Implement Chimeric monsters

After creating the monster, the make_chimera function
in mon-chimera.cc can be used to set its component
creatures.

1 files changed, 67 insertions, 0 deletions

diff --git a/crawl-ref/source/mon-chimera.cc b/crawl-ref/source/mon-chimera.cc
new file mode 100644
index 0000000000..18adda7095
--- /dev/null
+++ b/crawl-ref/source/mon-chimera.cc
@@ -0,0 +1,67 @@
+/**
+ * @file
+ * @brief Chimeric beasties
+**/
+
+#include "AppHdr.h"
+#include "mon-chimera.h"
+
+#include "externs.h"
+#include "enum.h"
+#include "mon-info.h"
+#include "mon-util.h"
+#include "monster.h"
+
+#include <sstream>
+
+static void apply_chimera_part(monster* mon, monster_type part, int partnum);
+
+void make_chimera(monster* mon, monster_type part1, monster_type part2, monster_type part3)
+{
+    ASSERT(part1 != MONS_NO_MONSTER);
+    ASSERT(!invalid_monster_type(part1));
+    ASSERT(part2 != MONS_NO_MONSTER);
+    ASSERT(!invalid_monster_type(part2));
+    ASSERT(part3 != MONS_NO_MONSTER);
+    ASSERT(!invalid_monster_type(part3));
+
+    // Set type to the original type to calculate appropriate stats.
+    mon->type = part1;
+    mon->base_monster = MONS_PROGRAM_BUG;
+    define_monster(mon);
+
+    mon->type         = MONS_CHIMERA;
+    mon->base_monster = part1;
+    mon->props["chimera_part_2"] = part2;
+    mon->props["chimera_part_3"] = part3;
+    apply_chimera_part(mon,part2,2);
+    apply_chimera_part(mon,part3,3);
+}
+
+static void apply_chimera_part(monster* mon, monster_type part, int partnum)
+{
+    // TODO: Enforce more rules about the Chimera parts so things
+    // can't get broken
+    ASSERT(!mons_class_is_zombified(part));
+
+    // Create a temp monster to transfer properties
+    monster dummy;
+    dummy.type = part;
+    define_monster(&dummy);
+}
+
+string monster_info::chimera_part_names() const
+{
+    if (!props.exists("chimera_part_2") || !props.exists("chimera_part_3"))
+        return "";
+
+    monster_type chimtype2 = static_cast<monster_type>(props["chimera_part_2"].get_int());
+    monster_type chimtype3 = static_cast<monster_type>(props["chimera_part_3"].get_int());
+    ASSERT(chimtype2 > MONS_PROGRAM_BUG && chimtype2 < NUM_MONSTERS);
+    ASSERT(chimtype3 > MONS_PROGRAM_BUG && chimtype3 < NUM_MONSTERS);
+
+    ostringstream s;
+    s << "-" << get_monster_data(chimtype2)->name
+      << "-" << get_monster_data(chimtype3)->name;
+    return s.str();
+}