get rid of clip imput on node

Author: tracychen1234

com.unity.sg2/Documentation~/Imposter-Sample-Node.md

@@ -16,7 +16,6 @@ If the imposter object has more than one texture to sample (e.g. color, normal,
 | UV2 | Input      |    Vector4 | The virtual UV for the third frame |
 | Grid | Input      |    Vector4 | The current UV grid, which is used to find the corresponding sample frames |
 | Frames | Input      |    Float | The number of the imposter frames in each axis|
-| Clip | Input      |    Float | The amount of clipping for a single frame |
 | Parallax | Input      |    Float | Parallax strength|
 | Height Map Channel | Input      |    Int | The channle of the height map to sample for parallax mapping, if any|
 | RGBA | Output      |    Vector3 | A vector4 from the sampled texture |
@@ -57,11 +56,11 @@ The Imposter Sample Node [!include[nodes-controls](./snippets/nodes-controls.md)
 ### ThreeFrames
 
 ```
-ImposterSample(HeightMapChannel, ViewDirectionTS, Parallax, Frames, Texture.tex, Texture.texelSize, Clip, Grid, UV0, UV1, UV2, Sampler.samplerstate, RGBA);
+ImposterSample(HeightMapChannel, ViewDirectionTS, Parallax, Frames, Texture.tex, Texture.texelSize, Grid, UV0, UV1, UV2, Sampler.samplerstate, RGBA);
 ```
 
 ### OneFrame
 
 ```
-ImposterSample_oneFrame(HeightMapChannel, ViewDirectionTS, Parallax, Frames, Texture.tex, Texture.texelSize, Clip, Grid, UV0, Sampler.samplerstate, RGBA);
+ImposterSample_oneFrame(HeightMapChannel, ViewDirectionTS, Parallax, Frames, Texture.tex, Texture.texelSize, Grid, UV0, Sampler.samplerstate, RGBA);
 ```

com.unity.sg2/Documentation~/previews/ImposterSample.md

@@ -10,7 +10,6 @@ This creates the illusion of a 3D object on a billboard object because the impos
 **UV2** - The virtual UV for the third frame.
 **Grid** - The current UV grid, which is used to find the corresponding sample frames.
 **Frames** - The number of the imposter frames in each axis.
-**Clip** - The amount of clipping for a single frame.
 **Parallax** - Parallax strength.
 **Height Map Channel** - The channle of the height map to sample for parallax mapping, if any.
 

com.unity.sg2/Editor/GraphDeltaRegistry/FunctionDefinitions/StandardDefinitions/Input/MeshDeformation/ImposterSampleNode.cs

@@ -14,7 +14,7 @@ internal class ImposterSampleNode : IStandardNode
                     functions: new FunctionDescriptor[] {
                      new(
                     "ThreeFrames",
-    @"ImposterSample(HeightMapChannel, ViewDirectionTS, Parallax, Frames, Texture.tex, Texture.texelSize, Clip, Grid, UV0, UV1, UV2, Sampler.samplerstate, RGBA);",
+    @"ImposterSample(HeightMapChannel, ViewDirectionTS, Parallax, Frames, Texture.tex, Texture.texelSize, Grid, UV0, UV1, UV2, Sampler.samplerstate, RGBA);",
                 new ParameterDescriptor[]
                 {
                     new ParameterDescriptor("Texture", TYPE.Texture2D, Usage.In),
@@ -24,7 +24,6 @@ internal class ImposterSampleNode : IStandardNode
                     new ParameterDescriptor("UV2", TYPE.Vec4, Usage.In),
                     new ParameterDescriptor("Grid", TYPE.Vec4, Usage.In),
                     new ParameterDescriptor("Frames", TYPE.Float, Usage.In, new float[] {16f}),
-                    new ParameterDescriptor("Clip", TYPE.Float, Usage.In, new float[] {1f}),
                     new ParameterDescriptor("Parallax", TYPE.Float, Usage.In),
                     new ParameterDescriptor("ViewDirectionTS", TYPE.Vec3, Usage.Local, REF.TangentSpace_ViewDirection),
                     new ParameterDescriptor("HeightMapChannel", TYPE.Int, Usage.In, 3),
@@ -37,15 +36,14 @@ internal class ImposterSampleNode : IStandardNode
                   ),
                      new(
                     "OneFrame",
-    @"ImposterSample_oneFrame(HeightMapChannel, ViewDirectionTS, Parallax, Frames, Texture.tex, Texture.texelSize, Clip, Grid, UV0, Sampler.samplerstate, RGBA);",
+    @"ImposterSample_oneFrame(HeightMapChannel, ViewDirectionTS, Parallax, Frames, Texture.tex, Texture.texelSize, Grid, UV0, Sampler.samplerstate, RGBA);",
                 new ParameterDescriptor[]
                 {
                     new ParameterDescriptor("Texture", TYPE.Texture2D, Usage.In),
                     new ParameterDescriptor("Sampler", TYPE.SamplerState, Usage.In),
                     new ParameterDescriptor("UV0", TYPE.Vec4, Usage.In),
                     new ParameterDescriptor("Grid", TYPE.Vec4, Usage.In),
                     new ParameterDescriptor("Frames", TYPE.Float, Usage.In, new float[] {16f}),
-                    new ParameterDescriptor("Clip", TYPE.Float, Usage.In, new float[] {1f}),
                     new ParameterDescriptor("Parallax", TYPE.Float, Usage.In),
                     new ParameterDescriptor("ViewDirectionTS", TYPE.Vec3, Usage.Local, REF.TangentSpace_ViewDirection),
                     new ParameterDescriptor("HeightMapChannel", TYPE.Int, Usage.In, 3),
@@ -103,10 +101,6 @@ internal class ImposterSampleNode : IStandardNode
                     name: "Frames",
                     tooltip: "The amount of the imposter frames"
                 ),
-                new ParameterUIDescriptor(
-                    name: "Clip",
-                    tooltip: "The amount of clipping for a single frame"
-                ),
                 new ParameterUIDescriptor(
                     name: "Parallax",
                     tooltip: "Adds parallax effect the port value is true"