Unity Shader - Get Screen Pos

Unity Shader 中获取屏幕像素坐标

Coding

Shader "Unity Shaders Book/Chapter 4/Chapter4-ScreenXY" { SubShader { Pass { Tags { "RenderType"="Opaque" } CGPROGRAM #pragma vertex vert #pragma fragment frag #include "UnityCG.cginc" // method1: float4 vert(float4 vertex : POSITION) : SV_POSITION { return UnityObjectToClipPos(vertex); } fixed4 frag(float4 vertex : SV_POSITION) : SV_TARGET { return fixed4(vertex.xy / _ScreenParams.xy, 0, 1.0); } /*
			// method2:
			struct v2f
			{
				float4 pos : SV_POSITION;
				float4 screenPos : TEXCOORD0;
			};

			v2f vert(float4 vertex : POSITION)
			{
				v2f o = (v2f)0;
				o.pos = UnityObjectToClipPos(vertex);
				o.screenPos = ComputeScreenPos(o.pos);
				return o;
			}
			
			fixed4 frag(v2f i) : SV_TARGET
			{
				return fixed4(i.screenPos.xy / i.screenPos.w, 0, 1.0);
			}
			*/ /*
			// method3:
			float4 vert(float4 vertex : POSITION) : SV_POSITION
			{
				return UnityObjectToClipPos(vertex);
			}

			fixed4 frag(float4 sPos : VPOS) : SV_TARGET
			{
				return fixed4(sPos.xy / _ScreenParams.xy, 0, 1.0);
			}
			*/ ENDCG } } FallBack "Diffuse" } 

Effect

Project

Screen XY Move