Added selected object highlight (#4)

* Create Outline.shader * Update TransformGizmo.cs

Author: HiddenMonk

Assets/RuntimeGizmo/Shader/Resources/Outline.shader

@@ -0,0 +1,57 @@
+//Taken and modified from github.com/Shrimpey/Outlined-Diffuse-Shader-Fixed/blob/master/CustomOutline.shader
+
+Shader "Custom/Outline" {
+Properties {
+_OutlineColor ("Outline Color", Color) = (1,.5,0,1)
+_Outline ("Outline width", Range (0, 1)) = .1
+}
+ 
+CGINCLUDE
+#include "UnityCG.cginc"
+ 
+struct appdata {
+float4 vertex : POSITION;
+float3 normal : NORMAL;
+};
+ 
+struct v2f {
+float4 pos : POSITION;
+float4 color : COLOR;
+};
+ 
+uniform float _Outline;
+uniform float4 _OutlineColor;
+ 
+v2f vert(appdata v) {
+// just make a copy of incoming vertex data but scaled according to normal direction
+v2f o;
+
+v.vertex *= ( 1 + _Outline);
+
+o.pos = UnityObjectToClipPos(v.vertex);
+ 
+o.color = _OutlineColor;
+return o;
+}
+ENDCG
+ 
+SubShader {
+Tags { "DisableBatching" = "True" }
+Pass {
+Name "OUTLINE"
+Tags {"LightMode" = "Always" }
+Cull Front
+ZWrite On
+ColorMask RGB
+Blend SrcAlpha OneMinusSrcAlpha
+ 
+CGPROGRAM
+#pragma vertex vert
+#pragma fragment frag
+half4 frag(v2f i) :COLOR { return i.color; }
+ENDCG
+}
+}
+ 
+Fallback "Diffuse"
+}

Assets/RuntimeGizmo/TransformGizmo.cs

@@ -57,13 +57,20 @@ public class TransformGizmo : MonoBehaviour
 Camera myCamera;
 
 static Material lineMaterial;
+static Material outlineMaterial;
+static string outlineMaterialName = "TransformGizmoOutlineMaterial";
 
 void Awake()
 {
 myCamera = GetComponent<Camera>();
 SetMaterial();
 }
 
+void OnDisable()
+{
+SetTarget(null); //Just so things gets cleaned up, such as removing any materials we placed on objects.
+}
+
 void Update()
 {
 SetSpaceAndType();
@@ -303,14 +310,65 @@ void GetTarget()
 RaycastHit hitInfo; 
 if(Physics.Raycast(myCamera.ScreenPointToRay(Input.mousePosition), out hitInfo))
 {
-target = hitInfo.transform;
-SetPivotPoint();
+SetTarget(hitInfo.transform);
 }else{
-target = null;
+SetTarget(null);
 }
 }
 }
 
+void SetTarget(Transform newTarget)
+{
+if(target != null)
+{
+SetHighlighTarget(false);
+}
+
+target = newTarget;
+
+if(target != null)
+{
+SetHighlighTarget(true);
+SetPivotPoint();
+}
+}
+
+List<Renderer> renderersBuffer = new List<Renderer>();
+List<Material> materialsBuffer = new List<Material>();
+void SetHighlighTarget(bool isHighlighted)
+{
+if(target != null)
+{
+renderersBuffer.Clear();
+target.GetComponentsInChildren<Renderer>(true, renderersBuffer);
+
+for(int i = 0; i < renderersBuffer.Count; i++)
+{
+Renderer render = renderersBuffer[i];
+materialsBuffer.Clear();
+materialsBuffer.AddRange(render.sharedMaterials);
+
+if(isHighlighted)
+{
+if(!materialsBuffer.Contains(outlineMaterial))
+{
+materialsBuffer.Add(outlineMaterial);
+render.materials = materialsBuffer.ToArray();
+}
+}else{
+if(materialsBuffer.Contains(outlineMaterial))
+{
+materialsBuffer.Remove(outlineMaterial);
+render.materials = materialsBuffer.ToArray();
+}
+}
+}
+
+renderersBuffer.Clear();
+materialsBuffer.Clear();
+}
+}
+
 void SetPivotPoint()
 {
 if(target != null)
@@ -677,30 +735,7 @@ void SetMaterial()
 if(lineMaterial == null)
 {
 lineMaterial = new Material(Shader.Find("Custom/Lines"));
-#region Shader code
-/*
-Shader "Custom/Lines"
-{
-SubShader
-{
-Pass
-{
-Blend SrcAlpha OneMinusSrcAlpha
-ZWrite Off
-ZTest Always
-Cull Off
-Fog { Mode Off }
-
-BindChannels
-{
-Bind "vertex", vertex
-Bind "color", color
-}
-}
-}
-}
-*/
-#endregion
+outlineMaterial = new Material(Shader.Find("Custom/Outline"));
 }
 }