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74 行
2.2 KiB
74 行
2.2 KiB
using System.Collections.Generic;
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using UnityEngine.MaterialGraph;
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using UnityEngine.Graphing;
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namespace UnityEngine.MaterialGraph
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{
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[Title("Math/Constants")]
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public class ConstantsNode : PropertyNode, IGeneratesBodyCode
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{
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static Dictionary<ConstantType, float> m_constantList = new Dictionary<ConstantType, float>
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{
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{ConstantType.PI, 3.1415926f },
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{ConstantType.TAU, 6.28318530f},
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{ConstantType.PHI, 1.618034f},
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{ConstantType.E, 2.718282f},
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{ConstantType.SQRT2, 1.414214f},
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};
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[SerializeField]
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private ConstantType m_constant = ConstantType.PI;
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private const int kOutputSlotId = 0;
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private const string kOutputSlotName = "Constant";
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public ConstantType constant
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{
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get { return m_constant; }
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set
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{
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if (m_constant == value)
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return;
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m_constant = value;
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if (onModified != null)
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{
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onModified(this, ModificationScope.Graph);
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}
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}
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}
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public ConstantsNode()
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{
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name = "MathConstant";
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UpdateNodeAfterDeserialization();
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}
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public sealed override void UpdateNodeAfterDeserialization()
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{
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AddSlot(new MaterialSlot(kOutputSlotId, kOutputSlotName, kOutputSlotName, SlotType.Output, SlotValueType.Vector1, Vector4.zero, false));
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RemoveSlotsNameNotMatching(new[] { kOutputSlotId });
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}
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public override PropertyType propertyType
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{
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get { return PropertyType.Float; }
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}
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public override PreviewProperty GetPreviewProperty()
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{
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return new PreviewProperty
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{
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m_Name = propertyName,
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m_PropType = PropertyType.Float,
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m_Float = m_constantList[constant]
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};
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}
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public void GenerateNodeCode(ShaderGenerator visitor, GenerationMode generationMode)
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{
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visitor.AddShaderChunk(precision + " " + propertyName + " = " + m_constantList[constant] + ";", true);
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}
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}
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}
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