paysages3d/src/tests/NoiseGenerator_Test.cpp

#include "BaseTestCase.h"

#include "NoiseGenerator.h"

TEST(NoiseGenerator, getRange) {
    NoiseGenerator *noise;
    double minvalue, maxvalue;

    noise = new NoiseGenerator();

    noise->addLevelSimple(0.1, -1.0, 1.0);
    noise->addLevelSimple(0.2, -0.5, 0.2);
    noise->addLevelSimple(0.4, -0.3, 1.2);
    noise->validate();
    noise->getRange(&minvalue, &maxvalue);

    EXPECT_DOUBLE_EQ(minvalue, -1.8);
    EXPECT_DOUBLE_EQ(maxvalue, 2.4);

    delete noise;
}

TEST(NoiseGenerator, normalizeAmplitude) {
    int x;
    NoiseGenerator *noise;

    noise = new NoiseGenerator();

    /* Symmetric case */
    noise->addLevelsSimple(10, 1.0, -4.0, 4.0, 0.5);
    noise->validate();
    noise->normalizeAmplitude(-1.0, 1.0, 0);
    for (x = 0; x < 1000; x++) {
        double value = noise->get1DTotal(0.01 * (double)x);
        ASSERT_DOUBLE_IN_RANGE(value, -1.0, 1.0);
    }

    /* Target center differs from current center */
    noise->clearLevels();
    noise->addLevelsSimple(10, 1.0, -5.0, 5.0, 0.5);
    noise->validate();
    noise->normalizeAmplitude(0.0, 1.0, 0);
    for (x = 0; x < 1000; x++) {
        double value = noise->get1DTotal(0.01 * (double)x);
        ASSERT_DOUBLE_IN_RANGE(value, 0.0, 1.0);
    }

    /* Asymmetric range */
    noise->clearLevels();
    noise->addLevelsSimple(10, 1.0, 0.0, 10.0, 0.0);
    noise->validate();
    noise->normalizeAmplitude(0.0, 1.0, 0);
    for (x = 0; x < 1000; x++) {
        double value = noise->get1DTotal(0.01 * (double)x);
        ASSERT_DOUBLE_IN_RANGE(value, 0.0, 1.0);
    }

    /* Complex asymmetric case */
    noise->clearLevels();
    noise->addLevelsSimple(3, 1.0, -2.0, 8.0, 0.3);
    noise->validate();
    noise->normalizeAmplitude(-2.0, 4.0, 0.0);
    for (x = 0; x < 1000; x++) {
        double value = noise->get1DTotal(0.01 * (double)x);
        ASSERT_DOUBLE_IN_RANGE(value, -2.0, 4.0);
    }

    delete noise;
}