VideoSoftware: Implement fog range adjustment, fixing issue 6147.

dolphin-emu · Mar 25, 2013 · ae146e8 · ae146e8
1 parent d4fadf4
commit ae146e8
Show file tree

Hide file tree

Showing 2 changed files with 11 additions and 4 deletions.
diff --git a/Source/Core/VideoCommon/Src/BPMemory.h b/Source/Core/VideoCommon/Src/BPMemory.h
@@ -686,6 +686,8 @@ union FogRangeKElement
 		u32 LO : 12;
 		u32 regid : 8;
 	};
+	// TODO: Which scaling coefficient should we use here? This is just a guess!
+	float GetValue(int i) { return (i ? HI : LO) / 32.f; }
 	u32 HEX;
 };
 

diff --git a/Source/Plugins/Plugin_VideoSoftware/Src/Tev.cpp b/Source/Plugins/Plugin_VideoSoftware/Src/Tev.cpp
@@ -748,10 +748,15 @@ void Tev::Draw()
 
 		}
 
-		// stuff to do!
-		// here, where we'll have to add/handle x range adjustment (if related BP register it's enabled)
-		// x_adjust = sqrt((x-center)^2 + k^2)/k
-		// ze *= x_adjust
+		if(bpmem.fogRange.Base.Enabled)
+		{
+			// TODO: Check if this is correct (especially the magic values)
+			float offset = Position[0] - bpmem.fogRange.Base.Center + 324.f;
+			int index = 9 - abs(Position[0] - bpmem.fogRange.Base.Center + 324) / (162/5);
+			float k = bpmem.fogRange.K[index/2].GetValue(index%2);
+			float x_adjust = sqrt(offset*offset/162.f/162.f + k*k)/k;
+			ze *= x_adjust;
+		}
 
 		ze -= bpmem.fog.c_proj_fsel.GetC();