C/C++ Programming Help Thread

[slicer4ever]

hello

[Raphael]

bye

[slicer4ever]

ok

[Raphael]

no, not ok. Have patience or try to find out yourself.

[slicer4ever]

i have been working on the problem for the past few hours and still haven't returned anything that can help me

[Raphael]

Then you have to be patient. Full stop.

[waywardson]

how would i get lua to print " or , to the screen...when i try printing those to screen i get an error?

[slicer4ever]

wrong thread

[SG57]

Because those are reserved characters (" to end/start a string, ' to end/start a character)

I believe it's the same as in C, but I'm not %100 sure, just give it a try, if not then try the second example

-- 1st example
screen:print(0,0,"\"I was here\", I said")
-- 2nd example
screen:print(0,0,'"' .. "I was here" .. '"' .. ", I said")

[waywardson]

thanks!! sorry i could have sworn i clicked on the lua help thread

[slicer4ever]

it's ok
-= Double Post =-
jw what are the advantages of using a bool over an int with 0 and 1 as true and false

[pspballer07]

I need some help....when I go to display a half transparent image, it works but....when it draws the next frame, the 2 half alpha transparent images(1 from previous frame and another from current frame) are blended. I don't know why because I clear the screen too. (NOTE: I'm usin graphics.h)
Help?
-= Double Post =-

jw what are the advantages of using a bool over an int with 0 and 1 as true and false

bool is like light switch and only use this kind if u only need whether somethings true or false.
if u have to use a specific number then use int.
if ur unsure then use int because int can do everything a bool can do

[SG57]

With booleans you have type-safety. (ex, you can't set a boolean to 2 or 22, else the compiler gives you an error about it, where as an integer it doesnt)

[slicer4ever]

ok so mostly just a safety cjeck thanks adjutant

@pspballer i think u misunderstood i knew what a bool was i was jw what it had over just plainly using an int

and for your question i can't be 100% sure what is wrong without some type of code it is possible you r accidentally re-drawing both which is the only conclusion i can draw from for now

[MiG]

it's ok
-= Double Post =-
jw what are the advantages of using a bool over an int with 0 and 1 as true and false

with a bool:

if (playing) 
{
   //Game Loop
}

can't really do that with an int, it'll always return true ;)

[hallo007]

wrong ,

int true;
..
IF(true)
...
if(!true)



is the same as
if(true == 1)

if(true == 0)

[SG57]

Hence why he used the qualifier 'really'

[hallo007]

he did
but he said

"it'll always return true"

and why are always giving stupid answers , there is no need for

[yaustar]

wrong ,

int true;
..
IF(true)
...
if(!true)



is the same as
if(true == 1)

if(true == 0)

Not quite, the expression for true checks if the integer is not equal to 0.

if( -1 ) // true
if( 3487324344 ) // true
if( -34593243 ) // true
if( 0 ) // false

The whole point of a bool is to clarify to the programmers working on the code that it can only be two values, true or false. Working with ints for on/off expressions is ambiguous to a programmer looking at it for the first time.

[hallo007]

i use macro's for true/false value's

[slicer4ever]

anyways i was just wondering if their were any advantages other than a safety precaution when assigning the variable also i've spent the last few hours on completly re-writing my xfileloader but it still randomly breaks near the beginning heres what i've made which works perfectly on the pc:

Spoiler for code:

#include <string.h>
#include <stdio.h>
#include <malloc.h>
#include <stdlib.h>
#define MAX_VERTICES (5000)

typedef struct {
     unsigned int color;
	float x, y, z;
} Vertex;

typedef struct {
     int current_frame;
     int max_frame;
	int numTriangles;
	int object_play;
	float vertexs[MAX_VERTICES][7];
	Vertex *triangle;
} object;

object loadxfile(char file_name[100]);
void trace(char text[500]);

object test;
object testing;
int main(int argc,char** argv){
     FILE *ofile;
     ofile = fopen("tracee.txt","w");
     fclose(ofile);
     test.triangle = (Vertex*) malloc( 500*3*sizeof(Vertex) );
     testing.triangle = (Vertex*) malloc( 500*3*sizeof(Vertex));

     testing = loadxfile("test0.x");

     for(int i=0;i<testing.numTriangles*3;i++){
          printf("x %d: %f\n",i,testing.triangle[i].x);
          printf("y %d: %f\n",i,testing.triangle[i].y);
          printf("z %d: %f\n\n",i,testing.triangle[i].z);
     }

     return 0;
}

void trace(char text[500]){
     FILE *ofile;
     ofile = fopen("tracee.txt","a+");
     fputs(text,ofile);
     fputs("\n",ofile);
     fclose(ofile);
}


object loadxfile(char file_name[100]){
     FILE *pfile;
     long lsize;
     char *buffer;
     char trace_string[30];
     size_t result;
     pfile = fopen(file_name,"r");
     if(pfile == NULL){
          trace("error in reading file");
          exit(1);
     }
     fseek(pfile,0,SEEK_END);
     lsize = ftell(pfile);
     rewind(pfile);
     buffer = (char*) malloc (sizeof(char)*lsize);
     if(buffer==NULL){
          trace("error in storing file");
          exit(2);
     }
     result = fread(buffer,1,lsize,pfile);
     if(result != lsize){
          trace("error in copying file into buffer");
          exit(3);
     }
     trace("closing file");
     fclose(pfile);

