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using System.Linq;
using UnityEngine;
using UnityEditor.Graphing;
namespace UnityEditor.ShaderGraph
{
[FormerName("UnityEditor.ShaderGraph.CubemapNode")]
[Title("Input", "Texture", "Sample Cubemap")]
public class SampleCubemapNode : AbstractMaterialNode, IGeneratesBodyCode, IMayRequireViewDirection, IMayRequireNormal
{
public const int OutputSlotId = 0;
public const int CubemapInputId = 1;
public const int ViewDirInputId = 2;
public const int NormalInputId = 3;
public const int LODInputId = 4;
const string kOutputSlotName = "Out";
const string kCubemapInputName = "Cube";
const string kViewDirInputName = "ViewDir";
const string kNormalInputName = "Normal";
const string kLODInputName = "LOD";
public override bool hasPreview { get { return true; } }
public SampleCubemapNode()
{
name = "Sample Cubemap";
UpdateNodeAfterDeserialization();
}
public override string documentationURL
{
get { return "https://github.com/Unity-Technologies/ShaderGraph/wiki/Sample-Cubemap-Node"; }
}
public sealed override void UpdateNodeAfterDeserialization()
{
AddSlot(new Vector4MaterialSlot(OutputSlotId, kOutputSlotName, kOutputSlotName, SlotType.Output, Vector4.zero));
AddSlot(new CubemapInputMaterialSlot(CubemapInputId, kCubemapInputName, kCubemapInputName));
AddSlot(new ViewDirectionMaterialSlot(ViewDirInputId, kViewDirInputName, kViewDirInputName, CoordinateSpace.Object));
AddSlot(new NormalMaterialSlot(NormalInputId, kNormalInputName, kNormalInputName, CoordinateSpace.Object));
AddSlot(new Vector1MaterialSlot(LODInputId, kLODInputName, kLODInputName, SlotType.Input, 0));
RemoveSlotsNameNotMatching(new[] { OutputSlotId, CubemapInputId, ViewDirInputId, NormalInputId, LODInputId });
}
public override PreviewMode previewMode
{
get { return PreviewMode.Preview3D; }
}
// Node generations
public virtual void GenerateNodeCode(ShaderGenerator visitor, GenerationMode generationMode)
{
var id = GetSlotValue(CubemapInputId, generationMode);
string result = string.Format("{0}4 {1} = SAMPLE_TEXTURECUBE_LOD({2}, {3}, reflect(-{4}, {5}), {6});"
, precision
, GetVariableNameForSlot(OutputSlotId)
, id
, "sampler" + id
, GetSlotValue(ViewDirInputId, generationMode)
, GetSlotValue(NormalInputId, generationMode)
, GetSlotValue(LODInputId, generationMode));
visitor.AddShaderChunk(result, true);
}
public NeededCoordinateSpace RequiresViewDirection()
{
var viewDirSlot = FindInputSlot<MaterialSlot>(ViewDirInputId);
var edgesViewDir = owner.GetEdges(viewDirSlot.slotReference);
if (!edgesViewDir.Any())
return CoordinateSpace.Object.ToNeededCoordinateSpace();
else
return NeededCoordinateSpace.None;
}
public NeededCoordinateSpace RequiresNormal()
{
var normalSlot = FindInputSlot<MaterialSlot>(NormalInputId);
var edgesNormal = owner.GetEdges(normalSlot.slotReference);
if (!edgesNormal.Any())
return CoordinateSpace.Object.ToNeededCoordinateSpace();
else
return NeededCoordinateSpace.None;
}
}
}