private void onVSync()

in app/src/main/java/com/facebook/sample/SampleGLTFView.java [152:168]


        private void onVSync() {
            if (!eglRenderTarget.hasValidContext()) {
                return;
            }

            Choreographer.getInstance().postFrameCallback(frameCallback);

            eglRenderTarget.makeCurrent();
            GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);

            updateCamera();
            gltfObject.updateModelMatrix(modelMatrix, SCALE_FACTOR * aspectRatio);

            gltfObject.draw(viewMatrix, projectionMatrix);

            eglRenderTarget.swapBuffers();
        }