1HEADmaster

1 files changed, 32 insertions, 0 deletions

diff --git a/materialsystem/stdshaders/eyeglint_ps2x.fxc b/materialsystem/stdshaders/eyeglint_ps2x.fxc
new file mode 100644
index 0000000..bc39f07
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+++ b/materialsystem/stdshaders/eyeglint_ps2x.fxc
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+// ======= Copyright � 1996-2007, Valve Corporation, All rights reserved. ======
+//
+// Run procedural glint generation inner loop in pixel shader (ps_2_0)
+//
+// =============================================================================
+
+struct PS_INPUT
+{
+	float2 tc			: TEXCOORD0;	// Interpolated coordinate of current texel
+	float2 glintCenter	: TEXCOORD1;	// Uniform value containing center of glint
+	float3 glintColor	: TEXCOORD2;	// Uniform value of color of glint
+};
+
+float GlintGaussSpotCoefficient( float2 d )
+{
+	return saturate( exp( -25.0f * dot(d, d) ) );
+}
+
+float4 main( PS_INPUT i ) : COLOR
+{
+	float2 uv = i.tc - i.glintCenter;	// This texel relative to glint center
+
+	float intensity =	GlintGaussSpotCoefficient( uv + float2(-0.25f, -0.25f) ) + 
+						GlintGaussSpotCoefficient( uv + float2( 0.25f, -0.25f) ) + 
+					5 * GlintGaussSpotCoefficient( uv ) + 
+						GlintGaussSpotCoefficient( uv + float2(-0.25f,  0.25f) ) + 
+						GlintGaussSpotCoefficient( uv + float2( 0.25f,  0.25f) );
+			
+	intensity *= 4.0f/9.0f;
+
+	return float4( intensity * i.glintColor, 1.0f );
+}
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