     char string[0];
     int current_letter;
     char last_word[200];
     char adding_word[200];
     char numbers[0];
     int numbers_being_read=0;
     int decimals_being_read=0;
     int number_of_brackets=0;
     int frame_bracket=0;
     int current_mesh_point=0;
     float number=0.0f;
     int current_decimal=1;
     float number_going_in=0.0f;
     int current_mesh=1;
     int number_of_vertexs[20];
     int number_of_polygons[20];
     int number_is_negative=0;
     int current_vertex=0;
     int current_polygon=0;
     int total_polygons=0;
     int xyz=1;
     float vertexs[20][500][3];
     int polygons[20][500][3];
     int semi_colons_in_row=0;
     int full=0;
     int next=0;
     for(current_letter=0;current_letter<strlen(buffer);current_letter++){
          sprintf(string,"%c",buffer[current_letter]);
          trace(string);
          if(strcmp(string," ")==0 || strcmp(string,"	")==0){
               sprintf(last_word,"%s",adding_word);
               sprintf(adding_word," ");
          }else
          if(strcmp(string,"{")==0){
               number_of_brackets++;
          }else
          if(strcmp(string,"}")==0){
               number_of_brackets--;
          }else
          if(!(strcmp(string,"_")==0 || strcmp(string,".")==0 || strcmp(string,"-")==0 || strcmp(string,";")==0 || strcmp(string,",")==0 || strcmp(string,"0")==0 || strcmp(string,"1")==0 || strcmp(string,"2")==0 || strcmp(string,"3")==0 || strcmp(string,"4")==0 || strcmp(string,"5")==0 || strcmp(string,"6")==0 || strcmp(string,"7")==0 || strcmp(string,"8")==0 || strcmp(string,"9")==0)){
               sprintf(adding_word,"%s%s",adding_word,string);
          }else
          if(strcmp(string,"_")!=0 && numbers_being_read==1){
               sprintf(numbers,"%c",string[0]);
               if(strcmp(numbers,"0")==0){
                    number_going_in=0;
               }
               if(strcmp(numbers,"1")==0){
                    number_going_in=1;
               }
               if(strcmp(numbers,"2")==0){
                    number_going_in=2;
               }
               if(strcmp(numbers,"3")==0){
                    number_going_in=3;
               }
               if(strcmp(numbers,"4")==0){
                    number_going_in=4;
               }
               if(strcmp(numbers,"5")==0){
                    number_going_in=5;
               }
               if(strcmp(numbers,"6")==0){
                    number_going_in=6;
               }
               if(strcmp(numbers,"7")==0){
                    number_going_in=7;
               }
               if(strcmp(numbers,"8")==0){
                    number_going_in=8;
               }
               if(strcmp(numbers,"9")==0){
                    number_going_in=9;
               }
               if(strcmp(numbers,".")==0){
                    decimals_being_read=1;
                    number_going_in=0.0f;
               }
               if(strcmp(numbers,"-")==0){
                    number_is_negative=1;
               }
               if(strcmp(numbers,",")==0){
                    current_decimal=1;
                    decimals_being_read=0;
                    if(current_mesh_point==5){
                         if(semi_colons_in_row==2){
                              polygons[current_mesh][current_polygon][xyz]=(int)number;
                              xyz++;
                              if(xyz>3){
                                   xyz=1;
                                   current_polygon++;
                              }
                         }
                    }
                    number=0.0f;
                    number_going_in=0.0f;
               }
               if(strcmp(numbers,";")==0){
                    current_decimal=1;
                    decimals_being_read=0;
                    semi_colons_in_row++;
                    if(number_is_negative==1){
                         number=number*-1;
                    }
                    number_is_negative=0;

