Parse interiors.

8 files changed, 73 insertions, 7 deletions

diff --git a/dimension/common.nonterminals b/dimension/common.nonterminals
index 7513f9c..c3b2b3f 100644
--- a/dimension/common.nonterminals
+++ b/dimension/common.nonterminals
@@ -59,6 +59,10 @@
 %type <astnode> REFLECTION
 %type <astnode> REFLECTION_ITEMS
 
+/* Interiors */
+%type <astnode> INTERIOR
+%type <astnode> INTERIOR_ITEMS
+
 /* Floats */
 %type <astnode> FLOAT
 %type <astnode> FLOAT_LITERAL
diff --git a/dimension/common.rules b/dimension/common.rules
index f0e8eae..7b4c609 100644
--- a/dimension/common.rules
+++ b/dimension/common.rules
@@ -153,6 +153,7 @@ OBJECT_MODIFIER: TRANSFORMATION
                | PIGMENT {
                  $$ = dmnsn_new_astnode1(DMNSN_AST_TEXTURE, @$, $1);
                }
+               | INTERIOR
 ;
 
 /* Textures */
@@ -259,6 +260,24 @@ REFLECTION_ITEMS: /* empty */ {
                 }
 ;
 
+/* Interiores */
+INTERIOR: "interior" "{"
+            INTERIOR_ITEMS
+          "}"
+        { $$ = $3; }
+;
+
+INTERIOR_ITEMS: /* empty */ {
+                $$ = dmnsn_new_astnode(DMNSN_AST_INTERIOR, @$);
+              }
+              | INTERIOR_ITEMS "ior" FLOAT {
+                dmnsn_astnode diffuse = dmnsn_new_astnode1(DMNSN_AST_IOR,
+                                                           @2, $3);
+                $$ = $1;
+                dmnsn_array_push($$.children, &diffuse);
+              }
+;
+
 /* Floats */
 
 FLOAT: ARITH_EXPR {
diff --git a/dimension/common.terminals b/dimension/common.terminals
index c50c7a9..fbe1eb2 100644
--- a/dimension/common.terminals
+++ b/dimension/common.terminals
@@ -233,14 +233,14 @@
 %token DMNSN_T_INSIDE
 %token DMNSN_T_INSIDE_VECTOR
 %token DMNSN_T_INT
-%token DMNSN_T_INTERIOR
+%token DMNSN_T_INTERIOR                 "interior"
 %token DMNSN_T_INTERIOR_TEXTURE
 %token DMNSN_T_INTERNAL
 %token DMNSN_T_INTERPOLATE
 %token DMNSN_T_INTERSECTION
 %token DMNSN_T_INTERVALS
 %token DMNSN_T_INVERSE
-%token DMNSN_T_IOR
+%token DMNSN_T_IOR                      "ior"
 %token DMNSN_T_IRID
 %token DMNSN_T_IRID_WAVELENGTH
 %token DMNSN_T_ISOSURFACE
diff --git a/dimension/directives.rules b/dimension/directives.rules
index 6f8a812..f3f3e7a 100644
--- a/dimension/directives.rules
+++ b/dimension/directives.rules
@@ -85,6 +85,7 @@ RVALUE: ARITH_EXPR ";" %dprec 2 {
       | TEXTURE
       | PIGMENT
       | FINISH
+      | INTERIOR
       | CAMERA
       | TRANSFORMATION
 
diff --git a/dimension/grammar.epilogue b/dimension/grammar.epilogue
index 6ea4e28..877b876 100644
--- a/dimension/grammar.epilogue
+++ b/dimension/grammar.epilogue
@@ -152,6 +152,9 @@ dmnsn_astnode_string(dmnsn_astnode_type astnode_type)
   dmnsn_astnode_map(DMNSN_AST_REFLECTION_ITEMS, "reflection-items");
   dmnsn_astnode_map(DMNSN_AST_FALLOFF, "falloff");
 
