Maps engines

copying.md

@@ -52,6 +52,7 @@ _the openage authors_ are:
 | Niklas Fiekas               | niklasf                     | niklas.fiekas@tu-clausthal.de         |
 | Charles Gould               | charlesrgould               | charles.r.gould@gmail.com             |
 | Wilco Kusee                 | detrumi                     | wilcokusee@gmail.com                  |
+| Timo Haas                   | alue-42                     | haastimo@gmx.de                       |
 
 If you're a first-time commiter, add yourself to the above list. This is not
 just for legal reasons, but also to keep an overview of all those nicknames.

cpp/CMakeLists.txt

@@ -34,6 +34,7 @@ add_subdirectory("coord")
 add_subdirectory("crossplatform")
 add_subdirectory("datastructure")
 add_subdirectory("log")
+add_subdirectory("mapgen")
 add_subdirectory("job")
 add_subdirectory("keybinds")
 add_subdirectory("pathfinding")

cpp/game_main.cpp

@@ -18,6 +18,7 @@
 #include "game_save.h"
 #include "keybinds/keybind_manager.h"
 #include "log/log.h"
+#include "mapgen/mapgen.h"
 #include "terrain/terrain.h"
 #include "unit/action.h"
 #include "unit/command.h"
@@ -41,30 +42,6 @@ namespace openage {
  * Please try to move out anything located in here and create engine features instead.
  */
 
-// size of the initial terrain
-constexpr coord::tile_delta terrain_data_size = {16, 16};
-
-// terrain ids for the initial terrain
-constexpr int terrain_data[16 * 16] = {
-	  0,  0,  0,  0,  0,  0,  0,  0, 16,  0,  2,  1, 15, 15, 15,  1,
-	  0, 18, 18, 18, 18, 18,  0,  0, 16,  0,  2,  1, 15, 14, 15,  1,
-	 18, 18,  0,  0, 18, 18,  0,  0, 16,  0,  2,  1, 15, 15, 15,  1,
-	 18, 18,  0,  0, 18, 18,  0,  0, 16,  0,  2,  1,  1,  1,  2,  2,
-	 18, 18, 18,  0, 18, 18,  9,  9, 16,  0,  0,  2,  2,  2,  0,  0,
-	 18, 18,  0,  0,  0,  0,  9,  9, 16,  0,  0,  0,  0,  0,  0,  0,
-	  0, 18,  0,  0,  0,  9,  9,  9, 16,  0,  0,  0,  0,  0,  0,  0,
-	  0,  0,  0,  2,  0,  9,  9,  0,  2,  2,  0,  0,  0,  0, 23, 23,
-	  0,  0,  2, 15,  2,  9,  0,  2, 15, 15,  2,  0,  0,  0,  0,  0,
-	  0,  0,  2, 15,  2,  2,  2, 15,  2,  2,  0,  0,  0,  0,  0,  0,
-	  0,  0,  2, 15,  2,  2,  2, 15,  2,  0,  0,  0, 20, 20, 20,  0,
-	  0,  2,  2, 15,  2,  2,  2, 14,  2,  0,  0,  0, 21, 21, 21,  0,
-	  2, 15, 15, 15, 15, 15, 14, 14,  2,  0,  0,  0, 22, 22, 22,  0,
-	  0,  2,  2,  2,  2,  2,  2,  2,  0,  0,  0,  0,  5,  5,  5,  0,
-	  0,  0,  0,  0,  0,  0,  0,  0, 16, 16, 16, 16,  5,  5,  5,  5,
-	  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  5,  5
-};
-
-
 int run_game(Arguments *args) {
 	util::Timer timer;
 
@@ -144,7 +121,10 @@ GameMain::GameMain(Engine *engine)
 
 	// create the terrain which will be filled by chunks
 	this->terrain = std::make_shared<Terrain>(assetmanager, terrain_types, blending_modes, true);
-	this->terrain->fill(terrain_data, terrain_data_size);
+	// choose map engine
+ 	mapgen::MapGen mapgen{1,16,mapgen::MapGen::Engine::Mandelbrot};
+
+	this->terrain->fill(mapgen.generate(), mapgen.get_size());
 	this->placed_units.set_terrain(this->terrain);
 
