unity3d - 为移动设备优化球形遮罩着色器
问题描述
我使用了一个对移动性能来说非常重的着色器。有人可以帮助我改进它以获得更好的性能吗?
我注意到我使用这个着色器的 FPS 从 60 到 30。
Shader "Custom/Sphered2"
{Properties
{
[HDR] _Color ("Color", Color) = (1,1,1,1)
_MainTex ("Albedo (RGB)", 2D) = "white" {}
_ColorStrength("Color Strenth", Range(1,4)) = 1
_EmissionColor ("_EmissionColor Color", Color) = (1,1,1,1)
_EmissionTex ("_EmissionColor (RGB)", 2D) = "white" {}
_EmissionStrength("_EmissionColor Strenth", Range(0,4)) = 1
_Glossiness ("Smoothness", Range(0,1)) = 0.5
_Metallic ("Metallic", Range(0,1)) = 0.0
// _position ("World Position", Vector) = (0,0,0,0)
// _Radius ("Sphere Radius", Range(0,100)) = 0
//_Softness("Sphere Softness", Range(0,100)) = 0
}
SubShader
{
Tags { "RenderType"="Opaque" }
LOD 200
CGPROGRAM
// Physically based Standard lighting model, and enable shadows on all light types
#pragma surface surf Standard fullforwardshadows
// Use shader model 3.0 target, to get nicer looking lighting
#pragma target 3.0
sampler2D _MainTex,_EmissionTex;
struct Input
{
float2 uv_MainTex;
float2 uv_EmissionTex;
float3 worldPos;
};
half _Glossiness;
half _Metallic;
fixed4 _Color,_EmissionColor;
half _ColorStrength,_EmissionStrength;
uniform float4 GLOBALmask_position2;
uniform half GLOBALmask_Radius2;
uniform half GLOBALmask_Softness;
// Add instancing support for this shader. You need to check 'Enable Instancing' on materials that use the shader.
// See https://docs.unity3d.com/Manual/GPUInstancing.html for more information about instancing.
// #pragma instancing_options assumeuniformscaling
UNITY_INSTANCING_BUFFER_START(Props)
// put more per-instance properties here
UNITY_INSTANCING_BUFFER_END(Props)
void surf (Input IN, inout SurfaceOutputStandard o)
{
// Albedo comes from a texture tinted by color
fixed4 c = tex2D (_MainTex, IN.uv_MainTex) * _Color;
half grayscale = (c.r + c.g + c.b) * 0.333;
fixed3 cgg = fixed3(grayscale,grayscale,grayscale);
fixed4 e = tex2D (_EmissionTex, IN.uv_EmissionTex) * _EmissionColor *_EmissionStrength;
half d = distance(GLOBALmask_position2,IN.worldPos);
half sum = saturate((d - GLOBALmask_Radius2)/ -GLOBALmask_Softness);
fixed4 lerpColor = lerp(fixed4(cgg,1),c * _ColorStrength,sum);
fixed4 lerpEmission = lerp(fixed4(0,0,0,0),e,sum);
o.Albedo =c.rgb;
// Metallic and smoothness come from slider variables
o.Metallic = _Metallic;
o.Emission = lerpEmission.rgb;
o.Smoothness = _Glossiness;
o.Alpha = c.a;
}
ENDCG
}
FallBack "Diffuse"
}
我这样使用它:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class RayCastMovePos : MonoBehaviour
{
public Transform playerTransform;
public float radius2,sm;
public Vector4 myPos2;
void Update()
{
myPos2= new Vector4 ( playerTransform.position.x ,
playerTransform.position.y, playerTransform.position.z, 0);
//radius =Mathf .Clamp ( ( myVisualizer.allRythem
[0]+myVisualizer.allRythem [1]+myVisualizer.allRythem [2]) * 170,2,1000);
// radius2 =Mathf .Clamp ( ( myVisualizer.allRythem
[3]+myVisualizer.allRythem [4]+myVisualizer.allRythem [5]) * 150,2,1000);
Shader.SetGlobalVector ("GLOBALmask_position2", myPos2);
Shader.SetGlobalFloat ("GLOBALmask_Radius2", radius2);
Shader.SetGlobalFloat ("GLOBALmask_Softness", sm );
}
}
我是着色器的新手,但如果有任何关于发光精灵的建议,我会很高兴听到它。
解决方案
如果这是用于精灵,那么您真的需要使用表面着色器吗?这些包括大量的开销,如光照贴图支持、阴影投射/接收、前向光支持等。我确信顶点/片段着色器可以很好地满足您的目的。您只需在最终输出中添加额外的颜色即可获得发射。
下面是 Unity 精灵着色器的主体外观:
https://github.com/TwoTailsGames/Unity-Built-in-Shaders/blob/master/CGIncludes/UnitySprites.cginc
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