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1

Graphics / BlendMode and RenderTexture not updating

« on: March 17, 2016, 09:49:44 am »

Hello, trying to get additive blendmode to work with a lighting system.

Which works of course. Problem for me however, lights will always be "on top" of the screen at all times.

So if I use two framebuffers by adding all lights, then blocking lights to the first, then drawing it to the second buffer, I can achieve my affect.

Which works, except I get this glitch/artifact?


My best explanation, its like the scene isn't clearing when I call .clear(); Even though I clearly am.
If none of the lights move, it works.

Min. working code example:

(click to show/hide)

#include <SFML/Graphics.hpp>

int main() {
        sf::RenderWindow window(sf::VideoMode(1280,720), "Moon", sf::Style::Default);
    window.setFramerateLimit(60);

    sf::RenderTexture drawBuffer;
    sf::Sprite buffer;

    sf::RenderTexture drawBuffer2;
    sf::Sprite buffer2;

    ///Lights
    sf::Texture lightSheet;

    sf::Sprite light;

    lightSheet.loadFromFile("lights.png");
    light.setTexture(lightSheet);
    light.setTextureRect({0,0,300,300});

    drawBuffer.create(1280,720);
    buffer.setTexture(drawBuffer.getTexture());

    drawBuffer2.create(1280,720);
    buffer2.setTexture(drawBuffer2.getTexture());

    buffer2.setColor(sf::Color(80,50,50));

    sf::Vector2u mouse;

        while( window.isOpen() ) {
                sf::Event event;
                while( window.pollEvent( event ) ) {
            if (event.type == sf::Event::Closed) { window.close(); }

            if (event.type == sf::Event::MouseMoved) {
                mouse = {event.mouseMove.x, event.mouseMove.y};
            }
                }

        window.clear(sf::Color::Green);

        ///Draw game scene/map/entities/objects here
        ///....
        ///....

        ///Draw Lights here

        ///Clear renderTextures
        drawBuffer.clear(sf::Color(0,0,0));

        ///For each Light, draw with additive blendmode
        light.setPosition(mouse.x,mouse.y);
        drawBuffer.draw(light, sf::BlendMode::BlendAdd);

        ///For each blocking light, simply draw the sprite
        //drawBuffer.draw(light);

        ///Draw the first framebuffer
        drawBuffer.display(); ///y u flip y axis

        ///Clear framebuffer
        drawBuffer2.clear(sf::Color(50,50,50));

        ///Draw the light sprite to the second framebuffer
        drawBuffer2.draw(buffer, sf::BlendMode::BlendAdd);

        drawBuffer2.display(); ///flip flip

        ///Finally, draw the finished frame to the main window, using BlendMultiply so it overlays onto the main scene.
        window.draw(buffer2, sf::BlendMode::BlendMultiply);

        window.display();
        }

        return 0;
}

 

If I add a rectangleshape with black, and draw it after .clear, it works. But it defeats the whole purpose of clear and also breaks my light blocking sprites.

Anyone know why this is happening? Spent too much time on something so trivial. Don't really want to settle for static lights either.
Thanks.

2

SFML projects / Muffin World v2 [Platformer] [WIP]

« on: February 20, 2016, 07:12:16 pm »

Muffin World v2
Muffins not included.

Description:

Started about two months ago for the level creator. My first version Muffin World (also sfml 1.6) never had one. As you can imagine I went through tedious job lining my mouse up with the world, copying the x/y then writing it manually in the tile file.

I decided to go with a freeform placement, like 3D. No grids and no tiles. This presented many challenges but I overcame them.

I created the editor first, in a wysiwyg approach. Built directly into my game engine. Instead of writing two programs, If I place an object at x/y, I know and will see how it will be exactly if the level was being played.

Although I've only had a short while on the editor, I wrote from scratch many 'sub-systems' over the years between SFML 1.6 and 2.2, which of coarse made making this easier then ever.

I've also overhauled the graphical assets, which are now %100 mine. I'm aiming for more animated and lively art, then static.

Along with that, comes HD viewing. I made my 1.6 game, with 800x600 screen space in mind...my laptop wasn't very good. Not a pretty sight resizing the window to 1080p which kept the view at 800p and distorted.
Now, if you play @ 1080p, renders clean crisp 1080p. Or any resolution you set.

The Plan:

A platformer, movable platforms (Which I've never done before), networking for co-op for someone online, small puzzles, enemies, npc's you can buy weapons from and attack monsters. Lots of secreats.

