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194 行
7.2 KiB

using System;
using System.Collections.Generic;
using UnityEditor.Graphing;
using UnityEditor.ShaderGraph.Drawing.Controls;
using UnityEngine;
namespace UnityEditor.ShaderGraph
{
[Title("Channel", "Flip")]
public class FlipNode : AbstractMaterialNode, IGeneratesBodyCode, IGeneratesFunction
{
public FlipNode()
{
name = "Flip";
UpdateNodeAfterDeserialization();
}
public override string documentationURL
{
get { return "https://github.com/Unity-Technologies/ShaderGraph/wiki/Flip-Node"; }
}
const int InputSlotId = 0;
const int OutputSlotId = 1;
const string kInputSlotName = "In";
const string kOutputSlotName = "Out";
public override bool hasPreview
{
get { return true; }
}
string GetFunctionName()
{
return "Unity_Flip_" + NodeUtils.ConvertConcreteSlotValueTypeToString(precision, FindOutputSlot<MaterialSlot>(OutputSlotId).concreteValueType);
}
public sealed override void UpdateNodeAfterDeserialization()
{
AddSlot(new DynamicVectorMaterialSlot(InputSlotId, kInputSlotName, kInputSlotName, SlotType.Input, Vector4.zero));
AddSlot(new DynamicVectorMaterialSlot(OutputSlotId, kOutputSlotName, kOutputSlotName, SlotType.Output, Vector4.zero));
RemoveSlotsNameNotMatching(new[] { InputSlotId, OutputSlotId });
}
int channelCount { get { return SlotValueHelper.GetChannelCount(FindSlot<MaterialSlot>(InputSlotId).concreteValueType); } }
[SerializeField]
private bool m_RedChannel;
[ToggleControl("Red")]
public ToggleData redChannel
{
get { return new ToggleData(m_RedChannel, channelCount > 0); }
set
{
if (m_RedChannel == value.isOn)
return;
m_RedChannel = value.isOn;
Dirty(ModificationScope.Node);
}
}
[SerializeField]
private bool m_GreenChannel;
[ToggleControl("Green")]
public ToggleData greenChannel
{
get { return new ToggleData(m_GreenChannel, channelCount > 1); }
set
{
if (m_GreenChannel == value.isOn)
return;
m_GreenChannel = value.isOn;
Dirty(ModificationScope.Node);
}
}
[SerializeField]
private bool m_BlueChannel;
[ToggleControl("Blue")]
public ToggleData blueChannel
{
get { return new ToggleData(m_BlueChannel, channelCount > 2); }
set
{
if (m_BlueChannel == value.isOn)
return;
m_BlueChannel = value.isOn;
Dirty(ModificationScope.Node);
}
}
private bool m_AlphaChannel;
[ToggleControl("Alpha")]
public ToggleData alphaChannel
{
get { return new ToggleData(m_AlphaChannel, channelCount > 3); }
set
{
if (m_AlphaChannel == value.isOn)
return;
m_AlphaChannel = value.isOn;
Dirty(ModificationScope.Node);
}
}
public void GenerateNodeCode(ShaderGenerator visitor, GenerationMode generationMode)
{
var sb = new ShaderStringBuilder();
var inputValue = GetSlotValue(InputSlotId, generationMode);
var outputValue = GetSlotValue(OutputSlotId, generationMode);
sb.AppendLine("{0} {1};", FindOutputSlot<MaterialSlot>(OutputSlotId).concreteValueType.ToString(precision), GetVariableNameForSlot(OutputSlotId));
if (!generationMode.IsPreview())
{
sb.AppendLine("{0} _{1}_Flip = {0} ({2}",
FindOutputSlot<MaterialSlot>(OutputSlotId).concreteValueType.ToString(precision),
GetVariableNameForNode(),
Convert.ToInt32(m_RedChannel));
if (channelCount > 1)
sb.Append(", {0}", Convert.ToInt32(m_GreenChannel));
if (channelCount > 2)
sb.Append(", {0}", Convert.ToInt32(m_BlueChannel));
if (channelCount > 3)
sb.Append(", {0}", Convert.ToInt32(m_AlphaChannel));
sb.Append(");");
}
sb.AppendLine("{0}({1}, _{2}_Flip, {3});", GetFunctionName(), inputValue, GetVariableNameForNode(), outputValue);
visitor.AddShaderChunk(sb.ToString(), false);
}
public override void CollectPreviewMaterialProperties(List<PreviewProperty> properties)
{
base.CollectPreviewMaterialProperties(properties);
properties.Add(new PreviewProperty(PropertyType.Vector4)
{
name = string.Format("_{0}_Flip", GetVariableNameForNode()),
vector4Value = new Vector4(Convert.ToInt32(m_RedChannel), Convert.ToInt32(m_GreenChannel), Convert.ToInt32(m_BlueChannel), Convert.ToInt32(m_AlphaChannel)),
});
}
public override void CollectShaderProperties(PropertyCollector properties, GenerationMode generationMode)
{
if (!generationMode.IsPreview())
return;
base.CollectShaderProperties(properties, generationMode);
properties.AddShaderProperty(new Vector4ShaderProperty
{
overrideReferenceName = string.Format("_{0}_Flip", GetVariableNameForNode()),
generatePropertyBlock = false
});
}
public void GenerateNodeFunction(ShaderGenerator visitor, GraphContext graphContext, GenerationMode generationMode)
{
var sb = new ShaderStringBuilder();
sb.AppendLine("void {0}({1} In, {2} Flip, out {3} Out)",
GetFunctionName(),
FindInputSlot<MaterialSlot>(InputSlotId).concreteValueType.ToString(precision),
FindInputSlot<MaterialSlot>(InputSlotId).concreteValueType.ToString(precision),
FindOutputSlot<MaterialSlot>(OutputSlotId).concreteValueType.ToString(precision));
using (sb.BlockScope())
{
sb.AppendLine("Out = (Flip * -2 + 1) * In;");
}
visitor.AddShaderChunk(sb.ToString(), true);
}
public void GenerateNodeFunction(FunctionRegistry registry, GraphContext graphContext, GenerationMode generationMode)
{
registry.ProvideFunction(GetFunctionName(), s =>
{
s.AppendLine("void {0}({1} In, {2} Flip, out {3} Out)",
GetFunctionName(),
FindInputSlot<MaterialSlot>(InputSlotId).concreteValueType.ToString(precision),
FindInputSlot<MaterialSlot>(InputSlotId).concreteValueType.ToString(precision),
FindOutputSlot<MaterialSlot>(OutputSlotId).concreteValueType.ToString(precision));
using (s.BlockScope())
{
s.AppendLine("Out = (Flip * -2 + 1) * In;");
}
});
}
}
}