Glowing light [HELP] :'(
Hi. i am just creating a 2d light bar(or you can say a rod of light) in unity. i have no idea how to do it. I have actually used light shader script to get the bar to glow. is there any other way to do it other than that?
the light bar must glow inside the bar. the background can be white or light colours. How to make it glow in that case? (the light bar will be moving up and down)
Any help will be highly appreciated. thankyou
Answer by dan_wipf · Apr 03, 2019 at 05:52 AM
i find this asset on github quite usefull for 2d sprite glowing, maybe it helps you aswell!
or try this with sprites
Shader "Sprites/ShinyDefault"
{
Properties
{
[PerRendererData] _MainTex("Sprite Texture", 2D) = "white" {}
_Color("Tint", Color) = (1,1,1,1)
_ShineLocation("ShineLocation", Range(0,1)) = 0
_ShineWidth("ShineWidth", Range(0,1)) = 0
[MaterialToggle] PixelSnap("Pixel snap", Float) = 0
}
SubShader
{
Tags
{
"Queue" = "Transparent"
"IgnoreProjector" = "True"
"RenderType" = "Transparent"
"PreviewType" = "Plane"
"CanUseSpriteAtlas" = "True"
}
Cull Off
Lighting Off
ZWrite Off
Blend One OneMinusSrcAlpha
Pass
{
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#pragma multi_compile _ PIXELSNAP_ON
#include "UnityCG.cginc"
struct appdata_t
{
float4 vertex : POSITION;
float4 color : COLOR;
float2 texcoord : TEXCOORD0;
};
struct v2f
{
float4 vertex : SV_POSITION;
fixed4 color : COLOR;
float2 texcoord : TEXCOORD0;
};
fixed4 _Color;
v2f vert(appdata_t IN)
{
v2f OUT;
OUT.vertex = mul(UNITY_MATRIX_MVP, IN.vertex);
OUT.texcoord = IN.texcoord;
OUT.color = IN.color * _Color;
#ifdef PIXELSNAP_ON
OUT.vertex = UnityPixelSnap(OUT.vertex);
#endif
return OUT;
}
sampler2D _MainTex;
sampler2D _AlphaTex;
float _AlphaSplitEnabled;
float _ShineLocation;
float _ShineWidth;
fixed4 SampleSpriteTexture(float2 uv)
{
fixed4 color = tex2D(_MainTex, uv);
#if UNITY_TEXTURE_ALPHASPLIT_ALLOWED
if (_AlphaSplitEnabled)
color.a = tex2D(_AlphaTex, uv).r;
#endif //UNITY_TEXTURE_ALPHASPLIT_ALLOWED
float lowLevel = _ShineLocation - _ShineWidth;
float highLevel = _ShineLocation + _ShineWidth;
float currentDistanceProjection = (uv.x + uv.y) / 2;
if (currentDistanceProjection > lowLevel && currentDistanceProjection < highLevel) {
float whitePower = 1- (abs(currentDistanceProjection - _ShineLocation ) / _ShineWidth);
color.rgb += color.a * whitePower;
}
return color;
}
fixed4 frag(v2f IN) : SV_Target
{
fixed4 c = SampleSpriteTexture(IN.texcoord) * IN.color;
c.rgb *= c.a;
return c;
}
ENDCG
}
}
}
wouldnt there be performance issue(more memory consumption) if we turn the hdr on?
There will be a large overhead on my simple 2d game, dont you think?
Hi again. thankyou so much. But can you explain please what this actually is?
im new to this shader stuff. so i should just put this in shader script and attach it to the sprite?
Your answer
![](https://koobas.hobune.stream/wayback/20220612194745im_/https://answers.unity.com/themes/thub/images/avi.jpg)
Follow this Question
Related Questions
Unity 2D - Material for light 2 Answers
Standard Shader Emissive Warning? 2 Answers
Weird graphic bug 0 Answers