SparrowOSTS_121127.ISO

SparrowOS/Demo/GameStarters/Halogen.CPP

@@ -0,0 +1,163 @@
+#define NUM_ROAD	512
+#define ROAD_WIDTH_BY_2	200
+#define CAR_WIDTH_BY_2	100
+
+I64 road_x[NUM_ROAD],road_trend;
+F64 speed,distance;
+I64 road_ptr=0,car_x;
+F64 t_last;
+Bool crash;
+
+U0 DrawIt(CTask *task,CDC *dc)
+{
+  I64 h=task->win_pixel_width,v=task->win_pixel_height;
+  I64 i,x,y,xx;
+  Bool old_preempt=Preempt(OFF);
+  xx=h>>1-car_x+road_x[road_ptr&(NUM_ROAD-1)];
+
+  task->text_attr=BLACK+BLACK<<4;
+  dc->color=LTGRAY;
+  for (i=0;i<NUM_ROAD;i++) {
+    x=h>>1-car_x+road_x[(i+road_ptr)&(NUM_ROAD-1)];
+    y=v-0.5*i;
+    if (y<v/2) break;
+    GrPlot(dc,x+ROAD_WIDTH_BY_2-0.4*i,y);
+    GrPlot(dc,x-ROAD_WIDTH_BY_2+0.4*i,y);
+  }
+  dc->color=WHITE;
+ 
+  x=h>>1-CAR_WIDTH_BY_2;
+  if (x<xx-ROAD_WIDTH_BY_2)
+    crash=TRUE;
+  GrLine(dc,x-10,v,x-40,v-100);
+  GrLine(dc,x+10,v,x+40,v-100);
+
+  x=h>>1+CAR_WIDTH_BY_2;
+  if (x>xx+ROAD_WIDTH_BY_2)
+    crash=TRUE;
+  GrLine(dc,x-10,v,x-40,v-100);
+  GrLine(dc,x+10,v,x+40,v-100);
+
+  dc->color=YELLOW;
+  if (crash)
+    GrPutS(dc,h>>1-FONT_WIDTH*4,(v-FONT_HEIGHT)>>1,"Game Over");
+  Preempt(old_preempt);
+}
+
+U0 UpdateRoad()
+{
+  F64 t0=tP;
+  distance+=speed*(t0-t_last);
+  t_last=t0;
+  while (distance>1.0) {
+    road_trend=LimitI64(road_trend+SignI64(RandU16%3-1),-5,5);
+    road_x[road_ptr&(NUM_ROAD-1)]=
+      road_x[(road_ptr-1)&(NUM_ROAD-1)]+=road_trend/3;
+    road_ptr++;
+    distance-=1.0;
+  }
+}
+
+U0 Init()
+{
+  I64 i,x=0;
+  speed=0;
+  distance=0;
+  road_trend=0;
+  road_ptr=0;
+  car_x=0;
+  for (i=0;i<NUM_ROAD;i++) {
+    road_x[i]=x;
+    road_trend=LimitI64(road_trend+SignI64(RandU16%3-1),-5,5);
+    x+=road_trend/3;
+  }
+  t_last=tP;
+  crash=FALSE;
+}
+
+
+U0 Halogen()
+{
+  I64 p1,p2,ch=0,sc=0;
+  SettingsPush; //See $LK,"SettingsPush","MN:SettingsPush"$
+  MenuPush(
+  "File {"
+  "  Abort(,CH_SHIFT_ESC);"
+  "  Exit(,CH_ESC);"
+  "}"
+  "Play {"
+  "  Restart(,CH_NEW_LINE);"
+  "  Accelerate(,,SC_CURSOR_UP);"
+  "  Deccellerate(,,SC_CURSOR_DOWN);"
+  "  Left(,,SC_CURSOR_LEFT);"
+  "  Right(,,SC_CURSOR_RIGHT);"
+      "}"
+      );
+  Preempt(OFF);
+  WordStat;
+  WinMax;
+  Init;
+  DocCursor;
+  DocClear;
+  Fs->draw_it=&DrawIt;
+  try {
+    while (TRUE) {
+      switch (ScanMsg(&p1,&p2,1<<MSG_KEY_DOWN|1<<MSG_KEY_UP)) {
+	case MSG_KEY_DOWN:
+	  ch=p1;sc=p2;
+	  switch (ch) {
+	    case CH_NEW_LINE:
+	      Init;
+	      break;
+	    case CH_ESC:
+	    case CH_SHIFT_ESC:
+	      goto ha_done;
+	  }
+	  break;
+	case MSG_KEY_UP:
+	  ch=p1;sc=p2;
+	  if (!ch)
+	    switch (sc.u8[0]) {
+	      case SC_CURSOR_RIGHT:
+	      case SC_CURSOR_LEFT:
+	      case SC_CURSOR_UP:
+	      case SC_CURSOR_DOWN:
+		sc=0;
+		break;
+	    }
+	  break;
+      }
+      switch (sc.u8[0]) {
+	case SC_CURSOR_RIGHT:
+	  car_x++;
+	  break;
+	case SC_CURSOR_LEFT:
+	  car_x--;
+	  break;
+	case SC_CURSOR_UP:
+	  if (++speed>200) speed=200;
+	  break;
+	case SC_CURSOR_DOWN:
+	  if (--speed<0) speed=0;
+	  break;
+      }
+      if (crash)
+	Snd(0);
+      else {
+	if (speed)
+	  Snd(speed+10);
+	else
+	  Snd(0);
+	UpdateRoad;
+      }
+      Sleep(10);
+    }
+ha_done:
+    GetMsg(,,1<<MSG_KEY_UP);
+  } catch
+    CatchAll;
+  MenuPop;
+  SettingsPop;
+}
+
+Halogen;