 	// players

cpp/mapgen/CMakeLists.txt

@@ -0,0 +1,8 @@
+add_sources(${PROJECT_NAME}
+	mapgen.cpp
+	mapgenbase.cpp
+)
+
+add_subdirectory(static)
+add_subdirectory(diamondsquare)
+add_subdirectory(mandelbrot)

cpp/mapgen/diamondsquare/CMakeLists.txt

@@ -0,0 +1,5 @@
+add_sources(${PROJECT_NAME}
+	diamondsquare.cpp
+	land_gen.cpp
+	heightmap.cpp
+)

cpp/mapgen/diamondsquare/diamondsquare.cpp

@@ -0,0 +1,39 @@
+// Copyright 2015-2015 the openage authors. See copying.md for legal info.
+
+#include <vector>
+
+#include "diamondsquare.h"
+#include "heightmap.h"
+#include "../../log/log.h"
+#include "../mapgen.h"
+#include "../mapgenbase.h"
+
+namespace openage {
+namespace mapgen {
+
+
+Diamondsquare::Diamondsquare(int chunks_per_side, int chunk_size)
+	:
+	MapGenBase(chunks_per_side,chunk_size) {}
+
+int *Diamondsquare::generate() {
+	Heightmap heightmap(this->size);
+	heightmap.generate();
+
+	for (int y = 0; y < this->size.se; y++) {
+		for (int x = 0; x < this->size.ne; x++) {
+			float height = heightmap.tile(x, y);
+			int index = this->size.ne * y + x;
+			if (height > 0) {
+				this->map[index] = MapGen::Terrain::Dirt_1;
+			} else if (height == 0) {
+				this->map[index] = MapGen::Terrain::Water_Dark;
+			}
+		}
+	}
+
+	return this->map.data();
+}
+
+} // namespace mapgen
+} // namespace openage

cpp/mapgen/diamondsquare/diamondsquare.h

@@ -0,0 +1,29 @@
+// Copyright 2015-2015 the openage authors. See copying.md for legal info.
+
+#ifndef OPENAGE_MAPGEN_DIAMONDSQUARE_H_
+#define OPENAGE_MAPGEN_DIAMONDSQUARE_H_
+
+#include <stddef.h>
+#include <vector>
+
+#include "../../coord/tile.h"
+#include "../mapgenbase.h"
+
+namespace openage {
+namespace mapgen {
+
+
+class Diamondsquare : public MapGenBase {
+public:
+
+	Diamondsquare(int chunks_per_size, int chunk_size);
+	~Diamondsquare();
+
+	int *generate();
+
+};
+
+} // namespace mapgen
+} // namespace openage
+
+#endif

