Test for gles20

Author: vanifatovvlad

Runtime/Scripts/MeshAnimator.cs

@@ -19,6 +19,8 @@ public class MeshAnimator : MonoBehaviour
         private void Awake()
         {
             _propertyBlock = new MaterialPropertyBlock();
+            
+            MeshCache.GenerateSecondaryUv(this.meshRenderer.GetComponent<MeshFilter>().sharedMesh);
         }
 
         [PublicAPI]

Runtime/Scripts/MeshCache.cs

@@ -0,0 +1,23 @@
+namespace CodeWriter.MeshAnimation {
+    using System.Collections.Generic;
+    using UnityEngine;
+
+    public static class MeshCache {
+        private static readonly HashSet<Mesh> CachedUv = new HashSet<Mesh>();
+
+        public static void GenerateSecondaryUv(Mesh mesh) {
+            if (CachedUv.Contains(mesh)) {
+                return;
+            }
+
+            CachedUv.Add(mesh);
+
+            var uvs = new Vector2[mesh.vertexCount];
+            for (int i = 0; i < uvs.Length; i++) {
+                uvs[i] = new Vector2(1f * i, 0);
+            }
+
+            mesh.SetUVs(1, uvs);
+        }
+    }
+}

Runtime/Scripts/MeshCache.cs.meta

@@ -16,7 +16,7 @@ Shader "Mobile/Diffuse (Mesh Animation)" {
         CGPROGRAM
         #pragma surface surf Lambert noforwardadd vertex:vert
         #pragma multi_compile_instancing 
-        #pragma target 3.5
+        #pragma target 2.5
         #pragma require samplelod
 
         sampler2D _MainTex;
@@ -36,8 +36,8 @@ Shader "Mobile/Diffuse (Mesh Animation)" {
             float4 vertex : POSITION;
             float3 normal : NORMAL;
             float2 texcoord : TEXCOORD0;
+            float2 vertcoord: TEXCOORD1;
             float4 color : COLOR0;
-            uint vertexId : SV_VertexID;
             UNITY_VERTEX_INPUT_INSTANCE_ID
         };
 
@@ -53,7 +53,7 @@ Shader "Mobile/Diffuse (Mesh Animation)" {
 
             float progress = (_Time.y - t.w) * t.z;
             float progress01 = lerp(saturate(progress), frac(progress), looping);
-            float2 coords = float2(0.5 + v.vertexId, 0.5 + t.x + progress01 * t.y) * _AnimTex_TexelSize.xy;
+            float2 coords = float2(0.5 + v.vertcoord.x, 0.5 + t.x + progress01 * t.y) * _AnimTex_TexelSize.xy;
             float4 position = tex2Dlod(_AnimTex, float4(coords, 0, 0)) * _AnimMul + _AnimAdd;
 
             v.vertex = float4(position.xyz, 1.0);

Runtime/Shaders/Mobile-Diffuse-MeshAnimation.shader

@@ -23,7 +23,7 @@
             #pragma fragment frag
             #pragma multi_compile_fog
             #pragma multi_compile_instancing 
-            #pragma target 3.5
+            #pragma target 2.5
             #pragma require samplelod
 
             #include "UnityCG.cginc"
@@ -32,7 +32,7 @@
             {
                 float4 vertex : POSITION;
                 float2 uv : TEXCOORD0;
-                uint vertexId : SV_VertexID;
+                float2 vertcoord: TEXCOORD1;
                 UNITY_VERTEX_INPUT_INSTANCE_ID
             };
 
@@ -65,7 +65,7 @@
 
                 float progress = (_Time.y - t.w) * t.z;
                 float progress01 = lerp(saturate(progress), frac(progress), looping);
-                float2 coords = float2(0.5 + v.vertexId, 0.5 + t.x + progress01 * t.y) * _AnimTex_TexelSize.xy;
+                float2 coords = float2(0.5 + v.vertcoord.x, 0.5 + t.x + progress01 * t.y) * _AnimTex_TexelSize.xy;
                 float4 position = tex2Dlod(_AnimTex, float4(coords, 0, 0)) * _AnimMul + _AnimAdd;
 
                 v.vertex = float4(position.xyz, 1.0);