void PerlinNoise2D::generateNoise()
{

	delete[]this->perlinNoise;
	this->perlinNoise = new float[width * height];

	for (int x = 0; x < width; ++x) {

		for (int y = 0; y < height; ++y) {

			float noise = 0.f;
			scale = 0.5f;
			float scaleAcc = 0.f;

			for (int o = 0; o < octave; ++o) {
				int pitchX = width >> o;
				int pitchY = height >> o;

				int sampleX1 = (x / pitchX) * pitchX;
				int sampleY1 = (y / pitchY) * pitchY;

				int sampleX2 = (sampleX1 + pitchX) % width;
				int sampleY2 = (sampleY1 + pitchY) % height;

				float blendX = (float)(x - sampleX1) / (float)pitchX;
				float blendY = (float)(y - sampleY1) / (float)pitchY;

				float sampleT = (1.f - blendX) * noiseSeed[sampleY1 * width + sampleX1] + blendX * noiseSeed[sampleY1 * width + sampleX2];
				float sampleB = (1.f - blendY) * noiseSeed[sampleY2 * width + sampleX1] + blendY * noiseSeed[sampleY2 * width + sampleX2];


				noise += ((blendY * blendX) * (sampleB - sampleT) + sampleT) * scale;
				scaleAcc += scale;
				scale = scale / scalingBias;


			}
			//std::cout << noise / scaleAcc << std::endl;
			perlinNoise[y * width + x] = noise / scaleAcc;
		}

	}
}

void PerlinNoise2D::generateNoiseToImage(sf::Image &image)
{
	for (int x = 0; x < image.getSize().x; ++x) {
		for (int y = 0; y < image.getSize().y; ++y) {
			image.setPixel((unsigned)x, (unsigned)y, sf::Color::White);
		}
	}

	for (int x = 0; x < width; ++x) {
		for (int y = 0; y < height; ++y) {

			float value = perlinNoise[y * width + x];

			if (value > 0.8f) {
				image.setPixel((unsigned)x, (unsigned)y, sf::Color::Color(11,39,255,255));
			}
			else if (value > 0.6f && value < 0.8f) {
				image.setPixel((unsigned)x, (unsigned)y, sf::Color::Color(120,171,255,255));
			}
			else if(value > 0.4f && value < 0.6f) {
				image.setPixel((unsigned)x, (unsigned)y, sf::Color::Yellow);
			}
			else if(value > 0.2f && value < 0.4f) {
				image.setPixel((unsigned)x, (unsigned)y, sf::Color::Color(19,255,38,255));
			}
			else if (value > 0.f && value < 0.2f) {
				image.setPixel((unsigned)x, (unsigned)y, sf::Color::Color(12, 238, 7, 255));
			}
		}
	}
}