in app/src/main/java/com/facebook/sample/rendering/SampleGLTFRenderer.java [164:181]
public void createOnGlThread(Context context, String glTFAssetName)
throws IOException {
shaderProgram = new ShaderProgram(
readAsset(context, "gltfobjectvert.glsl"),
readAsset(context, "gltfobjectfrag.glsl"));
GLES20.glUseProgram(shaderProgram.getShaderHandle());
modelViewProjectionUniform = shaderProgram.getUniform("u_ModelViewProjection");
positionAttribute = shaderProgram.getAttribute("a_Position");
Matrix.setIdentityM(modelMatrix, 0);
// Read the gltf file and create render objects.
InputStream gltfInput = context.getAssets().open(glTFAssetName);
SampleGLTFReader.GLTFScene gltfScene = SampleGLTFReader.read(gltfInput);
gltfRenderObjects = CreateGLTFRenderObjects(gltfScene);
}