Messages

1

Graphics / Rendering a sf::Sprite using a shader results in an inverted Y-axis?

« on: October 05, 2016, 11:18:15 pm »

I've recently been toying around with Shaders and I found out that, unless I use a sf::RenderTexture, the displayed result is always Y-Inverted.

// General parameters
uniform sampler2D tex0;
uniform sampler2D tex1;
uniform float time;
uniform vec2 resolution;
 
const vec2 center = vec2(0.5, 0.5);

float quadraticInOut(float t) {
  float p = 2.0 * t * t;
  return t < 0.5 ? p : -p + (4.0 * t) - 1.0;
}

float rand(vec2 co) {
  return fract(sin(dot(co.xy ,vec2(12.9898,78.233))) * 43758.5453);
}

void main() {
  vec2 p = gl_FragCoord.xy / resolution.xy;
 
  if (time == 0.0) {
    gl_FragColor = texture2D(tex0, p);
  } else if (time == 1.0) {
    gl_FragColor = texture2D(tex1, p);
  } else {
    float x = time;
    float dist = distance(center, p);
    float r = x - min(rand(vec2(p.y, 0.0)), rand(vec2(0.0, p.x)));
    float m = dist <= r ? 1.0 : 0.0;
    gl_FragColor = mix(texture2D(tex0, p), texture2D(tex1, p), m);    
  }
 
}

A simple shader like this one, only a fragment shader might I add, is always upside down.

Is there something I'm missing? 
I'm quite new to shaders so keep that in mind.

2

Graphics / Re: All fonts I try to use are blurred randomly.

« on: July 26, 2016, 01:51:32 pm »

Very good.

Casting the origin to an int fixed it.

sf::FloatRect textRect = _pText->getLocalBounds();
_pText->setOrigin(static_cast<int>(textRect.left + textRect.width / 2.0f), static_cast<int>(textRect.top + textRect.height / 2.0f));
 

Thanks everybody!

3

Graphics / [SOLVED] All fonts I try to use are blurred randomly.

« on: July 26, 2016, 01:22:25 pm »

I've been struggling with this for a whole day now and I decided to ask it again, seeing as this is (used to be?) a common problem.

My sf::Font is always blurred unless they are really big (Bigger then 20px or 32px for some).

DialogueFont = new sf::Font;
        if (!DialogueFont->loadFromFile(Folders::ROOT_FOLDER + Folders::DIALOGUE_FOLDER + "Ace-Attorney.ttf"))
        {
                std::cout << "Failed to load Dialogue font!" << std::endl;
        }

        TextRenderer = new sf::Text();
        TextRenderer->setFont(*DialogueFont);
        TextRenderer->setColor(sf::Color::White);

----more code here----

        TextRenderer->setString(pCurrentUnit->getCHAR()->getNAME());
        TextRenderer->setCharacterSize(16);
        TextSanitizer::CenterOrigin(TextRenderer);
        TextRenderer->setPosition(108, 34);
        pWindow->draw(*TextRenderer);

        TextRenderer->setString(pCurrentUnit->getCLASS()->GetNAME());
        TextSanitizer::CenterOrigin(TextRenderer);
        TextRenderer->setPosition(242, 34);
        pWindow->draw(*TextRenderer);
 

It's always random, some texts come out crisp and other ones unreadable. I've read about Issue #228 but that's 4 years ago, wich said it got fixed in SFML 2, wich I use. The rest all say that the position should be rounded to ints, but mine already are ints.

I tried about 15 fonts and none will show normal consistently at 16px. Not even Arial works.

void TextSanitizer::CenterOrigin(sf::Text* _pText)
{
        sf::FloatRect textRect = _pText->getLocalBounds();
        _pText->setOrigin(textRect.left + textRect.width / 2.0f, textRect.top + textRect.height / 2.0f);
}
 

If you wanna see the centering code.