Noisy world generation with broken chunk borders

5 files changed, 156 insertions, 11 deletions

diff --git a/src/Math/Noise.cpp b/src/Math/Noise.cpp
new file mode 100644
index 0000000..a174efe
--- /dev/null
+++ b/src/Math/Noise.cpp
@@ -0,0 +1,122 @@
+#include <vector>
+#include "Matrix.hpp"
+#include "Noise.hpp"
+
+namespace Math {
+
+float noise2d(Vector<2> pos) {
+    struct Layer {
+        float scale;
+        Vector<2> offset;
+        float weight;
+    };
+
+    const std::vector<Layer> layers = {
+        {0.1f, {0.0f, 0.0f}, 0.2f},
+        {0.05f, {10.0f, 50.0f}, 0.5f},
+        {0.01f, {250.0f, 20.0f}, 0.5f},
+    };
+
+    auto total_weight = 0.0f;
+    auto res = 0.0f;
+    for (const auto& layer : layers) {
+        auto pos_with_scale_and_offset = (pos - layer.offset) * layer.scale;
+        auto p = pos_with_scale_and_offset.map([](auto x) -> float {
+            float wx = std::fmod(x, NOISE_SEED_SIZE);
+            return wx < 0 ? wx + NOISE_SEED_SIZE : wx;
+        });
+
+        auto x = p.x();
+        auto y = p.y();
+        auto x1 = x - std::fmod(x, 1.0f);
+        auto y2 = y - std::fmod(y, 1.0f);
+        auto x2 = x1 + 1.0f;
+        auto y1 = y2 + 1.0f;
+
+        auto value = [](float x, float y){ return noise_seed[(uint)x][(uint)y] / 255.0f; };
+
+        auto q12 = value(x1, y2);
+        auto q22 = value(x2, y2);
+        auto q11 = value(x1, y1);
+        auto q21 = value(x2, y1);
+
+        auto r1 = q11 * (x2 - x) / (x2 - x1) + q21 * (x - x1) / (x2 - x1);
+        auto r2 = q12 * (x2 - x) / (x2 - x1) + q22 * (x - x1) / (x2 - x1);
+
+        auto r = r1 * (y2 - y) / (y2 - y1) + r2 * (y - y1) / (y2 - y1);
+
+        total_weight += layer.weight;
+        res += r * layer.weight;
+    }
+
+    return res / total_weight;
+}
+
+const uint8_t noise_seed[NOISE_SEED_SIZE][NOISE_SEED_SIZE] = {
+    207, 144, 250, 28, 124, 140, 99, 120, 20, 114, 224, 134, 187, 238, 129, 197, 94, 131, 49, 63, 33, 228, 184, 237, 192, 55, 189, 79, 142, 200, 176, 26, 18, 28, 140, 95, 35, 102, 26, 17, 118, 157, 20, 195, 52, 234, 94, 23, 55, 186, 27, 32, 53, 178, 229, 200, 181, 107, 44, 182, 104, 83, 204, 115,
+    116, 63, 190, 252, 77, 56, 203, 31, 111, 137, 189, 159, 58, 252, 129, 249, 96, 228, 88, 17, 50, 236, 110, 37, 180, 100, 105, 235, 91, 245, 206, 123, 6, 248, 231, 1, 193, 151, 255, 177, 7, 27, 240, 231, 49, 54, 191, 93, 99, 219, 8, 177, 12, 240, 143, 155, 229, 170, 160, 16, 102, 160, 66, 194,
+    137, 130, 104, 225, 17, 37, 207, 183, 99, 161, 219, 134, 201, 6, 165, 140, 159, 11, 134, 55, 122, 232, 241, 41, 105, 183, 69, 127, 100, 69, 226, 180, 142, 209, 17, 75, 120, 224, 152, 119, 84, 18, 247, 198, 153, 107, 115, 142, 79, 220, 251, 161, 227, 202, 183, 34, 21, 151, 240, 80, 75, 149, 59, 216,
+    222, 200, 50, 244, 62, 67, 7, 11, 98, 165, 112, 24, 217, 15, 61, 141, 228, 177, 172, 65, 241, 5, 69, 129, 102, 108, 81, 153, 60, 206, 111, 14, 198, 101, 186, 44, 133, 245, 154, 238, 212, 218, 240, 66, 235, 54, 148, 234, 212, 243, 124, 59, 77, 143, 232, 95, 100, 88, 33, 175, 73, 15, 76, 158,
+    157, 28, 212, 83, 1, 180, 42, 78, 76, 67, 130, 176, 248, 31, 204, 4, 152, 158, 252, 211, 14, 9, 16, 230, 9, 180, 59, 13, 140, 158, 222, 213, 147, 238, 247, 189, 230, 173, 86, 231, 174, 154, 190, 253, 162, 241, 89, 122, 33, 187, 242, 206, 156, 53, 171, 31, 113, 25, 183, 79, 53, 15, 74, 187,
