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Question by
clovergruff · Nov 09, 2016 at 10:29 PM ·
shaderprogrammingglitcheffect
Something weird is happening with my vertex shader...
Hi!
I'm quite new to programming shaders, so I'm still learning. I was trying to create a shader that reproduces a "Fisheye Lens" effect, similar to one found in an old cancelled game calledSonic Xtreme. While I got the effect working somewhat well, I got some weird artifacts going on. Example here: https://gyazo.com/5f13465fe8598d27ae87667aaa41de14
Here's the shader:
Shader "Mars/Surface" {
Properties {
_Color ("Color", Color) = (1,1,1,1)
_MainTex ("Albedo (RGB)", 2D) = "white" {}
_Glossiness ("Smoothness", Range(0,1)) = 0.5
_Metallic ("Metallic", Range(0,1)) = 0.0
_Depth ("Depth", Float) = 10
_Range ("Range", Range(0,1)) = 0.1
}
SubShader {
Tags { "RenderType"="Opaque" }
LOD 200
CGPROGRAM
// Physically based Standard lighting model, and enable shadows on all light types
#pragma surface surf Standard fullforwardshadows vertex:vert
// Use shader model 3.0 target, to get nicer looking lighting
#pragma target 3.0
sampler2D _MainTex;
float _Depth;
float _Range;
struct Input {
float2 uv_MainTex;
half4 color : COLOR;
float4 pos : SV_POSITION;
};
half _Glossiness;
half _Metallic;
fixed4 _Color;
void vert(inout appdata_full v, out Input o)
{
UNITY_INITIALIZE_OUTPUT(Input,o);
o.color = v.color;
v.vertex.z *= 2;
float horScale = cos((v.vertex.x - _WorldSpaceCameraPos.x) * _Range);
float verScale = cos((v.vertex.y - _WorldSpaceCameraPos.y) * _Range);
v.vertex.z += abs((horScale * _Depth
+ verScale * _Depth - _Depth * 2));
o.pos = UnityObjectToClipPos(v.vertex);
//o.uv = TRANSFORM_TEX(v.uv, _MainTex);
//v.vertex.x -= horScale;
//v.vertex.y -= verScale;
}
void surf (Input IN, inout SurfaceOutputStandard o)
{
// Albedo comes from a texture tinted by color
fixed4 c = tex2D (_MainTex, IN.uv_MainTex) * _Color;
o.Albedo = c.rgb * IN.color;
// Metallic and smoothness come from slider variables
o.Metallic = _Metallic;
o.Smoothness = _Glossiness;
o.Alpha = c.a;
}
ENDCG
}
FallBack "Diffuse"
}
Hope anyone can help me out here. :)
Thanks!
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