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  1. PO
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    <p>A couple things:</p> <p>1- I find out that your .rs file cannot have the same name as your .java file</p> <p>2- you declared a output variable on your root function (*v_out) but never compute it inside the function.</p> <p>3- Your java arrays are all ints. From the power function declaration on the <a href="http://developer.android.com/reference/renderscript/rs__cl_8rsh.html#a9243de1d67fcc847a89f95748d664b19" rel="nofollow">Renderscript API</a>, they all take at least a float as input</p> <p>Here is my java code:</p> <pre><code> public class Sum extends Activity { private float[] input; private float[] output; private RenderScript mRS; private Allocation mInAllocation; private Allocation mOutAllocation; private TextView t1; private ScriptC_Square mScript; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_sum); t1= new TextView(this); t1= (TextView)findViewById(R.id.textview1); input= new float[4]; input[0]=0; input[1]=1; input[2]=2; input[3]=3; output =new float[input.length]; createScript(); } private void createScript() { mRS = RenderScript.create(this); mInAllocation = Allocation.createSized(mRS, Element.F32(mRS),4); mOutAllocation = Allocation.createTyped(mRS,mInAllocation.getType()); mScript = new ScriptC_Square(mRS, getResources(), R.raw.square); mInAllocation.copyFrom(input); mScript.forEach_root(mInAllocation, mOutAllocation); // calls the forEach function to operate on the root function (each allocation input, will have a corresponding allocation output mOutAllocation.copyTo(output); // copy the result that was stored in mOutAllocation into the array output t1.setText(String.format("Input:%s\n\noutput:%s", ArrayToString(input), ArrayToString(output))); } /** * this function just print each element of a primitive float array into a text string * @param array * @return */ public String ArrayToString(float[] array){ String s=""; for(int i=0; i&lt;array.length; i++){ s+= String.format("\nValue %d: %f", i, array[i]); } return s; } } </code></pre> <p>Here is my Square.rs file:</p> <pre><code>#pragma version(1) #pragma rs java_package_name(com.example.sum)//don't forget to change that package name void root(const float *v_in, float *v_out ){ *v_out = pow(*v_in, 2); //use the internal pow function of Renderscript pow(float x, float y) = x ^y; } </code></pre>
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    1. POData transfer between rs and android?
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    1. USjlarrieux
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      1. VTUpMod
    1. COIf you want to keep using int instead of float, you can just do "return *v_in * *v_in;". In your code above, you would also want to switch to 2.f instead of just 2, since that would imply a double->float conversion (one of the worse aspects of the C99 language).
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      1. USStephen Hines
 

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