New Material Object Representation

include/bu/avs.h

@@ -222,6 +222,13 @@ BU_EXPORT extern void bu_avs_merge(struct bu_attribute_value_set *dest,
 BU_EXPORT extern const char *bu_avs_get(const struct bu_attribute_value_set *avp,
 					const char *attribute);
 
+/**
+ * gets all attributes in an attribute set in "name = value" form,
+ * using the provided title.
+ */
+BU_EXPORT extern const char *bu_avs_get_all(const struct bu_attribute_value_set *avp,
+				   const char *title);
+
 /**
  * Remove all occurrences of an attribute from the provided attribute
  * set.

include/bu/magic.h

@@ -168,6 +168,7 @@ __BEGIN_DECLS
 #define RT_AP_MAGIC			0x4170706c /**< Appl */
 #define RT_COMB_MAGIC			0x436f6d49 /**< ComI */
 #define RT_CONSTRAINT_MAGIC		0x7063696d /**< pcim */
+#define RT_MATERIAL_MAGIC		0x54414d55 /**< TAMU */
 #define RT_CTS_MAGIC			0x98989123 /**< ???\# */
 #define RT_DB_TRAVERSE_MAGIC		0x64627472 /**< dbtr */
 #define RT_DBTS_MAGIC			0x64627473 /**< dbts */

include/rt/db5.h

@@ -173,6 +173,7 @@ struct db5_ondisk_header {
 #define DB5_MINORTYPE_BRLCAD_HRT		43
 #define DB5_MINORTYPE_BRLCAD_DATUM		44
 #define DB5_MINORTYPE_BRLCAD_SCRIPT     45
+#define DB5_MINORTYPE_BRLCAD_MATERIAL   46
 
 /* Uniform-array binary */
 #define DB5_MINORTYPE_BINU_WID_MASK		0x30

include/rt/defines.h

@@ -109,7 +109,7 @@
  * NOTE: must update the non-geometric object id's below the
  * ADD_BELOW_HERE marker
  */
-#define ID_MAX_SOLID    46      /**< @brief Maximum defined ID_xxx for solids */
+#define ID_MAX_SOLID    47      /**< @brief Maximum defined ID_xxx for solids */
 
 /*
  * Non-geometric objects
@@ -119,6 +119,7 @@
 #define ID_BINUNIF      33      /**< @brief Uniform-array binary */
 #define ID_UNUSED2      34      /**< @brief UNUSED (placeholder) */
 #define ID_CONSTRAINT   39      /**< @brief Constraint object */
+#define ID_MATERIAL     46      /**< @brief Material object */
 
 /* - ADD_BELOW_HERE - */
 /* superellipsoid should be 31, but is not v5 compatible */
@@ -132,7 +133,7 @@
 #define ID_HRT          43      /**< @brief Heart */
 #define ID_DATUM        44      /**< @brief Datum references */
 #define ID_SCRIPT       45      /**< @brief Script */
-#define ID_MAXIMUM      46      /**< @brief Maximum defined ID_xxx value */
+#define ID_MAXIMUM      47      /**< @brief Maximum defined ID_xxx value */
 
 /**
  * DEPRECATED: external applications should use other LIBRT API to

include/rt/nongeom.h

@@ -134,6 +134,23 @@ struct rt_constraint_internal {
 #define RT_CHECK_CONSTRAINT(_p) BU_CKMAG(_p, RT_CONSTRAINT_MAGIC, "rt_constraint_internal")
 #define RT_CK_CONSTRAINT(_p) RT_CHECK_CONSTRAINT(_p)
 
+/**
+ * In-memory format for database "material" record
+ */
+struct rt_material_internal {
+	uint32_t magic;
+	struct bu_vls name;
+	struct bu_vls parent;
+	struct bu_vls source;
+
+	struct bu_attribute_value_set physicalProperties;
+	struct bu_attribute_value_set mechanicalProperties;
+	struct bu_attribute_value_set opticalProperties;
+	struct bu_attribute_value_set thermalProperties;
+};
+
+#define RT_CHECK_MATERIAL(_p) BU_CKMAG(_p, RT_MATERIAL_MAGIC, "rt_material_internal")
+#define RT_CK_MATERIAL(_p) RT_CHECK_MATERIAL(_p)
 
 __END_DECLS
 

include/wdb.h

@@ -347,6 +347,17 @@ WDB_EXPORT extern int mk_ars(struct rt_wdb *fp, const char *name, size_t ncurves
 WDB_EXPORT extern int mk_constraint(struct rt_wdb *wdbp, const char *name, const char *expr);
 
 
+WDB_EXPORT extern int mk_material(struct rt_wdb *wdbp,
+                                    const char *db_name,
+                                    const char *name,
+                                    const char *parent,
+                                    const char *source,
+                                    struct bu_attribute_value_set *physicalProperties,
+                                    struct bu_attribute_value_set *mechanicalProperties,
+                                    struct bu_attribute_value_set *opticalProperties,
+                                    struct bu_attribute_value_set *thermalProperties);
+
+
 /* FIXME: are the variable-sized types actually necessary?  should be
  * able to rely on stdint types.  the file+nonfile duplication seems
  * silly too.

src/libbu/avs.c

@@ -198,6 +198,37 @@ bu_avs_get(const struct bu_attribute_value_set *avsp, const char *name)
     return NULL;
 }
 
+const char *
+bu_avs_get_all(const struct bu_attribute_value_set *avsp, const char *title) {
+    BU_CK_AVS(avsp);
+
+    struct bu_attribute_value_pair *avpp;
+    size_t i;
+    struct bu_vls str = BU_VLS_INIT_ZERO;
+
+    if (title) {
+        bu_vls_strcat(&str, title);
+        bu_vls_strcat(&str, "=\"");
+    }
+
+    avpp = avsp->avp;
+    for (i = 0; i < avsp->count; i++, avpp++) {
+        bu_vls_strcat(&str, "\t\t(");
+        bu_vls_strcat(&str, avpp->name ? avpp->name : "NULL");
+        bu_vls_strcat(&str, " : ");
+        bu_vls_strcat(&str, avpp->value ? avpp->value : "NULL");
+        bu_vls_strcat(&str, ")\n");
+    }
+
+    if (title) {
+        bu_vls_strcat(&str, "\"");
+    }
+
+    const char * attributes = bu_vls_strgrab(&str);
+
+    return attributes;
+}
+
 
 int
 bu_avs_remove(struct bu_attribute_value_set *avsp, const char *name)

src/libbu/magic.c

@@ -236,6 +236,8 @@ bu_identify_magic(register uint32_t magic)
 	    return "librt rt_comb_internal";
 	case RT_CONSTRAINT_MAGIC:
 	    return "librt rt_constraint_internal";
+	case RT_MATERIAL_MAGIC:
+	    return "librt rt_material_internal";
 	case RT_CTS_MAGIC:
 	    return "librt combined_tree_state";
 	case RT_DB_TRAVERSE_MAGIC: