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- //This file is automatically rebuilt by the Cesium build process.
- export default "uniform sampler2D colorTexture;\n\
- uniform float gradations;\n\
- varying vec2 v_textureCoordinates;\n\
- void main(void)\n\
- {\n\
- vec3 rgb = texture2D(colorTexture, v_textureCoordinates).rgb;\n\
- #ifdef CZM_SELECTED_FEATURE\n\
- if (czm_selected()) {\n\
- gl_FragColor = vec4(rgb, 1.0);\n\
- return;\n\
- }\n\
- #endif\n\
- float luminance = czm_luminance(rgb);\n\
- float darkness = luminance * gradations;\n\
- darkness = (darkness - fract(darkness)) / gradations;\n\
- gl_FragColor = vec4(vec3(darkness), 1.0);\n\
- }\n\
- ";
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