+  dmnsn_astnode_map(DMNSN_AST_INTERIOR, "interior");
+  dmnsn_astnode_map(DMNSN_AST_IOR, "ior");
+
   dmnsn_astnode_map(DMNSN_AST_FLOAT, "float");
   dmnsn_astnode_map(DMNSN_AST_INTEGER, "integer");
 
diff --git a/dimension/lexer.l b/dimension/lexer.l
index 77320c5..6531e0c 100644
--- a/dimension/lexer.l
+++ b/dimension/lexer.l
@@ -179,6 +179,8 @@ unsigned long wchar;
 "gray"          RETURN_TOKEN(DMNSN_T_GRAY);
 "grey"          RETURN_TOKEN(DMNSN_T_GRAY);
 "green"         RETURN_TOKEN(DMNSN_T_GREEN);
+"interior"      RETURN_TOKEN(DMNSN_T_INTERIOR);
+"ior"           RETURN_TOKEN(DMNSN_T_IOR);
 "location"      RETURN_TOKEN(DMNSN_T_LOCATION);
 "look_at"       RETURN_TOKEN(DMNSN_T_LOOK_AT);
 "light_source"  RETURN_TOKEN(DMNSN_T_LIGHT_SOURCE);
diff --git a/dimension/parse.h b/dimension/parse.h
index 9db4981..9511eab 100644
--- a/dimension/parse.h
+++ b/dimension/parse.h
@@ -66,6 +66,9 @@ typedef enum {
   DMNSN_AST_REFLECTION_ITEMS,
   DMNSN_AST_FALLOFF,
 
+  DMNSN_AST_INTERIOR,
+  DMNSN_AST_IOR,
+
   DMNSN_AST_FLOAT,
   DMNSN_AST_INTEGER,
 
diff --git a/dimension/realize.c b/dimension/realize.c
index 810d86e..b20ec9f 100644
--- a/dimension/realize.c
+++ b/dimension/realize.c
@@ -504,18 +504,18 @@ dmnsn_realize_texture(dmnsn_astnode astnode)
 
   unsigned int i;
   for (i = 0; i < dmnsn_array_size(astnode.children); ++i) {
-    dmnsn_astnode modifier;
-    dmnsn_array_get(astnode.children, i, &modifier);
+    dmnsn_astnode item;
+    dmnsn_array_get(astnode.children, i, &item);
 
-    switch (modifier.type) {
+    switch (item.type) {
     case DMNSN_AST_PIGMENT:
       dmnsn_delete_pigment(texture->pigment);
-      texture->pigment = dmnsn_realize_pigment(modifier);
+      texture->pigment = dmnsn_realize_pigment(item);
       break;
 
     case DMNSN_AST_FINISH:
       dmnsn_delete_finish(texture->finish);
-      texture->finish = dmnsn_realize_finish(modifier);
+      texture->finish = dmnsn_realize_finish(item);
       break;
 
     default:
@@ -526,6 +526,35 @@ dmnsn_realize_texture(dmnsn_astnode astnode)
   return texture;
 }
 
+static dmnsn_interior *
+dmnsn_realize_interior(dmnsn_astnode astnode)
+{
+  dmnsn_assert(astnode.type == DMNSN_AST_INTERIOR, "Expected a texture.");
+
+  dmnsn_interior *interior = dmnsn_new_interior();
+  if (!interior) {
+    dmnsn_error(DMNSN_SEVERITY_HIGH, "Couldn't allocate interior.");
+  }
+
+  unsigned int i;
+  for (i = 0; i < dmnsn_array_size(astnode.children); ++i) {
+    dmnsn_astnode item, child;
+    dmnsn_array_get(astnode.children, i, &item);
+
+    switch (item.type) {
+    case DMNSN_AST_IOR:
+      dmnsn_array_get(item.children, 0, &child);
+      interior->ior = dmnsn_realize_float(child);
+      break;
+
+    default:
+      dmnsn_assert(false, "Invalid interior item.");
+    }
+  }
+
+  return interior;
+}
+
 static void
 dmnsn_realize_object_modifiers(dmnsn_astnode astnode, dmnsn_object *object)
 {
@@ -562,6 +591,11 @@ dmnsn_realize_object_modifiers(dmnsn_astnode astnode, dmnsn_object *object)
       object->texture = dmnsn_realize_texture(modifier);
       break;
 
+    case DMNSN_AST_INTERIOR:
+      dmnsn_delete_interior(object->interior);
+      object->interior = dmnsn_realize_interior(modifier);
+      break;
+
     default:
       dmnsn_assert(false, "Invalid object modifier.");
     }