RaymarchingTemplate

Shader /*fileName*/"Raymarching/Template"/*end*/
{
    Properties
    {
        /*property*/
    }

    SubShader
    {
        Tags
        {
            "RenderType" = "Transparent"
            "Queue" = "Transparent+0"
            "IgnoreProjector" = "True"
            "IsEmissive" = "true"
            /*tags*/
        }

        LOD 100

        Pass
        {
            CGPROGRAM
            #pragma target 4.6
            #pragma vertex vert
            #pragma fragment frag
            #pragma fragmentoption ARB_precision_hint_fastest
            #pragma multi_compile_shadowcaster
            /*pragma*/

            #include "UnityCG.cginc"
            #include "Lighting.cginc"
            /*include*/

            /*fields*/

            float2 distanceFunction(float3 pos)
            {
               return /*distanceFunction*/float2(0, 0)/*end*/;
            }

            float4 materialFunction(float2 distance)
            {
                return /*materialFunction*/float4(0, 0, 0, 0)/*end*/;
            }

            float computeDepth(float3 pos)
            {
                float4 vpPos = UnityObjectToClipPos(float4(pos, 1.0));
                #if UNITY_UV_STARTS_AT_TOP
                    return vpPos.z / vpPos.w;
                #else
                    return (vpPos.z / vpPos.w) * 0.5 + 0.5;
                #endif
            }

            struct appdata
            {
                float4 vertex : POSITION;
                float2 uv : TEXCOORD0;
            };

            struct v2f
            {
                float2 uv : TEXCOORD0;
                float4 vertex : SV_POSITION;
                float3 pos : TEXCOORD1;
            };

            struct Ray
            {
                float3 org;
                float3 dir;
            };

            struct gbuffer_out
            {
                half4 color : SV_Target;
                float depth : SV_Depth;
            };

            v2f vert (appdata v)
            {
                v2f o;
                o.vertex = UnityObjectToClipPos(v.vertex);
                o.pos = v.vertex.xyz;
                return o;
            }

            gbuffer_out frag (v2f i)
            {
                float3 wpos = i.pos;
                Ray ray_center;
                ray_center.org = mul(unity_WorldToObject, float4(_WorldSpaceCameraPos, 1)).xyz;
                ray_center.dir = normalize(i.pos - ray_center.org);

                float t = 0.0;
                float2 distance = float2(0.0, 0.0);
                float3 posOnRay = ray_center.org;

                float maxStep = 64;

                for(int i = 0; i < maxStep; ++i)
                {
                    distance = distanceFunction(posOnRay);

                    t += distance.x;
                    posOnRay = ray_center.org + t * ray_center.dir;
                }

                gbuffer_out o;

                if(abs(distance.x) < 0.001)
                {
                    o.color = materialFunction(distance);
                }
                else discard;

                o.depth = computeDepth(posOnRay);
                return o;
            }
            ENDCG
        }
    }

    CustomEditor "Shiranui_Isuzu.RaymarchingEditor"
}