package wordcram;

import processing.core.*;

public class WaveWordPlacer implements WordPlacer {

    @Override
    public PVector place(Word word, int wordIndex, int wordsCount,
            int wordImageWidth, int wordImageHeight, int fieldWidth,
            int fieldHeight) {

        float normalizedIndex = (float) wordIndex / wordsCount;
        float x = normalizedIndex * fieldWidth;
        float y = normalizedIndex * fieldHeight;

        float yOffset = getYOffset(wordIndex, wordsCount, fieldHeight);
        return new PVector(x, y + yOffset);
    }

    private float getYOffset(int wordIndex, int wordsCount, int fieldHeight) {
        float theta = PApplet.map(wordIndex, 0, wordsCount, PConstants.PI, -PConstants.PI);

        return (float) Math.sin(theta) * (fieldHeight / 3f);
    }
}