Bug#775530: rott: no fog on level Foggy Mountain

[Fabian Greffrath]

Am Dienstag, den 20.01.2015, 07:13 +0100 schrieb Alexandre Detiste: 
> It's easy to spot when both native rott & dosbox rott.exe are
> run windowed side by side.

Can you confirm that ROTT renders fog as intended with the attached
patch, even at high resolutions?

While creating the patch I have realized that the sky and the weapon
sprite are completely out of scale at high resolutions. Should I fix
that or have people got used to it?

- Fabian

diff --git a/rott/rt_draw.c b/rott/rt_draw.c
index 74b12f4..22f8ef9 100644
--- a/rott/rt_draw.c
+++ b/rott/rt_draw.c
@@ -1637,6 +1637,7 @@ void SetSpriteLightLevel (int x, int y, visobj_t * sprite, int dir, int fullbrig
    if (fog)
       {
       i=(sprite->viewheight>>normalshade)+minshade;
+      i = (i * 200) / iGLOBAL_SCREENHEIGHT;
       if (i>maxshade) i=maxshade;
       sprite->colormap=colormap+(i<<8);
       }
@@ -1698,6 +1699,7 @@ void SetColorLightLevel (int x, int y, visobj_t * sprite, int dir, int color, in
    if (fog)
       {
       i=(height>>normalshade)+minshade;
+      i = (i * 200) / iGLOBAL_SCREENHEIGHT;
       if (i>maxshade) i=maxshade;
       sprite->colormap=map+(i<<8);
       }
@@ -1793,6 +1795,7 @@ void SetWallLightLevel (wallcast_t * post)
    if (fog)
       {
       i =(post->wallheight>>normalshade)+minshade-lv+la;
+      i = (i * 200) / iGLOBAL_SCREENHEIGHT;
       if (i>maxshade+la) i=maxshade+la;
       shadingtable=colormap+(i<<8);
       }
diff --git a/rott/rt_floor.c b/rott/rt_floor.c
index 026e160..83ba48e 100644
--- a/rott/rt_floor.c
+++ b/rott/rt_floor.c
@@ -528,6 +528,7 @@ void SetFCLightLevel (int height)
    if (fog)
       {
       i=(height>>normalshade)+minshade;
+      i = (i * 200) / iGLOBAL_SCREENHEIGHT;
       if (i>maxshade) i=maxshade;
       shadingtable=colormap+(i<<8);
       }
diff --git a/rott/rt_scale.c b/rott/rt_scale.c
index ff4d839..267d043 100644
--- a/rott/rt_scale.c
+++ b/rott/rt_scale.c
@@ -150,6 +150,7 @@ void SetLightLevel (int height)
    if (fog)
       {
       i=(height>>normalshade)+minshade;
+      i = (i * 200) / iGLOBAL_SCREENHEIGHT;
       if (i>maxshade) i=maxshade;
       shadingtable=colormap+(i<<8);
       }