Hello all,
I'm trying to create a wireframe shader with inner color. So it's not transparent but has a color. So I have this shader:
Shader "Custom/TransparentSingleColorShader" {
Properties{
_Color("Color", Color) = (1.0, 1.0, 1.0, 1.0)
[PowerSlider(3.0)]
_WireframeVal("Wireframe width", Range(0., 0.5)) = 0.05
_FrontColor("Front color", color) = (1., 1., 1., 1.)
_BackColor("Back color", color) = (1., 1., 1., 1.)
[Toggle] _RemoveDiag("Remove diagonals?", Float) = 0.
}
SubShader
{
Tags { "Queue" = "Geometry" "RenderType" = "Opaque" }
Pass
{
Cull Front
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#pragma geometry geom
// Change "shader_feature" with "pragma_compile" if you want set this keyword from c# code
#pragma shader_feature __ _REMOVEDIAG_ON
#include "UnityCG.cginc"
struct v2g {
float4 worldPos : SV_POSITION;
};
struct g2f {
float4 pos : SV_POSITION;
float3 bary : TEXCOORD0;
};
v2g vert(appdata_base v) {
v2g o;
o.worldPos = mul(unity_ObjectToWorld, v.vertex);
return o;
}
[maxvertexcount(3)]
void geom(triangle v2g IN[3], inout TriangleStream triStream) {
float3 param = float3(0., 0., 0.);
#if _REMOVEDIAG_ON
float EdgeA = length(IN[0].worldPos - IN[1].worldPos);
float EdgeB = length(IN[1].worldPos - IN[2].worldPos);
float EdgeC = length(IN[2].worldPos - IN[0].worldPos);
if (EdgeA > EdgeB && EdgeA > EdgeC)
param.y = 1.;
else if (EdgeB > EdgeC && EdgeB > EdgeA)
param.x = 1.;
else
param.z = 1.;
#endif
g2f o;
o.pos = mul(UNITY_MATRIX_VP, IN[0].worldPos);
o.bary = float3(1., 0., 0.) + param;
triStream.Append(o);
o.pos = mul(UNITY_MATRIX_VP, IN[1].worldPos);
o.bary = float3(0., 0., 1.) + param;
triStream.Append(o);
o.pos = mul(UNITY_MATRIX_VP, IN[2].worldPos);
o.bary = float3(0., 1., 0.) + param;
triStream.Append(o);
}
float _WireframeVal;
fixed4 _BackColor;
fixed4 frag(g2f i) : SV_Target {
if (!any(bool3(i.bary.x < _WireframeVal, i.bary.y < _WireframeVal, i.bary.z < _WireframeVal)))
discard;
return _BackColor;
}
ENDCG
}
Pass
{
Cull Back
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#pragma geometry geom
// Change "shader_feature" with "pragma_compile" if you want set this keyword from c# code
#pragma shader_feature __ _REMOVEDIAG_ON
#include "UnityCG.cginc"
struct v2g {
float4 worldPos : SV_POSITION;
};
struct g2f {
float4 pos : SV_POSITION;
float3 bary : TEXCOORD0;
};
v2g vert(appdata_base v) {
v2g o;
o.worldPos = mul(unity_ObjectToWorld, v.vertex);
return o;
}
[maxvertexcount(3)]
void geom(triangle v2g IN[3], inout TriangleStream triStream) {
float3 param = float3(0., 0., 0.);
#if _REMOVEDIAG_ON
float EdgeA = length(IN[0].worldPos - IN[1].worldPos);
float EdgeB = length(IN[1].worldPos - IN[2].worldPos);
float EdgeC = length(IN[2].worldPos - IN[0].worldPos);
if (EdgeA > EdgeB && EdgeA > EdgeC)
param.y = 1.;
else if (EdgeB > EdgeC && EdgeB > EdgeA)
param.x = 1.;
else
param.z = 1.;
#endif
g2f o;
o.pos = mul(UNITY_MATRIX_VP, IN[0].worldPos);
o.bary = float3(1., 0., 0.) + param;
triStream.Append(o);
o.pos = mul(UNITY_MATRIX_VP, IN[1].worldPos);
o.bary = float3(0., 0., 1.) + param;
triStream.Append(o);
o.pos = mul(UNITY_MATRIX_VP, IN[2].worldPos);
o.bary = float3(0., 1., 0.) + param;
triStream.Append(o);
}
float _WireframeVal;
fixed4 _FrontColor;
fixed4 frag(g2f i) : SV_Target {
if (!any(bool3(i.bary.x <= _WireframeVal, i.bary.y <= _WireframeVal, i.bary.z <= _WireframeVal)))
discard;
return _FrontColor;
}
ENDCG
}
}
SubShader{
Tags { "RenderType" = "Transparent" "Queue" = "Transparent" }
Blend SrcAlpha OneMinusSrcAlpha
Cull Off
LOD 200
CGPROGRAM
#pragma surface surf Lambert
fixed4 _Color;
// Note: pointless texture coordinate. I couldn't get Unity (or Cg)
// to accept an empty Input structure or omit the inputs.
struct Input {
float2 uv_MainTex;
};
void surf(Input IN, inout SurfaceOutput o) {
o.Albedo = _Color.rgb;
o.Emission = _Color.rgb; // * _Color.a;
o.Alpha = _Color.a;
}
ENDCG
}
FallBack "Diffuse"
}
The first two passes dealing with wireframe and it has two colors.
the last subshader is dealing with color that is filing the cube, but it's not working... it's transparent.
![alt text][1]
[1]: /storage/temp/132542-colorrenderingissue.png
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