Original TNTexplosion:

TRIGGER TNTexplosion {
	DRAW 0 FILLEDCIRCLE X1 Y1 (0 RAND 20) 0
	FOR explosion1raycount FROM 1 TO 2 DO TNTexplosionRay (X1 * 100) (Y1 * 100) ((0 - 100) RAND 100) ((0 - 100) RAND 100) (25 RAND 50)
}

TRIGGER TNTexplosionRay {
	DRAW elementfire FILLEDCIRCLE ($0 / 100) ($1 / 100) 2 0
	IF ($4 > 0) <TIMER 1 FRAMES TNTexplosionRay ($0 - $3) ($1 - $2) ($2 - 1) $3 ($4 - 1)>
}

lets just take the first trigger, and put some static value:

TRIGGER TNTexplosion {
	DRAW 0 FILLEDCIRCLE X1 Y1 (0 RAND 20) 0
	FOR explosion1raycount FROM 1 TO 2 DO TNTexplosionRay (X1 * 100) (Y1 * 100) 100 300 50
}

Now lets explain theses : (X1 * 100) (Y1 * 100) 100 300 50

• (X1 * 100) : This is the X position to start the explosion. (X)
• (Y1 * 100) : This is the Y position to start the explosion. (Y)
• 100 : This is the Y movement offset on the screen. Negative is Down and Positive is Up. (Y_MOVE)
• 300 : This is the X movement offset on the screen. Negative is Left and Positive is Right. (X_MOVE)
• 50 : This is the life of the explosion. (LIFE)
  • Note that all value (except life) are multiplied by 100, this is to get more precise movement on the screen.

So to make the explosion going in all direction, not only one, you must use RAND, thats what Sieben use in his explosion, like the first below.

The FOR … FROM 1 TO 2 DO … part is the number of projectile you want in the explosion.

Best way to get what you want, is trial & errors. Change some value and see whats the difference until you get what you want.