+    98, 226, 172, 127, 160, 169, 246, 2, 117, 180, 28, 42, 252, 84, 36, 59, 171, 249, 206, 5, 206, 62, 64, 109, 96, 183, 177, 130, 245, 243, 78, 253, 194, 94, 154, 243, 239, 171, 162, 100, 117, 254, 70, 170, 203, 46, 180, 136, 144, 123, 28, 204, 66, 145, 90, 202, 127, 99, 216, 17, 39, 98, 175, 129,
+    4, 4, 22, 92, 12, 0, 12, 15, 133, 218, 110, 216, 83, 234, 60, 194, 6, 83, 6, 237, 46, 181, 164, 121, 138, 60, 109, 103, 51, 215, 99, 182, 207, 168, 199, 220, 221, 95, 168, 69, 45, 36, 187, 216, 155, 145, 136, 151, 2, 139, 181, 12, 216, 49, 239, 1, 148, 106, 253, 92, 106, 76, 102, 140,
+    76, 137, 9, 9, 133, 64, 184, 242, 0, 91, 150, 128, 236, 129, 73, 231, 166, 146, 32, 152, 0, 14, 117, 138, 15, 27, 195, 14, 140, 111, 61, 124, 102, 35, 252, 145, 173, 121, 113, 77, 140, 150, 75, 93, 123, 112, 117, 12, 55, 18, 235, 28, 29, 198, 224, 129, 195, 172, 48, 12, 22, 131, 120, 94,
+    154, 93, 49, 28, 49, 226, 43, 231, 226, 165, 37, 21, 245, 32, 16, 153, 193, 43, 20, 154, 87, 66, 148, 81, 52, 129, 228, 156, 103, 254, 2, 85, 245, 158, 96, 177, 112, 57, 231, 84, 162, 154, 207, 213, 106, 58, 17, 176, 67, 112, 13, 64, 36, 160, 183, 217, 2, 33, 228, 133, 89, 228, 45, 154,
+    47, 216, 56, 62, 190, 211, 1, 103, 229, 58, 15, 120, 252, 190, 197, 37, 53, 81, 77, 216, 70, 114, 117, 151, 170, 163, 29, 20, 55, 14, 9, 210, 12, 81, 40, 29, 176, 75, 207, 188, 1, 204, 119, 183, 205, 190, 46, 200, 50, 192, 248, 36, 126, 134, 38, 91, 255, 110, 243, 77, 82, 106, 32, 16,
+    194, 253, 226, 238, 141, 232, 99, 79, 103, 221, 142, 58, 180, 139, 173, 179, 51, 171, 208, 149, 248, 8, 26, 201, 90, 232, 209, 148, 179, 17, 234, 110, 245, 48, 94, 46, 148, 225, 108, 225, 94, 76, 200, 62, 209, 235, 106, 69, 145, 25, 238, 179, 18, 21, 165, 152, 157, 106, 229, 29, 221, 126, 130, 210,
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+    11, 227, 96, 10, 129, 0, 193, 198, 154, 0, 96, 224, 92, 12, 157, 175, 76, 39, 2, 120, 140, 190, 104, 34, 1, 136, 72, 234, 15, 73, 132, 60, 190, 52, 18, 88, 208, 2, 61, 194, 203, 198, 218, 45, 3, 186, 44, 181, 149, 90, 179, 230, 241, 237, 75, 116, 198, 125, 48, 118, 171, 88, 51, 221,
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+    66, 32, 233, 220, 253, 48, 177, 183, 227, 113, 216, 133, 83, 64, 66, 172, 82, 184, 106, 244, 20, 182, 239, 4, 153, 62, 99, 131, 116, 181, 190, 117, 201, 192, 136, 87, 19, 69, 194, 56, 53, 208, 239, 24, 104, 230, 215, 220, 81, 74, 215, 250, 91, 228, 37, 216, 231, 7, 95, 10, 102, 200, 148, 198,
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+    43, 223, 240, 62, 89, 253, 31, 204, 119, 209, 26, 243, 101, 7, 192, 66, 183, 193, 228, 91, 147, 155, 171, 148, 120, 128, 72, 239, 220, 42, 158, 31, 77, 95, 55, 24, 71, 240, 199, 104, 89, 246, 72, 100, 145, 186, 255, 247, 85, 241, 140, 168, 219, 209, 164, 228, 99, 152, 8, 162, 239, 91, 13, 96,
+    111, 55, 212, 219, 40, 74, 28, 107, 24, 149, 71, 139, 202, 136, 118, 238, 70, 199, 107, 231, 42, 131, 71, 70, 68, 188, 100, 145, 10, 112, 221, 79, 200, 120, 249, 188, 162, 1, 39, 181, 252, 92, 179, 217, 127, 139, 171, 64, 96, 212, 41, 134, 131, 189, 231, 4, 18, 171, 213, 246, 124, 49, 73, 6,
