From f5386a706f8383f07b14212af9a504865a62d4c7 Mon Sep 17 00:00:00 2001 From: Magnus Norddahl Date: Tue, 5 Jun 2018 20:09:02 +0200 Subject: [PATCH] - fix software renderer dynamic lights not working properly in mirrors --- src/swrenderer/line/r_walldraw.cpp | 7 ++++++- src/swrenderer/plane/r_flatplane.cpp | 10 +++++++++- 2 files changed, 15 insertions(+), 2 deletions(-) diff --git a/src/swrenderer/line/r_walldraw.cpp b/src/swrenderer/line/r_walldraw.cpp index 64f14135f4..92235ae344 100644 --- a/src/swrenderer/line/r_walldraw.cpp +++ b/src/swrenderer/line/r_walldraw.cpp @@ -189,7 +189,12 @@ namespace swrenderer { auto viewport = Thread->Viewport.get(); - drawerargs.dc_viewpos.X = (float)((x + 0.5 - viewport->CenterX) / viewport->CenterX * zcol); + int tx = x; + bool mirror = !!(Thread->Portal->MirrorFlags & RF_XFLIP); + if (mirror) + tx = viewwidth - tx - 1; + + drawerargs.dc_viewpos.X = (float)((tx + 0.5 - viewport->CenterX) / viewport->CenterX * zcol); drawerargs.dc_viewpos.Y = zcol; drawerargs.dc_viewpos.Z = (float)((viewport->CenterY - y1 - 0.5) / viewport->InvZtoScale * zcol); drawerargs.dc_viewpos_step.Z = (float)(-zcol / viewport->InvZtoScale); diff --git a/src/swrenderer/plane/r_flatplane.cpp b/src/swrenderer/plane/r_flatplane.cpp index 8d01205599..88b3871a6a 100644 --- a/src/swrenderer/plane/r_flatplane.cpp +++ b/src/swrenderer/plane/r_flatplane.cpp @@ -205,13 +205,21 @@ namespace swrenderer if (r_dynlights) { + int tx = x1; + bool mirror = !!(Thread->Portal->MirrorFlags & RF_XFLIP); + if (mirror) + tx = viewwidth - tx - 1; + // Find row position in view space float zspan = (float)(planeheight / (fabs(y + 0.5 - viewport->CenterY) / viewport->InvZtoScale)); - drawerargs.dc_viewpos.X = (float)((x1 + 0.5 - viewport->CenterX) / viewport->CenterX * zspan); + drawerargs.dc_viewpos.X = (float)((tx + 0.5 - viewport->CenterX) / viewport->CenterX * zspan); drawerargs.dc_viewpos.Y = zspan; drawerargs.dc_viewpos.Z = (float)((viewport->CenterY - y - 0.5) / viewport->InvZtoScale * zspan); drawerargs.dc_viewpos_step.X = (float)(zspan / viewport->CenterX); + if (mirror) + drawerargs.dc_viewpos_step.X = -drawerargs.dc_viewpos_step.X; + // Plane normal drawerargs.dc_normal.X = 0.0f; drawerargs.dc_normal.Y = 0.0f;