first attempt at world generation

[blank.git] / src / world.cpp

diff --git a/src/world.cpp b/src/world.cpp
index aa65bef7a3aa6cb88ae94d6dac2173f1a9b202b6..57583e6ed4e2267a48a241412a16159ddf7c42ab 100644 (file)
--- a/src/world.cpp
+++ b/src/world.cpp
@@ -164,6 +164,8 @@ World::World()
 , blockShape({{ -0.5f, -0.5f, -0.5f }, { 0.5f, 0.5f, 0.5f }})
 , stairShape({{ -0.5f, -0.5f, -0.5f }, { 0.5f, 0.5f, 0.5f }}, { 0.0f, 0.0f })
 , slabShape({{ -0.5f, -0.5f, -0.5f }, { 0.5f, 0.0f, 0.5f }})
+, blockNoise(0)
+, colorNoise(1)
 , chunks() {
        blockType.Add(BlockType{ true, { 1.0f, 1.0f, 1.0f }, &blockShape }); // white block
        blockType.Add(BlockType{ true, { 1.0f, 1.0f, 1.0f }, &stairShape }); // white stair
@@ -181,9 +183,9 @@ World::World()
 
 
 void World::Generate() {
-       for (int z = -1; z < 2; ++z) {
-               for (int y = -1; y < 2; ++y) {
-                       for (int x = -1; x < 2; ++x) {
+       for (int z = -2; z < 3; ++z) {
+               for (int y = -2; y < 3; ++y) {
+                       for (int x = -2; x < 3; ++x) {
                                Generate(glm::vec3(x, y, z));
                        }
                }
@@ -194,28 +196,26 @@ Chunk &World::Generate(const glm::vec3 &pos) {
        chunks.emplace_back();
        Chunk &chunk = chunks.back();
        chunk.Position(pos);
-       for (size_t i = 1; i < blockType.Size(); ++i) {
-               chunk.BlockAt(i) = Block(blockType[i]);
-               chunk.BlockAt(i + 257) = Block(blockType[i]);
-               chunk.BlockAt(i + 514) = Block(blockType[i]);
-       }
-       if (false) {
-               chunk.BlockAt(glm::vec3(0, 0, 0)) = Block(blockType[4]);
-               chunk.BlockAt(glm::vec3(0, 0, 1)) = Block(blockType[1]);
-               chunk.BlockAt(glm::vec3(1, 0, 0)) = Block(blockType[5]);
-               chunk.BlockAt(glm::vec3(1, 0, 1)) = Block(blockType[3]);
-               chunk.BlockAt(glm::vec3(2, 0, 0)) = Block(blockType[4]);
-               chunk.BlockAt(glm::vec3(2, 0, 1)) = Block(blockType[1]);
-               chunk.BlockAt(glm::vec3(3, 0, 0)) = Block(blockType[2]);
-               chunk.BlockAt(glm::vec3(3, 0, 1)) = Block(blockType[5]);
-               chunk.BlockAt(glm::vec3(2, 0, 2)) = Block(blockType[4]);
-               chunk.BlockAt(glm::vec3(2, 0, 3)) = Block(blockType[1]);
-               chunk.BlockAt(glm::vec3(3, 0, 2)) = Block(blockType[2]);
-               chunk.BlockAt(glm::vec3(3, 0, 3)) = Block(blockType[5]);
-               chunk.BlockAt(glm::vec3(1, 1, 0)) = Block(blockType[5]);
-               chunk.BlockAt(glm::vec3(1, 1, 1)) = Block(blockType[4]);
-               chunk.BlockAt(glm::vec3(2, 1, 1)) = Block(blockType[3]);
-               chunk.BlockAt(glm::vec3(2, 2, 1)) = Block(blockType[2]);
+       if (pos.x == 0 && pos.y == 0 && pos.z == 0) {
+               for (size_t i = 1; i < blockType.Size(); ++i) {
+                       chunk.BlockAt(i) = Block(blockType[i]);
+                       chunk.BlockAt(i + 257) = Block(blockType[i]);
+                       chunk.BlockAt(i + 514) = Block(blockType[i]);
+               }
+       } else {
+               for (int z = 0; z < Chunk::Depth(); ++z) {
+                       for (int y = 0; y < Chunk::Height(); ++y) {
+                               for (int x = 0; x < Chunk::Width(); ++x) {
+                                       glm::vec3 block_pos{float(x), float(y), float(z)};
+                                       glm::vec3 gen_pos = (pos * Chunk::Extent() + block_pos) / 64.0f;
+                                       float val = blockNoise(gen_pos);
+                                       if (val > 0.8f) {
+                                               int col_val = int((colorNoise(gen_pos) + 1.0f) * 2.0f) % 4;
+                                               chunk.BlockAt(block_pos) = Block(blockType[col_val * 3 + 1]);
+                                       }
+                               }
+                       }
+               }
        }
        chunk.Invalidate();
        return chunk;