Add shaders

Sources/Shaders/Debug_Tangents.shader

@@ -0,0 +1,31 @@
+// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'
+
+Shader "!Debug/Tangents" {
+SubShader {
+    Pass {
+        Fog { Mode Off }
+CGPROGRAM
+#pragma vertex vert
+#pragma fragment frag
+
+// vertex input: position, tangent
+struct appdata {
+    float4 vertex : POSITION;
+    float4 tangent : TANGENT;
+};
+
+struct v2f {
+    float4    pos : SV_POSITION;
+    fixed4    color : COLOR;
+};
+v2f vert (appdata v) {
+    v2f o;
+    o.pos = UnityObjectToClipPos( v.vertex );
+    o.color = v.tangent * 0.5 + 0.5;
+    return o;
+}
+fixed4 frag (v2f i) : COLOR0 { return i.color; }
+ENDCG
+    }
+}
+}