graphics/sprites/animatedsprite/animatedsprite.c

/*---------------------------------------------------------------------------------


    animated sprite demo
    -- alekmaul


---------------------------------------------------------------------------------*/
#include "animatedsprite.h"

#include "gfxs.h"                                   // to add definition of graphics

//---------------------------------------------------------------------------------
// The NMI routine. Gets called 50 or 60 times per second 
// nothing to update for bitmap example
void nmi (void) {
    // update sprite display during nmi, if you enable sprites
    if (spr_enable)
        spr_update();
}

//---------------------------------------------------------------------------------
void main (void) {
    u8 xp,yp,idpac,tpo;
    u16 pattern;
    
    // Put screen in text mode 2
    vdp_disablescr();
    
    vdp_setmode2txt();
    
    // Put default char in VRAM and duplicate to all areas
    //  as we are going to write to line 10, it is in the second area
    vdp_setdefaultchar(FNTNORMAL);
    vdp_duplicatevram();
    vdp_fillvram(0x2000,0xf1,128*8);    // Change color (or we will see nothing)

    // Put sprite character
    vdp_putvram (sprtab,TILpacspritegfx,SZTILpacspritegfx); // sprite characters

    vdp_enablescr();
    
    // Put sprite in middle of screen with color light yellow, 0 because we have only one pattern (index 0)
    xp=8*16;yp=8*12;pattern=0;
    idpac=spr_getentry();
    spr_set(idpac,xp,yp,11,pattern);
    tpo=0;
    
    // enable sprite display
    spr_enable = 1;
    
    // Wait for nothing :P
    while(1) {
        if (joypad_1 & PAD_RIGHT) { 
            if (xp<(256-16)) { xp++; spr_setx(idpac,xp); } 
        }
        if (joypad_1 & PAD_LEFT)  { 
            if (xp>0) { xp--; spr_setx(idpac,xp); } 
        }
        if (joypad_1 & PAD_DOWN)  { 
            if (yp<(192-16)) {  yp++; spr_sety(idpac,yp); } 
        }
        if (joypad_1 & PAD_UP)    { 
            if (yp>0) { yp--; spr_sety(idpac,yp); } 
        }
        // manage sprite pattern with little tempo
        tpo++;
        if (tpo>3) {
            tpo=0;
            pattern+=4;
            if (pattern>4*3) pattern=0;
            spr_setpat(idpac,pattern);
        }

        // Wait Vblank
        vdp_waitvblank(1);
    }
    // startup module will issue a soft reboot if it comes here 
}