143 lines
2.8 KiB
Text
143 lines
2.8 KiB
Text
Shader "CrispyPin/WireWorld"
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{
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Properties
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{
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_LastFrame ("Texture", 2D) = "white" {}
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[Toggle]
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_Running ("Running", Int) = 0
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}
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SubShader
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{
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Tags { "RenderType"="Opaque" }
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LOD 100
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Pass
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{
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CGPROGRAM
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#pragma vertex vert
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#pragma fragment frag
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#include "UnityCG.cginc"
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struct appdata
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{
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float4 vertex : POSITION;
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float2 uv : TEXCOORD0;
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UNITY_VERTEX_INPUT_INSTANCE_ID
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};
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struct v2f
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{
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float2 uv : TEXCOORD0;
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float4 vertex : SV_POSITION;
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UNITY_VERTEX_OUTPUT_STEREO
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};
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sampler2D _LastFrame;
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int _Running;
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v2f vert (appdata v)
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{
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v2f o;
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UNITY_SETUP_INSTANCE_ID(v);
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UNITY_INITIALIZE_OUTPUT(v2f, o);
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UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(o);
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o.vertex = UnityObjectToClipPos(v.vertex);
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o.uv = v.uv;
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return o;
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}
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int close(float4 a, float4 b) {
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return dot(normalize(a), normalize(b)) > 0.95;
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}
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#define EMPTY 0
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#define WIRE 1
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#define SIGNAL 2
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#define TAIL 3
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#define UNKNOWN 4
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#define C_EMPTY float4(0, 0, 0, 1)
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#define C_WIRE float4(1, 0.5, 0, 1)
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#define C_SIGNAL float4(0.5, 0.5, 1, 1)
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#define C_TAIL float4(0.5, 1, 0.5, 1)
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int value(float2 center, float x, float y) {
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fixed4 col = tex2D(_LastFrame, center + float2(x, y));
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col = sqrt(col);
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// col = col*col;
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col.a = 1;
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if (close(col, C_SIGNAL)) {
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return SIGNAL;
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}
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if (close(col, C_TAIL)) {
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return TAIL;
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}
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if (close(col, C_WIRE)) {
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return WIRE;
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}
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return EMPTY;
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}
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fixed4 frag (v2f i) : SV_Target
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{
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const float resolution = 32.0;
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const float d = 1.0/resolution;
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float t = tex2D(_LastFrame, 0).r;
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if (i.uv.x < d && i.uv.y < d) {
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if (t > 0.9) {
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return float4(0, 0, 0, 1);
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}
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t += unity_DeltaTime.x * 4;
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return float4(t, t, t, 1);
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}
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int old_state = value(i.uv, 0, 0) ;
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if (old_state == EMPTY) {
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return C_EMPTY * C_EMPTY;
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}
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if (t > 0 || _Running == 0) {
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if (old_state == SIGNAL) {
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return C_SIGNAL * C_SIGNAL;
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}
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if (old_state == TAIL) {
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return C_TAIL * C_TAIL;
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}
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return C_WIRE * C_WIRE;
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}
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if (old_state == SIGNAL) {
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// return C_SIGNAL * C_SIGNAL;
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return C_TAIL * C_TAIL;
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}
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if (old_state == TAIL) {
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// return C_TAIL * C_TAIL;
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return C_WIRE * C_WIRE;
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}
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int count =
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(int)(value(i.uv, -d, -d) == SIGNAL) +
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(int)(value(i.uv, 0, -d) == SIGNAL) +
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(int)(value(i.uv, d, -d) == SIGNAL) +
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(int)(value(i.uv, -d, 0) == SIGNAL) +
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(int)(value(i.uv, d, 0) == SIGNAL) +
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(int)(value(i.uv, -d, d) == SIGNAL) +
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(int)(value(i.uv, 0, d) == SIGNAL) +
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(int)(value(i.uv, d, d) == SIGNAL) ;
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if (count == 1 || count == 2){
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return C_SIGNAL * C_SIGNAL;
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}
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return C_WIRE * C_WIRE;
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}
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ENDCG
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}
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}
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}
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