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Bullet Code Problems
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Spenceboy98


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Joined: 06 Jan 2012
Posts: 824
Location: In the TARDIS
Posted: 22 Apr 2012 06:56:03 pm    Post subject: Bullet Code Problems
Bullet is the name of the game I'm making, but the code is being spo annoying. I can't figure out what's wrong. Help please:


Code:
#include "keyboard.hpp"   
#include "color.h"   
#include "display.h"   
#include "keyboard_syscalls.h"   
#include "PictureData.h"   
#include "stdlib.h"

void CopySprite(const void* datar, int x, int y, int width, int height) {     
   color_t*data = (color_t*) datar;     
   color_t* VRAM = (color_t*)0xA8000000;     
   VRAM += LCD_WIDTH_PX*y + x;     
   for(int j=y; j<y+height; j++) {     
      for(int i=x; i<x+width; i++) {     
         *(VRAM++) = *(data++);     
     }     
     VRAM += LCD_WIDTH_PX-width;     
   }     
}   

void CopySpriteMasked(const void*datar, int x, int y, int width, int height, int maskcolor) {
   color_t*data = (color_t*) datar;
   color_t* VRAM = (color_t*)0xA8000000;
   VRAM += LCD_WIDTH_PX*y + x;
   for(int j=y; j<y+height; j++) {
      for(int i=x; i<x+width;  i++) {
         if (*(data) != maskcolor) {
            *(VRAM++) = *(data++);
         } else { VRAM++; data++; }
      }
      VRAM += LCD_WIDTH_PX-width;
   }
}


int PRGM_GetKey(){     
  unsigned char buffer[12];     
  PRGM_GetKey_OS( buffer );     
  return ( buffer[1] & 0x0F ) * 10 + ( ( buffer[2] & 0xF0 ) >> 4 );     
}   



struct Coord {   


   int x;   


   int y;   


};   

int keydown(int basic_keycode)   
{   
   const unsigned short* keyboard_register = (unsigned short*)0xA44B0000;   
   int row, col, word, bit;   
   row = basic_keycode%10;   
   col = basic_keycode/10-1;   
   word = row>>1;   
   bit = col + 8*(row&1);   
   return (0 != (keyboard_register[word] & 1<<bit));   
}   

void moveCursor(struct Coord* cursor) {       
   if( keydown(KEY_PRGM_LEFT) && cursor->x>45) cursor->x-=8;   
   if( keydown(KEY_PRGM_RIGHT) && cursor->x<302) cursor->x+=8;   
}   



int main() {     
  int y = 129;   
  while(1) {     
    int key = PRGM_GetKey();     
    if(key == KEY_PRGM_MENU) {  GetKey(&key); }         
    CopySprite(BulletMenu, 0, 0, 384, 216);
    CopySpriteMasked(BulletMenuSelector, 7, y, 18, 16, COLOR_RED);
    if(keydown(KEY_PRGM_UP) && y>129)
    y-=16;
    if(keydown(KEY_PRGM_DOWN) && y<145)
    y+=16;
    if(keydown(KEY_PRGM_SHIFT) && y == 129) {
while(1) {     
  struct Coord cur;   
  cur.x = 128;   
  int w = rand()%(340-45+1) + 45;
  int b = rand()%(340-45+1) + 45;
  int j = 0;
  int s = 0;
    int key = PRGM_GetKey();     
    if(key == KEY_PRGM_MENU) {  GetKey(&key); }         
    moveCursor(&cur);   
    CopySprite(BulletBackground, 0, 0, 384, 216);
    CopySpriteMasked(SpenBullet, cur.x, 159, 38, 43, COLOR_RED);
    CopySpriteMasked(Banana, w, j, 75, 80, COLOR_RED);
    CopySpriteMasked(LSDOMG, b, j, 34, 34, COLOR_RED);
    if(w == cur.x && j == 159)
    break;
    if(b == cur.x && j == 159)
    s++;
    j+=8;
    if(j >= 216) {
  j = 0;
  w = rand()%(340-45+1) + 45;
  b = rand()%(340-45+1) + 45;
}
    if(keydown(KEY_PRGM_EXIT))
    break;
    Bdisp_PutDisp_DD();     
    Bdisp_AllCr_VRAM();
  }     }
    if(keydown(KEY_PRGM_SHIFT) && y == 145) {
while(1) {
    CopySprite(Instructions, 0, 0, 384, 216);
    if(keydown(KEY_PRGM_EXIT))
    break;
    Bdisp_PutDisp_DD();     
    Bdisp_AllCr_VRAM();
}
  return 0;
}
    Bdisp_PutDisp_DD();     
    Bdisp_AllCr_VRAM();

