How to draw Fill Triangle using the library Adafruit GFX library?

Other Hardware Displays
6

@Campax2,

There were a LOT of syntax errors, bad practice, ...
Here is some example code:

#include <MCUFRIEND_kbv.h> //Librería Necesaria
MCUFRIEND_kbv tft;

#include <FreeDefaultFonts.h>   //SmallFont, BigFont, SevenSegFont
#include <Fonts/FreeSerif12pt7b.h> //Free Font that comes with GFX

#define NEGRO     0x0000
#define AZUL      0x001F
#define ROJO      0xF800
#define VERDE     0x07E0
#define CIAN      0x07FF
#define MAGENTA   0xF81F
#define AMARILLO  0xFFE0
#define BLANCO    0xFFFF

int color;
int led = 10; //Pin PWM donde va conectado el LED

//Define el ancho y largo de la pantalla en pixeles
int x_size = 480; int y_size = 320;

bool settscrsize (int w, int h)
{
    if ((w <= 0) || (h <= 0)) return false;
    x_size = w; y_size = h;
    return true;
}


void LogoSielco(int x1, int y1)
{
    // these are all Adafruit_GFX class methods
    tft.setFont(&FreeBigFont);   //note that you use &
    //    tft.setFont(&FreeSerif12pt7b);   //better looking font
    tft.fillTriangle(x1, y1, x1 + 19, y1, x1, y1 + 19, ROJO);
    tft.fillTriangle(x1 + 18, y1 + 1, x1 + 23, y1 - 5, x1 + 12, y1 + 1, ROJO);
    tft.fillTriangle(x1 + 2, y1 + 18, x1 + 4, y1 + 18, x1 + 2, y1 + 14, ROJO);
    tft.fillTriangle(x1 + 3, y1 + 14, x1 + 8, y1 + 14, x1 + 5, y1 + 19, ROJO);
    tft.fillTriangle(x1 + 23, y1 + 6, x1 + 23, y1 + 26, x1 + 3, y1 + 26, NEGRO);
    tft.fillTriangle(x1 + 2, y1 + 27, x1 - 1, y1 + 31, x1 + 7, y1 + 27, NEGRO);
    tft.fillTriangle(x1 + 21, y1 + 7, x1 + 18, y1 + 7, x1 + 20, y1 + 10, NEGRO);
    tft.fillTriangle(x1 + 18, y1 + 5, x1 + 13, y1 + 12, x1 + 19, y1 + 12, NEGRO);
    tft.setTextColor(NEGRO);             //Free Fonts always transparent
    tft.setCursor(x1 + 24, y1 + 5 + 10); //Free Fonts draw from baseline
    // Print class methods from Print.h
    tft.print("Sielco");
}

void setup(void)
{
    // these are MCUFRIEND_kbv methods
    uint16_t ID = tft.readID();
    tft.begin(ID);
    // these are all Adafruit_GFX class methods
    tft.setRotation(1);         //Landscape
    tft.fillScreen(BLANCO);
}

void loop(void)
{
    LogoSielco(180, 80);
}

From the extras/mcufriend_how_to.txt:

MCUFRIEND_kbv inherits all the methods from
the Adafruit_GFX class: Overview | Adafruit GFX Graphics Library | Adafruit Learning System
and Print class: Serial.print() - Arduino Reference

The only "new" methods are hardware related:
vertScroll(), readGRAM(), readPixel(), setAddrWindow(), pushColors(), readID(), begin()
readReg(), pushCommand(), WriteCmdData() access the controller registers

I suggest that you try the GFX tutorial.
Please ask questions. Quote which example or tutorial you are having difficulty with.
People are happy to help. (if they know where to look e.g. link or sketch name)

David.