From 0e57d70b95dd9f035d8eb261d38689d9901090a5 Mon Sep 17 00:00:00 2001
From: LJ Sonic <lamr@free.fr>
Date: Sun, 17 Mar 2024 00:41:38 +0100
Subject: [PATCH] Automatically mirror long sprites for missing rotations
---
src/r_things.c | 35 +++++++++++++++++++++++++++++++++++
1 file changed, 35 insertions(+)
diff --git a/src/r_things.c b/src/r_things.c
index bda754dba..5c4698e5d 100644
--- a/src/r_things.c
+++ b/src/r_things.c
@@ -312,6 +312,38 @@ static boolean GetFramesAndRotationsFromLongLumpName(
return true;
}
+static UINT8 GetOppositeRotation(UINT8 rotation, UINT8 flags)
+{
+ if (flags & ~SRF_3DMASK)
+ I_Error("GetOppositeRotation: rotation type not supported");
+
+ UINT8 numrotations = (flags == SRF_3D) ? 8 : 16;
+ return (rotation == 1) ? 1 : numrotations + 2 - rotation;
+}
+
+static void MirrorMissingRotations(void)
+{
+ for (UINT32 framenum = 0; framenum < maxframe; framenum++)
+ {
+ spriteframe_t *frame = &sprtemp[framenum];
+
+ if (!(frame->rotate & SRF_3DMASK))
+ continue;
+
+ UINT8 numrotations = frame->rotate == SRF_3D ? 8 : 16;
+
+ for (UINT8 rotation = 1; rotation <= numrotations; rotation++)
+ {
+ if (frame->lumppat[rotation - 1] != LUMPERROR)
+ continue;
+
+ UINT8 baserotation = GetOppositeRotation(rotation, frame->rotate);
+ UINT32 lumpnum = frame->lumppat[baserotation - 1];
+ R_InstallSpriteLump(WADFILENUM(lumpnum), LUMPNUM(lumpnum), frame->lumpid[baserotation], framenum, rotation, 1);
+ }
+ }
+}
+
// Some checks to help development
static void CheckFrame(const char *sprname)
{
@@ -484,6 +516,9 @@ boolean R_AddSingleSpriteDef(const char *sprname, spritedef_t *spritedef, UINT16
maxframe++;
+ if (longname)
+ MirrorMissingRotations();
+
CheckFrame(sprname);
// allocate space for the frames present and copy sprtemp to it