From b901b14d0e18afb59af78a40fe64de483ad94f8c Mon Sep 17 00:00:00 2001
From: Nicola Fontana <ntd@entidi.it>
Date: Fri, 9 Jan 2009 00:43:41 +0100
Subject: [PATCH] [AdgEntity] Implemented adg_entity_point_to_pair()

---
 adg/adg-entity.c | 33 +++++++++++++++++++++++++++++++++
 adg/adg-entity.h |  4 ++++
 2 files changed, 37 insertions(+)

diff --git a/adg/adg-entity.c b/adg/adg-entity.c
index a44a629d..28051f61 100644
--- a/adg/adg-entity.c
+++ b/adg/adg-entity.c
@@ -649,6 +649,39 @@ adg_entity_apply(AdgEntity *entity, AdgStyleSlot style_slot, cairo_t *cr)
 }
 
 /**
+ * adg_entity_point_to_pair:
+ * @entity: an #AdgEntity
+ * @point: the source #AdgPoint
+ * @pair: the destination #AdgPair
+ *
+ * Converts @point to @pair using the model and paper matrix of @entity.
+ **/
+void
+adg_entity_point_to_pair(AdgEntity *entity,
+                         const AdgPoint *point, AdgPair *pair)
+{
+    const AdgMatrix *model_matrix;
+    const AdgMatrix *paper_matrix;
+    AdgPair model_pair, paper_pair;
+
+    g_return_if_fail(ADG_IS_ENTITY(entity));
+    g_return_if_fail(point != NULL);
+    g_return_if_fail(pair != NULL);
+
+    model_matrix = ADG_ENTITY_GET_CLASS(entity)->get_model_matrix(entity);
+    paper_matrix = ADG_ENTITY_GET_CLASS(entity)->get_paper_matrix(entity);
+
+    adg_pair_copy(&model_pair, &point->model);
+    cpml_pair_transform(&model_pair, model_matrix);
+    
+    adg_pair_copy(&paper_pair, &point->paper);
+    cpml_pair_transform(&paper_pair, paper_matrix);
+
+    pair->x = model_pair.x + paper_pair.x;
+    pair->y = model_pair.y + paper_pair.y;
+}
+
+/**
  * adg_entity_model_matrix_applied:
  * @entity: an #AdgEntity
  *
diff --git a/adg/adg-entity.h b/adg/adg-entity.h
index 995537f8..c60b4871 100644
--- a/adg/adg-entity.h
+++ b/adg/adg-entity.h
@@ -23,6 +23,7 @@
 
 #include <adg/adg-context.h>
 #include <adg/adg-matrix.h>
+#include <adg/adg-point.h>
 #include <adg/adg-line-style.h>
 #include <adg/adg-font-style.h>
 #include <adg/adg-arrow-style.h>
@@ -116,6 +117,9 @@ AdgStyle *      adg_entity_get_style            (AdgEntity      *entity,
 void            adg_entity_apply                (AdgEntity      *entity,
                                                  AdgStyleSlot    style_slot,
                                                  cairo_t        *cr);
+void            adg_entity_point_to_pair        (AdgEntity      *entity,
+                                                 const AdgPoint *point,
+                                                 AdgPair        *pair);
 gboolean        adg_entity_model_matrix_applied (AdgEntity      *entity);
 gboolean        adg_entity_paper_matrix_applied (AdgEntity      *entity);
 gboolean        adg_entity_model_applied        (AdgEntity      *entity);
-- 
2.11.4.GIT