where is my logic flawed ??? (making font counter)

DrewDough · 2004-03-05T08:31:11

high, im working on a pong clone and now i want to add a score keeper to the top of the screen. basically what i did was i made a bitmap image that looked like this 0123456789 its a .bmp with those numbers next to each other. now, when i go to blit this image, i blit the part starting at the x value of score.digit_#*32 where 32 is the width of a single number. and the y value of 0. and then i blit 32,64 pixels of the image being the width and height of a single number. so, if the score is 0, i start blitting at 32*0 which is the top left corner, where the number 0 is. if the score is 1, it will blit at 32*1, where the number 1 is, etc, etc. NOW here is my logic for the actual score keeping score.digit_1 = 0; //done in the constructor score.digit_2 = 0; //same for this if (enemy_scores) { score.digit_2++; if (score.digit_2 > 9) { score.digit_2 = 0; score.digit_1++; } } basically, it starts at 0 0 .(first digit second digit). if the the enemy scores, it goes to 0 1 , then 0 2, then 0 3, untill it gets to 10 then the second digit will go back to 0 and the first digit will increment, like 0 9, then 1 0. get it? so why the hell is only a 0 displaying on my screen??? the 0 wont inrement. i cant figure out if my logic is flawed in the actual displaying of the image, or the actualy score keeping part. this is killing me. im not that great at debugging (actually have not much a clue how to do it) so im hoping one of you guys can spot my logic flaw. thanks for any help!! im using c++ and SDL [edited by - graveyard filla on February 21, 2004 5:20:57 PM]

For Beginners

Started by graveyard filla February 21, 2004 04:03 PM

11 comments, last by graveyard filla 20 years, 1 month ago

Plasmadog

205

February 22, 2004 04:33 PM

Fair enough, but LuckyNewbie''s method is much safer and more robust, as it does not rely on any previous state. Not to mention the fact that it can be used in situations where the score increments by more than one point at a time.

You are not the one beautiful and unique snowflake who, unlike the rest of us, doesn't have to go through the tedious and difficult process of science in order to establish the truth. You're as foolable as anyone else. And since you have taken no precautions to avoid fooling yourself, the self-evident fact that countless millions of humans before you have also fooled themselves leads me to the parsimonious belief that you have too.--Daniel Rutter

Sluginator

124

March 04, 2004 05:37 PM

I know the Pong clone is done, but I just wanted to say to LuckyNewbie that the score display algorithm is a pretty smart idea also. I never thought of getting digits recursively, either (based on his aside). Good job!

[edited by - Sluginator on March 4, 2004 6:38:31 PM]

Basically, there is a infinite or practically infinite set of things, that includes things such as pluto and quicksort and special relativity, and fart of ant in some specific hive.-Dmytry

Xempest

122

March 05, 2004 08:27 AM

I would recommend using a regular integer, and then learning how to use SDL_TTF. SDL_TTF accepts a character array as the display text, so just use the itoa function (found in stdlib.h) to convert the integer to a proper displaying char array. It's rather simple to do, and it is much easier to manage an actual integer for the score.

By the way: Focus on SDL is written in generic C/C++, until the later chapters, where you are given some nice example classes / class concepts.

[edited by - xempest on March 5, 2004 9:31:11 AM]

where is my logic flawed ??? (making font counter)

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