ref: bf70626bc39f4e2cf8e318423de5eeaeeaa79af5
parent: f17137ef1990270b3f6b46845e8c8ec80644f288
author: qwx <[email protected]>
date: Fri Aug 6 20:22:07 EDT 2021
fix crash with warped surfaces there are weird assumptions all over the place, but no idea why this is done that way. R_PolygonScanLeftEdge can process less spans than R_PolygonScanRightEdge which then works on uninitialized data and outputs garbage, but this somehow is necessary for these surfaces to render. this might still be a point of failure.
--- a/r_poly.c
+++ b/r_poly.c
@@ -591,7 +591,7 @@
do
{- s_spanletvars.pdest = (byte *)d_viewbuffer + ( d_scantable[pspan->v] /*r_screenwidth * pspan->v*/) + pspan->u;
+ s_spanletvars.pdest = (byte *)d_viewbuffer + r_screenwidth * pspan->v + pspan->u;
s_spanletvars.pz = d_pzbuffer + (d_zwidth * abs(pspan->v)) + pspan->u;
s_spanletvars.u = pspan->u;
s_spanletvars.v = pspan->v;