Beginning work on graphics

source/text_engine.cpp

@@ -0,0 +1,43 @@
+#include <tonc.h>
+
+#include "text_engine.h"
+
+const int H_MAX = 240;
+const int V_MAX = 160;
+const int LEFT = 16;
+const int RIGHT = H_MAX - LEFT;
+const int TOP = 122;
+const int BOTTOM = V_MAX;
+
+uint char_count = 0;
+
+text_engine::text_engine()
+{
+    OBJ_ATTR *objs = &oam_mem[127];
+    tte_init_obj_default(objs);
+    tte_set_margins(LEFT, TOP, RIGHT, BOTTOM);
+    tte_set_pos(LEFT, TOP);
+    curr_string = "Hello there! Welcome to\nthe world of Pokemon!";
+    next_string = "My name is OAK, but you\ncan call me professor.";
+    frame_count = 0;
+}
+
+void text_engine::next_frame()
+{
+    tte_set_pos(LEFT, TOP);
+    if(char_count < curr_string.length()){
+    if (frame_count % 2 == 0 || key_held(KEY_B))
+    {
+        char_count++;
+        tte_erase_rect(LEFT, TOP, RIGHT, BOTTOM);
+        tte_write(curr_string.substr(0, char_count).c_str());
+    }
+    } else {
+        if(key_hit(KEY_A)){
+            curr_string = next_string;
+            char_count = 0;
+        }
+    }
+
+    frame_count++;
+}