1 files changed, 30 insertions, 0 deletions
diff --git a/src/elements/swch.c b/src/elements/swch.c
new file mode 100644
index 0000000..a57f70c
--- /dev/null
+++ b/src/elements/swch.c
@@ -0,0 +1,30 @@
+#include <powder.h>
+
+int update_SWCH(UPDATE_FUNC_ARGS) {
+	int r, rt;
+	for (nx=-2; nx<3; nx++)
+		for (ny=-2; ny<3; ny++)
+			if (x+nx>=0 && y+ny>0 &&
+			        x+nx<XRES && y+ny<YRES && (nx || ny))
+			{
+				r = pmap[y+ny][x+nx];
+				if ((r>>8)>=NPART || !r)
+					continue;
+				if (parts_avg(i,r>>8,PT_INSL)!=PT_INSL) {
+					rt = parts[r>>8].type; // not r&0xFF because pmap is not yet always updated (TODO)
+					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) {
+						parts[i].type = PT_SPRK;
+						parts[i].ctype = PT_SWCH;
+						parts[i].life = 4;
+					}
+				}
+			}
+	return 0;
+}