DrawSegment not working on xcode

[ramyas1609]

#include "DrawingCanvas.h"
using namespace cocos2d;
bool DrawingCanvas::init()
{
    if(!Node :: init())
    {
        return false;
    }
    drawnode = DrawNode::create();
    this->addChild(drawnode);
    background = LayerColor::create(Color4B(255,255,255,255));
    this->addChild(background);
    return true;
}
void DrawingCanvas::onEnter()
{
    Node::onEnter();
    Size visible = CCDirector::getInstance()->getVisibleSize();
    this->setContentSize(visible);
    drawnode->setContentSize(visible);
    setupTouchHandling();
}
void DrawingCanvas::setupTouchHandling()
{
    static Vec2 lastTouchPos,touchPos;
    auto touchListener = EventListenerTouchOneByOne::create();
    touchListener->onTouchBegan = [&](Touch* touch, Event* event)
    {
        lastTouchPos = drawnode->convertTouchToNodeSpace(touch);
        lastTouchPos = touchPos;
        CCLOG("last %f %f\n",lastTouchPos.x,lastTouchPos.y);
        return true;
    };
    touchListener->onTouchMoved = [&](Touch* touch, Event* event)
    {
        touchPos = drawnode->convertTouchToNodeSpace(touch);
        CCLOG("now %f %f\n",touchPos.x,touchPos.y);
        drawnode->drawSegment(lastTouchPos, touchPos, 4.0f*CC_CONTENT_SCALE_FACTOR(), Color4F(0.0f, 0.0f, 0.0f, 1.0f));
    };
    this->getEventDispatcher()->addEventListenerWithSceneGraphPriority(touchListener, this);
}

Hey, the drawsegment call dosent seem to work . I also tried using just 4.0f as radius parameter.

[soggybag]

Cocos 2d is not supported any more. You should try one of the recent Swift tutorials.

[ramyas1609]

But the rest of the code works for cocos2dx. I am able to see a white screen in the simulator as well log the lasttouchpos and touchpos positions in the console

[soggybag]

I'm not sure what the problem is. This tutorial is 2 years old, Xcode is up to version 8.2! We have been updating tutorials to work with SpriteKit which is Apple's game native game framework.

[danielhaaser]

@soggybag this is a C++ Cocos2d-x tutorial

[danielhaaser]

@JunkyardPotato I need more information. What kind of error output do you see from the drawSegment call?

[soggybag]

I haven't seen this before. I wasn't sure Cocos2d was still supported.

[danielhaaser]

@soggybag It's a C++ fork of Cocos2d called Cocos2d-x, it's still maintained and very popular for making cross platform mobile games. You can learn more at http://cocos2d-x.org/

I made three tutorials for the 2015 summer academy. The tutorials aren't especially maintained, but they seem to still work with some tweaks.

[ramyas1609]

@djh- There is no error as such. I am able to run the executable in the simulator and the CCLOG prints the lasttouchpos and touchpos but there is no line seen on the screen when i move the mouse over the canvas. There should be a black color line drawn between the points lasttouchpos and touchpos as a result of the call to drawsegment

[danielhaaser]

@JunkyardPotato Hmm unfortunately I no longer have a dev environment set up for these tutorials, so I may not be super helpful.

Can you check this line to see that the drawnode is getting a valid contentSize? Maybe it's getting set to 0 for some reason? Also can you check the position of the drawnode too?

drawnode->setContentSize(visible);