1 files changed, 37 insertions, 0 deletions
diff --git a/src/elements/swch.c b/src/elements/swch.c
new file mode 100644
index 0000000..043bf23
--- /dev/null
+++ b/src/elements/swch.c
@@ -0,0 +1,37 @@
+#include <element.h>
+
+int update_SWCH(UPDATE_FUNC_ARGS) {
+	int r, rt, rx, ry;
+	for (rx=-2; rx<3; rx++)
+		for (ry=-2; ry<3; ry++)
+			if (x+rx>=0 && y+ry>0 && x+rx<XRES && y+ry<YRES && (rx || ry))
+			{
+				r = pmap[y+ry][x+rx];
+				if ((r>>8)>=NPART || !r)
+					continue;
+				if (parts_avg(i,r>>8,PT_INSL)!=PT_INSL) {
+					rt = r&0xFF;
+					if (rt==PT_SWCH)
+					{
+						if (parts[i].life>=10&&parts[r>>8].life<10&&parts[r>>8].life>0)
+							parts[i].life = 9;
+						else if (parts[i].life==0&&parts[r>>8].life==10)
+							parts[i].life = 10;
+					}
+					else if (rt==PT_SPRK&&parts[i].life==10&&parts[r>>8].ctype!=PT_PSCN&&parts[r>>8].ctype!=PT_NSCN) {
+						part_change_type(i,x,y,PT_SPRK);
+						parts[i].ctype = PT_SWCH;
+						parts[i].life = 4;
+					}
+				}
+			}
+	if (parts[i].life==10 && (!(pmap[y-1][x-1]&0xFF) && ((pmap[y-1][x]&0xFF)==PT_BRAY&&parts[pmap[y-1][x]>>8].tmp==2) && !(pmap[y-1][x+1]&0xFF) && ((pmap[y][x+1]&0xFF)==PT_BRAY&&parts[pmap[y][x+1]>>8].tmp==2)))
+	{
+		parts[i].life = 9;
+	}
+	else if (parts[i].life<=5 && (!(pmap[y-1][x-1]&0xFF) && (((pmap[y-1][x]&0xFF)==PT_BRAY&&parts[pmap[y-1][x]>>8].tmp==2) || ((pmap[y+1][x]&0xFF)==PT_BRAY&&parts[pmap[y+1][x]>>8].tmp==2)) && !(pmap[y-1][x+1]&0xFF) && (((pmap[y][x+1]&0xFF)==PT_BRAY&&parts[pmap[y][x+1]>>8].tmp==2) || ((pmap[y][x-1]&0xFF)==PT_BRAY&&parts[pmap[y][x-1]>>8].tmp==2))))
+	{
+		parts[i].life = 14;
+	}
+	return 0;
+}