使用UnityShader实现序列帧

使用UnityShader实现序列帧

实现原理------------------------------------------------------------------------------------

1. 正确计算UV的偏移即可

 fixed4 frag (v2f i) : SV_Target
            {
				float width= 1 / _SizeX;
			    float height = 1 / _SizeY;

				float2 finalUV = i.uv;
				finalUV.x *= 1 / _SizeX;
				finalUV.y*= 1 / _SizeY;
	
				int index = _Time.y*_Speed;
				int xIndex = fmod(index, _SizeX);
				int yIndex = index/ _SizeX;

				finalUV.x += xIndex * width;
				finalUV.y += yIndex * height;

                fixed4 col = tex2D(_MainTex, finalUV);
              
                return col;
            }