Tech Side:

Using only SFML, otherwise everything written from scratch in C++

Screenshots:
http://i.imgur.com/WlKeJbR.jpg

Gfy: https://gfycat.com/BreakableConstantDragonfly
https://gfycat.com/GoodnaturedMerryKitten
https://gfycat.com/FirmWatchfulGoldeneye

New:

Water: http://i.imgur.com/MbWupoC.gif
Switches: http://i.imgur.com/R2ucFxP.gif

Youtube:

Preview of the level:
http://www.youtube.com/watch?v=XI3kf2kQjXk

Preview of player collisions:
http://www.youtube.com/watch?v=ytatnEWwQDg

Menu Preview: https://www.youtube.com/watch?v=bs0rfYTWbc0
Entities Preview: https://www.youtube.com/watch?v=VBOVVUpC2GE


Thank you for checking out my wip project

3

SFML projects / Tower Defense

« on: April 15, 2015, 08:47:26 pm »

Tower Defense.

Hello, this is my wip game using SFML. Using C++;

>How are you using sfml?

Everything. Input, window system, network packets, graphical sprites, music and sounds.

>Detailed description

(click to show/hide)

A tower defense, in which you place towers to defend against on-coming enemies.
In this case, they are tanks, jeeps, planes, helicopters, etc..

The 'twist' sort of, to this is that, the enemies can also return fire on your own towers.
Meaning you have to not only defend, but repair and rebuild if you lose any towers.

Each unit and tower can be upgraded pretty much unlimited. Health, firepower, firing speed, and viewing range.
However each upgrade raises the base cost, making it more expensive each time.

Although the enemies don't have an exit to leave from, your health is actually your main buildings,
as the enemies will try to destroy them. That is this games version of a game over.
Failing to destroy any unit, they will continue to drive around and harass your buildings.

>Other Info

(click to show/hide)

I always wanted to make a tower defense. I had no other ideas other then using squares as enemies, I thought I'd do red alert since there wasn't much of it and I felt like making graphics for tanks/turrets.
Plus I love the tesla coil and this has it. yea. I also thought it'd be an easy 3-4 days of work to make it. Nope. This dragged on way longer then I thought.

All graphical assets, menu, tanks, logos etc.. have been created by me. Except for the sfml logo.
I tried my best, I'm no photoshopper, so don't expect fancyness.
The programming and other code assets have all been created by me except for:
https://github.com/SFML/SFML/wiki/Source:-Simple-Collision-Detection-for-SFML-2

I'm still a beginner so expect bugs and such. I do however try my best to polish my games however this ones abit of a mess.

As of right now you can only play one map, and it has 10 waves. and its extremely unbalanced.

>Controls

Mouse to select buttons, WASD to move the camera. Select a unit on the sidebar, simply click to place it anywhere. Holding before clicking allows you to rotate the unit first.
Click a unit to select it, then you can see its fov, and status on the sidebar, where you can upgrade/repair(not done) etc..

Screenshots:

http://i.imgur.com/8NJaOxu.jpg
http://i.imgur.com/c2EfVjW.jpg
http://i.imgur.com/rI9E1Ci.jpg
http://i.imgur.com/dTjMZ34.jpg



>Demos

http://www.mediafire.com/download/cz18g0u7pqjs9lc/TD+RA2.zip (22 MB)
sfmluploads......... (nullptr)

Thanks for checking this out. More features prolly on the way hopefully perhaps maybe.

4

SFML projects / Muffin World

« on: May 21, 2013, 08:59:24 pm »

Well since 2.0 has been 'officially' released, I might as well show off my old project I've been working on for 2 years now.
Its 1.6 so don't hate

Muffin World Yea not original nor does it really have anything to do with muffins.
It's a 2D sidescroller, with ground and spikes and monsters and such. Or so I hope in the future of this.

So far there's only one level, but it has multiple parts and took quite some time to make. Mainly because I'm a single dude working on both the code and the graphics.
And this project only keeps getting bigger (I think its like 10,000 lines or so)

Some screenshots (Click the thumbnail to enlarge):






Fun little fact: This is my first game...because, well when your new you just want to jump into game programming and make games, despite nearly all the tutorials saying

"Don't rush, start out slow with a pong clone or something".
Meanwhile, after many trys and fails, different versions of Muffin World, and using SDL, I've switched to SFML and still continue my struggle on creating this large complex game with little experience

DL Link (30MB):

• http://www.mediafire.com/download/zuj4ft0v35f7x7r/Muffin_World.7z
• http://www.sendspace.com/file/swlldl
• https://legacy.sfmluploads.org/file/177

To be frank I've lost quite a bit of interest in this, mainly from lack of direction and the fact that each levels needs graphics and I'm a terrible graphics person :/
Oh and I find SFML far easier to work with then SDL.

5

Window / Window Transparency

« on: December 26, 2011, 08:51:38 am »

Hello

Tried searching, not much found.

Question: Does sfml 1-6 have a way/support to do window transparent images?
Or, 'window skinning' ?

I made a nice window frame + buttons for the top, thought I could handle everything code-wise by displaying an empty window frame and just making the size silently bigger then the actual size to fit the frame.

However the edges where the transparency would be, is all black.

So is this possible or should I just make it a square window?
Thanks.