Begin cleanup of update functions

1 files changed, 77 insertions, 0 deletions

diff --git a/src/elements/legacy.c b/src/elements/legacy.c
new file mode 100644
index 0000000..70d4e99
--- /dev/null
+++ b/src/elements/legacy.c
@@ -0,0 +1,77 @@
+#include <powder.h>
+
+// Interactions which only occur when legacy_enable is on
+int update_legacy_all(UPDATE_FUNC_ARGS) {
+	if (!legacy_enable) return 0;
+	int r, rx, ry, rt;
+	int t = parts[i].type;
+	if (t==PT_WTRV) {
+		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 (((r&0xFF)==PT_WATR||(r&0xFF)==PT_DSTW||(r&0xFF)==PT_SLTW) && 1>(rand()%1000))
+					{
+						part_change_type(i,x,y,PT_WATR);
+						part_change_type(r>>8,x+rx,y+ry,PT_WATR);
+					}
+					if (((r&0xFF)==PT_ICEI || (r&0xFF)==PT_SNOW) && 1>(rand()%1000))
+					{
+						part_change_type(i,x,y,PT_WATR);
+						if (1>(rand()%1000))
+							part_change_type(r>>8,x+nx,y+ny,PT_WATR);
+					}
+				}
+	}
+	else if (t==PT_WATR) {
+		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 (((r&0xFF)==PT_FIRE || (r&0xFF)==PT_LAVA) && 1>(rand()%10))
+					{
+						part_change_type(i,x,y,PT_WTRV);
+					}
+				}
+	}
+	else if (t==PT_SLTW) {
+		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 (((r&0xFF)==PT_FIRE || (r&0xFF)==PT_LAVA) && 1>(rand()%10))
+					{
+						part_change_type(i,x,y,PT_SALT);
+						part_change_type(r>>8,x+rx,y+ry,PT_WTRV);
+					}
+				}
+	}
+	else if (t==PT_DSTW) {
+		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 (((r&0xFF)==PT_FIRE || (r&0xFF)==PT_LAVA) && 1>(rand()%10))
+					{
+						part_change_type(i,x,y,PT_WTRV);
+					}
+				}
+	}
+	return 0;
+}