port from perforce

evoke-64k/ev10/cfg/psray.txt

@@ -0,0 +1,56 @@
+float3 lightDir : register(c1);
+float3 viewDir : register(c4);
+float3 passID2expIsLast : register(c23);
+
+sampler2D colorSampler : register(s0);
+sampler2D depthSampler : register(s1);
+
+// Tweakables
+static float4 g_fRayColor = float4(0.9f, 0.8f, 0.7f, 1.0f);
+static float g_fRayNearPlane = 10.0f;
+static float g_fRayFarPlane = 500.0f;
+static float g_fRayDensity = 0.25f;
+static float g_fRayDecay = 0.9125f;
+static float g_fRayAnglePersistence = 4.f;
+
+float4 ps_ray_mask(float2 TexCoord : TEXCOORD0, float2 LightPos : TEXCOORD2) : COLOR0
+{
+	float2 d = LightPos - TexCoord;
+	float r = saturate( 1.f - dot(d, d) );
+	r *= saturate( g_fRayAnglePersistence * dot(-lightDir, viewDir) );
+
+	float m = tex2D(depthSampler, TexCoord).x;
+	m = saturate( (m - g_fRayNearPlane) / (g_fRayFarPlane - g_fRayNearPlane) );
+//	m = saturate(1.f - m);
+	
+//	float2 p = TexCoord * 2.0f - 1.0f;
+//	float b = saturate( 1.0f - 0.7071f * dot(p, p) );
+
+	return /* b */ m * r * g_fRayColor;
+}
+
+// Pixel shader
+float4 ps_ray_extrude(float2 TexCoord : TEXCOORD0, float2 LightPos : TEXCOORD2) : COLOR0
+{	
+	float2 s = g_fRayDensity / (passID2expIsLast.y) * (LightPos - TexCoord) / 8.f;
+	
+	float4 r = 0.f, ro = 0.f, rm = 0.f, rd = .125f;
+	float2 c = TexCoord;
+	
+	for(int i = 0; i < 8; i++)
+	{
+		float4 rs = tex2D(colorSampler, c);
+		ro = (i == 0) ? rs : ro;
+		
+		rm = max(rs, rm);
+		rs.xyz = rm.xyz;
+		r += rs * rd;
+		
+		rd.xyz *= (float3)g_fRayDecay;
+		c += s;
+	}
+	
+	r.a = min(ro.a, r.a);
+
+	return r * saturate(1.f - passID2expIsLast.z * r.a);
+}