1 files changed, 40 insertions, 0 deletions
diff --git a/src/elements/bcln.cpp b/src/elements/bcln.cpp
new file mode 100644
index 0000000..8c00f95
--- /dev/null
+++ b/src/elements/bcln.cpp
@@ -0,0 +1,40 @@
+#include "element.h"
+
+int update_BCLN(UPDATE_FUNC_ARGS) {
+	if (!parts[i].life && sim->pv[y/CELL][x/CELL]>4.0f)
+		parts[i].life = rand()%40+80;
+	if (parts[i].life)
+	{
+		float advection = 0.1f;
+		parts[i].vx += advection*sim->vx[y/CELL][x/CELL];
+		parts[i].vy += advection*sim->vy[y/CELL][x/CELL];
+	}
+	if (parts[i].ctype<=0 || parts[i].ctype>=PT_NUM || (parts[i].ctype==PT_LIFE && (parts[i].tmp<0 || parts[i].tmp>=NGOLALT)))
+	{
+		int r, rx, ry;
+		for (rx=-1; rx<2; rx++)
+			for (ry=-1; ry<2; ry++)
+				if (x+rx>=0 && y+ry>=0 && x+rx<XRES && y+ry<YRES)
+				{
+					r = sim->photons[y+ry][x+rx];
+					if (!r)
+						r = pmap[y+ry][x+rx];
+					if (!r)
+						continue;
+					if ((r&0xFF)!=PT_CLNE && (r&0xFF)!=PT_PCLN &&
+				        (r&0xFF)!=PT_BCLN && (r&0xFF)!=PT_STKM &&
+				        (r&0xFF)!=PT_STKM2 && (r&0xFF)!=PT_PBCN &&
+				        (r&0xFF)<PT_NUM)
+					{
+						parts[i].ctype = r&0xFF;
+						if ((r&0xFF)==PT_LIFE)
+							parts[i].tmp = parts[r>>8].ctype;
+					}
+				}
+	}
+	else {
+		if (parts[i].ctype==PT_LIFE) sim->create_part(-1, x+rand()%3-1, y+rand()%3-1, parts[i].ctype|(parts[i].tmp<<8));
+		else sim->create_part(-1, x+rand()%3-1, y+rand()%3-1, parts[i].ctype);
+	}
+	return 0;
+}