shader 绘制基本图形

圆形

Shader "IBShaders/IBDrawCircleShader"
{
    Properties
    {
        _Color("Color", Color) = (1,0,0,0)
        _Thickness("Thickness", Range(0.0,0.5)) = 0.05
        _Radius("Radius", Range(0.0, 0.5)) = 0.4
    }

    SubShader
    {
       Tags
       {
           "Queue" = "Transparent"
           "RenderType" = "Transparent"
       }

       Pass
       {
            // No culling or depth
           Cull Off ZWrite Off ZTest Always
           Blend SrcAlpha OneMinusSrcAlpha // Alpha blending
           CGPROGRAM
           #pragma vertex vert
           #pragma fragment frag
           #include "UnityCG.cginc"

           fixed4 _Color; // low precision type is usually enough for colors
           float _Thickness;
           float _Radius;

           struct fragmentInput
           {
              float4 pos : SV_POSITION;
              float2 uv : TEXCOORD0;
           };

           fragmentInput vert(appdata_base v)
           {
              fragmentInput o;

              o.pos = UnityObjectToClipPos(v.vertex);
              o.uv = v.texcoord.xy - fixed2(0.5,0.5);//转换为圆心坐标系

              return o;
           }

           float antialias(float radius, float borderSize, float dist)
           {
              float t =
                  smoothstep(radius + sign(dist- radius) * borderSize, radius, dist);
              return t;
           }

           fixed4 frag(fragmentInput i) : SV_Target
           {
              //float distance = sqrt(pow(i.uv.x, 2) + pow(i.uv.y,2));
              float distance = pow(i.uv.x, 2) + pow(i.uv.y,2);//画圆
              //float distance = max(abs(i.uv.x),abs(i.uv.y));//画框
              return fixed4(_Color.r, _Color.g, _Color.b, _Color.a*antialias(_Radius, _Thickness, distance));
              return _Color;
           }

           ENDCG
       }
    }
}

shader 绘制基本图形_第1张图片

 

 

矩形

Shader "IBShaders/IBDrawBorderShader"
{
    Properties
    {
        _Color("Color", Color) = (1,0,0,0)
        _Thickness("Thickness", Range(0.0,0.5)) = 0.05
        _Radius("Radius", Range(0.0, 0.5)) = 0.4
    }

    SubShader
    {
       Tags
       {
           "Queue" = "Transparent"
           "RenderType" = "Transparent"
       }

       Pass
       {
            // No culling or depth
           Cull Off ZWrite Off ZTest Always
           Blend SrcAlpha OneMinusSrcAlpha // Alpha blending
           CGPROGRAM
           #pragma vertex vert
           #pragma fragment frag
           #include "UnityCG.cginc"

           fixed4 _Color; // low precision type is usually enough for colors
           float _Thickness;
           float _Radius;

           struct fragmentInput
           {
              float4 pos : SV_POSITION;
              float2 uv : TEXCOORD0;
           };

           fragmentInput vert(appdata_base v)
           {
              fragmentInput o;

              o.pos = UnityObjectToClipPos(v.vertex);
              o.uv = v.texcoord.xy - fixed2(0.5,0.5);//转换为圆心坐标系

              return o;
           }

           float antialias(float radius, float borderSize, float dist)
           {
              float t =
                  smoothstep(radius + sign(dist- radius) * borderSize, radius, dist);
              return t;
           }

           fixed4 frag(fragmentInput i) : SV_Target
           {
              //float distance = sqrt(pow(i.uv.x, 2) + pow(i.uv.y,2));
              //float distance = pow(i.uv.x, 2) + pow(i.uv.y,2);//画圆
              float distance = max(abs(i.uv.x),abs(i.uv.y));//画框
              return fixed4(_Color.r, _Color.g, _Color.b, _Color.a*antialias(_Radius, _Thickness, distance));
              return _Color;
           }

           ENDCG
       }
    }
}

 

shader 绘制基本图形_第2张图片

 

 

扇形 http://baizihan.me/2016/10/draw-sector/

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

Shader "IBShaders/IBSectorShader"
{
    Properties
    { 
        _MainTex("Main Texture", 2D) = "white" {}
        _Color ("Color", Color) = (0.17,0.36,0.81,0.0)
        _Angle ("Angle", Range(0, 360)) = 60
        _Gradient ("Gradient", Range(0, 1)) = 0
    }

