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Message-ID: <B99106EB40C104909D08CF9CECD7EAFB@antares-labs.eu>
Date: Sat, 31 Jul 2021 15:42:20 +0200
From: rgl@antares-labs.eu
To: 9front@9front.org
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	boundary="upas-xwzqiyuogyxwnntqpnylkxdqjf"
List-ID: <9front.9front.org>
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X-Bullshit: ISO-certified asynchronous API GPU solution 
Subject: [9front] brought swar from 1ed sources
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hi there folks,

i ported games/swar to use libdraw instead of libg. the
gameplay is... funny? it reminds me of one of those
early LCD pocket consoles where you could see each
sprite of the animation on the screen.

i also fixed enough to make it work after resizing
the window, and corrected the rendering to clear the
screen and draw the latest state. it seems the jerq
didn't have a framebuffer from which to pull the latest
image or didn't mind refreshing it, so you had to
constantly blit it all.


is it OK if it push it?


-rodri

--upas-xwzqiyuogyxwnntqpnylkxdqjf
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--- /tmp/plan9front/.git/fs/object/edfc72b500999863c2adbe29d6677577c3d62122/tree/sys/src/games/mkfile
+++ sys/src/games/mkfile
@@ -46,6 +46,7 @@
 	snes\
 	sokoban\
 	sudoku\
+	swar\
 	timmy\
 	v8e\
 
--- /tmp/diff100000364079
+++ sys/src/games/swar/accel.h
@@ -1,0 +1,16 @@
+512, 0,
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--- /tmp/diff100000364082
+++ sys/src/games/swar/boom.icon
@@ -1,0 +1,67 @@
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--- /tmp/diff100000364085
+++ sys/src/games/swar/deathstar.icon
@@ -1,0 +1,16 @@
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+++ sys/src/games/swar/missile.icon
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--- /tmp/diff100000364091
+++ sys/src/games/swar/mkfile
@@ -1,0 +1,10 @@
+</$objtype/mkfile
+
+BIN=/$objtype/bin/games
+TARG=swar
+OFILES=\
+	swar.$O\
+
+HFILES=player0.icon player1.icon accel.h missile.icon deathstar.icon boom.icon
+
+</sys/src/cmd/mkone
--- /tmp/diff100000364094
+++ sys/src/games/swar/player0.icon
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+++ sys/src/games/swar/player1.icon
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+". . . . . . . . x . .   . . . . . . . . . . x   x x x . . . . . . . .   x x x . . . . . . . .",
+". . . . . . . x x . x   x x x . . . . . . . x   . x x x . . . . . . .   x . x x . . . . . . .",
+". . . . . . x x x . x   . x x x x . . x x x x   x . x x x . . . . . .   x x . x x . . . . . .",
+". x x x x x x x x . x   x . . x x x x x x x x   x x . x x x x x x . .   x x . x x . . . . . .",
+"x x x x x x x x x x .   x x x . . x x x x x .   x x x . x x x x x x .   . x x . x x . . . . .",
+". . . . . . . . x x .   . x x x x . . x x . .   . x x x . x x x x . .   . x x . x x x x x . .",
+"x x x x x x x x x x .   . . . x x x x x x x .   . . x x x . x x . . .   . . x x . x x x x x .",
+". x x x x x x x x . .   . . . . x x x x x . .   . . x x x x x x . . .   . . x x . x x x x x .",
+". . . . . . x x x . .   . . . . x x x x x . .   . . x x x x x . . . .   . x x x x x x x . . .",
+". . . . . . . x x . .   . . . . x x x . . . .   . . x x x . . . . . .   . x x x x x x x . . .",
+". . . . . . . . x . .   . . . . . x x . . . .   . . . x . . . . . . .   . x x x . x . . . . .",
+
