加入渲染点的代码

app/android/java/com/khronos/vulkan_samples/MainActivity.java

@@ -18,11 +18,16 @@ import androidx.core.content.ContextCompat;
 
 import com.google.androidgamesdk.GameActivity;
 import com.google.common.util.concurrent.ListenableFuture;
+import com.google.mediapipe.tasks.components.containers.NormalizedLandmark;
 import com.google.mediapipe.tasks.vision.core.RunningMode;
+import com.google.mediapipe.tasks.vision.facelandmarker.FaceLandmarkerResult;
 
 import org.jetbrains.annotations.NotNull;
 
 import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.nio.FloatBuffer;
+import java.util.List;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
@@ -202,8 +207,46 @@ public class MainActivity extends GameActivity implements FaceLandmarkerHelper.L
         Log.e(TAG, "onError: Face Error");
     }
 
+    private ByteBuffer nativeBuffer = null;
+    float[] points = new float[480 * 3];
+
+
     @Override
     public void onResults(FaceLandmarkerHelper.@NotNull ResultBundle resultBundle) {
-        Log.e(TAG, "On Face Result");
+        FaceLandmarkerResult faceLandmarkerResult = resultBundle.getResult();
+        int height = resultBundle.getInputImageHeight();
+        int width = resultBundle.getInputImageWidth();
+        int bufferSize = 480 * 3 * 4;
+
+        if(nativeBuffer == null)
+        {
+            // 创建直接ByteBuffer（在native内存中）
+            nativeBuffer = ByteBuffer.allocateDirect(bufferSize);
+            nativeBuffer.order(ByteOrder.nativeOrder());
+        }
+
+
+        int index = 0;
+        // Iterate through each detected face
+        for (List<NormalizedLandmark> faceLandmarks : faceLandmarkerResult.faceLandmarks()) {
+            //should be 1
+
+            int arrayIndex = 0;
+            for (NormalizedLandmark p : faceLandmarks)
+            {
+                //Log.i(TAG, "Index" + index + " x:"+p.x() + " y:"+p.y() + " z:"+p.z());
+                points[arrayIndex++] = p.x();
+                points[arrayIndex++] = p.y();
+                points[arrayIndex++] = p.z();
+                index++;
+            }
+        }
+
+        // 转换为FloatBuffer并填充数据
+        FloatBuffer floatBuffer = nativeBuffer.asFloatBuffer();
+        floatBuffer.put(points);
+        floatBuffer.position(0);
+        passDataToNative(nativeBuffer, index, width, height);
     }
+    public native void passDataToNative(ByteBuffer buffer, int pointCount, int width, int height);
 }