Messages

16

Graphics / Re: Blur WITHOUT shader

« on: May 16, 2023, 04:05:30 pm »

Oh yes I didn't think about that !
Thank you for the little example I am going to try this 

17

Graphics / Re: Blur WITHOUT shader

« on: May 14, 2023, 08:14:00 pm »

Yes gaussian blur is the kind of result I would like, box blur could give also good result
Sorry to re-open the topic on the handle of shader with android, but can I wait for it or I really need to find another slotution with that ?

18

Graphics / Blur WITHOUT shader

« on: May 14, 2023, 04:11:54 pm »

Hello,
What is the best and efficient way to apply gaussian blur without shaders ? (because I want to play on android later)
Is drawing on RenderTexture and CPU compute blur the best way ? It seems too expensive to me
Thank you

19

Graphics / Re: Alternative of shaders on Android

« on: September 08, 2022, 05:54:48 pm »

Thank you for mentioning that, if others have a similar question I did that that way (first use of blendmode, could be better I suppose):

Mask are full alpha by defaut and color where I want to put material (see attachement)

(click to show/hide)

    struct Layer{
        std::shared_ptr<sf::Texture> textureMask;
        std::shared_ptr<sf::Texture> textureLayer;
    };

    .....
    in function draw() of my tileMap class:

    //draw grass default
    states.texture = m_textureGrass.get();
    target.draw(m_verticesLayer, states);

    for(auto &l:m_listLayer){
        states.texture = l.textureMask.get();
        states.blendMode = sf::BlendMode(BlendMode::Zero, BlendMode::One, BlendMode::Add,
                                         BlendMode::Zero, BlendMode::OneMinusSrcAlpha, BlendMode::ReverseSubtract);
        target.draw(m_verticesMask, states);


        states.texture = l.textureLayer.get();
        states.blendMode =  sf::BlendMode(BlendMode::OneMinusDstAlpha,BlendMode::DstAlpha,BlendMode::Add,
                                         BlendMode::One, BlendMode::Zero, BlendMode::Add);
        target.draw(m_verticesLayer, states);
    }

20

Window / Re: MouseWheelEvent with Trackpad, delta = 0 ?

« on: August 22, 2022, 01:06:31 pm »

My bad I didn't see
solved thank you very much c:

21

Window / Re: MouseWheelEvent with Trackpad, delta = 0 ?

« on: August 22, 2022, 09:49:46 am »

1. Well spotted, I didnt try horizontal scrolling, with my trackpad it doesnt trigger the MouseWheelEvent event

2. I simply printed out the delta attribute of sf::Event::MouseWheelEvent Struct (https://www.sfml-dev.org/documentation/2.5.1-fr/structsf_1_1Event_1_1MouseWheelEvent.php), indeed it's a int. Where did you get from the float value ?

22

Window / MouseWheelEvent with Trackpad, delta = 0 ?

« on: August 20, 2022, 11:59:01 pm »

Hello everyone,

I'm using SFML on Windows 10 with my laptop and I use a trackpad to move my mouse.

When it comes to MouseWheelEvent (sliding two fingers on the trackpad), the delta member is most of the time 0 which is quite disturbing for me.
Btw if I slide quickly, the delta is about +-5 and there is an inertie towards 0 (I assume it's device/system dependent) and I'm ok with that.

Edit: I noticed when you zoom with trackpad (two fingers get closer) it triggers MouseWheelEvent with a decent delta as expected. The issue is really focused on sliding two fingers (up/down) on the trackpad

Why the delta stays at 0 if the user inputs natural movement ? How can I handle it ?

Thank you

23

Graphics / Alternative of shaders on Android

« on: July 24, 2022, 10:36:59 am »

Hello everyone,

I want to bring my sfml app on Android and I'm using a little shader to blend textures from multiple mask images (black and white, ex img: maskStone512x.png) into a VertexArray on my tilemap object (can see result with img: result.PNG).
I don't want to have a texture per tile but I want a smooth background. That's why I did it this way.

If I'm right, on Android, I can't use my personal shader because of gl es 2.0 which is not supported by sfml currently. 

I need to find an alternative to this utilisation.

Actually, the tilemap texture is not changing afterwards so I thought a simple sprite/texture could be ok after the generation and transmission of the texture by the server. If I do this way, is there a maximum size of sprite/texture I should not exceed to keep a good performance on android ? Should I split the tilemap in different zone to control their draw matching the size and pos of the view ? If so what size each part ?

If you have another idea to workaround

Thank you very much for your help