+". . . . x . . . . . .   . . . . . . x x x . .   . . . . . . x x x x .   . . . . . . . . . . .",
+". . . x . x . . . . .   . . . . . x x . x . .   . . . . . x x x . x .   . . . . . . x x x x .",
+". . x x . x x . . . .   . . . . x x . x x . .   . . . . x x x . x x x   x x . . x x x x . x .",
+". . x x . x x . . . .   . . . . x x . x x . .   x x x x x x . x x x x   x x x x x x . . x x .",
+". . x x . x x . . . .   . . . x x . x x . . x   x x x x x . x x x . x   x x x x . . x x x . .",
+". . x x . x x . . . .   x x x x x . x x . . .   x x x x . x x x . . .   x x . . x x x x . . .",
+". . x x . x x . . . x   x x x x . x x . . . .   . x x . x x x . . . x   x x x x x x . . . . .",
+". x x x . x x x . . x   x x x x . x x . . . .   . x x x x x x . . . .   x x x x x . . . . . .",
+"x x x x . x x x x . .   . x x x x x x x . . .   . . x x x x x . . . .   x x x x x . . . . . .",
+"x x x x x x x x x x .   . x x x x x x x . . .   . . . . x x x . . . .   . . x x x . . . . . .",
+". . . x x x . . . . .   . . . x . x x x . . .   . . . . . x . . . . .   . . x x . . . . . . .",
--- /tmp/diff100000364100
+++ sys/src/games/swar/swar.c
@@ -1,0 +1,430 @@
+/*
+ * swar -- jerq space war
+ * td&rob 84.01.01
+ *
+ * ported to 9front on 31jul2021
+ */
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+#include <event.h>
+int xc, yc;
+#define	NOBJ	(1+2+6*2)
+#define	MSPEED	(V/32)				/* speed of missile relative to ship */
+#define	SZ	512				/* maximum scaled coordinate */
+#define	V	256				/* velocity scale factor */
+#define	G	(V*11585)			/* 11585 is SZ**(3./2.) */
+#define	ALIVE	1
+#define	DEAD	2
+#define	SUN	3
+#define	BOOM	4
+#define	HYPER	5
+#define	SLEEP	40				/* ms per iteration */
+#define	TUBA	(2000/SLEEP)			/* iterations until born again */
+#define	HYTIME	((600+rand()%600)/SLEEP)	/* iterations in hyperspace */
+char *starbits[]={
+#include "deathstar.icon"
+};
+Image *stardwg;
+Rectangle starrect={0, 0, 16, 16};
+char *p0bits[]={
+#include "player0.icon"
+};
+Image *p0dwg;
+Rectangle p0rect={0, 0, 44, 44};
+char *p1bits[]={
+#include "player1.icon"
+};
+Image *p1dwg;
+Rectangle p1rect={0, 0, 44, 44};
+char *misbits[]={
+#include "missile.icon"
+};
+Image *misdwg;
+Rectangle misrect={0, 0, 32, 32};
+char *boombits[]={
+#include "boom.icon"
+};
+Image *boomdwg;
+Rectangle boomrect={0, 0, 64, 64};
+struct obj{
+	int x, y;
+	int vx, vy;		/* scaled by V */
+	int orientation;
+	int state;
+	int diameter;
+	Image *bp;
+	int curdwg;
+#define	wrapped	timer
+	int timer;
+}obj[NOBJ], iobj[]={
+	{0, 0, 0, 0, 0, SUN, 16},
+	{ 300, 0, 0,  5*V, 8, ALIVE, 11, 0, 0, TUBA},
+	{-300, 0, 0, -5*V, 0, ALIVE, 11, 0, 0, TUBA},
+	{0, 0, 0, 0, 0, ALIVE, 8},
+};
+#define	ATT	(&obj[0])
+#define	P0	(&obj[1])
+#define	P1	(&obj[2])
+int score[3];
+#define	NORIENTATION	16
+struct dv{
+	int x, y;
+}dv[NORIENTATION]={
+#include "accel.h"
+};
+
+int xc, yc, size;
+void kbdplayer(int c);
+void hyper(struct obj *o);
+void right(struct obj *o);
+void left(struct obj *o);
+void jerk(struct obj *o);
+int isqrt(int x);
+void fire(struct obj *o);
+void initobj(struct obj *o);
+void deathto(struct obj *o, int doboom);
+void boom(struct obj *o);
+void shards(struct obj *o);
+void move(struct obj *o);
+void blot(struct obj *o, int dwg);
+void collide(struct obj *o, struct obj *p);
+void newscore(struct obj *o, struct obj *p);
+void drawscore(char *str, int sc, int where);
+void doscore(void);
+Image *initbitmap(char *bits[], Rectangle r);