}

  return 0;     
}


Help fix it. PLEASE!
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souvik1997


Guru-in-Training


Joined: 19 Apr 2010
Posts: 2870
Posted: 22 Apr 2012 06:57:41 pm    Post subject:
What's happening with your code? We can't just magically fix it if you don't tell us what's wrong.
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Spenceboy98


Super-Expert


Joined: 06 Jan 2012
Posts: 824
Location: In the TARDIS
Posted: 22 Apr 2012 07:00:03 pm    Post subject:
When I put it on my Prizm, the Banana/LSDOMG sprites jerk around the top of the screen. Even though it is supposed to make them scroll to the bottom of the screen and regenerate somewhere else at the top.

Edit:

Here is the g3a file. Enjoy.....

http://www.mediafire.com/?79bchn1nyyfcyv2
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souvik1997


Guru-in-Training


Joined: 19 Apr 2010
Posts: 2870
Posted: 22 Apr 2012 07:08:19 pm    Post subject:
Quote:
int w = rand()%(340-45+1) + 45;
int b = rand()%(340-45+1) + 45;
int j = 0;
int s = 0;
int key = PRGM_GetKey();
if(key == KEY_PRGM_MENU) { GetKey(&key); }
moveCursor(&cur);
CopySprite(BulletBackground, 0, 0, 384, 216);
CopySpriteMasked(SpenBullet, cur.x, 159, 38, 43, COLOR_RED);
CopySpriteMasked(Banana, w, j, 75, 80, COLOR_RED);
CopySpriteMasked(LSDOMG, b, j, 34, 34, COLOR_RED);

You're setting the coordinates for the sprites every time the loop repeats. Set the variables outside the loop.
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Spenceboy98


Super-Expert


Joined: 06 Jan 2012
Posts: 824
Location: In the TARDIS
Posted: 22 Apr 2012 07:15:50 pm    Post subject:
Now how will I make it detect if the banana or coin(LSDOMG) hits it or not?.........
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souvik1997


Guru-in-Training


Joined: 19 Apr 2010
Posts: 2870
Posted: 22 Apr 2012 07:17:29 pm    Post subject:
Spenceboy98 wrote:
Now how will I make it detect if the banana or coin(LSDOMG) hits it or not?.........

Umm..

Code:
if(w == cur.x && j == 159)
    break;
    if(b == cur.x && j == 159)
    s++;

You already have code to detect if it hit the cursor.
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Spenceboy98


Super-Expert


Joined: 06 Jan 2012
Posts: 824
Location: In the TARDIS
Posted: 22 Apr 2012 07:21:10 pm    Post subject:
Yes, but it only detects when it is exactly the same coordinates.
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Ashbad


... I think redheaded girls are kind of cool


Joined: 01 Dec 2010
Posts: 2418
Location: Stomp Stomp Stomp, The Idiot Convention
Posted: 22 Apr 2012 07:22:23 pm    Post subject:
Spenceboy98 wrote:
Yes, but it only detects when it is exactly the same coordinates.


Seems you're going to need to check if it's in a box of a certain size, using position offsets and the >, <, >=, <= operators instead of the == operator.
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_player1537


Guru-in-Training


Joined: 25 Nov 2009
Posts: 2958
Posted: 22 Apr 2012 07:24:28 pm    Post subject:
Or you could use the absolute value trick. Such as: if (abs(bulletX - playerX) <= 10) { /* within 10 pixels on either side */ }.
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Spenceboy98


Super-Expert


Joined: 06 Jan 2012
Posts: 824
Location: In the TARDIS
Posted: 23 Apr 2012 06:17:20 pm    Post subject:
_player1537 wrote:
Or you could use the absolute value trick. Such as: if (abs(bulletX - playerX) <= 10) { /* within 10 pixels on either side */ }.


