Cleaning up the shader for the 'forest portals'

D3D11Engine/Shaders/PS_PortalDiffuse.hlsl

@@ -1,5 +1,5 @@
 //--------------------------------------------------------------------------------------
-// World/VOB-Pixelshader for G2D3D11 by SaulMyers
+// World/VOB-Pixelshader for Gothic 1 D3D11 by SaulMyers
 //--------------------------------------------------------------------------------------
 #include <DS_Defines.h>
 #include <AtmosphericScattering.h>
@@ -8,19 +8,14 @@
 // Textures and Samplers
 //--------------------------------------------------------------------------------------
 SamplerState SS_Linear : register(s0);
-SamplerState SS_samMirror : register(s1);
 Texture2D	TX_Texture0 : register(t0);
-Texture2D	TX_Texture1 : register(t1);
-Texture2D	TX_Texture2 : register(t2);
-TextureCube	TX_ReflectionCube : register(t4);
 
 //--------------------------------------------------------------------------------------
 // Input / Output structures
 //--------------------------------------------------------------------------------------
 struct PS_INPUT
 {
 	float2 vTexcoord		: TEXCOORD0;
-	float2 vTexcoord2		: TEXCOORD1;
 	float4 vDiffuse			: TEXCOORD2;
 	float3 vNormalVS		: TEXCOORD4;
 	float3 vViewPosition	: TEXCOORD5;
@@ -34,29 +29,28 @@ DEFERRED_PS_OUTPUT PSMain(PS_INPUT Input) : SV_TARGET
 {
 	//how far is the nameless hero from the object?
 	float distFromCamera = distance(Input.vViewPosition, Input.vPosition);
-
-	//start / end distances for fading
-	float startFade = 6000.0f;
-	float completeFade = 5000.0f;
-
-	//how much to fade the object by
-	float percentageFade = (distFromCamera - completeFade) / (startFade - completeFade);
-
-	//keep the fade in bounds
-	if (percentageFade < 0) {percentageFade = 0.0f;}
-	if (percentageFade > 1)	{percentageFade = 1.0f;}
-
-	//darken the portals depending on where the sun is in the sky
-	float darknessFactor = 2.0f;
-	if (AC_LightPos.y <= 0.05f) { darknessFactor += (1 - AC_LightPos.y) * 6; }
-	else if (AC_LightPos.y > 0.05f) { darknessFactor = 7.5f - (1 + AC_LightPos.y) * 3; }
-
-	//sample the texture we want to fade out and apply relevant darkness factor for day / night cycle
-	float4 color = TX_Texture0.Sample(SS_Linear, Input.vTexcoord) / darknessFactor;
-
-	//apply fade
-	DEFERRED_PS_OUTPUT output;
-	output.vDiffuse = float4(color.rgb, percentageFade);	
-
-	return output;
+
+//correct issue with transparency of forest portals for certain camera angles
+if (Input.vViewPosition.x > 0) { distFromCamera = distFromCamera + (Input.vViewPosition.x * clamp(Input.vViewPosition.x / 9000, 0, 1)); }
+
+//start / end distances for fading
+float startFade = 6500.0f;
+float completeFade = 5500.0f;
+
+//how much to fade the object by
+float percentageFade = clamp((distFromCamera - completeFade) / (startFade - completeFade), 0, 1);
+
+//darken the portals depending on where the sun is in the sky
+float darknessFactor = 4.0f;
+if (AC_LightPos.y <= 0.05f) { darknessFactor += (1 - AC_LightPos.y) * 6; }
+else if (AC_LightPos.y > 0.05f) { darknessFactor = 7.5f - (1 + AC_LightPos.y) * 3; }
+
+//sample the texture we want to fade out and apply relevant darkness factor for day / night cycle
+float4 color = TX_Texture0.Sample(SS_Linear, Input.vTexcoord) / darknessFactor;
+
+//apply fade
+DEFERRED_PS_OUTPUT output;
+output.vDiffuse = float4(color.rgb, percentageFade);
+
+return output;
 }