// on "init" you need to initialize your instance

bool HelloWorld::init()

{

    //////////////////////////////

    // 1. super init first

    if ( !Layer::init() )

    {

        return false;

    }

    Size visibleSize = Director::getInstance()->getVisibleSize();

    Vec2 origin = Director::getInstance()->getVisibleOrigin();

    auto sp = Sprite::create("water.png", Rect(0,0, visibleSize.width, visibleSize.height));

    addChild(sp);

    sp->setPosition(Point(visibleSize/2));

    auto TexCache = Director::getInstance()->getTextureCache();

    auto wave2 = TexCache->addImage("wave1.png");

    auto wave1 = TexCache->addImage("18.jpg");

    wave1->setTexParameters(Texture2D::TexParams{GL_LINEAR, GL_LINEAR, GL_REPEAT, GL_REPEAT});

    wave2->setTexParameters(Texture2D::TexParams{GL_LINEAR, GL_LINEAR, GL_REPEAT, GL_REPEAT});

    auto glprogram = GLProgram::createWithFilenames("water.vsh", "water.fsh");

    auto glprogramstate = GLProgramState::getOrCreateWithGLProgram(glprogram);

    sp->setGLProgramState(glprogramstate);

    glprogramstate->setUniformTexture("u_wave1", wave1);

    glprogramstate->setUniformTexture("u_wave2", wave2);

    glprogramstate->setUniformFloat("saturateValue", 1.2);

    sp->setRotation3D(Vec3(-60,0,0));

    return true;

}

#ifdef GL_ES

precision mediump float;

#endif

varying vec4 v_fragmentColor;

varying vec2 v_texCoord;

uniform sampler2D u_wave1;

uniform sampler2D u_wave2;

uniform float u_interpolate;

uniform float saturateValue;

float verticalSpeed = 0.3797;

float horizontalSpeed = 0.77;

void main() {

    vec2 textCoord1 = v_texCoord;

    textCoord1.x += verticalSpeed * CC_Time.x;

    textCoord1.y += horizontalSpeed * CC_Time.x;

    vec3 color = texture2D(u_wave1, textCoord1).xyz;

    color += texture2D(u_wave2, v_texCoord).xyz;

    if(color.x > saturateValue)

        color = vec3(1.0);

    else

        color = texture2D(CC_Texture0, v_texCoord).xyz;

    gl_FragColor = vec4(color, 1.0);

}