                    if(current_mesh_point==5){
                         if(semi_colons_in_row==3){
                              polygons[current_mesh][current_polygon][xyz]=(int)number;
                              xyz++;
                              if(xyz>3){
                                   xyz=1;
                                   current_polygon++;
                              }
                         }
                         if(semi_colons_in_row==4){
                              current_mesh_point=0;
                              current_polygon=0;
                              xyz=1;
                              numbers_being_read=0;
                              trace("finished reading mesh");
                              current_mesh++;
                         }
                    }
                    if(current_mesh_point==4){
                         number_of_polygons[current_mesh]=(int)number;
                         current_mesh_point=5;
                    }
                    if(current_mesh_point==3){
                         if(semi_colons_in_row==1){
                              vertexs[current_mesh][current_vertex][xyz]=number;
                              xyz++;
                              if(xyz>3){
                                   xyz=1;
                                   current_vertex++;
                              }
                         }
                         if(semi_colons_in_row==2){
                              current_mesh_point=4;
                              current_vertex=0;
                              xyz=1;
                         }
                    }
                    if(current_mesh_point==2){
                         number_of_vertexs[current_mesh]=(int)number;
                         current_mesh_point=3;
                    }
                    number=0.0f;
                    number_going_in=0.0f;
               }
               if(!(strcmp(numbers,";")==0)){
                    if(current_mesh_point!=5){
                         semi_colons_in_row=0;
                    }
                    if(current_mesh_point==5){
                         if(semi_colons_in_row==3){
                              semi_colons_in_row=1;
                         }
                    }
               }
               if(decimals_being_read==0){
                    number=number*10+number_going_in;
               }else{
                    number+=(number_going_in/current_decimal);
                    current_decimal=current_decimal*10;
               }
          }
          if(strcmp(last_word," Mesh")==0 && current_mesh_point==0){
               trace("mesh found");
               frame_bracket=number_of_brackets+1;
               current_mesh_point=1;
          }
          if(current_mesh_point==1 && number_of_brackets==frame_bracket){
               current_mesh_point=2;
               numbers_being_read=1;
               trace("reading mesh now");
          }
     }

     trace("freeing buffer");
     free(buffer);

     trace("getting total number of vertices");
     for(int i=1;i<current_mesh;i++){
          total_polygons+=number_of_polygons[i];
     }

     test.numTriangles = total_polygons;
     for(int i=1;i<current_mesh;i++){
          for(int b=0;b<number_of_polygons[i]*3;b++){
               test.vertexs[full][1] = vertexs[i][polygons[i][b][1]][1];
               test.vertexs[full][2] = vertexs[i][polygons[i][b][2]][2];
               test.vertexs[full][3] = vertexs[i][polygons[i][b][3]][3];
               full++;
          }
     }
     full=0;
     for(int i=1;i<current_mesh;i++){
          for(int b=0;b<number_of_polygons[i]*3;b++){
               test.triangle[full].x = test.vertexs[full][1];
               test.triangle[full].y = test.vertexs[full][2];
               test.triangle[full].z = test.vertexs[full][3];
               full++;
          }
     }
     trace("adding in last of the returning info");
     test.object_play=0;
     test.current_frame=1;
     test.max_frame=1;
     trace("returning info");
     return test;
}

any1 see a reason as to why please post i just don't understand why it works on the computer yet refuses to work on the psp and i don't think i'm running out of memory but it is a posibility

[yaustar]

@slice4ever: Two wild guesses:
1) You are over running/under running some arrays which is crashing the PSP. The fact that it works on the PC is irrelevant in this case, you need to debug on the PC with asserts and bounds checking.

2) You are overflowing the stack memory judging by the size of the arrays for the polygons and vertices that you are creating.
-= Double Post =-

i use macro's for true/false value's

Don't use #defines, use enums lists and then the enum type instead of ints.

[slicer4ever]

well i guess i'll check it in the afternoon as it's 6:30 am where i live so night ever1

[JaSo PsP]

Are you making a program to load .x files? Thats cool if you could incorporate it into the PSP GU then i would be more interested in using PSP GU.

[Auraomega]

I'm having problems multi-threading and using the controls... whenever I try to move my charactor in any direction, it moves a random amount of spaces before it stops...I've also tried allowing the charactor to only after the button has been pressed and released, but that makes no difference. This only happens when multi-threading, I've launched that single thread on its own and everything works fine, so I was wondering if anyone could give me any sort of advice.

So far I've tried giving the problem thread a higher priority, but nothing, and I've tried changing the cycle rate (and whatever the other rate was) for the controls, but none of those has made any difference.

I've done very little multi-thread work, and I've not really used a lot of the commands in the pspctrl.h file, so I'm probably quite oblivious to an answer thats staring me in the face, but I've tried everything that comes to mind.

Well anyway, thanks for any help in advance.
-Aura

[PSPJunkie_]

Are you making a program to load .x files? Thats cool if you could incorporate it into the PSP GU then i would be more interested in using PSP GU.

Why is that?

[JaSo PsP]

Why is that?

The PSP GU tutorials ive been using dont tell me how to load meshes, plus i know how to make/work with .x files because ive been leraning DirectX.

[PSPJunkie_]

i use macro's for true/false value's

#define FALSE 0
#define TRUE !FALSE

-= Double Post =-

The PSP GU tutorials ive been using dont tell me how to load meshes, plus i know how to make/work with .x files because ive been leraning DirectX.

I did MD2 using the GU. Also, making a GU powered .x loader would have no relevance to DirectX.

By the way, the MD2 loader can be found here.

[slicer4ever]

@jaso yes i plan to make a library with many functions that the gu doesn't provide include loading .x files coloring different meshs of the object and playing animation, which i have the rest down it just requires me getting this load x file to fully work

edit: also it's not using directx i'm writing it from scratch so like junkie said:

Also, making a GU powered .x loader would have no relevance to DirectX.

[bilzoo2000]

i am new to c++ i need a good compiler can anyone help me? i havent even been able to make "hello world" yet