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gr-sim: more dot changes

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This commit is contained in:
Vince Weaver 2023-11-25 00:39:47 -05:00
parent 0c81be5e23
commit 59e302544b
1 changed files with 13 additions and 63 deletions
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76
utils/gr-sim/dots/dots_minimal.c
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@ -30,10 +30,6 @@ static struct {
short x; // 0
short y; // 2
short z; // 4
short old1; // 6 oldpos shadow
short old2; // 8 oldpos
short old3; // 10
short old4; // 12
short yadd; // 14
} dot[MAXDOTS];
@ -44,11 +40,11 @@ static void drawdots(void) {
int temp32;
int yy;
cx=dotnum; // mov cx,cs:_dotnum
si=0; // mov si,OFFSET dot
// cx=dotnum; // mov cx,cs:_dotnum
// si=0; // mov si,OFFSET dot
label1:
push(cx); // push cx
for(si=0;si<512;si+=SKIP) {
// push(cx); // push cx
ax=dot[si].x; // mov ax,ds:[si+0] ;X
imul_16(rotsin); // imul ds:_rotsin
ax=ax; // mov ax,ax
@ -117,7 +113,7 @@ label1:
push(ax); // push ax
/* draw new shadow (?) */
/* draw shadow */
// bx/320 -> 200 200->48 *48/200
@ -166,6 +162,7 @@ label4:
bx=rows[bx]; // mov bx,ds:_rows[bx]
ax=pop(); // pop ax
push(ax);
bx=bx+ax; // add bx,ax
bp=bp>>6; // shr bp,6
bp=bp&(~3L); // and bp,not 3
@ -185,32 +182,12 @@ label_t2:
yy=((bx/320)*48)/200;
color_equals(6);
plot( (bx%320)/8,yy);
cx=pop(); // pop cx
si=si+SKIP; // add si,16 point to next dot
cx=cx-SKIP;
if (cx!=0) goto label1; // loop @@1
label0:
return;
// @@0: CEND
label2:
/* This is called when we are off the screen */
/* erases old but didn't draw new */
bx=pop(); // pop bx
cx=pop(); // pop cx
si=si+SKIP; // add si,16
cx=cx-SKIP; // loop @@1
if (cx!=0) goto label1;
goto label0; // jmp @@0
label3:
bx=pop(); // pop bx
cx=pop(); // pop cx
si=si+SKIP; // add si,16
cx=cx-SKIP; // loop @@1
if (cx!=0) goto label1;
goto label0; // jmp @@0
}
return;
}
@ -225,9 +202,6 @@ static short dis_waitb(void) {
}
static char pal[768];
static char pal2[768];
static short isin(short deg) {
return(sin1024[deg&1023]);
}
@ -299,8 +273,9 @@ int main(int argc,char **argv) {
ram[DRAW_PAGE]=0;
while(frame<2450) {
while(frame<2360) {
/* re-draw background */
color_equals(0);
for(a=0;a<24;a++) hlin(0,0,40,a);
color_equals(5);
@ -308,6 +283,7 @@ int main(int argc,char **argv) {
frame++;
if(frame==500) f=0;
i=dottaul[j];
j++; j%=dotnum;
@ -341,32 +317,7 @@ int main(int argc,char **argv) {
dot[i].yadd=0;
if(frame>1900 && !(frame&31) && grav>0) grav--;
}
/* palette to white */
else if(frame<2400) {
a=frame-2360;
for(b=0;b<768;b+=3) {
c=pal[b+0]+a*3;
if(c>63) c=63;
pal2[b+0]=c;
c=pal[b+1]+a*3;
if(c>63) c=63;
pal2[b+1]=c;
c=pal[b+2]+a*4;
if(c>63) c=63;
pal2[b+2]=c;
}
}
/* palette to black */
else if(frame<2440) {
a=frame-2400;
for(b=0;b<768;b+=3) {
c=63-a*2;
if(c<0) c=0;
pal2[b+0]=c;
pal2[b+1]=c;
pal2[b+2]=c;
}
}
if(dropper>4000) dropper-=100;
rotcos=icos(rot)*64; rotsin=isin(rot)*64;
@ -382,7 +333,6 @@ int main(int argc,char **argv) {
gravity=grav;
gravityd=gravd;
drawdots();
grsim_update();