add MainBatch & refactor ModelBatch, Batch3D

src/graphics/render/ModelBatch.hpp

@@ -13,6 +13,7 @@ class Texture;
 class Chunks;
 class Assets;
 struct EngineSettings;
+class MainBatch;
 
 namespace model {
     struct Mesh;
@@ -22,47 +23,15 @@ namespace model {
 using texture_names_map = std::unordered_map<std::string, std::string>;
 
 class ModelBatch {
-    std::unique_ptr<float[]> const buffer;
-    size_t const capacity;
-    size_t index;
-
-    std::unique_ptr<Mesh> mesh;
-    std::unique_ptr<Texture> blank;
-
     Assets* assets;
     Chunks* chunks;
-    const Texture* texture = nullptr;
-    UVRegion region {0.0f, 0.0f, 1.0f, 1.0f};
+
     const EngineSettings* settings;
     glm::vec3 lightsOffset {};
 
     static inline glm::vec3 SUN_VECTOR {0.411934f, 0.863868f, -0.279161f};
 
-    inline void vertex(
-        glm::vec3 pos, glm::vec2 uv, glm::vec4 light, glm::vec3 tint
-    ) {
-        float* buffer = this->buffer.get();
-        buffer[index++] = pos.x;
-        buffer[index++] = pos.y;
-        buffer[index++] = pos.z;
-        buffer[index++] = uv.x * region.getWidth() + region.u1;
-        buffer[index++] = uv.y * region.getHeight() + region.v1;
-        buffer[index++] = tint.x;
-        buffer[index++] = tint.y;
-        buffer[index++] = tint.z;
-
-        union {
-            float floating;
-            uint32_t integer;
-        } compressed;
-
-        compressed.integer  = (static_cast<uint32_t>(light.r * 255) & 0xff) << 24;
-        compressed.integer |= (static_cast<uint32_t>(light.g * 255) & 0xff) << 16;
-        compressed.integer |= (static_cast<uint32_t>(light.b * 255) & 0xff) << 8;
-        compressed.integer |= (static_cast<uint32_t>(light.a * 255) & 0xff);
-
-        buffer[index++] = compressed.floating;
-    }
+    std::unique_ptr<MainBatch> batch;
 
     void draw(const model::Mesh& mesh, 
               const glm::mat4& matrix, 
@@ -72,8 +41,6 @@ class ModelBatch {
               bool backlight);
     void setTexture(const std::string& name,
                     const texture_names_map* varTextures);
-    void setTexture(const Texture* texture);
-    void flush();
 
     struct DrawEntry {
         glm::mat4 matrix;