Cesium-Prequel/Source/Shaders/PointPrimitiveCollectionVS.js

//This file is automatically rebuilt by the Cesium build process.
export default "uniform float u_maxTotalPointSize;\n\
\n\
attribute vec4 positionHighAndSize;\n\
attribute vec4 positionLowAndOutline;\n\
attribute vec4 compressedAttribute0;                       // color, outlineColor, pick color\n\
attribute vec4 compressedAttribute1;                       // show, translucency by distance, some free space\n\
attribute vec4 scaleByDistance;                            // near, nearScale, far, farScale\n\
attribute vec3 distanceDisplayConditionAndDisableDepth;    // near, far, disableDepthTestDistance\n\
\n\
varying vec4 v_color;\n\
varying vec4 v_outlineColor;\n\
varying float v_innerPercent;\n\
varying float v_pixelDistance;\n\
varying vec4 v_pickColor;\n\
\n\
const float SHIFT_LEFT8 = 256.0;\n\
const float SHIFT_RIGHT8 = 1.0 / 256.0;\n\
\n\
void main()\n\
{\n\
    // Modifying this shader may also require modifications to PointPrimitive._computeScreenSpacePosition\n\
\n\
    // unpack attributes\n\
    vec3 positionHigh = positionHighAndSize.xyz;\n\
    vec3 positionLow = positionLowAndOutline.xyz;\n\
    float outlineWidthBothSides = 2.0 * positionLowAndOutline.w;\n\
    float totalSize = positionHighAndSize.w + outlineWidthBothSides;\n\
    float outlinePercent = outlineWidthBothSides / totalSize;\n\
    // Scale in response to browser-zoom.\n\
    totalSize *= czm_pixelRatio;\n\
    // Add padding for anti-aliasing on both sides.\n\
    totalSize += 3.0;\n\
\n\
    float temp = compressedAttribute1.x * SHIFT_RIGHT8;\n\
    float show = floor(temp);\n\
\n\
#ifdef EYE_DISTANCE_TRANSLUCENCY\n\
    vec4 translucencyByDistance;\n\
    translucencyByDistance.x = compressedAttribute1.z;\n\
    translucencyByDistance.z = compressedAttribute1.w;\n\
\n\
    translucencyByDistance.y = ((temp - floor(temp)) * SHIFT_LEFT8) / 255.0;\n\
\n\
    temp = compressedAttribute1.y * SHIFT_RIGHT8;\n\
    translucencyByDistance.w = ((temp - floor(temp)) * SHIFT_LEFT8) / 255.0;\n\
#endif\n\
\n\
    ///////////////////////////////////////////////////////////////////////////\n\
\n\
    vec4 color;\n\
    vec4 outlineColor;\n\
    vec4 pickColor;\n\
\n\
    // compressedAttribute0.z => pickColor.rgb\n\
\n\
    temp = compressedAttribute0.z * SHIFT_RIGHT8;\n\
    pickColor.b = (temp - floor(temp)) * SHIFT_LEFT8;\n\
    temp = floor(temp) * SHIFT_RIGHT8;\n\
    pickColor.g = (temp - floor(temp)) * SHIFT_LEFT8;\n\
    pickColor.r = floor(temp);\n\
\n\
    // compressedAttribute0.x => color.rgb\n\
\n\
    temp = compressedAttribute0.x * SHIFT_RIGHT8;\n\
    color.b = (temp - floor(temp)) * SHIFT_LEFT8;\n\
    temp = floor(temp) * SHIFT_RIGHT8;\n\
    color.g = (temp - floor(temp)) * SHIFT_LEFT8;\n\
    color.r = floor(temp);\n\
\n\
    // compressedAttribute0.y => outlineColor.rgb\n\
\n\
    temp = compressedAttribute0.y * SHIFT_RIGHT8;\n\
    outlineColor.b = (temp - floor(temp)) * SHIFT_LEFT8;\n\
    temp = floor(temp) * SHIFT_RIGHT8;\n\
    outlineColor.g = (temp - floor(temp)) * SHIFT_LEFT8;\n\
    outlineColor.r = floor(temp);\n\
\n\
    // compressedAttribute0.w => color.a, outlineColor.a, pickColor.a\n\
\n\
    temp = compressedAttribute0.w * SHIFT_RIGHT8;\n\
    pickColor.a = (temp - floor(temp)) * SHIFT_LEFT8;\n\
    pickColor = pickColor / 255.0;\n\
\n\
    temp = floor(temp) * SHIFT_RIGHT8;\n\
    outlineColor.a = (temp - floor(temp)) * SHIFT_LEFT8;\n\
