// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'

// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'

Shader "MyPSX/psxVertexLit" {
	Properties{
	_MainTex("Base (RGB)", 2D) = "white" {}
	}
		SubShader{
			Tags { "RenderType" = "Opaque" }
		//Tags{ "Queue" = "Transparent" "RenderType" = "Transparent" }
			LOD 200

			Pass {
		//Blend SrcAlpha OneMinusSrcAlpha
		//Cull Off
		//ZWrite Off

			Lighting On
				CGPROGRAM

					#pragma vertex vert
					#pragma fragment frag
//#pragma surface surf BlinnPhong
#pragma multi_compile_instancing
//#pragma vertex wfiVertCol
//#pragma fragment passThrough

					#include "UnityCG.cginc"

					struct v2f
					{
						UNITY_VERTEX_INPUT_INSTANCE_ID
						fixed4 pos : SV_POSITION;
						half4 color : COLOR0;
						half4 colorFog : COLOR1;
						float2 uv_MainTex : TEXCOORD0;
						half3 normal : TEXCOORD1;
					};

					float4 _MainTex_ST;
					uniform half4 unity_FogStart;
					uniform half4 unity_FogEnd;


					v2f vert(appdata_full v)
					{
						UNITY_SETUP_INSTANCE_ID(v);
						v2f o;

						//Vertex snapping

						float4 snapToPixel = UnityObjectToClipPos(v.vertex);
						float4 vertex = snapToPixel;
						vertex.xyz = snapToPixel.xyz / snapToPixel.w;
						vertex.x = floor(256 * vertex.x) / 256;//250
						vertex.y = floor(256 * vertex.y) / 256;//250
						vertex.xyz *= snapToPixel.w;

						o.pos = vertex;

						//v.vertex.x += 0.05 * (step(0.5, sin(_Time.y * 2.0 + v.vertex.y * 1.0)) * step(6.99, sin(_Time.y*60 * 0.5)));

						//Vertex lighting
					//	o.color =  float4(ShadeVertexLights(v.vertex, v.normal), 1.0);
						o.color = float4(ShadeVertexLightsFull(v.vertex, v.normal, 4, true), 1);
						o.color *= v.color;

						//float distance = length(mul(UNITY_MATRIX_MV,v.vertex));
						float distance = length(UnityObjectToClipPos(v.vertex));

						//Affine Texture Mapping
					//	float4 affinePos = vertex; //vertex;
						o.uv_MainTex = TRANSFORM_TEX(v.texcoord, _MainTex);
					//	o.uv_MainTex *= distance + ((vertex.w/128) / distance / 2);//8 2
					//	o.normal = distance + ((vertex.w/128) / distance / 2);//8 2
						//Fog
						float4 fogColor = unity_FogColor;

						float fogDensity = (unity_FogEnd - distance) / (unity_FogEnd - unity_FogStart);
						o.normal.g = fogDensity;
						o.normal.b = 1;

						o.colorFog = fogColor;
						o.colorFog.a = clamp(fogDensity,0,1);

						//Cut out polygons
						if (distance > unity_FogStart.z + unity_FogColor.a * 255)
						{
							o.pos.w = 0;
						}

						return o;
					}



					sampler2D _MainTex;

					float4 frag(v2f IN) : COLOR
					{
						half4 c = tex2D(_MainTex, IN.uv_MainTex)*IN.color;//tex2D(_MainTex, IN.uv_MainTex / IN.normal.r)*IN.color;
						half4 color = c*(IN.colorFog.a);
						color.rgb += IN.colorFog.rgb*(1 - IN.colorFog.a);



						return color;
					}
				ENDCG
			}
	}
}