    SubShader
    {
       Tags { "Queue"="Transparent" "RenderType"="Transparent" "IgnoreProjector"="True" }
         Pass
        {
            ZWrite Off
            Blend SrcAlpha OneMinusSrcAlpha
            CGPROGRAM
 
            #pragma vertex vert
            #pragma fragment frag
            #include "UnityCG.cginc"

            sampler2D _MainTex;
            float4 _Color;
            float _Angle;
            float _Gradient;
 
            struct fragmentInput
           {
                float4 pos : SV_POSITION;
                float2 uv : TEXTCOORD0;
            };

            fragmentInput vert (appdata_base v)
            {
                fragmentInput o;

                o.pos = UnityObjectToClipPos (v.vertex);
                o.uv = v.texcoord.xy;

                return o;
            }
 
            fixed4 frag(fragmentInput i) : SV_Target
           {
                // 离中心点的距离
                float distance = sqrt(pow(i.uv.x - 0.5, 2) + pow(i.uv.y - 0.5, 2));
                // 在圆外
                if(distance > 0.5)
              {
                    discard;
                }
                // 根据距离计算透明度渐变
                float grediant = (1 - distance - 0.5 * _Gradient) / 0.5;
                // 正常显示的结果
                fixed4 result = tex2D(_MainTex, i.uv) * _Color * fixed4(1,1,1, grediant);
                float x = i.uv.x;
                float y = i.uv.y;
                float deg2rad = 0.017453;   // 角度转弧度
                // 根据角度剔除掉不需要显示的部分
                // 大于180
                if(_Angle > 180)
              {
                    if(y > 0.5 && abs(0.5 - y) >= abs(0.5 - x) / tan((180 - _Angle / 2) * deg2rad))
                        discard;// 剔除
                }
                else    // 180度以内
                {
                    if(y > 0.5 || abs(0.5 -y) < abs(0.5 - x) / tan(_Angle / 2 * deg2rad))
                        discard;
                }
                return result;
            }

            ENDCG
        }
    } 
    FallBack "Diffuse"
}

 

shader 绘制基本图形_第3张图片

 

 

三角形

Shader "IBShaders/IBGradientShader"
{
    Properties
    {
       _MainColor("Main Color",COLOR) = (1,1,1,1)
       _PosY("Pos Y",Range(0,1))= 0.5
       _SinScale("Sin(uv.x * 3.14) * _SinScale",Range(0,1)) = 0.5
       _ClipX("Clip X",Range(0,0.5)) = 0.1
       _ClipY("Clip Y",Range(0,1)) = 0.1
       _Gradient("Gradient",Range(0,10)) = 4
       _LerpValue("Lerp Value (X Min Alpha,Y Max Alpha, Z Min X Pos,W Max Y Pos)",Vector) = (0, 1, 0, 0)
    }

    SubShader
    {
        Tags { "RenderType"="Transparent" "Queue" = "Transparent" "IgnoreProjector" = "true" "PreviewType" = "Plane"}
       Blend SrcAlpha One

        //LOD 100

        Pass
        {
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            #include "UnityCG.cginc"

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

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

           float4 _MainColor;
           fixed _PosY;
           fixed _SinScale;

           fixed _ClipX;
           fixed _ClipY;

           float _Gradient;

           float4 _LerpValue;
          

           float CalculationSin(float x)
           {
               fixed step = 1 / ( 1 - _ClipX * 2);//计算可视区域的X轴步长
              return sin((x - _ClipX) * step * 3.1415926) * _SinScale;
           }

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

            fixed4 frag (v2f i) : SV_Target
            {
              ///x: 0 - 1
              ///offsetx: {0.1, 0.2,   0.3,   0.4,   0.5
              ///        0.5,  0.4,   0.3,   0.2,   0.1}
              fixed offsetx = 0.5 - abs(i.uv.x - 0.5);
              clip(offsetx - _ClipX);
              clip(i.uv.y - _ClipY);

                fixed4 col = _MainColor;

              fixed sinPosY = CalculationSin( i.uv.x);

              if(i.uv.y >  _PosY + sinPosY )
              {
                  if(i.uv.y < sinPosY + offsetx * _Gradient)
                  {
                     col.alerp(_LerpValue.x,_LerpValue.y, 1 - i.uv.y);
                  }
              }
                return col;
            }
            ENDCG
        }
    }
}

shader 绘制基本图形_第4张图片

 

 

