add in-world lines renderer

src/graphics/render/LinesRenderer.cpp

@@ -0,0 +1,14 @@
+#include "LinesRenderer.hpp"
+
+#include "graphics/core/LineBatch.hpp"
+
+void LinesRenderer::draw(LineBatch& batch) {
+    for (const auto& line : queue) {
+        batch.line(line.a, line.b, line.color);
+    }
+    queue.clear();
+}
+
+void LinesRenderer::pushLine(const glm::vec3& a, const glm::vec3& b, const glm::vec4& color) {
+    queue.push_back({a, b, color});
+}

src/graphics/render/LinesRenderer.hpp

@@ -0,0 +1,22 @@
+#pragma once
+
+#include <glm/vec3.hpp>
+#include <glm/vec4.hpp>
+#include <vector>
+
+class LineBatch;
+
+class LinesRenderer {
+public:
+    struct Line {
+        glm::vec3 a;
+        glm::vec3 b;
+        glm::vec4 color;
+    };
+
+    void draw(LineBatch& batch);
+
+    void pushLine(const glm::vec3& a, const glm::vec3& b, const glm::vec4& color);
+private:
+    std::vector<Line> queue;
+};

src/graphics/render/WorldRenderer.cpp

@@ -52,6 +52,7 @@
 #include "TextsRenderer.hpp"
 #include "ChunksRenderer.hpp"
 #include "GuidesRenderer.hpp"
+#include "LinesRenderer.hpp"
 #include "ModelBatch.hpp"
 #include "Skybox.hpp"
 #include "Emitter.hpp"
@@ -118,6 +119,7 @@ WorldRenderer::WorldRenderer(
     hands = std::make_unique<HandsRenderer>(
         *assets, *modelBatch, skeletons->createSkeleton("hand", &skeletonConfig)
     );
+    lines = std::make_unique<LinesRenderer>();
 }
 
 WorldRenderer::~WorldRenderer() = default;
@@ -481,6 +483,10 @@ void WorldRenderer::draw(
         // Drawing background sky plane
         skybox->draw(ctx, camera, assets, worldInfo.daytime, clouds);
 
+        linesShader.use();
+        lines->draw(*lineBatch);
+        lineBatch->flush();
+
         {
             auto sctx = ctx.sub();
             sctx.setCullFace(true);

src/graphics/render/WorldRenderer.hpp

@@ -23,6 +23,7 @@ class PrecipitationRenderer;
 class HandsRenderer;
 class NamedSkeletons;
 class GuidesRenderer;
+class LinesRenderer;
 class TextsRenderer;
 class Shader;
 class Frustum;
@@ -102,6 +103,7 @@ public:
     std::unique_ptr<BlockWrapsRenderer> blockWraps;
     std::unique_ptr<PrecipitationRenderer> precipitation;
     std::unique_ptr<NamedSkeletons> skeletons;
+    std::unique_ptr<LinesRenderer> lines;
 
     static bool showChunkBorders;
     static bool showEntitiesDebug;