+
+#define	sq(x)	((x)*(x))
+#define	muldiv(a, b, c)	((a)*(b)/(c))
+
+int
+min(int a, int b)
+{
+	return a<b? a: b;
+}
+
+int
+abs(int a)
+{
+	return a<0? -a: a;
+}
+
+void
+redraw(void)
+{
+	draw(screen, screen->r, display->black, nil, ZP);
+	blot(ATT, ATT->orientation);
+	doscore();
+}
+
+void
+eresized(int)
+{
+	if(getwindow(display, Refnone) < 0)
+		sysfatal("resized");
+	xc=(screen->r.min.x+screen->r.max.x)/2;
+	yc=(screen->r.min.y+screen->r.max.y)/2;
+	size=min(screen->r.max.x-screen->r.min.x,
+		screen->r.max.y-screen->r.min.y)/2;
+	redraw();
+}
+
+void
+main(void)
+{
+	struct obj *o, *p;
+
+	initdraw(nil,nil,nil);
+	einit(Ekeyboard|Emouse);
+
+	iobj[0].bp = stardwg = initbitmap(starbits, starrect);
+	iobj[1].bp = p0dwg = initbitmap(p0bits, p0rect);
+	iobj[2].bp = p1dwg = initbitmap(p1bits, p1rect);
+	iobj[3].bp = misdwg = initbitmap(misbits, misrect);
+	boomdwg = initbitmap(boombits, boomrect);
+
+	xc=(screen->r.min.x+screen->r.max.x)/2;
+	yc=(screen->r.min.y+screen->r.max.y)/2;
+	size=min(screen->r.max.x-screen->r.min.x,
+		screen->r.max.y-screen->r.min.y)/2;
+
+	for(o=obj;o<=P1;o++)
+		initobj(o);
+
+	for(;o!=&obj[NOBJ];o++)
+		o->state=DEAD;
+
+	for(;;){
+		redraw();
+		for(o=obj;o!=&obj[NOBJ];o++){
+			switch(o->state){
+			case ALIVE:
+			case SUN:
+				for(p=o+1;p!=&obj[NOBJ];p++)
+					if(p->state!=DEAD)
+						collide(o, p);
+				if(o>P1)
+					left(o);
+				move(o);
+				break;
+			case HYPER:
+				if(--o->timer==0){
+					blot(o, o->curdwg);
+					o->state=ALIVE;
+					if(rand()%4==0){
+						deathto(o, 1);
+						newscore(ATT, o);
+					}
+				}else
+					move(o);
+				break;
+			case DEAD:
+				if((o==P0 || o==P1) && --o->timer==0)
+					initobj(o);
+				break;
+			case BOOM:
+				shards(o);
+				move(o);
+				break;
+			}
+		}
+		flushimage(display, 1);
+		while(ecanmouse()) emouse();
+		if(ecankbd()) kbdplayer(ekbd());
+		sleep(SLEEP);
+	}
+}
+void kbdplayer(int c){
+	switch(c){
+	case 'k': left(P0);	break;
+	case 'o': jerk(P0);	break;
+	case ';': right(P0);	break;
+	case 'l': fire(P0);	break;
+	case '.':
+	case ',': hyper(P0);	break;
+	case 'a': left(P1);	break;
+	case 'w': jerk(P1);	break;
+	case 'd': right(P1);	break;
+	case 's': fire(P1);	break;
+	case 'z':
+	case 'x': hyper(P1);	break;
+	case 'Q': exits("");	break;
+	}
+}
+void hyper(struct obj *o){
+	if(o->state!=ALIVE)
+		return;
+	o->state=HYPER;
+	o->timer=HYTIME;
+	blot(o, o->curdwg);
+}
+void right(struct obj *o){
+	if(++o->orientation==NORIENTATION)
+		o->orientation=0;
+}
+void left(struct obj *o){
+	if(--o->orientation<0)
+		o->orientation=NORIENTATION-1;
+}
+void jerk(struct obj *o){
+	o->vx+=dv[o->orientation].x/2;
+	o->vy+=dv[o->orientation].y/2;
+}
+int isqrt(int x){
+	int s, u;
+	if(x<=0)
+		return(0);
+	if(x>=32768L*(32768L/4))
+		return(2*isqrt(x/4));	/* avoid overflow */
+	for(s=2, u=4;u<x;s+=s, u*=4);
+	while((u=((x+s*s)/s)>>1)<s)
+		s=u;
+	return(s);
+}
+void fire(struct obj *o){
+	struct obj *m;
+	int vx, vy, vl;
+	if(o->state!=ALIVE)
+		return;
+	for(m=o+2;m<&obj[NOBJ];m+=2)
+		if(m->state==DEAD){
+			initobj(m);
+			m->state=ALIVE;
+			vl=isqrt(sq(o->vx)+sq(o->vy));
+			if(vl==0)
+				vl=V;
+			vx=muldiv(vl, dv[o->orientation].x, V);
+			vy=muldiv(vl, dv[o->orientation].y, V);
+			m->x=o->x+muldiv(vx, (o->diameter+m->diameter), vl);
+			m->y=o->y+muldiv(vy, (o->diameter+m->diameter), vl);
+			m->vx=o->vx+MSPEED*dv[o->orientation].x;