梯形

Shader "IBShaders/IBGradientShaderCopy"
{
    Properties
    {
       _MainColor("Main Color",COLOR) = (1,1,1,1)
       _PosY("Pos Y",Range(0,1))= 0.5
       _SinScale("Sin(uv.x * 3.14) * _SinScale",Range(0,1)) = 0.5
       _ClipX("Clip X",Range(0,0.5)) = 0.1
       _ClipY("Clip Y",Range(0,1)) = 0.1
       _Gradient("Gradient",Range(0,10)) = 4
       _LerpValue("Lerp Value (X Min Alpha,Y Max Alpha, Z Min X Pos,W Max Y Pos)",Vector) = (0, 1, 0, 0)
    }

    SubShader
    {
        Tags { "RenderType"="Transparent" "Queue" = "Transparent" "IgnoreProjector" = "true" "PreviewType" = "Plane"}
       Blend SrcAlpha One

        //LOD 100

        Pass
        {
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            #include "UnityCG.cginc"

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

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

           float4 _MainColor;
           fixed _PosY;
           fixed _SinScale;

           fixed _ClipX;
           fixed _ClipY;

           float _Gradient;

           float4 _LerpValue;
          

           float CalculationSin(float x)
           {
               fixed step = 1 / ( 1 - _ClipX * 2);//计算可视区域的X轴步长
              return sin((x - _ClipX) * step * 3.1415926) * _SinScale;
           }

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

            fixed4 frag (v2f i) : SV_Target
            {
              ///x: 0 - 1
              ///offsetx: {0.1, 0.2,   0.3,   0.4,   0.5
              ///        0.5,  0.4,   0.3,   0.2,   0.1}
              fixed offsetx = 0.5 - abs(i.uv.x - 0.5);
              clip(offsetx - _ClipX);
              clip(i.uv.y - _ClipY);

                fixed4 col = _MainColor;

              fixed sinPosY = CalculationSin( i.uv.x);

              if(i.uv.y >  _PosY + sinPosY )
              {
                  if(i.uv.y < sinPosY + offsetx * _Gradient)
                  {
                     col.alerp(_LerpValue.x,_LerpValue.y, 1 - i.uv.y);
                  }
              }
                return col;
            }
            ENDCG
        }
    }
}

shader 绘制基本图形_第5张图片

 

 

标尺

Shader "IBShaders/IBScaleplate"
{
    Properties
    {
       _MainColor("Main Color",COLOR) = (1,1,1,1)
       _PosY("Pos Y",Range(0,1))= 0.5
       _LineWidth("Line Width",Range(0,0.1)) = 0.001
       _StepCount("Step Count",float) = 10
       _StepWidth("Step Width",Range(0,1)) = 0.1
       _StepHeight("Step Height",Range(0,0.05)) = 0.1
       _OffsetX("Offset X",Range(0,1)) = 0
    }

    SubShader
    {
        Tags { "RenderType"="Transparent" "Queue" = "Transparent" "IgnoreProjector" = "true" "PreviewType" = "Plane"}
       Blend SrcAlpha One

        //LOD 100

        Pass
        {
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            #include "UnityCG.cginc"

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

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

           float4 _MainColor;
           fixed _PosY;
           fixed _LineWidth;

           float _StepCount;
           fixed _StepWidth;
           fixed _StepHeight;
           float _OffsetX;

           fixed GetStepX(fixed x)
           {
              fixed step = 1.0 / _StepCount;

              return x * _StepCount * step;
           }

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

            fixed4 frag (v2f i) : SV_Target
            {
                fixed4 col = _MainColor;

              fixed alpha = step(abs(i.uv.x - 0.5),_LineWidth);
              //绘制中间竖线
              if(abs(i.uv.x - 0.5) < _LineWidth)
              {
                  col.a = 1;
              }

              //绘制横线
              if(abs(i.uv.y - _PosY) < _LineWidth)
              {
                  col.a = 1;
              }

              //刻度偏移
              i.uv.x += _OffsetX;
              fixed stepLength = 1.0 / _StepCount;

              half posX = i.uv.x  * _StepCount;
              fixed x = frac(posX);//取小数部分
              fixed y = abs(i.uv.y - _PosY);

              if(x < _StepWidth && y < _StepHeight)
              {
                  col.a = 1;
              }

              half stepX = i.uv.x  * _StepCount * 0.1;
              x = frac(stepX);
             
              if(x < _StepWidth * 0.1 && y < _StepHeight * 2)
              {
                  col.a = 1;
              }

                return col;
            }
            ENDCG
        }
    }
}

shader 绘制基本图形_第6张图片

 

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