1.20.4 compatibility

remappedSrc/themixray/repeating/mod/render/buffer/BufferManager.java

@@ -0,0 +1,48 @@
+package themixray.repeating.mod.render.buffer;
+
+import lombok.experimental.UtilityClass;
+import net.fabricmc.fabric.api.client.event.lifecycle.v1.ClientLifecycleEvents;
+
+import java.nio.FloatBuffer;
+
+import static org.lwjgl.opengl.GL33.*;
+
+@UtilityClass
+public class BufferManager {
+    private int vao;
+    private int vbo;
+
+    private int prevVao;
+
+    public void init() {
+        ClientLifecycleEvents.CLIENT_STARTED.register(client -> {
+            vao = glGenVertexArrays();
+            vbo = glGenBuffers();
+        });
+    }
+
+    public static void bindBuffer() {
+        glBindBuffer(GL_ARRAY_BUFFER, vbo);
+    }
+
+    public static void unbindBuffer() {
+        glBindBuffer(GL_ARRAY_BUFFER, 0);
+    }
+
+    public static void writeBuffer(FloatBuffer buffer) {
+        glBufferData(GL_ARRAY_BUFFER, buffer, GL_STATIC_DRAW);
+    }
+
+    public static void draw(int drawMode, int verts) {
+        glDrawArrays(drawMode, 0, verts);
+    }
+
+    public static void bind() {
+        prevVao = glGetInteger(GL_VERTEX_ARRAY_BINDING);
+        glBindVertexArray(vao);
+    }
+
+    public static void unbind() {
+        glBindVertexArray(prevVao);
+    }
+}