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// Amplify Shader Editor - Visual Shader Editing Tool
// Copyright (c) Amplify Creations, Lda <info@amplify.pt>
//
// Donated by BinaryCats
// https://forum.unity.com/threads/best-tool-asset-store-award-amplify-shader-editor-node-based-shader-creation-tool.430959/page-60#post-3414465
//////////////////////
// README / HOW TO USE
//////////////////////
// Examples:
//
// Floats:
//
// x Equals value
// EditableIf( _float1, Equalto, 1)
// This will allow the value to be edited, if the property _float1 is equal to 1. (_float1==1)
// Note: NotEqualTo is also a valid argument which will do the opposite of this example.EditableIf(_float1, NotEqualTo, 1) (NotEqualTo != 1)
//
// x Greater than value
// EditableIf(_Float1,GreaterThan,1)
// This will allow the value to be edited if the property _float1 is Greater than 1. (_float1>1)
//
// x Greater Than Or Equal to value
// EditableIf(_Float1,GreaterThanOrEqualTo,1)
// This will allow the value to be edited if the property _float1 is Greater than or equal to 1. (_float1>=1)
//
//
// x Less Than value
// EditableIf(_Float1,LessThan,1)
// This will allow the value to be edited if the property _float1 is Less than 1. (_float1<1)
//
// x Less Than Or Equal to value
// EditableIf(_Float1,LessThanOrEqualTo,1)
// This will allow the value to be edited if the property _float1 is Less than or equal to 1. (_float1<=1)
//
//
// Colour:
//
// x Equals r,g,b,a
// EditableIf(_Color0,EqualTo,255,255,255,255)
// This will allow the value to be edited, if the property _Color0 R,G,B and A value all Equal 255. (_Color0.R==255 && _Color0.G==255 & _Color0.B == 255 && _Color0.A == 255)
//
// x Equals alpha
// EditableIf(_Color0,EqualTo,null,null,null,255)
// This will allow the value to be edited, if the property _Color0 Alpha value is Equal to 255. (_Color0.A == 255)
//
// a Greater than blue
// EditableIf(_Color0,GreaterThan,null,null,125)
// This will allow the value to be edited, if the property _Color0 Blue value is Greater Than 125. (_Color0.B > 125)
// Note: as I do not want to check the Red or Green Values, i have entered "null" for the parameter
// Note: I have not inputted a value to check for Alpha, as i do not want to check it. Simularly, if I wanted to Only check the Red Value I could have used EditableIf(_Color0,GreaterThan,125)
//
// Like wise with floats GreaterThanOrEqualTo, LessThan, LessThanOrEqualTo
//
// Vector:
// Vector Checks work the same as colour checks
//
// Texture:
// x Does Not have a Texture
// EditableIf(_TextureSample0,Equals,null)
// This will allow the value to be edited, if the property _TextureSample0 does NOT have a texture
//
// x Does have a Texture
// EditableIf(_TextureSample0,NotEqualTo,null)
// This will allow the value to be edited, if the property _TextureSample0 does have a texture
using UnityEngine;
using UnityEditor;
using System;
public enum ComparisonOperators
{
EqualTo, NotEqualTo, GreaterThan, LessThan, EqualsOrGreaterThan, EqualsOrLessThan, ContainsFlags,
DoesNotContainsFlags
}
public class EditableIf : MaterialPropertyDrawer
{
ComparisonOperators op;
string FieldName = "";
object ExpectedValue;
bool InputError;
public EditableIf()
{
InputError = true;
}
public EditableIf( object fieldname, object comparison, object expectedvalue )
{
if( expectedvalue.ToString().ToLower() == "true" )
{
expectedvalue = (System.Single)1;
}
else if( expectedvalue.ToString().ToLower() == "false" )
{
expectedvalue = (System.Single)0;
}
Init( fieldname, comparison, expectedvalue );
}
public EditableIf( object fieldname, object comparison, object expectedvaluex, object expectedvaluey )
{
float? x = expectedvaluex as float?;
float? y = expectedvaluey as float?;
float? z = float.NegativeInfinity;
float? w = float.NegativeInfinity;
x = GetVectorValue( x );
y = GetVectorValue( y );
Init( fieldname, comparison, new Vector4( x.Value, y.Value, z.Value, w.Value ) );
}
public EditableIf( object fieldname, object comparison, object expectedvaluex, object expectedvaluey, object expectedvaluez )
{
float? x = expectedvaluex as float?;
float? y = expectedvaluey as float?;
float? z = expectedvaluez as float?;
float? w = float.NegativeInfinity;
x = GetVectorValue( x );
y = GetVectorValue( y );
z = GetVectorValue( z );
Init( fieldname, comparison, new Vector4( x.Value, y.Value, z.Value, w.Value ) );
}
public EditableIf( object fieldname, object comparison, object expectedvaluex, object expectedvaluey, object expectedvaluez, object expectedvaluew )
