package com.example.nk33785.project3;

import android.content.Context;
import android.opengl.GLSurfaceView;
import android.util.AttributeSet;
import android.view.MotionEvent;

public class Surface extends GLSurfaceView {

    //region Fields

    private final float TOUCH_SCALE_FACTOR = 180.0f/32000;

    public float r, g, b, a;
    private MyRenderer renderer;
    private float previousX, previousY;

    //endregion

    //region Properties

    public setNewRenderer(MyRenderer renderer) {
        this.renderer = renderer;
        setRenderer(this.renderer);
    }

    //endregion

    //region Constructor

    public Surface(Context context) {
        super(context);
        init();
    }

    public Surface(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    private void init() {
        setEGLContextClientVersion(2);
        setNewRenderer(new Renderer(1, 0, 0, 1));
        setRenderMode(GLSurfaceView.RENDERMODE_WHEN_DIRTY);
    }


    //endregion

    //region Methods

    @Override
    public boolean onTouchEvent(MotionEvent e) {
        float x = e.getX();
        float y = e.getY();

        switch (e.getAction()) {
            case MotionEvent.ACTION_MOVE:
                float dx = x - previousX;
                float dy = x - previousY;

                if (y > getHeight()/2)
                    dx *= -1;

                if (x < getWidth()/2)
                    dy *= -1;

                renderer.angle += (dx + dy) * TOUCH_SCALE_FACTOR;
                requestRender();
                break;
        }

        previousX = x;
        previousY = y;

        return true;
    }

    //endregion
}