Now it says


Code:
main.c:99:5: warning: implicit declaration of function 'abs' [-Wimplicit-functio
n-declaration]


Now what?
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Ashbad


... I think redheaded girls are kind of cool


Joined: 01 Dec 2010
Posts: 2418
Location: Stomp Stomp Stomp, The Idiot Convention
Posted: 23 Apr 2012 06:19:37 pm    Post subject:
you need to define abs.


Code:
inline int abs(int a) { return (a < 0) ? (-a) : (a); }

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Spenceboy98


Super-Expert


Joined: 06 Jan 2012
Posts: 824
Location: In the TARDIS
Posted: 23 Apr 2012 06:26:32 pm    Post subject:
Now, whenever you are underneath the bullet coming toward you, it exits anyways. No matter how far away from it you are.
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KermMartian


Site Admin


Joined: 14 Mar 2005
Posts: 55763
Location: Earth, Sol, Milky Way
Posted: 24 Apr 2012 12:57:48 pm    Post subject:
Ashbad wrote:
you need to define abs.


Code:
inline int abs(int a) { return (a < 0) ? (-a) : (a); }
There's a better way to do this:


Code:
#define abs(a) ((a) < 0 ? (-(a)):(a))
This will work for any numeric data type. Smile

Spence: Then you didn't use it correctly. You should check when the absolute difference in X is less than or equal to (some distance), and the difference is Y is also less than or equal to (some distance). Maybe you aren't properly cancelling the bullet?
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blue_bear_94


Member


Joined: 20 Apr 2012
Posts: 162
Posted: 24 Apr 2012 05:00:17 pm    Post subject:
I think the abs( function was already defined in stdlib.h.
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Ashbad


... I think redheaded girls are kind of cool


Joined: 01 Dec 2010
Posts: 2418
Location: Stomp Stomp Stomp, The Idiot Convention
Posted: 24 Apr 2012 05:01:16 pm    Post subject:
blue_bear_94 wrote:
I think the abs( function was already defined in stdlib.h.


Unfortunately, the PrizmSDK's C standard library is far from being completely filled in; abs() isn't defined there officially yet.
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merthsoft


File Archiver


Joined: 09 May 2010
Posts: 2735
Posted: 24 Apr 2012 05:02:01 pm    Post subject:
KermMartian wrote:
Ashbad wrote:
you need to define abs.


Code:
inline int abs(int a) { return (a < 0) ? (-a) : (a); }
There's a better way to do this:


Code:
#define abs(a) ((a) < 0 ? (-(a)):(a))
This will work for any numeric data type. Smile
And breaks for abs(someFuncThatReturnsAValue()) and abs(x++), right? I remember benryves and Catherine talking about this last night. In any case, I prefer functions to macros. Macros feel dirty.
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Tari


Systems Integrator


Joined: 03 Jul 2006
Posts: 2113
Location: Always-winter, Michigan
Posted: 24 Apr 2012 05:26:51 pm    Post subject:
Ashbad wrote:
blue_bear_94 wrote:
I think the abs( function was already defined in stdlib.h.


Unfortunately, the PrizmSDK's C standard library is far from being completely filled in; abs() isn't defined there officially yet.

You're both wrong. abs() is a GCC builtin (unless you force strict adherence to the standard), but nothing included the prototype, hence the warning-- note that was not an error, but a warning.


