1HEADmaster

1 files changed, 65 insertions, 0 deletions

diff --git a/materialsystem/stdshaders/splinecard_vsxx.fxc b/materialsystem/stdshaders/splinecard_vsxx.fxc
new file mode 100644
index 0000000..35a3c23
--- /dev/null
+++ b/materialsystem/stdshaders/splinecard_vsxx.fxc
@@ -0,0 +1,65 @@
+#include "common_vs_fxc.h"
+
+
+const float4x3 cModelView			: register(SHADER_SPECIFIC_CONST_0);
+const float4x4 cProj				: register(SHADER_SPECIFIC_CONST_3);
+
+// derivative of catmull rom spline courtesy of calc
+float4 DCatmullRomSpline ( float4 a, float4 b, float4 c, float4 d, float t )
+{
+	return 0.5 *( c - a + t * ( 2 * a - 5 * b + 4 * c - d + t * (3 * b - a - 3 * c + d ) ) 
+				 + t * ( 2 * a - 5 * b + 4 * c - d + 2 * ( t * ( 3 * b - a - 3 * c + d ) ) ) );
+}
+
+float3 DCatmullRomSpline3 ( float3 a, float3 b, float3 c, float3 d, float t )
+{
+	return 0.5 *( c - a + t * ( 2 * a - 5 * b + 4 * c - d + t * (3 * b - a - 3 * c + d ) ) 
+				 + t * ( 2 * a - 5 * b + 4 * c - d + 2 * ( t * ( 3 * b - a - 3 * c + d ) ) ) );
+}
+
+    
+float4 CatmullRomSpline( float4 a, float4 b, float4 c, float4 d, float t )
+{
+	return b + 0.5 * t * ( c - a + t * ( 2 * a - 5 * b + 4 * c - d + t * ( -a + 3 * b -3 * c + d ) ) );
+}
+
+struct VS_INPUT
+{
+	// This is all of the stuff that we ever use.
+	float4 vTint            : COLOR;
+	float4 vParms           : POSITION;						// T V side_id
+	float4 vSplinePt0		: TEXCOORD0;					// x y z rad
+	float4 vSplinePt1		: TEXCOORD1;					// x y z rad
+	float4 vSplinePt2		: TEXCOORD2;					// x y z rad
+	float4 vSplinePt3		: TEXCOORD3;					// x y z rad
+};
+
+struct VS_OUTPUT
+{
+    float4 projPos			: POSITION;	
+
+	float2 texCoord0		: TEXCOORD0;
+	float2 texCoord1		: TEXCOORD1;
+	float4 argbcolor		: COLOR;
+	float4 blendfactor0		: TEXCOORD2;
+	float4 vScreenPos		: TEXCOORD7;
+};
+
+VS_OUTPUT main( const VS_INPUT v )
+{
+	VS_OUTPUT o;
+
+	float4 posrad =
+		CatmullRomSpline( v.vSplinePt0, v.vSplinePt1, v.vSplinePt2, v.vSplinePt3, v.vParms.x );
+	float3 v2p = ( posrad.xyz - cEyePos );
+	float3 tangent=DCatmullRomSpline3( v.vSplinePt0, v.vSplinePt1, v.vSplinePt2, v.vSplinePt3, v.vParms.x );
+	float3 ofs = normalize( cross(v2p, normalize( tangent) ) );
+	posrad.xyz += ofs * ( posrad.w * ( v.vParms.z - .5 ) );
+	o.projPos  = mul( float4(posrad.xyz, 1.0f), cViewProj );
+	o.texCoord0 = o.texCoord1 = float2( (1-v.vParms.z), v.vParms.y);
+	o.argbcolor = v.vTint;
+	o.blendfactor0 = float4(0,0,0,0);
+	o.vScreenPos = float4(0,0,0,0);
+	return o;
+
+}