@deck.gl/layers/src/path-layer/path-layer-fragment.glsl.ts

deck.gl core layers

// deck.gl
// SPDX-License-Identifier: MIT
// Copyright (c) vis.gl contributors

export default `\
#version 300 es
#define SHADER_NAME path-layer-fragment-shader

precision highp float;

in vec4 vColor;
in vec2 vCornerOffset;
in float vMiterLength;
/*
 * vPathPosition represents the relative coordinates of the current fragment on the path segment.
 * vPathPosition.x - position along the width of the path, between [-1, 1]. 0 is the center line.
 * vPathPosition.y - position along the length of the path, between [0, L / width].
 */
in vec2 vPathPosition;
in float vPathLength;
in float vJointType;

out vec4 fragColor;

void main(void) {
  geometry.uv = vPathPosition;

  if (vPathPosition.y < 0.0 || vPathPosition.y > vPathLength) {
    // if joint is rounded, test distance from the corner
    if (vJointType > 0.5 && length(vCornerOffset) > 1.0) {
      discard;
    }
    // trim miter
    if (vJointType < 0.5 && vMiterLength > path.miterLimit + 1.0) {
      discard;
    }
  }
  fragColor = vColor;

  DECKGL_FILTER_COLOR(fragColor, geometry);
}
`;