kepler.gl/src/deckgl-layers/dist/raster/raster-mesh-layer/raster-mesh-layer-shaders.js

kepler.gl is a webgl based application to visualize large scale location data in the browser

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.buildRasterMeshFragmentShader = buildRasterMeshFragmentShader;
exports.buildRasterMeshVertexShader = buildRasterMeshVertexShader;
exports.rasterMeshUniforms = void 0;
// SPDX-License-Identifier: MIT
// Copyright contributors to the kepler.gl project

var rasterMeshUniformBlock = "uniform rasterMeshUniforms {\n  float meshOpacity;\n  float meshFlatShading;\n} rasterMesh;\n";
var rasterMeshUniforms = exports.rasterMeshUniforms = {
  name: 'rasterMesh',
  vs: rasterMeshUniformBlock,
  fs: rasterMeshUniformBlock,
  uniformTypes: {
    meshOpacity: 'f32',
    meshFlatShading: 'f32'
  }
};

/**
 * Build the vertex shader for the raster mesh layer.
 */
function buildRasterMeshVertexShader() {
  return "#version 300 es\n#define SHADER_NAME raster-mesh-layer-vs\n\nin vec3 positions;\nin vec3 positions64Low;\nin vec3 normals;\nin vec3 colors;\nin vec2 texCoords;\n\nout vec2 vTexCoord;\nout vec3 cameraPosition;\nout vec3 normals_commonspace;\nout vec4 position_commonspace;\nout vec4 vColor;\n\nconst vec3 pickingColor = vec3(1.0, 0.0, 0.0);\nconst vec3 defaultNormal = vec3(0.0, 0.0, 1.0);\n\nvoid main(void) {\n  geometry.worldPosition = positions;\n  geometry.uv = texCoords;\n  geometry.pickingColor = pickingColor;\n\n  normals_commonspace = project_normal(normals);\n  geometry.normal = normals_commonspace;\n\n  gl_Position = project_position_to_clipspace(positions, positions64Low, vec3(0.0), geometry.position);\n  position_commonspace = geometry.position;\n  DECKGL_FILTER_GL_POSITION(gl_Position, geometry);\n\n  vTexCoord = texCoords;\n  cameraPosition = project.cameraPosition;\n\n  vColor = vec4(colors, 1.0);\n  DECKGL_FILTER_COLOR(vColor, geometry);\n}\n";
}

/**
 * Build the fragment shader for the raster mesh layer.
 * Uses DECKGL_CREATE_COLOR and DECKGL_MUTATE_COLOR hooks registered with
 * the ShaderAssembler. Module inject code is assembled by luma.gl.
 */
function buildRasterMeshFragmentShader() {
  return "#version 300 es\n#define SHADER_NAME raster-mesh-layer-fs\n\nprecision highp float;\nprecision mediump int;\nprecision mediump usampler2D;\n\nin vec2 vTexCoord;\nin vec3 cameraPosition;\nin vec3 normals_commonspace;\nin vec4 position_commonspace;\nin vec4 vColor;\n\nout vec4 fragColor;\n\nvoid main(void) {\n  geometry.uv = vTexCoord;\n  vec2 coord = vTexCoord;\n  vec4 image;\n\n  DECKGL_CREATE_COLOR(image, coord);\n\n  DECKGL_MUTATE_COLOR(image, coord);\n\n  vec3 normal;\n  if (rasterMesh.meshFlatShading > 0.5) {\n    normal = normalize(cross(dFdx(position_commonspace.xyz), dFdy(position_commonspace.xyz)));\n  } else {\n    normal = normals_commonspace;\n  }\n\n  vec3 lightColor = lighting_getLightColor(image.rgb, cameraPosition, position_commonspace.xyz, normal);\n  fragColor = vec4(lightColor, rasterMesh.meshOpacity);\n\n  DECKGL_FILTER_COLOR(fragColor, geometry);\n}\n";
}
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