test worked

src/main/java/com/replaymod/render/capturer/RealLensCameraContext.java

@@ -0,0 +1,21 @@
+package com.replaymod.render.capturer;
+
+public final class RealLensCameraContext {
+
+    private static final ThreadLocal<RealLensOpenGlFrameCapturer.Data> CURRENT =
+            new ThreadLocal<>();
+
+    private RealLensCameraContext() {}
+
+    public static void set(RealLensOpenGlFrameCapturer.Data data) {
+        CURRENT.set(data);
+    }
+
+    public static RealLensOpenGlFrameCapturer.Data get() {
+        return CURRENT.get();
+    }
+
+    public static void clear() {
+        CURRENT.remove();
+    }
+}

src/main/java/com/replaymod/render/capturer/RealLensOpenGlFrameCapturer.java

@@ -0,0 +1,70 @@
+package com.replaymod.render.capturer;
+
+import com.replaymod.render.frame.OpenGlFrame;
+import com.replaymod.render.frame.RealLensOpenGlFrame;
+import com.replaymod.render.rendering.Channel;
+
+import java.util.Collections;
+import java.util.Map;
+
+public class RealLensOpenGlFrameCapturer
+        extends OpenGlFrameCapturer<RealLensOpenGlFrame, RealLensOpenGlFrameCapturer.Data> {
+
+    public static class Data implements CaptureData {
+
+        public final float dx, dy, dz;
+        public final float yaw, pitch;
+
+        public Data(float dx, float dy, float dz,
+                    float yaw, float pitch) {
+            this.dx = dx;
+            this.dy = dy;
+            this.dz = dz;
+            this.yaw = yaw;
+            this.pitch = pitch;
+        }
+    }
+
+    private static final Data[] CAMERAS = {
+            new Data( 0.25f,  0.00f, 0f, 0f, 0f),
+            new Data( 0.00f,  0.25f, 0f, 0f, 0f),
+            new Data(-0.25f,  0.00f, 0f, 0f, 0f),
+            new Data( 0.00f, -0.25f, 0f, 0f, 0f)
+    };
+
+    public RealLensOpenGlFrameCapturer(
+            WorldRenderer worldRenderer,
+            RenderInfo renderInfo
+    ) {
+        super(worldRenderer, renderInfo);
+    }
+
+    @Override
+    public Map<Channel, RealLensOpenGlFrame> process() {
+
+        float partialTicks = renderInfo.updateForNextFrame();
+        int frameId = framesDone++;
+
+        OpenGlFrame[] frames = new OpenGlFrame[CAMERAS.length];
+
+        try {
+            for (int i = 0; i < CAMERAS.length; i++) {
+
+                RealLensCameraContext.set(CAMERAS[i]);
+
+                frames[i] = renderFrame(
+                        frameId,
+                        partialTicks,
+                        CAMERAS[i]
+                );
+            }
+        } finally {
+            RealLensCameraContext.clear();
+        }
+
+        return Collections.singletonMap(
+                Channel.BRGA,
+                new RealLensOpenGlFrame(frames)
+        );
+    }
+}