{
var x = expectedvaluex as float?;
var y = expectedvaluey as float?;
var z = expectedvaluez as float?;
var w = expectedvaluew as float?;
x = GetVectorValue( x );
y = GetVectorValue( y );
z = GetVectorValue( z );
w = GetVectorValue( w );
Init( fieldname, comparison, new Vector4( x.Value, y.Value, z.Value, w.Value ) );
}
private void Init( object fieldname, object comparison, object expectedvalue )
{
FieldName = fieldname.ToString();
var names = Enum.GetNames( typeof( ComparisonOperators ) );
var name = comparison.ToString().ToLower().Replace( " ", "" );
for( int i = 0; i < names.Length; i++ )
{
if( names[ i ].ToLower() == name )
{
op = (ComparisonOperators)i;
break;
}
}
ExpectedValue = expectedvalue;
}
private static float? GetVectorValue( float? x )
{
if( x.HasValue == false )
{
x = float.NegativeInfinity;
}
return x;
}
// Draw the property inside the given rect
public override void OnGUI( Rect position, MaterialProperty prop, String label, MaterialEditor editor )
{
if( InputError )
{
EditorGUI.LabelField( position, "EditableIf Attribute Error: Input parameters are invalid!" );
return;
}
var LHSprop = MaterialEditor.GetMaterialProperty( prop.targets, FieldName );
if( string.IsNullOrEmpty( LHSprop.name ) )
{
LHSprop = MaterialEditor.GetMaterialProperty( prop.targets, "_" + FieldName.Replace( " ", "" ) );
if( string.IsNullOrEmpty( LHSprop.name ) )
{
EditorGUI.LabelField( position, "EditableIf Attribute Error: " + FieldName + " Does not exist!" );
return;
}
}
object LHSVal = null;
bool test = false;
switch( LHSprop.type )
{
case MaterialProperty.PropType.Color:
case MaterialProperty.PropType.Vector:
LHSVal = LHSprop.type == MaterialProperty.PropType.Color ? (Vector4)LHSprop.colorValue : LHSprop.vectorValue;
var v4 = ExpectedValue as Vector4?;
v4 = v4.HasValue ? v4 : new Vector4( (System.Single)ExpectedValue, float.NegativeInfinity, float.NegativeInfinity, float.NegativeInfinity );
if( LHSprop.type == MaterialProperty.PropType.Color )
{
test = VectorCheck( (Vector4)LHSVal, op, v4 / 255 );
}
else
test = VectorCheck( (Vector4)LHSVal, op, v4 );
break;
case MaterialProperty.PropType.Range:
case MaterialProperty.PropType.Float:
LHSVal = LHSprop.floatValue;
test = ( Check( LHSVal, op, ExpectedValue ) );
break;
case MaterialProperty.PropType.Texture:
LHSVal = LHSprop.textureValue;
test = ( CheckObject( LHSVal, op, ExpectedValue ) );
break;
}
GUI.enabled = test;
editor.DefaultShaderProperty( position, prop, label );
GUI.enabled = true;
}
private bool VectorCheck( Vector4 LHS, ComparisonOperators op, object expectedValue )
{
var RHS = (Vector4)expectedValue;
if( RHS.x != float.NegativeInfinity )
{
if( !Check( LHS.x, op, RHS.x ) )
return false;
}
if( RHS.y != float.NegativeInfinity )
{
if( !Check( LHS.y, op, RHS.y ) )
return false;
}
if( RHS.z != float.NegativeInfinity )
{
if( !Check( LHS.z, op, RHS.z ) )
return false;
}
if( RHS.w != float.NegativeInfinity )
{
if( !Check( LHS.w, op, RHS.w ) )
return false;
}
return true;
}
protected bool Check( object LHS, ComparisonOperators op, object RHS )
{
if( !( LHS is IComparable ) || !( RHS is IComparable ) )
throw new Exception( "Check using non basic type" );
switch( op )
{
case ComparisonOperators.EqualTo:
return ( (IComparable)LHS ).CompareTo( RHS ) == 0;
case ComparisonOperators.NotEqualTo:
return ( (IComparable)LHS ).CompareTo( RHS ) != 0;
case ComparisonOperators.EqualsOrGreaterThan:
return ( (IComparable)LHS ).CompareTo( RHS ) >= 0;
case ComparisonOperators.EqualsOrLessThan:
return ( (IComparable)LHS ).CompareTo( RHS ) <= 0;
case ComparisonOperators.GreaterThan:
return ( (IComparable)LHS ).CompareTo( RHS ) > 0;
case ComparisonOperators.LessThan:
return ( (IComparable)LHS ).CompareTo( RHS ) < 0;
case ComparisonOperators.ContainsFlags:
return ( (int)LHS & (int)RHS ) != 0; // Dont trust LHS values, it has been casted to a char and then to an int again, first bit will be the sign
case ComparisonOperators.DoesNotContainsFlags:
return ( ( (int)LHS & (int)RHS ) == (int)LHS ); // Dont trust LHS values, it has been casted to a char and then to an int again, first bit will be the sign
default:
break;
}
return false;
}
private bool CheckObject( object LHS, ComparisonOperators comparasonOperator, object RHS )
{
switch( comparasonOperator )
{
case ComparisonOperators.EqualTo:
return ( LHS == null );
case ComparisonOperators.NotEqualTo:
return ( LHS != null );
}
return true;
}
}
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