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/* @test
@summary Test ModelStandardTransform transform method */
import com.sun.media.sound.ModelStandardTransform;
public class TransformLinear {
private static boolean checkLinearity(ModelStandardTransform transform)
{
double lastx = 0;
for (int p = 0; p < 2; p++)
for (int d = 0; d < 2; d++)
for (double i = 0; i < 1.0; i+=0.001) {
if(p == 0)
transform.setPolarity(ModelStandardTransform.POLARITY_UNIPOLAR);
else
transform.setPolarity(ModelStandardTransform.POLARITY_BIPOLAR);
if(d == 0)
transform.setDirection(ModelStandardTransform.DIRECTION_MIN2MAX);
else
transform.setDirection(ModelStandardTransform.DIRECTION_MAX2MIN);
double x = transform.transform(i);
if(i == 0)
lastx = x;
else
{
if(lastx - x > 0.2) return false;
lastx = x;
}
}
return true;
}
private static void assertTrue(boolean value) throws Exception
{
if(!value)
throw new RuntimeException("assertTrue fails!");
}
public static void main(String[] args) throws Exception {
ModelStandardTransform transform = new ModelStandardTransform();
transform.setTransform(ModelStandardTransform.TRANSFORM_LINEAR);
assertTrue(checkLinearity(transform));
transform.setDirection(ModelStandardTransform.DIRECTION_MIN2MAX);
transform.setPolarity(ModelStandardTransform.POLARITY_UNIPOLAR);
assertTrue(Math.abs(transform.transform(0.2f) - 0.2f) < 0.0001f);
assertTrue(Math.abs(transform.transform(0.8f) - 0.8f) < 0.0001f);
transform.setDirection(ModelStandardTransform.DIRECTION_MAX2MIN);
transform.setPolarity(ModelStandardTransform.POLARITY_UNIPOLAR);
assertTrue(Math.abs(transform.transform(0.2f) - 0.8f) < 0.0001f);
assertTrue(Math.abs(transform.transform(0.8f) - 0.2f) < 0.0001f);
transform.setDirection(ModelStandardTransform.DIRECTION_MIN2MAX);
transform.setPolarity(ModelStandardTransform.POLARITY_BIPOLAR);
assertTrue(Math.abs(transform.transform(0.2f) - (-0.6f)) < 0.0001f);
assertTrue(Math.abs(transform.transform(0.8f) - (0.6f)) < 0.0001f);
transform.setDirection(ModelStandardTransform.DIRECTION_MAX2MIN);
transform.setPolarity(ModelStandardTransform.POLARITY_BIPOLAR);
assertTrue(Math.abs(transform.transform(0.2f) - (0.6f)) < 0.0001f);
assertTrue(Math.abs(transform.transform(0.8f) - (-0.6f)) < 0.0001f);
}
}