    outlineColor /= 255.0;\n\
    color.a = floor(temp);\n\
    color /= 255.0;\n\
\n\
    ///////////////////////////////////////////////////////////////////////////\n\
\n\
    vec4 p = czm_translateRelativeToEye(positionHigh, positionLow);\n\
    vec4 positionEC = czm_modelViewRelativeToEye * p;\n\
\n\
    ///////////////////////////////////////////////////////////////////////////\n\
\n\
#if defined(EYE_DISTANCE_SCALING) || defined(EYE_DISTANCE_TRANSLUCENCY) || defined(DISTANCE_DISPLAY_CONDITION) || defined(DISABLE_DEPTH_DISTANCE)\n\
    float lengthSq;\n\
    if (czm_sceneMode == czm_sceneMode2D)\n\
    {\n\
        // 2D camera distance is a special case\n\
        // treat all billboards as flattened to the z=0.0 plane\n\
        lengthSq = czm_eyeHeight2D.y;\n\
    }\n\
    else\n\
    {\n\
        lengthSq = dot(positionEC.xyz, positionEC.xyz);\n\
    }\n\
#endif\n\
\n\
#ifdef EYE_DISTANCE_SCALING\n\
    totalSize *= czm_nearFarScalar(scaleByDistance, lengthSq);\n\
#endif\n\
    // Clamp to max point size.\n\
    totalSize = min(totalSize, u_maxTotalPointSize);\n\
    // If size is too small, push vertex behind near plane for clipping.\n\
    // Note that context.minimumAliasedPointSize \"will be at most 1.0\".\n\
    if (totalSize < 1.0)\n\
    {\n\
        positionEC.xyz = vec3(0.0);\n\
        totalSize = 1.0;\n\
    }\n\
\n\
    float translucency = 1.0;\n\
#ifdef EYE_DISTANCE_TRANSLUCENCY\n\
    translucency = czm_nearFarScalar(translucencyByDistance, lengthSq);\n\
    // push vertex behind near plane for clipping\n\
    if (translucency < 0.004)\n\
    {\n\
        positionEC.xyz = vec3(0.0);\n\
    }\n\
#endif\n\
\n\
#ifdef DISTANCE_DISPLAY_CONDITION\n\
    float nearSq = distanceDisplayConditionAndDisableDepth.x;\n\
    float farSq = distanceDisplayConditionAndDisableDepth.y;\n\
    if (lengthSq < nearSq || lengthSq > farSq) {\n\
        // push vertex behind camera to force it to be clipped\n\
        positionEC.xyz = vec3(0.0, 0.0, 1.0);\n\
    }\n\
#endif\n\
\n\
    gl_Position = czm_projection * positionEC;\n\
    czm_vertexLogDepth();\n\
\n\
#ifdef DISABLE_DEPTH_DISTANCE\n\
    float disableDepthTestDistance = distanceDisplayConditionAndDisableDepth.z;\n\
    if (disableDepthTestDistance == 0.0 && czm_minimumDisableDepthTestDistance != 0.0)\n\
    {\n\
        disableDepthTestDistance = czm_minimumDisableDepthTestDistance;\n\
    }\n\
\n\
    if (disableDepthTestDistance != 0.0)\n\
    {\n\
        // Don't try to \"multiply both sides\" by w.  Greater/less-than comparisons won't work for negative values of w.\n\
        float zclip = gl_Position.z / gl_Position.w;\n\
        bool clipped = (zclip < -1.0 || zclip > 1.0);\n\
        if (!clipped && (disableDepthTestDistance < 0.0 || (lengthSq > 0.0 && lengthSq < disableDepthTestDistance)))\n\
        {\n\
            // Position z on the near plane.\n\
            gl_Position.z = -gl_Position.w;\n\
#ifdef LOG_DEPTH\n\
            czm_vertexLogDepth(vec4(czm_currentFrustum.x));\n\
#endif\n\
        }\n\
    }\n\
#endif\n\
\n\
    v_color = color;\n\
    v_color.a *= translucency * show;\n\
    v_outlineColor = outlineColor;\n\
    v_outlineColor.a *= translucency * show;\n\
\n\
    v_innerPercent = 1.0 - outlinePercent;\n\
    v_pixelDistance = 2.0 / totalSize;\n\
    gl_PointSize = totalSize * show;\n\
    gl_Position *= show;\n\
\n\
    v_pickColor = pickColor;\n\
}\n\
";