@arcgis/core/chunks/EdgeShader.glsl.js

ArcGIS Maps SDK for JavaScript: A complete 2D and 3D mapping and data visualization API

/* COPYRIGHT Esri - https://js.arcgis.com/5.0.8/LICENSE.txt */
import{set as e}from"../core/libs/gl-matrix-2/math/vec2.js";import{create as i}from"../core/libs/gl-matrix-2/factories/vec2f64.js";import{SliceDraw as o}from"../views/3d/webgl-engine/core/shaderLibrary/Slice.glsl.js";import{terrainDepthTest as n}from"../views/3d/webgl-engine/core/shaderLibrary/shading/TerrainDepthTest.glsl.js";import{Float2BindUniform as s}from"../views/3d/webgl-engine/core/shaderModules/Float2BindUniform.js";import{Float4BindUniform as t}from"../views/3d/webgl-engine/core/shaderModules/Float4BindUniform.js";import{FloatBindUniform as d}from"../views/3d/webgl-engine/core/shaderModules/FloatBindUniform.js";import{glsl as l,If as a}from"../views/3d/webgl-engine/core/shaderModules/glsl.js";import{AdjustProjectedPosition as r}from"../views/3d/webgl-engine/shaders/sources/edgeRenderer/AdjustProjectedPosition.glsl.js";import{DiscardNonSilhouetteEdges as c}from"../views/3d/webgl-engine/shaders/sources/edgeRenderer/DiscardNonSilhouetteEdges.glsl.js";import{DistanceFalloff as p}from"../views/3d/webgl-engine/shaders/sources/edgeRenderer/DistanceFalloff.glsl.js";import{EdgeUtil as P}from"../views/3d/webgl-engine/shaders/sources/edgeRenderer/EdgeUtil.glsl.js";import{LineAmplitude as u}from"../views/3d/webgl-engine/shaders/sources/edgeRenderer/LineAmplitude.glsl.js";import{LineOffset as f}from"../views/3d/webgl-engine/shaders/sources/edgeRenderer/LineOffset.glsl.js";import{UnpackAttributes as g}from"../views/3d/webgl-engine/shaders/sources/edgeRenderer/UnpackAttributes.glsl.js";import{ShaderBuilder as v}from"../views/webgl/ShaderBuilder.js";import{Uniform as m}from"../views/webgl/Uniform.js";function x(i){const m=new v,{vertex:x,fragment:L,varyings:A,attributes:b}=m;i.legacy&&x.uniforms.add(new h("model"),new h("localView")),m.include(r,i),m.include(P,i),m.include(u,i),m.include(g,i),m.include(f,i),L.include(o,i),m.include(c,i),m.include(n,i),m.include(p,i),A.add("vColor","vec4"),A.add("vRadius","float"),A.add("vPosition","vec3",{invariant:!0}),A.add("vWorldPosition","vec3",{invariant:!0}),A.add("vLineLengthPixels","float"),A.add("vSizeFalloffFactor","float"),x.uniforms.add(new s("pixelToNDC",({camera:i})=>e(w,2/i.fullViewport[2],2/i.fullViewport[3])),new t("viewport",e=>e.camera.fullViewport),new d("pixelRatio",e=>e.camera.pixelRatio)),b.add("position0","vec3"),b.add("position1","vec3"),b.add("variantOffset","float"),b.add("variantStroke","float"),b.add("variantExtension","float");const j=1===i.type,V=2===i.type,C=1/255,S=1;return x.code.add(l`
    void calculateGeometricOutputs(vec3 viewPosV0, vec3 viewPosV1, vec3 worldPosV0, vec3 worldPosV1, vec3 worldNormal, UnpackedAttributes unpackedAttributes) {
      vec2 sideness = unpackedAttributes.sideness;
      vec2 sidenessNorm = unpackedAttributes.sidenessNorm;

      vWorldPosition = mix(worldPosV0, worldPosV1, sidenessNorm.y).xyz;

      vec3 viewPos = mix(viewPosV0, viewPosV1, sidenessNorm.y);
      forwardViewPosDepth(viewPos);

      vec4 projPosV0 = projFromViewPosition(viewPosV0);
      vec4 projPosV1 = projFromViewPosition(viewPosV1);
      vec4 projPos = projFromViewPosition(viewPos);

      vec3 screenSpaceLineNDC = (projPosV1.xyz / projPosV1.w - projPosV0.xyz / projPosV0.w);
      vec2 ndcToPixel = viewport.zw * 0.5;
      vec2 screenSpaceLinePixels = screenSpaceLineNDC.xy * ndcToPixel;
      float lineLengthPixels = length(screenSpaceLinePixels);

      float dzPerPixel = screenSpaceLineNDC.z / lineLengthPixels;
      vec2 screenSpaceDirection = screenSpaceLinePixels / lineLengthPixels;
      vec2 perpendicularScreenSpaceDirection = vec2(screenSpaceDirection.y, -screenSpaceDirection.x) * sideness.x;

      float falloffFactor = distanceBasedPerspectiveFactor(-viewPos.z) * pixelRatio;
      float lineWidthPixels = unpackedAttributes.lineWidthPixels * falloffFactor;

      float extensionLengthPixels = calculateExtensionLength(unpackedAttributes.extensionLengthPixels, lineLengthPixels) * falloffFactor;
      float lineAmplitudePixels = calculateLineAmplitude(unpackedAttributes) * pixelRatio;

      vSizeFalloffFactor = falloffFactor;

      float lineWidthAndAmplitudePixels = lineWidthPixels + lineAmplitudePixels + lineAmplitudePixels;
      float extendedLineLengthPixels = lineLengthPixels + extensionLengthPixels + extensionLengthPixels;

