1 files changed, 33 insertions, 0 deletions
diff --git a/src/elements/bcln.c b/src/elements/bcln.c
new file mode 100644
index 0000000..3581fc2
--- /dev/null
+++ b/src/elements/bcln.c
@@ -0,0 +1,33 @@
+#include <element.h>
+
+int update_BCLN(UPDATE_FUNC_ARGS) {
+	if (!parts[i].life)
+	{
+		if (pv[y/CELL][x/CELL]>4.0f)
+		{
+			float advection = 0.1f;
+			parts[i].vx += advection*vx[y/CELL][x/CELL];
+			parts[i].vy += advection*vy[y/CELL][x/CELL];
+			parts[i].life = rand()%40+80;
+		}
+	}
+	if (!parts[i].ctype)
+	{
+		int 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 &&
+				        pmap[y+ry][x+rx] &&
+				        (pmap[y+ry][x+rx]&0xFF)!=PT_CLNE &&
+				        (pmap[y+ry][x+rx]&0xFF)!=PT_BCLN &&
+				        (pmap[y+ry][x+rx]&0xFF)!=PT_PCLN &&
+				        (pmap[y+ry][x+rx]&0xFF)!=PT_STKM &&
+				        (pmap[y+ry][x+rx]&0xFF)!=PT_STKM2 &&
+				        (pmap[y+ry][x+rx]&0xFF)!=0xFF)
+					parts[i].ctype = pmap[y+ry][x+rx]&0xFF;
+	}
+	else {
+		create_part(-1, x+rand()%3-1, y+rand()%3-1, parts[i].ctype);
+	}
+	return 0;
+}