+    15, 19, 242, 98, 195, 149, 244, 170, 76, 188, 144, 195, 32, 127, 70, 173, 158, 32, 254, 226, 87, 244, 143, 49, 250, 231, 182, 78, 163, 29, 15, 29, 200, 71, 228, 164, 202, 87, 91, 191, 41, 52, 51, 25, 217, 123, 24, 57, 166, 31, 248, 140, 100, 198, 199, 147, 135, 37, 52, 213, 60, 246, 111, 5,
+    23, 38, 169, 143, 32, 23, 18, 251, 20, 147, 110, 240, 213, 27, 76, 153, 64, 73, 134, 254, 255, 15, 122, 36, 183, 56, 61, 76, 30, 174, 22, 20, 76, 150, 4, 7, 222, 81, 26, 30, 112, 70, 144, 20, 239, 207, 60, 49, 39, 179, 237, 111, 200, 181, 53, 81, 85, 236, 104, 194, 39, 56, 12, 173,
+    102, 188, 223, 74, 198, 30, 223, 208, 27, 219, 245, 40, 243, 172, 60, 7, 125, 246, 108, 158, 106, 21, 246, 3, 161, 234, 202, 22, 128, 130, 32, 171, 181, 28, 35, 70, 237, 85, 202, 99, 188, 91, 98, 122, 179, 74, 85, 137, 237, 95, 17, 92, 146, 120, 123, 215, 203, 125, 63, 198, 175, 123, 232, 223,
+    216, 161, 86, 6, 121, 154, 89, 97, 224, 51, 104, 224, 20, 44, 163, 192, 106, 217, 208, 124, 95, 73, 59, 102, 243, 183, 39, 128, 191, 76, 6, 225, 10, 30, 191, 36, 105, 164, 75, 169, 122, 16, 26, 47, 160, 116, 137, 110, 178, 53, 227, 94, 208, 221, 228, 55, 70, 26, 213, 178, 24, 114, 16, 116,
+    129, 163, 65, 165, 176, 237, 66, 202, 227, 170, 89, 122, 4, 63, 73, 115, 152, 30, 145, 139, 228, 94, 221, 216, 133, 128, 151, 95, 109, 128, 98, 214, 67, 98, 17, 233, 51, 229, 126, 252, 213, 176, 118, 167, 247, 106, 144, 14, 67, 145, 156, 167, 146, 152, 147, 137, 175, 196, 192, 63, 62, 152, 2, 156,
+    253, 163, 81, 205, 185, 31, 154, 153, 115, 56, 225, 161, 236, 254, 145, 231, 215, 159, 141, 217, 61, 156, 19, 120, 80, 133, 208, 126, 214, 120, 128, 160, 218, 100, 251, 202, 250, 101, 44, 48, 55, 146, 223, 133, 165, 230, 221, 214, 187, 14, 42, 70, 107, 220, 41, 151, 249, 153, 255, 12, 57, 75, 149, 207,
+    223, 85, 196, 172, 4, 81, 69, 99, 48, 187, 220, 84, 14, 113, 117, 94, 79, 139, 159, 249, 112, 88, 11, 242, 72, 102, 210, 246, 24, 122, 104, 73, 21, 223, 168, 212, 205, 173, 43, 88, 199, 166, 7, 31, 156, 149, 101, 168, 4, 163, 148, 109, 232, 111, 27, 157, 154, 217, 68, 225, 52, 252, 19, 241,
+    59, 50, 90, 73, 52, 52, 235, 108, 128, 124, 52, 144, 140, 164, 114, 94, 116, 149, 110, 169, 78, 11, 181, 171, 94, 83, 174, 206, 39, 139, 235, 235, 7, 116, 7, 80, 1, 255, 32, 94, 184, 188, 133, 112, 220, 155, 165, 91, 100, 184, 55, 131, 61, 140, 91, 206, 70, 132, 115, 188, 234, 70, 55, 143,
+    164, 234, 119, 62, 172, 116, 198, 147, 27, 69, 116, 69, 14, 62, 31, 228, 205, 118, 120, 112, 4, 207, 166, 80, 55, 70, 23, 29, 204, 159, 186, 84, 49, 102, 120, 245, 212, 89, 115, 169, 203, 192, 205, 10, 118, 106, 36, 230, 71, 198, 52, 111, 220, 110, 35, 58, 131, 172, 42, 158, 24, 158, 55, 217,
+};
+
+}
\ No newline at end of file
diff --git a/src/Math/Noise.hpp b/src/Math/Noise.hpp
new file mode 100644
index 0000000..80ceb47
--- /dev/null
+++ b/src/Math/Noise.hpp
@@ -0,0 +1,13 @@
+#pragma once
+
+#include "Vector.hpp"
+
+#define NOISE_SEED_SIZE 64
+
+namespace Math {
+
+extern const uint8_t noise_seed[NOISE_SEED_SIZE][NOISE_SEED_SIZE];
+
+float noise2d(Vector<2> pos);
+
+}
\ No newline at end of file
diff --git a/src/World/Chunk.hpp b/src/World/Chunk.hpp
index 797a757..4c7810d 100644
--- a/src/World/Chunk.hpp
+++ b/src/World/Chunk.hpp
@@ -8,7 +8,7 @@
 #include "../GFX/Binder.hpp"
 
