Boat Attack使用了Universal RP的许多新图形功能,可以用于探索 Universal RP 的使用方式和技巧。
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using System;
using System.Reflection;
using UnityEngine;
using UnityEngine.UIElements;
namespace UnityEditor.ShaderGraph.Drawing.Controls
{
[AttributeUsage(AttributeTargets.Property)]
class ChannelMixerControlAttribute : Attribute, IControlAttribute
{
string m_Label;
float m_Minimum;
float m_Maximum;
public ChannelMixerControlAttribute(string label = null, float minimum = -2f, float maximum = 2f)
{
m_Label = label;
m_Minimum = minimum;
m_Maximum = maximum;
}
public VisualElement InstantiateControl(AbstractMaterialNode node, PropertyInfo propertyInfo)
{
return new ChannelMixerControlView(m_Label, m_Minimum, m_Maximum, node, propertyInfo);
}
}
class ChannelMixerControlView : VisualElement
{
AbstractMaterialNode m_Node;
PropertyInfo m_PropertyInfo;
ChannelMixerNode.ChannelMixer m_ChannelMixer;
int m_OutChannel;
Slider m_RedSlider;
Slider m_GreenSlider;
Slider m_BlueSlider;
FloatField m_RedInputField;
FloatField m_GreenInputField;
FloatField m_BlueInputField;
float m_Minimum;
float m_Maximum;
bool m_Initialized;
public ChannelMixerControlView(string label, float minimum, float maximum, AbstractMaterialNode node, PropertyInfo propertyInfo)
{
m_Node = node;
m_PropertyInfo = propertyInfo;
styleSheets.Add(Resources.Load<StyleSheet>("Styles/Controls/ChannelMixerControlView"));
m_ChannelMixer = (ChannelMixerNode.ChannelMixer)m_PropertyInfo.GetValue(m_Node, null);
m_OutChannel = 0;
m_Minimum = minimum;
m_Maximum = maximum;
if (propertyInfo.PropertyType != typeof(ChannelMixerNode.ChannelMixer))
throw new ArgumentException("Property must be of type ChannelMixer.", "propertyInfo");
label = label ?? ObjectNames.NicifyVariableName(propertyInfo.Name);
if (!string.IsNullOrEmpty(label))
Add(new Label(label));
var buttonPanel = new VisualElement { name = "buttonPanel" };
Action changedOutputRed = () => OnClickButton(0);
var outputButtonRed = new Button(changedOutputRed);
outputButtonRed.Add(new Label("R"));
buttonPanel.Add(outputButtonRed);
Action changedOutputGreen = () => OnClickButton(1);
var outputButtonGreen = new Button(changedOutputGreen);
outputButtonGreen.Add(new Label("G"));
buttonPanel.Add(outputButtonGreen);
Action changedOutputBlue = () => OnClickButton(2);
var outputButtonBlue = new Button(changedOutputBlue);
outputButtonBlue.Add(new Label("B"));
buttonPanel.Add(outputButtonBlue);
Add(buttonPanel);
var redSliderPanel = new VisualElement { name = "sliderPanel" };
redSliderPanel.Add(new Label("R"));
Action<float> changedRedIn = (s) => { OnChangeSlider(s, 0); };
m_RedSlider = new Slider(m_Minimum, m_Maximum);
m_RedSlider.RegisterValueChangedCallback((evt) => OnChangeSlider(evt.newValue, 0));
redSliderPanel.Add(m_RedSlider);
m_RedInputField = new FloatField { value = m_ChannelMixer.outRed.x };
m_RedInputField.RegisterCallback<ChangeEvent<double>, int>(OnChangeInputField, 0);
redSliderPanel.Add(m_RedInputField);
Add(redSliderPanel);
var greenSliderPanel = new VisualElement { name = "sliderPanel" };
greenSliderPanel.Add(new Label("G"));
m_GreenSlider = new Slider(m_Minimum, m_Maximum);
m_GreenSlider.RegisterValueChangedCallback((evt) => OnChangeSlider(evt.newValue, 1));
greenSliderPanel.Add(m_GreenSlider);
m_GreenInputField = new FloatField { value = m_ChannelMixer.outRed.y };
m_GreenInputField.RegisterCallback<ChangeEvent<double>, int>(OnChangeInputField, 1);
greenSliderPanel.Add(m_GreenInputField);
Add(greenSliderPanel);
var blueSliderPanel = new VisualElement { name = "sliderPanel" };
blueSliderPanel.Add(new Label("B"));
m_BlueSlider = new Slider(m_Minimum, m_Maximum);
m_BlueSlider.RegisterValueChangedCallback((evt) => OnChangeSlider(evt.newValue, 2));
blueSliderPanel.Add(m_BlueSlider);
m_BlueInputField = new FloatField { value = m_ChannelMixer.outRed.z };
m_BlueInputField.RegisterCallback<ChangeEvent<double>, int>(OnChangeInputField, 2);
blueSliderPanel.Add(m_BlueInputField);
Add(blueSliderPanel);
m_Initialized = true;
ResetSliders();
}
void ResetSliders()
{
Vector3 outputChannel = GetOutputChannel();
m_RedSlider.value = outputChannel[0];
m_GreenSlider.value = outputChannel[1];
m_BlueSlider.value = outputChannel[2];
}
void OnChangeSlider(float value, int inChannel)
{
if (!m_Initialized)
return;
m_Node.owner.owner.RegisterCompleteObjectUndo("Slider Change");
switch (m_OutChannel)
{
case 1:
m_ChannelMixer.outGreen[inChannel] = value;
break;
case 2:
m_ChannelMixer.outBlue[inChannel] = value;
break;
default:
m_ChannelMixer.outRed[inChannel] = value;
break;
}
switch (inChannel)
{
case 1:
m_GreenInputField.value = value;
break;
case 2:
m_BlueInputField.value = value;
break;
default:
m_RedInputField.value = value;
break;
}
m_PropertyInfo.SetValue(m_Node, m_ChannelMixer, null);
}
void OnChangeInputField(ChangeEvent<double> evt, int inChannel)
{
if (!m_Initialized)
return;
var value = Mathf.Max(Mathf.Min((float)evt.newValue, m_Maximum), m_Minimum);
m_Node.owner.owner.RegisterCompleteObjectUndo("Input Field Change");
switch (m_OutChannel)
{
case 1:
m_ChannelMixer.outGreen[inChannel] = value;
break;
case 2:
m_ChannelMixer.outBlue[inChannel] = value;
break;
default:
m_ChannelMixer.outRed[inChannel] = value;
break;
}
switch (inChannel)
{
case 1:
m_GreenSlider.value = value;
break;
case 2:
m_BlueSlider.value = value;
break;
default:
m_RedSlider.value = value;
break;
}
m_PropertyInfo.SetValue(m_Node, m_ChannelMixer, null);
this.MarkDirtyRepaint();
}
void OnClickButton(int outChannel)
{
m_OutChannel = outChannel;
ResetSliders();
}
Vector3 GetOutputChannel()
{
switch (m_OutChannel)
{
case 1:
return m_ChannelMixer.outGreen;
case 2:
return m_ChannelMixer.outBlue;
default:
return m_ChannelMixer.outRed;
}
}
}
}