From 3702438482785414076689bfb3b8ceeaaa1fbc3a Mon Sep 17 00:00:00 2001
From: jacksonmj <mj-pt@jacksonmj.co.uk>
Date: Sun, 19 Feb 2012 00:49:04 +0000
Subject: [PATCH] Prevent gaps in beams of photons from powered clone

---
 includes/powder.h   | 1 +
 src/elements/pbcn.c | 5 +++++
 src/elements/pcln.c | 5 +++++
 src/powder.c        | 6 ++++++
 4 files changed, 17 insertions(+)

diff --git a/includes/powder.h b/includes/powder.h
index f198ad735..3330bb396 100644
--- a/includes/powder.h
+++ b/includes/powder.h
@@ -249,6 +249,7 @@
 #define PROP_SPARKSETTLE	0x20000	//2^17 Allow Sparks/Embers to settle
 
 #define FLAG_STAGNANT	1
+#define FLAG_SKIPMOVE	0x2 // skip movement for one frame, only implemented for PHOT
 
 #define GRAPHICS_FUNC_ARGS particle *cpart, int nx, int ny, int *pixel_mode, int* cola, int *colr, int *colg, int *colb, int *firea, int *firer, int *fireg, int *fireb
 #define GRAPHICS_FUNC_SUBCALL_ARGS cpart, nx, ny, pixel_mode, cola, colr, colg, colb, firea, firer, fireg, fireb
diff --git a/src/elements/pbcn.c b/src/elements/pbcn.c
index 5fb361c1f..f8424fee4 100644
--- a/src/elements/pbcn.c
+++ b/src/elements/pbcn.c
@@ -69,6 +69,11 @@ int update_PBCN(UPDATE_FUNC_ARGS) {
 						{
 							parts[r].vx = rx*3;
 							parts[r].vy = ry*3;
+							if (r>i)
+							{
+								// Make sure movement doesn't happen until next frame, to avoid gaps in the beams of photons produced
+								parts[r].flags |= FLAG_SKIPMOVE;
+							}
 						}
 					}
 				}
diff --git a/src/elements/pcln.c b/src/elements/pcln.c
index 197263281..924ce7a8d 100644
--- a/src/elements/pcln.c
+++ b/src/elements/pcln.c
@@ -59,6 +59,11 @@ int update_PCLN(UPDATE_FUNC_ARGS) {
 						{
 							parts[r].vx = rx*3;
 							parts[r].vy = ry*3;
+							if (r>i)
+							{
+								// Make sure movement doesn't happen until next frame, to avoid gaps in the beams of photons produced
+								parts[r].flags |= FLAG_SKIPMOVE;
+							}
 						}
 					}
 				}
diff --git a/src/powder.c b/src/powder.c
index 2f427595f..c869e594c 100644
--- a/src/powder.c
+++ b/src/powder.c
@@ -2214,6 +2214,12 @@ killed:
 
 			if ((t==PT_PHOT||t==PT_NEUT||t==PT_ELEC)) {
 				if (t == PT_PHOT) {
+					if (parts[i].flags&FLAG_SKIPMOVE)
+					{
+						parts[i].flags &= ~FLAG_SKIPMOVE;
+						continue;
+					}
+
 					rt = pmap[fin_y][fin_x] & 0xFF;
 					lt = pmap[y][x] & 0xFF;