add : sam groud textures & sam character animation

Assets/_Content/Models/VFX/Ray/Shaders/include/Ray.hlsl

@@ -7,7 +7,7 @@ float2 WorldToScreenUV(float3 posWS)
     return ndc * .5 + .5; // [0, 1]
 }
 
-float3 GetBillboardPositionWS(float3 PositionOS, float3 PivotWS, float3 ViewDirWS)
+float3 GetBillboardPositionWS(float3 PositionOS, float3 PivotWS, float3 ViewDirWS, uint EnableFacing)
 {
     float3 upWS = normalize(TransformObjectToWorldDir(float3(0, 1, 0)));
 
@@ -19,6 +19,13 @@ float3 GetBillboardPositionWS(float3 PositionOS, float3 PivotWS, float3 ViewDirW
         rightWS = normalize(rightWS);
 
     float3 forwardWS = normalize(cross(rightWS, upWS));
+
+    // Local object-space axes, used as fallback when facing is disabled
+    float3 localRightWS = normalize(TransformObjectToWorldDir(float3(1, 0, 0)));
+    float3 localForwardWS = normalize(TransformObjectToWorldDir(float3(0, 0, 1)));
+
+    rightWS = lerp(localRightWS, rightWS, (float)EnableFacing);
+    forwardWS = lerp(localForwardWS, forwardWS, (float)EnableFacing);
     
     float3 pOS = PositionOS.x * rightWS + PositionOS.y * upWS + PositionOS.z * forwardWS;
        
@@ -45,6 +52,7 @@ void Ray_float
     float3 PositionOS,
     float4 ScreenPos,
     uint Orthographic,
+    uint EnableFacing,
     float UvDebug,
     out float3 OutPosition,
     out float3 OutColor
@@ -67,9 +75,9 @@ void Ray_float
     float3 pOS_1 = AppyTaperAndScale(float3( .5, PositionOS.y, 0), scale);
     float3 pOS_2 = AppyTaperAndScale(float3(-.5, PositionOS.y, 0), scale);
               
-    float3 pWS_0 = GetBillboardPositionWS(pOS_0, pivot, viewDir);
-    float3 pWS_1 = GetBillboardPositionWS(pOS_1, pivot, viewDir);
-    float3 pWS_2 = GetBillboardPositionWS(pOS_2, pivot, viewDir);
+    float3 pWS_0 = GetBillboardPositionWS(pOS_0, pivot, viewDir, EnableFacing);
+    float3 pWS_1 = GetBillboardPositionWS(pOS_1, pivot, viewDir, EnableFacing);
+    float3 pWS_2 = GetBillboardPositionWS(pOS_2, pivot, viewDir, EnableFacing);
 
     float2 pSC_0 = ScreenPos.xy;
     float2 pSC_1 = WorldToScreenUV(pWS_1);