Turned into a lib.

island.h

@@ -0,0 +1,58 @@
+#ifndef ISLAND_H
+#define ISLAND_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef enum TERRAIN_TYPE { DEEP_WATER,
+                            SHALLOW_WATER,
+                            SAND,
+                            GRASS,
+                            FOREST,
+                            HILL,
+                            MOUNTAIN
+                          } terrain_t;
+
+  /**
+   * Generate a diamond-square fractal map.
+   */
+  extern void ds ( float ***, const unsigned int );
+
+  /**
+   * Generate a mask using particle deposition.
+   */
+  extern void island ( int ***, unsigned int );
+
+  /**
+   * Normalize a float matrix between 0 and 1.
+   */
+  extern void norm ( float ***, unsigned int );
+
+  /**
+   * Normalize an int matrix between 0 and 255.
+   */
+  extern void normInt ( int ***, unsigned int );
+
+  /**
+   * Perform a 3x3 average blur.
+   */
+  extern void smooth ( int ***, unsigned int );
+
+  /**
+   * Multiply the diamond square map with the island mask.
+   * Both matrices must have been normalized before.
+   */
+  extern void mult ( float ***, int ***, unsigned int );
+
+  /**
+   * Given a sample from a heightmap, return the terrain
+   * type that correspond it.
+   */
+  terrain_t terrainType( int );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif