How to use DynamicLight?

[ttohin]

I didn't find examples how to use avalon::graphics::DynamicLight and I created empty project with HelloWorld::init method like this. So, I don't see dynamic lighting and/or shadows from sprite baba.png

bool HelloWorld::init()
{
  if ( !Layer::init() )
  {
    return false;
  }
  Size visibleSize = Director::getInstance()->getVisibleSize();
  Vec2 origin = Director::getInstance()->getVisibleOrigin();

  auto bg = Sprite::create("HelloWorld.png");

  // position the sprite on the center of the screen
  bg->setPosition(Vec2(visibleSize.width/2 + origin.x, visibleSize.height/2 + origin.y));
  bg->setScale(2, 2);

  // add the sprite as a child to this layer
  this->addChild(bg);

  auto baba = Sprite::create("baba.png");
  baba->cocos2d::Node::setPosition({visibleSize.width/2, visibleSize.height/2});
  this->addChild(baba);

  auto dynamicLight = avalon::graphics::DynamicLight::create();
  dynamicLight->debugDrawEnabled = true;
  dynamicLight->setShadowCasters(*baba);
  dynamicLight->setPosition({visibleSize.width/2 + 40, visibleSize.height/2});
  this->addChild(dynamicLight);

  return true;
}

Main question is. What do I wrong?

And another ones about signature of method:

void DynamicLight::setShadowCasters(Node& casters) 

Why casters is reference? Do we really need in copying here? And why casters are plural (may be list of Nodes expected here)?

[namkazt]

Have same problems here!

[namkazt]

just need to fix alot to make it runable, the most important is need to use GLProgramState to pass variables. and it seem like DynamicLight not create draw command.

[redstair]

Can't get it to work either. How did you fix it? Can you please post your code? Thank you very much in advance!

[namkazt]

here is my own code to make it work ( it's really dirty ) In HelloWorld.h

    cocos2d::Sprite* shadowCasters;
    cocos2d::RenderTexture* occlusionMap;
    cocos2d::RenderTexture* shadowMap1D;
    cocos2d::RenderTexture* finalShadowMap;
    cocos2d::GLProgramState* smss;
    cocos2d::GLProgramState* srss;
    cocos2d::Sprite* fsm;
    cocos2d::Point lightPos;

In HelloWorld.cpp ( init function )

    int lightSize = 1000;
    lightPos = Point(visibleSize.width / 2, visibleSize.height / 2);

    GLProgram* shadowMapShader = this->loadShader("shader/pass.vsh", "shader/shadowMap.fsh");
    GLProgram* shadowRenderShader = this->loadShader("shader/pass.vsh", "shader/shadowRender.fsh");

    shadowCasters = Sprite::create("test.png");
    shadowCasters->setPosition(visibleSize.width / 2, visibleSize.height / 2);
    shadowCasters->retain();
    this->addChild(shadowCasters, 200);

    occlusionMap = RenderTexture::create(lightSize, lightSize);
    //occlusionMap->setPosition(visibleSize.width / 2, visibleSize.height / 2);
    occlusionMap->retain();
    shadowMap1D = RenderTexture::create(lightSize, 16);
    //shadowMap1D->setPosition(visibleSize.width / 2, visibleSize.height / 2);
    shadowMap1D->retain();
    finalShadowMap = RenderTexture::create(lightSize, lightSize);
    //finalShadowMap->setPosition(visibleSize.width / 2, visibleSize.height / 2);
    finalShadowMap->retain();

    smss = GLProgramState::getOrCreateWithGLProgram(shadowMapShader);
    smss->setUniformVec2("resolution", Vec2(lightSize, lightSize));
    smss->setUniformFloat("upScale", 1.0);
    smss->setUniformFloat("accuracy", 1.0);

    srss = GLProgramState::getOrCreateWithGLProgram(shadowRenderShader);
    srss->setUniformVec2("resolution", Vec2(lightSize, lightSize));
    srss->setUniformFloat("softShadows", true ? 1.0f : 0.0f);

    Point p1 = shadowCasters->getAnchorPoint();
    Point p2 = shadowCasters->getPosition();
    // Render light region to occluder FBO
    occlusionMap->beginWithClear(0.0, 0.0, 0.0, 0.0);
    //shadowCasters->setAnchorPoint({ 0, 0 });
    //shadowCasters->setPosition({ x, y });
    shadowCasters->visit();
    occlusionMap->end();
    shadowCasters->setAnchorPoint(p1);
    shadowCasters->setPosition(p2);

    // Build a 1D shadow map from occlude FBO

    Sprite* ocM = Sprite::createWithTexture(occlusionMap->getSprite()->getTexture());
    //ocM->setPosition(visibleSize.width / 2, visibleSize.height / 2);
    smss->setUniformTexture("u_texture", ocM->getTexture());
    ocM->setGLProgramState(smss);
    ocM->retain();

    shadowMap1D->beginWithClear(0.0, 0.0, 0.0, 0.0);
    ocM->setAnchorPoint({ 0.5, 0.5 });
    ocM->setPosition({ static_cast<float>(lightSize / 2.0), static_cast<float>(lightSize / 2.0) });
    ocM->visit();
    shadowMap1D->end();

    Sprite* sM1d = Sprite::createWithTexture(shadowMap1D->getSprite()->getTexture());
    //sM1d->setPosition(visibleSize.width / 2, visibleSize.height / 2);
    sM1d->retain();

    srss->setUniformTexture("u_texture", ocM->getTexture());
    srss->setUniformTexture("u_texture2", sM1d->getTexture());

    fsm = Sprite::createWithTexture(finalShadowMap->getSprite()->getTexture());
    fsm->setPosition(visibleSize.width / 2 + (lightSize - visibleSize.width) / 2, visibleSize.height / 2 + (lightSize - visibleSize.height) / 2);
    fsm->setColor({ 255, 255, 255 });
    fsm->setGLProgramState(srss);
    fsm->retain();
    fsm->setScaleY(-1);
    fsm->setBlendFunc({ GL_AMBIENT_AND_DIFFUSE, GL_ONE });
    this->addChild(fsm, 201);

here is load shader function ( from old code )

GLProgram* HelloWorld::loadShader(const GLchar* vertexShader, const GLchar* fragmentShader)
{
    auto shader = ShaderCache::getInstance()->getGLProgram(fragmentShader);
    if (!shader) {
        shader = new GLProgram();
        shader->retain();
        shader->initWithVertexShaderFilename(vertexShader, fragmentShader);
        shader->bindAttribLocation(GLProgram::ATTRIBUTE_NAME_POSITION, GLProgram::VERTEX_ATTRIB_POSITION);
        shader->bindAttribLocation(GLProgram::ATTRIBUTE_NAME_TEX_COORD, GLProgram::VERTEX_ATTRIB_TEX_COORDS);
        shader->bindAttribLocation(GLProgram::ATTRIBUTE_NAME_COLOR, GLProgram::VERTEX_ATTRIB_COLOR);
        shader->link();
        shader->updateUniforms();
        shader->use();
    }

    return shader;
}

[namkazt]

as i see many guys want to get this source so i create new repository. Check it out at here : https://github.com/namkazt/NewDynamicLight.

[Borisas]

Getting openGL errors when running your test with cocos2d-x 3.4