 #define CHUNK_WIDTH 16
-#define CHUNK_HEIGHT 32
+#define CHUNK_HEIGHT 64
 
 namespace MC::World {
 
diff --git a/src/World/Generator.cpp b/src/World/Generator.cpp
index 757abf2..ee7ece9 100644
--- a/src/World/Generator.cpp
+++ b/src/World/Generator.cpp
@@ -1,20 +1,30 @@
 #include "Generator.hpp"
+#include "../Math/Noise.hpp"
 
 namespace MC::World {
 
 Chunk Generator::generate(int64_t chunk_x, int64_t chunk_y) {
     Chunk chunk(chunk_x, chunk_y);
 
-    for (int y = 0; y < CHUNK_HEIGHT; y++) {
-        BlockType type = BlockType::Air;
-        if (y < CHUNK_HEIGHT / 2) {
-            type = BlockType::Dirt;
-        } else if (y == CHUNK_HEIGHT / 2) {
-            type = BlockType::Grass;
-        }
+    uint8_t extent = 60;
+    uint8_t base = 4;
+
+    for (int x = 0; x < CHUNK_WIDTH; x++) {
+        for (int z = 0; z < CHUNK_WIDTH; z++) {
+            float noise = Math::noise2d(
+                {(float)chunk_x * CHUNK_WIDTH + x, (float)chunk_y * CHUNK_WIDTH + z}
+            ) * extent + base;
+
+            uint height = std::round(noise);
+
+            for (int y = 0; y < CHUNK_HEIGHT; y++) {
+                BlockType type = BlockType::Air;
+                if (y < height) {
+                    type = BlockType::Dirt;
+                } else if (y == height) {
+                    type = BlockType::Grass;
+                }
 
-        for (int x = 0; x < CHUNK_WIDTH; x++) {
-            for (int z = 0; z < CHUNK_WIDTH; z++) {
                 chunk.set(x, y, z, type);
             }
         }
diff --git a/src/main.cpp b/src/main.cpp
index e600802..5d5af2f 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -55,7 +55,7 @@ void run() {
     MC::World::World world;
 
     MC::GFX::Camera camera{};
-    camera.set_position({0.0f, 22.0f, 0.0f});
+    camera.set_position({0.0f, 50.0f, 0.0f});
 
     MC::GFX::Shading::Program program(
         MC::GFX::Shading::Shader::create_fragment(),