cpp/mapgen/diamondsquare/heightmap.cpp

@@ -0,0 +1,137 @@
+// Copyright 2015-2015 the openage authors. See copying.md for legal info.
+
+#include <cmath>
+#include <ctime>
+
+#include "heightmap.h"
+#include "../../log/log.h"
+
+namespace openage {
+namespace mapgen {
+
+Heightmap::Heightmap(coord::tile_delta size)
+	:
+	rng{(uint64_t)std::time(nullptr)} {
+
+	// Get the biggest side, and round it up to 2^n + 1
+	this->side_length = std::max(size.ne, size.se);
+	this->side_length = std::exp2(std::ceil(std::log2(static_cast<float>(this->side_length)))) + 1;
+
+	this->map.reserve(this->side_length * this->side_length);
+}
+
+std::vector<float> &Heightmap::generate() {
+	const float roughness = 1.5;
+
+	int dist = this->side_length - 1;
+	float displacement = 1;
+
+	// Initialize
+	this->tile(0, 0) = 0;
+	this->tile(dist, 0) = 0;
+	this->tile(0, dist) = 0;
+	this->tile(dist, dist) = 0;
+
+	while (dist > 1) {
+		log::log(MSG(dbg) << "dist = " << dist);
+		int mid = dist / 2;
+
+		// Diamond step: for each square, calculate the center from the corners
+		// (x-mid,y-mid)  (x+mid,y-mid)
+		//            \    /
+		//            (x,y)
+		//            /    \
+		// (x-mid,y+mid)  (x+mid,y+mid)
+		for (int y = mid; y < this->side_length; y += dist) {
+			for (int x = mid; x < this->side_length; x += dist) {
+				float diamond = 0;
+
+				// Add corner values
+				diamond += this->tile(x-mid, y-mid);
+				diamond += this->tile(x+mid, y-mid);
+				diamond += this->tile(x-mid, y+mid);
+				diamond += this->tile(x+mid, y+mid);
+
+				this->tile(x, y) = this->displace(diamond, 4, displacement);
+				log::log(MSG(dbg) << "diamond (" << x << "," << y << ") -> " << this->tile(x, y));
+			}
+		}
+
+		// Square step: for each diamond, calculate the center from the adjacent values
+		//             (x,y-mid)
+		//                |
+		// (x-mid,y) -- (x,y) -- (x+mid,y)
+		//                |
+		//             (x,y+mid)
+
+		// Handle tiles above and below diamond centers
+		for (int y = 0; y < this->side_length; y += dist) {
+			bool is_top = (y == 0);
+			bool is_bottom = (y == this->side_length - 1);
+			for (int x = mid; x < this->side_length; x += dist) {
+				float square = 0;
+				int neighbors = 2;
+
+				// Add neighbor values
+				if (!is_top) {
+					square += this->tile(x, y - mid);
+					neighbors++;
+				}
+				square += this->tile(x - mid, y);
+				square += this->tile(x + mid, y);
+				if (!is_bottom) {
+					square += this->tile(x, y + mid);
+					neighbors++;
+				}
+
+				this->tile(x, y) = this->displace(square, neighbors, displacement);
+				log::log(MSG(dbg) << "square1 (" << x << "," << y << ") -> " << this->tile(x, y));
+			}
+		}
+
+		// Handle tiles left and right of diamond centers
+		for (int y = mid; y < this->side_length; y += dist) {
+			for (int x = 0; x < this->side_length; x += dist) {
+				bool is_left = (x == 0);
+				bool is_right = (x == this->side_length - 1);
+
+				float square = 0;
+				int neighbors = 2;
+
+				// Add neighbor values
+				square += this->tile(x, y - mid);
+				if (!is_left) {
+					square += this->tile(x - mid, y);
+					neighbors++;
+				}
+				if (!is_right) {
+					square += this->tile(x + mid, y);
+					neighbors++;
+				}
+				square += this->tile(x, y + mid);
+
+				this->tile(x, y) = this->displace(square, neighbors, displacement);
+				log::log(MSG(dbg) << "square2 (" << x << "," << y << ") -> " << this->tile(x, y));
+			}
+		}
+
+		dist = mid;
+		displacement *= std::pow(2.0, -roughness);
+	}
+
+	return this->map;
+}
+
+float &Heightmap::tile(int x, int y) {
+	return this->map[this->side_length * y + x];
+}
+
+float Heightmap::displace(float value, int neighbors, float displacement) {
+	// Calculate average + offset
+	value /= neighbors;
+	value += this->rng.real_range(-displacement, displacement);
+	return value;
+}
+
+} // namespace mapgen
+} // namespace openage

cpp/mapgen/diamondsquare/heightmap.h

@@ -0,0 +1,36 @@
+// Copyright 2015-2015 the openage authors. See copying.md for legal info.
+
+#ifndef OPENAGE_MAPGEN_HEIGHTMAP_H_
+#define OPENAGE_MAPGEN_HEIGHTMAP_H_
+
+#include <vector>
+
+#include "../../coord/tile.h"
+#include "../../rng/rng.h"
+
+namespace openage {
+namespace mapgen {
+
+/**
+ * Heightmap generation using the diamond-square algorithm
+ */
+class Heightmap {
+public:
+	Heightmap(coord::tile_delta size);
+
+	std::vector<float> &generate();
+
+	float &tile(int x, int y);
+private:
+	int side_length;
+
+	float displace(float value, int neighbors, float displacement);
+
+	std::vector<float> map;
+	rng::RNG rng;
+};
+
+} // namespace mapgen
+} // namespace openage
+
+#endif

cpp/mapgen/diamondsquare/land_gen.cpp

@@ -0,0 +1,11 @@
+// Copyright 2015-2015 the openage authors. See copying.md for legal info.
+
+#include "land_gen.h"
+#include "heightmap.h"
+
+namespace openage {
+namespace mapgen {
+
+
+} // namespace mapgen
+} // namespace openage

cpp/mapgen/diamondsquare/land_gen.h

@@ -0,0 +1,18 @@
+// Copyright 2015-2015 the openage authors. See copying.md for legal info.
+
+#ifndef OPENAGE_MAPGEN_LAND_GEN_H_
+#define OPENAGE_MAPGEN_LAND_GEN_H_
+
+namespace openage {
+namespace mapgen {
+
+struct Land {
+	int terrain_type;
+
+	int land_percent;
+};
+
+} // namespace mapgen
+} // namespace openage
+
+#endif

cpp/mapgen/mandelbrot/CMakeLists.txt

@@ -0,0 +1,3 @@
+add_sources(${PROJECT_NAME}
+	mandelbrot.cpp
+)