t *obj, pcb_thermal_t t)
+{
+	pcb_find_t fctx = {0};
+	rnd_bool isc;
+
+	/* deal with objects that intersect */
+	fctx.ignore_clearance = 1;
+
+	/* the polygon already has a clearance cutout for the object, compensate this
+	   with bloating up the search */
+	switch(obj->type) {
+		case PCB_OBJ_PSTK: fctx.bloat = ((pcb_pstk_t *)obj)->Clearance*2 + 2; break;
+		case PCB_OBJ_LINE: fctx.bloat = ((pcb_line_t *)obj)->Clearance + 2; break;
+		case PCB_OBJ_ARC:  fctx.bloat = ((pcb_arc_t *)obj)->Clearance + 2; break;
+		default: return;
+	}
+	isc = pcb_intersect_obj_obj(&fctx, (pcb_any_obj_t *)poly, obj);
+	pcb_find_free(&fctx);
+	if (!isc) return;
+
+	pcb_chg_obj_thermal(obj->type, obj, obj, obj, t, pcb_layer2id(pcb->Data, poly->parent.layer));
+}
+
+static rnd_r_dir_t altium_poly_therm(const rnd_box_t *b, void *cl)
+{
+	ppr_t *ppr = cl;
+	pcb_any_obj_t *o = (pcb_any_obj_t *)b;
+	long netid = io_altium_obj2netid(ppr->rctx, o);
+
+	if (netid == ppr->netid)
+		altium_post_poly_thermal_obj(ppr->pcb, ppr->poly, o, ppr->t);
+
+	return RND_R_DIR_FOUND_CONTINUE;
+}
+
+
+static void altium_post_poly_thermal_netname(void *rctx, pcb_board_t *pcb, pcb_poly_t *poly, long netid, pcb_thermal_t t, void *uctx)
+{
+	ppr_t ppr;
+
+	ppr.rctx = rctx;
+	ppr.pcb = pcb;
+	ppr.poly = poly;
+	ppr.netid = netid;
+	ppr.t = t;
+	ppr.uctx = uctx;
+
+	rnd_r_search(poly->parent.layer->line_tree, &poly->BoundingBox, NULL, altium_poly_therm, &ppr, NULL);
+	rnd_r_search(poly->parent.layer->arc_tree,  &poly->BoundingBox, NULL, altium_poly_therm, &ppr, NULL);
+	rnd_r_search(pcb->Data->padstack_tree,      &poly->BoundingBox, NULL, altium_poly_therm, &ppr, NULL);
+}
Index: trunk/src_plugins/io_altium/pcbdoc.c
===================================================================
--- trunk/src_plugins/io_altium/pcbdoc.c	(revision 35648)
+++ trunk/src_plugins/io_altium/pcbdoc.c	(revision 35649)
@@ -48,6 +48,8 @@
 #include "pcbdoc_bin.h"
 #include "htic.h"
 
+#include "delay_postproc.c"
+
 #define LY_CACHE_MAX 64
 
 typedef struct postpone_hole_s postpone_hole_t;