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162 lines
4.6 KiB
162 lines
4.6 KiB
Shader "Unlit/OVROverlayDestRectEditor"
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{
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Properties
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{
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_MainTex ("Texture", 2D) = "white" {}
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_SrcRectLeft("SrcRectLeft", Vector) = (0,0,1,1)
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_SrcRectRight("SrcRectRight", Vector) = (0,0,1,1)
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_DestRectLeft ("DestRectLeft", Vector) = (0,0,1,1)
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_DestRectRight("DestRectRight", Vector) = (0,0,1,1)
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_BackgroundColor("Background Color", Color) = (0.225, 0.225, 0.225, 1)
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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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};
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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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float4 leftDragX : TEXCOORD1;
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float4 leftDragY : TEXCOORD2;
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float4 rightDragX : TEXCOORD3;
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float4 rightDragY : TEXCOORD4;
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};
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sampler2D _MainTex;
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float4 _MainTex_ST;
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float4 _SrcRectLeft;
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float4 _SrcRectRight;
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float4 _DestRectLeft;
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float4 _DestRectRight;
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fixed4 _BackgroundColor;
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v2f vert (appdata v)
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{
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v2f o;
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o.vertex = UnityObjectToClipPos(v.vertex);
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o.uv = TRANSFORM_TEX(v.uv, _MainTex);
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// Add padding
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o.uv = (o.uv - 0.5) * (256.0 + 8.0) / (256.0) + 0.5;
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// left
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o.leftDragX.x = _DestRectLeft.x;
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o.leftDragY.x = _DestRectLeft.y + _DestRectLeft.w * 0.5;
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// right
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o.leftDragX.y = _DestRectLeft.x + _DestRectLeft.z;
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o.leftDragY.y = _DestRectLeft.y + _DestRectLeft.w * 0.5;
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// top
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o.leftDragX.z = _DestRectLeft.x + _DestRectLeft.z * 0.5;
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o.leftDragY.z = _DestRectLeft.y;
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// bottom
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o.leftDragX.w = _DestRectLeft.x + _DestRectLeft.z * 0.5;
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o.leftDragY.w = _DestRectLeft.y + _DestRectLeft.w;
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// right
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o.rightDragX.x = _DestRectRight.x;
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o.rightDragY.x = _DestRectRight.y + _DestRectRight.w * 0.5;
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// right
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o.rightDragX.y = _DestRectRight.x + _DestRectRight.z;
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o.rightDragY.y = _DestRectRight.y + _DestRectRight.w * 0.5;
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// top
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o.rightDragX.z = _DestRectRight.x + _DestRectRight.z * 0.5;
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o.rightDragY.z = _DestRectRight.y;
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// bottom
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o.rightDragX.w = _DestRectRight.x + _DestRectRight.z * 0.5;
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o.rightDragY.w = _DestRectRight.y + _DestRectRight.w;
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return o;
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}
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float onDrag(float2 uv, float x, float y)
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{
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const float pixelSize = 6;
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return abs(uv.x - x) < ((pixelSize / 2) / 128.0) && abs(uv.y - y) < ((pixelSize / 2) / 128.0);
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}
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float onLine(float2 uv, float4 rect)
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{
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return
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(abs(uv.x - rect.x) < (1 / 128.0) && uv.y >= rect.y && uv.y <= rect.y + rect.w) ||
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(abs(uv.x - rect.x - rect.z) < (1 / 128.0) && uv.y >= rect.y && uv.y <= rect.y + rect.w) ||
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(abs(uv.y - rect.y) < (1 / 128.0) && uv.x >= rect.x && uv.x <= rect.x + rect.z) ||
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(abs(uv.y - rect.y - rect.w) < (1 / 128.0) && uv.x >= rect.x && uv.x <= rect.x + rect.z);
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}
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float checkerboard(float2 uv)
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{
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float x = floor(uv.x * (16 + 2));
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float y = floor(uv.y * 8);
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return 2 * ((x + y) / 2.0 - floor((x + y) / 2.0));
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}
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fixed4 frag (v2f i) : SV_Target
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{
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float isLeftEye = i.uv < 0.5;
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float2 leftUV = float2(i.uv.x * (256.0 + 32.0) / 128.0, 1 - i.uv.y);
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float2 rightUV = float2(1 - ((1 - i.uv.x) * (256.0 + 32.0) / 128.0), 1 - i.uv.y);
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float2 uv = i.uv;
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float2 textureUV = i.uv;
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if (isLeftEye)
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{
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uv = (leftUV - _DestRectLeft.xy) / _DestRectLeft.zw;
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textureUV = uv * _SrcRectLeft.zw + _SrcRectLeft.xy;
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}
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else
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{
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uv = (rightUV - _DestRectRight.xy) / _DestRectRight.zw;
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textureUV = uv * _SrcRectRight.zw + _SrcRectRight.xy;
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}
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// sample the texture
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fixed4 col = tex2D(_MainTex, float2(textureUV.x, 1 - textureUV.y));
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if (uv.x < 0 || uv.x > 1 || uv.y < 0 || uv.y > 1)
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{
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col.a = 0;
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}
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col.rgb = lerp(0.41 - 0.13 * checkerboard(i.uv), col.rgb, col.a);
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if (i.uv.x < 0 || i.uv.x > 1 || i.uv.y < 0 || i.uv.y > 1 || abs(i.uv.x - 0.5) < (14 / 256.0))
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{
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col = _BackgroundColor;
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}
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// now draw clipping objects
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float left = isLeftEye && (onLine(leftUV, _DestRectLeft) ||
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onDrag(leftUV, i.leftDragX.x, i.leftDragY.x) ||
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onDrag(leftUV, i.leftDragX.y, i.leftDragY.y) ||
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onDrag(leftUV, i.leftDragX.z, i.leftDragY.z) ||
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onDrag(leftUV, i.leftDragX.w, i.leftDragY.w));
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float right = (!isLeftEye) && (onLine(rightUV, _DestRectRight) ||
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onDrag(rightUV, i.rightDragX.x, i.rightDragY.x) ||
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onDrag(rightUV, i.rightDragX.y, i.rightDragY.y) ||
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onDrag(rightUV, i.rightDragX.z, i.rightDragY.z) ||
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onDrag(rightUV, i.rightDragX.w, i.rightDragY.w));
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return lerp(col, fixed4(left, right, 0, 1), left || right);
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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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