Code:
int abs(int);

will do the trick until somebody bothers putting them in the headers.
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Spenceboy98


Super-Expert


Joined: 06 Jan 2012
Posts: 824
Location: In the TARDIS
Posted: 28 Apr 2012 03:12:48 pm    Post subject:
I'm guessing that it is too big to compile:


Code:
/prizmsdk-0.3/prizmsdk-0.3/bin/../lib/gcc/sh3eb-elf/4.6.0/../../../../sh3eb-
elf/bin/ld.exe: region `rom' overflowed by 159776 bytes
collect2: ld returned 1 exit status
make: *** [Bullet.bin] Error 1
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Ashbad


... I think redheaded girls are kind of cool


Joined: 01 Dec 2010
Posts: 2418
Location: Stomp Stomp Stomp, The Idiot Convention
Posted: 28 Apr 2012 03:16:29 pm    Post subject:
Spenceboy98 wrote:
I'm guessing that it is too big to compile:


Code:
/prizmsdk-0.3/prizmsdk-0.3/bin/../lib/gcc/sh3eb-elf/4.6.0/../../../../sh3eb-
elf/bin/ld.exe: region `rom' overflowed by 159776 bytes
collect2: ld returned 1 exit status
make: *** [Bullet.bin] Error 1


What did you stick in it, 3 screen-sized textures? If you want to make it bigger, change your "rom: l=500K" (or something like that) in Prizm.ld in the "common" folder of the SDK to "l=1250K", which is a safe number.
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Spenceboy98


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Joined: 06 Jan 2012
Posts: 824
Location: In the TARDIS
Posted: 30 Apr 2012 09:05:43 pm    Post subject:
It doesn't display the pic at the end. Here's code:


Code:
int main() {     
  int y = 129;   
  while(1) {     
    int key = PRGM_GetKey();     
    if(key == KEY_PRGM_MENU) {  GetKey(&key); }         
    CopySprite(BulletMenu, 0, 0, 384, 216);
    CopySpriteMasked(BulletMenuSelector, 7, y, 18, 16, COLOR_RED);
    if(keydown(KEY_PRGM_UP) && y>129)
    y-=16;
    if(keydown(KEY_PRGM_DOWN) && y<145)
    y+=16;
    if(keydown(KEY_PRGM_SHIFT) && y == 129) {
  struct Coord cur;   
  cur.x = 128;   
  cur.y = 159;
  int w = rand()%(265-45+1) + 45;
  int b = rand()%(306-45+1) + 45;
  int j = -80;
  int m = -34;
  int s = 0;
  int t = 0;
while(1) {     
    int key = PRGM_GetKey();     
    if(key == KEY_PRGM_MENU) {  GetKey(&key); }         
    moveCursor(&cur);   
    CopySprite(BulletBackground, 0, 0, 384, 216);
    CopySpriteMasked(SpenBullet, cur.x, cur.y, 38, 43, COLOR_RED);
    CopySpriteMasked(Banana, w, j, 75, 80, COLOR_RED);
    CopySpriteMasked(LSDOMG, b, m, 34, 34, COLOR_RED);
    if ((cur.x >= w+10 && cur.x <= w+59) && (cur.y >= j+15 && cur.y <= j+71))
    break;
    if ((cur.x >= b+4 && cur.x <= b+30) && (cur.y >= m+4 && cur.y <= m+30)) {
    s++;
    m = -34;
    b = rand()%(340-45+1) + 45;}
    j+=8;
    m+=8;
    if(j > 216) {
  j = -80;
  w = rand()%(340-45+1) + 45; }
    if(m > 216) {
    m = -34;
    b = rand()%(340-45+1) + 45;}
    if(keydown(KEY_PRGM_EXIT))
    break;
    t++;
    if(t >= 1000){
    CopySprite(BulletPerson, 0, 0, 384, 216);
    break;}
    Bdisp_PutDisp_DD();     
    Bdisp_AllCr_VRAM();
  }     }
    if(keydown(KEY_PRGM_SHIFT) && y == 145) {
while(1) {
    CopySprite(Instructions, 0, 0, 384, 216);
    if(keydown(KEY_PRGM_EXIT))
    break;
    Bdisp_PutDisp_DD();     
    Bdisp_AllCr_VRAM();
}

}
    Bdisp_PutDisp_DD();     
    Bdisp_AllCr_VRAM();

}

  return 0;     
}
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