optimize (part 1)

src/graphics/core/Mesh.cpp

@@ -58,10 +58,9 @@ void Mesh::reload(const float* vertexBuffer, size_t vertices, const int* indexBu
     glBindVertexArray(vao);
     glBindBuffer(GL_ARRAY_BUFFER, vbo);
     if (vertexBuffer != nullptr && vertices != 0) {
-        glBufferData(GL_ARRAY_BUFFER, sizeof(float) * vertexSize * vertices, vertexBuffer, GL_STATIC_DRAW);
-    }
-    else {
-        glBufferData(GL_ARRAY_BUFFER, 0, {}, GL_STATIC_DRAW);
+        glBufferData(GL_ARRAY_BUFFER, sizeof(float) * vertexSize * vertices, vertexBuffer, GL_STREAM_DRAW);
+    } else {
+        glBufferData(GL_ARRAY_BUFFER, 0, {}, GL_STREAM_DRAW);
     }
     if (indexBuffer != nullptr && indices != 0) {
         if (ibo == 0) glGenBuffers(1, &ibo);

src/graphics/render/BlocksRenderer.cpp

@@ -498,6 +498,9 @@ SortingMeshData BlocksRenderer::renderTranslucent(
 ) {
     SortingMeshData sortingMesh {{}};
 
+    AABB aabb {};
+    bool aabbInit = false;
+    size_t totalSize = 0;
     for (const auto drawGroup : *content.drawGroups) {
         int begin = beginEnds[drawGroup][0];
         if (begin == 0) {
@@ -557,21 +560,51 @@ SortingMeshData BlocksRenderer::renderTranslucent(
                 ),
                 util::Buffer<float>(indexSize * VERTEX_SIZE)};
 
+            totalSize += entry.vertexData.size();
+
             for (int j = 0; j < indexSize; j++) {
                 std::memcpy(
                     entry.vertexData.data() + j * VERTEX_SIZE,
                     vertexBuffer.get() + indexBuffer[j] * VERTEX_SIZE,
                     sizeof(float) * VERTEX_SIZE
                 );
-                entry.vertexData[j * VERTEX_SIZE + 0] += chunk->x * CHUNK_W + 0.5f;
-                entry.vertexData[j * VERTEX_SIZE + 1] += 0.5f;
-                entry.vertexData[j * VERTEX_SIZE + 2] += chunk->z * CHUNK_D + 0.5f;
+                float& vx = entry.vertexData[j * VERTEX_SIZE + 0];
+                float& vy = entry.vertexData[j * VERTEX_SIZE + 1];
+                float& vz = entry.vertexData[j * VERTEX_SIZE + 2];
+
+                if (!aabbInit) {
+                    aabbInit = true;
+                    aabb.a = aabb.b = {vx, vy, vz};
+                } else {
+                    aabb.addPoint(glm::vec3(vx, vy, vz));
+                }
+                vx += chunk->x * CHUNK_W + 0.5f;
+                vy += 0.5f;
+                vz += chunk->z * CHUNK_D + 0.5f;
             }
             sortingMesh.entries.push_back(std::move(entry));
             vertexOffset = 0;
             indexOffset = indexSize = 0;
         }
     }
+
+    // additional powerful optimization
+    auto size = aabb.size();
+    if (glm::abs(size.y) < 0.01f && sortingMesh.entries.size() > 1 && false) {
+        SortingMeshEntry newEntry {
+            sortingMesh.entries[0].position,
+            util::Buffer<float>(totalSize)
+        };
+        size_t offset = 0;
+        for (const auto& entry : sortingMesh.entries) {
+            std::memcpy(
+                newEntry.vertexData.data() + offset,
+                entry.vertexData.data(), entry.vertexData.size() * sizeof(float)
+            );
+            offset += entry.vertexData.size();
+        }
+        return SortingMeshData {{std::move(newEntry)}};
+    }
     return sortingMesh;
 }
 

src/graphics/render/ChunksRenderer.cpp

@@ -79,6 +79,10 @@ ChunksRenderer::ChunksRenderer(
         *level->content, cache, settings
     );
     logger.info() << "created " << threadPool.getWorkersCount() << " workers";
+
+    const vattr attrs[]{ {3}, {2}, {1}, {0} };
+    float buf[]{};
+    sortedMesh = std::make_unique<Mesh>(buf, 0, attrs);
 }
 
 ChunksRenderer::~ChunksRenderer() {
@@ -210,16 +214,19 @@ void ChunksRenderer::drawChunks(
 }
 
 void ChunksRenderer::drawSortedMeshes(const Camera& camera, Shader& shader) {
-    const vattr attrs[]{ {3}, {2}, {1}, {0} };
+    timeutil::ScopeLogTimer log(444);
 
     std::vector<const SortingMeshEntry*> entries;
 
+    const auto& chunks = level.chunks->getChunks();
+
     auto pposition = camera.position;
     
     size_t size = 0;
     bool culling = settings.graphics.frustumCulling.get();
-    for (size_t i = 0; i < indices.size(); i++) {
-        auto chunk = level.chunks->getChunks()[indices[i].index];
+    
+    for (const auto& index : indices) {
+        const auto& chunk = chunks[index.index];
         if (chunk == nullptr || !chunk->flags.lighted) {
             continue;
         }
@@ -238,19 +245,22 @@ void ChunksRenderer::drawSortedMeshes(const Camera& camera, Shader& shader) {
         if (!frustum.isBoxVisible(min, max)) continue;
 
         auto& chunkEntries = found->second.sortingMesh.entries;
+        
         for (auto& entry : chunkEntries) {
-            entry.distance = glm::distance2(entry.position, pposition);
+            entry.distance = static_cast<long long>(glm::distance2(entry.position, pposition));
         }
+        std::sort(chunkEntries.begin(), chunkEntries.end());
         for (const auto& entry : chunkEntries) {
             size += entry.vertexData.size();
             entries.push_back(&entry);
         }
     }
-    std::sort(entries.begin(), entries.end(), [=](const auto& a, const auto& b) {
-        return *a < *b;
-    });
 
-    util::Buffer<float> buffer(size);
+    static util::Buffer<float> buffer;
+    
+    if (buffer.size() < size) {
+        buffer = util::Buffer<float>(size);
+    }
     size_t offset = 0;
     for (const auto& entry : entries) {
         std::memcpy(
@@ -260,8 +270,8 @@ void ChunksRenderer::drawSortedMeshes(const Camera& camera, Shader& shader) {
         );
         offset += entry->vertexData.size();
     }
-    Mesh mesh(buffer.data(), size / 6, attrs);
+    sortedMesh->reload(buffer.data(), size / 6);
 
     shader.uniformMatrix("u_model", glm::mat4(1.0f));
-    mesh.draw();
+    sortedMesh->draw();
 }

src/graphics/render/ChunksRenderer.hpp

@@ -54,6 +54,7 @@ class ChunksRenderer {
     bool drawChunk(
         size_t index, const Camera& camera, Shader& shader, bool culling
     );
+    std::unique_ptr<Mesh> sortedMesh;
 public:
     ChunksRenderer(
         const Level* level,

src/graphics/render/commons.hpp

@@ -12,7 +12,7 @@ class Mesh;
 struct SortingMeshEntry {
     glm::vec3 position;
     util::Buffer<float> vertexData;
-    float distance;
+    long long distance;
 
     inline bool operator<(const SortingMeshEntry& o) const noexcept {
         return distance > o.distance;