98 lines
2.7 KiB
C
98 lines
2.7 KiB
C
#define _POSIX_C_SOURCE 200809L // for strnlen
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#include <stdio.h>
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#include <string.h>
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char s[4] = "0000";
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char f = 'A';
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unsigned fi = 0;
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unsigned sp = 1;
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unsigned max = 0;
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unsigned sk = 1;
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unsigned mdl = 0;
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// recursion is fun
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int advance_sprite( int idx );
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int advance_sprite( int idx )
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{
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if ( idx < 0 ) return 0; // we reached the limit, bail out
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if ( s[idx] == '9' ) s[idx] = 'A'; // from 9 to A
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else if ( s[idx] == 'Z' ) // at limit
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{
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// advance the previous char
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if ( !advance_sprite(idx-1) ) return 0; // no more, bail out
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s[idx] = '0'; // restart
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}
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else s[idx]++; // just increment
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return 1;
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}
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int advance_frame( void )
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{
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printf("\tFrameIndex %.4s %c %d %d\n",s,f,mdl,fi);
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fi+=sk; // advance frame in model
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f++; // advance frame in sprite
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if ( f > 'Z' ) // note that [,\ and ] are not used. this is personal preference, really
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{
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// we need to change the sprite name
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if ( !advance_sprite(3) ) return 0; // can't advance further
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f = 'A'; // restart
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}
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return 1;
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}
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int main( int argc, char **argv )
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{
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if ( argc < 5 )
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{
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fprintf(stderr,"usage: pframes <sprite name> <start frame> <max frames> [frame step] [model index] [first sprite frame]\n"
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"\n"
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" - sprite name: must be 4 characters.\n"
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" - start frame: frame offset within the model to start from.\n"
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" - max frames: limit on frames advanced.\n"
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" - frame step: how many frames to move each step (default:1, must be higher than zero).\n"
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" - model index: which model to assign (default: 0).\n"
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" - first sprite frame: which sprite frame to start from (default: A).\n"
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"\n"
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" Frames advance from A to Z, wrapping around.\n"
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" Each wrap, the fourth char of the sprite name will be cycled, from 0 to 9, then A to Z.\n"
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" After ###Z is reached, the third character will by cycled instead.\n"
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" And so on for the second, then the first...\n"
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" If you somehow run out of sprite names, you need to be more reasonable. (^^;\n");
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return 1;
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}
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strncpy(s,argv[1],4);
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if ( strnlen(s,4) < 4 )
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{
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fprintf(stderr,"fatal: sprite name must be 4 characters.\n");
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return 2;
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}
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sscanf(argv[2],"%u",&fi);
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sscanf(argv[3],"%u",&max);
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if ( max == 0 )
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{
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fprintf(stderr,"fatal: max frames must be higher than zero.\n");
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return 4;
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}
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if ( argc > 4 ) sscanf(argv[4],"%u",&sk);
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if ( sk == 0 )
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{
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fprintf(stderr,"fatal: frame step must be higher than zero.\n");
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return 8;
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}
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if ( argc > 5 ) sscanf(argv[5],"%u",&mdl);
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if ( argc > 6 ) sscanf(argv[6],"%c",&f);
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if ( (f < 'A') || (f > 'Z') )
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{
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fprintf(stderr,"fatal: first sprite frame must be between A and Z (inclusive).\n");
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return 16;
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}
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for ( unsigned i=0; i<max; i+=sk )
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{
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if ( !advance_frame() )
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{
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fprintf(stderr,"fatal: ran out of sprite names. please be reasonable.\n");
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return 32;
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}
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}
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return 0;
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}
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