How to never flip a sprite? (eg. to show a music note symbol)

[x2nie]

Hi ! I am creating a parola sprite editor (for vscode). it's works fine for me.

My question is: how can I use a sprite without mirroring horizontally with parolla? explanation: Currently I can play pacman, and this pacman heading to right when it first running, and heading to left in second time. I want to use an musical symbol that it should be never mirrored (flipped horizontally).

my code:

const uint8_t F_NOTE_F = 1;
const uint8_t W_NOTE_F = 8;
const uint8_t PROGMEM note_f[F_NOTE_F * W_NOTE_F] =  // note_f
{
 0x8e, 0x8d, 0x41, 0x61, 0x3f, 0x1e, 0x00, 0x0a,
};

[MajicDesigns]

At the moment there is no way to do this. The sprite will be turned around by the library when the direction changes.

[x2nie]

I need a one more clarification, perhaps my question is not clear enough. For the pacman1, when it is running in real hardware it first running from left to right, and the pacman heading to right side. I can accept it. (my parola sprite editor always drawn the pacman as heading to left (it also "flipped") , that looks like it make my thinking as complicated. I am sorry for that.)

But after pacman reached the screen width, the pacman heading to left side; which is what I want to avoid. So, do you think that the only solution is I should writing a brand new function ? Would you like to give me some clues for doing that?

[x2nie]

Hi, finally I found a solution without need of additional function (can work with current MD_Parola). Well, inspired by Parola_Animation_Catalog.ino that show 2 different sprites for one animation, I created a flipped sprite to be shown as "not flipped" (because the second sprite will always flipped horizontally by library).

The idea is to provide 2 sprites, with the second one as flipped from first sprites

// Sprite Definition
const uint8_t F_ROCKET = 2;
const uint8_t W_ROCKET = 11;
const uint8_t PROGMEM rocket_launch[F_ROCKET * W_ROCKET] =  // rocket
{
  0x18, 0x24, 0x42, 0x81, 0x99, 0x18, 0x99, 0x18, 0xa5, 0x5a, 0x81,
  0x18, 0x24, 0x42, 0x81, 0x18, 0x99, 0x18, 0x99, 0x24, 0x42, 0x99,
};

const uint8_t PROGMEM rocket_depart[F_ROCKET * W_ROCKET] =  // rocket flipped no-flip
{
  0x81, 0x5a, 0xa5, 0x18, 0x99, 0x18, 0x99, 0x81, 0x42, 0x24, 0x18,
  0x99, 0x42, 0x24, 0x99, 0x18, 0x99, 0x18, 0x81, 0x42, 0x24, 0x18,
};

The full source-code below can be shown (as live / online simulation) here : https://wokwi.com/projects/346387200800195154

full code:

// Program to exercise the MD_Parola library
//
// Demonstrates an un-flpped sprite.
// a demo solution of question : https://github.com/MajicDesigns/MD_Parola/issues/102
//
// MD_MAX72XX library can be found at https://github.com/MajicDesigns/MD_MAX72XX
//

#include <MD_Parola.h>
#include <MD_MAX72xx.h>
#include <SPI.h>

// Define the number of devices we have in the chain and the hardware interface
// NOTE: These pin numbers will probably not work with your hardware and may
// need to be adapted
#define HARDWARE_TYPE MD_MAX72XX::PAROLA_HW
#define MAX_DEVICES 11

#define CLK_PIN   13
#define DATA_PIN  11
#define CS_PIN    10

// HARDWARE SPI
MD_Parola P = MD_Parola(HARDWARE_TYPE, CS_PIN, MAX_DEVICES);
// SOFTWARE SPI
//MD_Parola P = MD_Parola(HARDWARE_TYPE, DATA_PIN, CLK_PIN, CS_PIN, MAX_DEVICES);

// Global variables
const char msg[] = "Parola Sprites";

// Sprite Definition
const uint8_t F_ROCKET = 2;
const uint8_t W_ROCKET = 11;
const uint8_t PROGMEM rocket_launch[F_ROCKET * W_ROCKET] =  // rocket
{
  0x18, 0x24, 0x42, 0x81, 0x99, 0x18, 0x99, 0x18, 0xa5, 0x5a, 0x81,
  0x18, 0x24, 0x42, 0x81, 0x18, 0x99, 0x18, 0x99, 0x24, 0x42, 0x99,
};

const uint8_t PROGMEM rocket_depart[F_ROCKET * W_ROCKET] =  // rocket flipped no-flip
{
  0x81, 0x5a, 0xa5, 0x18, 0x99, 0x18, 0x99, 0x81, 0x42, 0x24, 0x18,
  0x99, 0x42, 0x24, 0x99, 0x18, 0x99, 0x18, 0x81, 0x42, 0x24, 0x18,
};

void setup(void)
{
  P.begin();
  P.displayText(msg, PA_CENTER, P.getSpeed(), 1000, PA_SPRITE, PA_SPRITE);
  P.setSpriteData(rocket_launch, W_ROCKET, F_ROCKET, rocket_depart, W_ROCKET, F_ROCKET);
}

void loop(void)
{
  if (P.displayAnimate())
    P.displayReset();
}

[x2nie]

or in easier to see:

[x2nie]

Thanks You !