      // Line size with padding
      float halfAAPaddedLineWidthAndAmplitudePixels = lineWidthAndAmplitudePixels * 0.5 + ${l.float(S)};
      float aaPaddedRoundedCapSizePixels = lineWidthPixels * 0.5 + ${l.float(S)};

      // Half line width in NDC including padding for anti aliasing
      vec2 halfAAPaddedLineWidthAndAmplitudeNDC = halfAAPaddedLineWidthAndAmplitudePixels * pixelToNDC;
      vec2 aaPaddedRoundedCapSizeNDC = aaPaddedRoundedCapSizePixels * pixelToNDC;
      vec2 extensionLengthNDC = extensionLengthPixels * pixelToNDC;

      // Compute screen space position of vertex, offsetting for line size and end caps
      vec2 ndcOffset = (
          screenSpaceDirection * sideness.y * (aaPaddedRoundedCapSizeNDC + extensionLengthNDC)
        + perpendicularScreenSpaceDirection * halfAAPaddedLineWidthAndAmplitudeNDC
      );

      projPos.xy += ndcOffset * projPos.w;
      projPos.z += (dzPerPixel * (aaPaddedRoundedCapSizePixels + extensionLengthPixels)) * sideness.y * projPos.w;

      projPos = adjustProjectedPosition(projPos, worldNormal, 1.0 + max((lineWidthAndAmplitudePixels - 1.0) * 0.5, 0.0));

      // Line length with end caps
      float aaPaddedLineWithCapsLengthPixels = extendedLineLengthPixels + aaPaddedRoundedCapSizePixels + aaPaddedRoundedCapSizePixels;

      float pixelPositionAlongLine = aaPaddedLineWithCapsLengthPixels * sidenessNorm.y - aaPaddedRoundedCapSizePixels;

      // Position in pixels with origin at first vertex of line segment
      vPosition = vec3(
        halfAAPaddedLineWidthAndAmplitudePixels * sideness.x,
        pixelPositionAlongLine,
        pixelPositionAlongLine / extendedLineLengthPixels
      );

      // The line width radius in pixels
      vRadius = lineWidthPixels * 0.5;
      vLineLengthPixels = extendedLineLengthPixels;

      // discard short edges below a certain length threshold
      ${a(j||V,l`if (lineLengthPixels <= 3.0 ${a(V," && unpackedAttributes.type <= 0.0")}) {
                gl_Position = vec4(10.0, 10.0, 10.0, 1.0);
                return;
             }`)}
      gl_Position = projPos;
    }`),x.main.add(l`
    ComponentData component = readComponentData();
    UnpackedAttributes unpackedAttributes = unpackAttributes(component);

    vec3 worldPosV0, worldPosV1, viewPosV0, viewPosV1;
    worldAndViewFromModelPosition(position0, component.verticalOffset, worldPosV0, viewPosV0);
    worldAndViewFromModelPosition(position1, component.verticalOffset, worldPosV1, viewPosV1);

    // Component color
    vColor = component.color;

    // Discard fully transparent edges
    if (vColor.a < ${l.float(C)}) {
      gl_Position = vec4(10.0, 10.0, 10.0, 1.0);
      return;
    }

    if (discardNonSilhouetteEdges(viewPosV0, worldPosV0, component)) {
      return;
    }

    // General geometric computation for all types of edges
    calculateGeometricOutputs(viewPosV0, viewPosV1, worldPosV0, worldPosV1, worldNormal(component), unpackedAttributes);

    // Specific computation for different edge styles
    calculateStyleOutputs(unpackedAttributes);`),L.code.add(l`float lineWithCapsDistance(float radius, vec2 position, float lineLength) {
float positionX = position.x - calculateLineOffset();
if (radius < 1.0) {
float coverageX = clamp(min(radius, positionX + 0.5) - max(-radius, positionX - 0.5), 0.0, 1.0);
float coverageY = clamp(min(lineLength, position.y + 0.5) - max(0.0, position.y - 0.5), 0.0, 1.0);
return 0.5 - min(coverageX, coverageY);
}
else {
float positionOnCap = position.y - clamp(position.y, 0.0, lineLength);
return length(vec2(positionX, positionOnCap)) - radius;
}
}`),L.main.add(l`discardByTerrainDepth();
float radius = vRadius * calculateLinePressure();
float distance = lineWithCapsDistance(radius, vPosition.xy, vLineLengthPixels);
float coverage = clamp(0.5 - distance, 0.0, 1.0);
discardBySlice(vWorldPosition);
fragColor = vec4(vColor.rgb, vColor.a * coverage);`),m}const w=i();class h extends m{constructor(e){super(e,"mat4")}}const L=Object.freeze(Object.defineProperty({__proto__:null,build:x},Symbol.toStringTag,{value:"Module"}));export{L as E,x as b};