+			m->vy=o->vy+MSPEED*dv[o->orientation].y;
+			blot(m, m->orientation);
+			return;
+		}
+}
+void initobj(struct obj *o){
+	*o=(o>P1)?iobj[P1-obj+1]:iobj[o-obj];
+	if(o<=P1)
+		blot(o, o->orientation);
+}
+void deathto(struct obj *o, int doboom){
+	o->state=DEAD;
+	blot(o, o->curdwg);
+	if(doboom)
+		boom(o);
+}
+void boom(struct obj *o){
+	o->state=BOOM;
+	o->bp=boomdwg;
+	o->diameter=boomdwg->r.max.x/4;
+	blot(o, o->orientation=0);
+}
+void shards(struct obj *o){
+	if(++o->orientation==16){
+		blot(o, o->curdwg);
+		o->state=DEAD;
+		o->timer=TUBA;
+	}
+}
+void move(struct obj *o){
+	int r32;
+	int x, y;
+	if(o->state==DEAD || o->state==SUN)
+		return;
+	r32=o->x*o->x+o->y*o->y;
+	if(r32!=0){
+		r32*=isqrt(r32);	/* pow(r, 3./2.) */
+		if(r32!=0){
+			o->vx-=G*o->x/r32;
+			o->vy-=G*o->y/r32;
+		}
+	}
+	x=o->x+o->vx/V;
+	y=o->y+o->vy/V;
+	if(x<-SZ || SZ<x){
+		if(o>P1 && o->wrapped){
+    Death:
+			deathto(o, 0);
+			return;
+		}
+		if(x<-SZ) x+=2*SZ; else x-=2*SZ;
+		o->wrapped++;
+	}
+	if(y<-SZ || SZ<y){
+		if(o>P1 && o->wrapped)
+			goto Death;
+		if(y<-SZ) y+=2*SZ; else y-=2*SZ;
+		o->wrapped++;
+	}
+	if(o->state!=HYPER)
+		blot(o, o->curdwg);
+	o->x=x, o->y=y;
+	if(o->state!=HYPER)
+		blot(o, o->orientation);
+}
+
+#define	BLOTSIZE	5
+#define	rescale(x)	muldiv(x, size, SZ)
+
+void
+blot(struct obj *o, int dwg)
+{
+	Point p;
+	int dx = dwg % 4*o->diameter, dy = dwg / 4*o->diameter;
+
+	p = Pt(rescale(o->x)+xc-o->diameter/2, rescale(o->y)+yc-o->diameter/2);
+
+	draw(screen, rectaddpt(Rect(dx,dy,dx+o->diameter,dy+o->diameter),p), o->bp, nil, Pt(dx, dy));
+	o->curdwg = dwg;
+}
+
+void
+collide(struct obj *o, struct obj *p)
+{
+	int doneboom;
+	/* o<p always */
+	if(o->state!=HYPER && p->state!=HYPER
+	&& sq(rescale(o->x-p->x))+sq(rescale(o->y-p->y))<
+		sq(o->diameter+p->diameter)/4){
+		newscore(o, p);
+		if(doneboom=o->state==ALIVE)
+			deathto(o, 1);
+		if(p->state==ALIVE)
+			deathto(p, !doneboom || (o==P0 && p==P1));
+	}
+}
+
+void
+newscore(struct obj *o, struct obj *p)
+{
+	doscore();
+	/* o<p always */
+	score[2]++;
+	if(o==P0 || p==P0)
+		score[1]++;
+	if(o==P1 || p==P1)
+		score[0]++;
+	doscore();
+}
+
+void
+drawscore(char *str, int sc, int where)
+{
+	static char buf[16];
+	char *p = buf+6;
+	int s;
+
+	while(*p++=*str++)
+		;
+
+	p = buf+6;
+	s = abs(sc);
+	do{
+		*--p = s%10 + '0';
+		s /= 10;
+	}while(s);
+
+	if(sc < 0)
+		*--p = '-';
+
+	if(where == 2)
+		s = screen->r.min.x + 20;
+	else if(where == 1)
+		s = (screen->r.min.x + screen->r.max.x - stringwidth(font, p))/2;
+	else
+		s = screen->r.max.x - stringwidth(font, p) - 20;
+
+	draw(screen, Rpt(Pt(s, screen->r.min.y+5),Pt(s+stringwidth(font, p), screen->r.min.y+5+font->height)), display->black, nil, ZP);
+	string(screen, Pt(s, screen->r.min.y+5), display->white, ZP, font, p);
+}
+
+void
+doscore(void)
+{
+	drawscore(" MCI", score[0], 0);
+	drawscore(" AT&T", score[2], 1);
+	drawscore(" SPRINT", score[1], 2);
+}
+
+Image *
+initbitmap(char *bits[], Rectangle r)
+{
+	Point p;
+	char *bit;
+	Image *b=allocimage(display, r, screen->chan, 0, DTransparent);
+
+	if(b==0)
+		sysfatal("allocimage: %r");
+
+	for(p.y = r.min.y; p.y != r.max.y; p.y++){
+		bit = bits[p.y-r.min.y];
+		for(p.x = r.min.x; p.x != r.max.x; p.x++){
+			while(*bit==' ')
+				bit++;
+			if(*bit++=='x')
+				draw(b, Rpt(p,addpt(p,Pt(1,1))), display->white, nil, ZP);
+		}
+	}
+	return b;
+}
--upas-xwzqiyuogyxwnntqpnylkxdqjf--