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{"version":3,"file":"LineMaterial.cjs","sources":["../../src/lines/LineMaterial.js"],"sourcesContent":["/**\n * parameters = {\n * color: <hex>,\n * linewidth: <float>,\n * dashed: <boolean>,\n * dashScale: <float>,\n * dashSize: <float>,\n * dashOffset: <float>,\n * gapSize: <float>,\n * }\n */\n\nimport { ShaderMaterial, UniformsLib, UniformsUtils, Vector2 } from 'three'\nimport { version } from '../_polyfill/constants'\n\nclass LineMaterial extends ShaderMaterial {\n constructor(parameters) {\n super({\n type: 'LineMaterial',\n\n uniforms: UniformsUtils.clone(\n UniformsUtils.merge([\n UniformsLib.common,\n UniformsLib.fog,\n {\n worldUnits: { value: 1 },\n linewidth: { value: 1 },\n resolution: { value: new Vector2(1, 1) },\n dashOffset: { value: 0 },\n dashScale: { value: 1 },\n dashSize: { value: 1 },\n gapSize: { value: 1 }, // todo FIX - maybe change to totalSize\n },\n ]),\n ),\n\n vertexShader: /* glsl */ `\n\t\t\t\t#include <common>\n\t\t\t\t#include <fog_pars_vertex>\n\t\t\t\t#include <logdepthbuf_pars_vertex>\n\t\t\t\t#include <clipping_planes_pars_vertex>\n\n\t\t\t\tuniform float linewidth;\n\t\t\t\tuniform vec2 resolution;\n\n\t\t\t\tattribute vec3 instanceStart;\n\t\t\t\tattribute vec3 instanceEnd;\n\n\t\t\t\t#ifdef USE_COLOR\n\t\t\t\t\t#ifdef USE_LINE_COLOR_ALPHA\n\t\t\t\t\t\tvarying vec4 vLineColor;\n\t\t\t\t\t\tattribute vec4 instanceColorStart;\n\t\t\t\t\t\tattribute vec4 instanceColorEnd;\n\t\t\t\t\t#else\n\t\t\t\t\t\tvarying vec3 vLineColor;\n\t\t\t\t\t\tattribute vec3 instanceColorStart;\n\t\t\t\t\t\tattribute vec3 instanceColorEnd;\n\t\t\t\t\t#endif\n\t\t\t\t#endif\n\n\t\t\t\t#ifdef WORLD_UNITS\n\n\t\t\t\t\tvarying vec4 worldPos;\n\t\t\t\t\tvarying vec3 worldStart;\n\t\t\t\t\tvarying vec3 worldEnd;\n\n\t\t\t\t\t#ifdef USE_DASH\n\n\t\t\t\t\t\tvarying vec2 vUv;\n\n\t\t\t\t\t#endif\n\n\t\t\t\t#else\n\n\t\t\t\t\tvarying vec2 vUv;\n\n\t\t\t\t#endif\n\n\t\t\t\t#ifdef USE_DASH\n\n\t\t\t\t\tuniform float dashScale;\n\t\t\t\t\tattribute float instanceDistanceStart;\n\t\t\t\t\tattribute float instanceDistanceEnd;\n\t\t\t\t\tvarying float vLineDistance;\n\n\t\t\t\t#endif\n\n\t\t\t\tvoid trimSegment( const in vec4 start, inout vec4 end ) {\n\n\t\t\t\t\t// trim end segment so it terminates between the camera plane and the near plane\n\n\t\t\t\t\t// conservative estimate of the near plane\n\t\t\t\t\tfloat a = projectionMatrix[ 2 ][ 2 ]; // 3nd entry in 3th column\n\t\t\t\t\tfloat b = projectionMatrix[ 3 ][ 2 ]; // 3nd entry in 4th column\n\t\t\t\t\tfloat nearEstimate = - 0.5 * b / a;\n\n\t\t\t\t\tfloat alpha = ( nearEstimate - start.z ) / ( end.z - start.z );\n\n\t\t\t\t\tend.xyz = mix( start.xyz, end.xyz, alpha );\n\n\t\t\t\t}\n\n\t\t\t\tvoid main() {\n\n\t\t\t\t\t#ifdef USE_COLOR\n\n\t\t\t\t\t\tvLineColor = ( position.y < 0.5 ) ? instanceColorStart : instanceColorEnd;\n\n\t\t\t\t\t#endif\n\n\t\t\t\t\t#ifdef USE_DASH\n\n\t\t\t\t\t\tvLineDistance = ( position.y < 0.5 ) ? dashScale * instanceDistanceStart : dashScale * instanceDistanceEnd;\n\t\t\t\t\t\tvUv = uv;\n\n\t\t\t\t\t#endif\n\n\t\t\t\t\tfloat aspect = resolution.x / resolution.y;\n\n\t\t\t\t\t// camera space\n\t\t\t\t\tvec4 start = modelViewMatrix * vec4( instanceStart, 1.0 );\n\t\t\t\t\tvec4 end = modelViewMatrix * vec4( instanceEnd, 1.0 );\n\n\t\t\t\t\t#ifdef WORLD_UNITS\n\n\t\t\t\t\t\tworldStart = start.xyz;\n\t\t\t\t\t\tworldEnd = end.xyz;\n\n\t\t\t\t\t#else\n\n\t\t\t\t\t\tvUv = uv;\n\n\t\t\t\t\t#endif\n\n\t\t\t\t\t// special case for perspective projection, and segments that terminate either in, or behind, the camera plane\n\t\t\t\t\t// clearly the gpu firmware has a way of addressing this issue when projecting into ndc space\n\t\t\t\t\t// but we need to perform ndc-space calculations in the shader, so we must address this issue directly\n\t\t\t\t\t// perhaps there is a more elegant solution -- WestLangley\n\n\t\t\t\t\tbool perspective = ( projectionMatrix[ 2 ][ 3 ] == - 1.0 ); // 4th entry in
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