casc-cesium
Version:
Vue 3.x components for CesiumJS.
42 lines (40 loc) • 2.01 kB
JavaScript
let isExtended = false;
let createShadowReceiveFragmentShaderNative;
class ShadowMapShaderExtend {
static extend(viewer) {
if (isExtended) {
return;
}
const ShadowMapShader = Cesium["ShadowMapShader"];
createShadowReceiveFragmentShaderNative = ShadowMapShader.createShadowReceiveFragmentShader;
ShadowMapShader.createShadowReceiveFragmentShader = function(fs, shadowMap, castShadows, isTerrain, hasTerrainNormal) {
fs = createShadowReceiveFragmentShaderNative.bind(this)(fs, shadowMap, castShadows, isTerrain, hasTerrainNormal);
const isSpotLight = shadowMap._isSpotLight;
if (isSpotLight) {
fs.sources[0] = `
uniform vec4 shadowMap_viewshedVisibleColor;
uniform vec4 shadowMap_viewshedInvisibleColor;
${fs.sources[0]}
`;
fs.sources[fs.sources.length - 1] = fs.sources[fs.sources.length - 1].replace("gl_FragColor.rgb *= visibility;", `
float _depth = shadowPosition.z - shadowParameters.depthBias;
float _visibility = czm_shadowDepthCompare(shadowMap_texture, shadowPosition.xy, _depth);
gl_FragColor.rgb *= (_visibility < 0.999 ? shadowMap_viewshedInvisibleColor.rgb :shadowMap_viewshedVisibleColor.rgb);
`);
fs.sources[fs.sources.length - 1] = fs.sources[fs.sources.length - 1].replace("vec3 directionEC = normalize(positionEC.xyz - shadowMap_lightPositionEC.xyz);", "vec3 directionEC = normalize(positionEC.xyz - shadowMap_lightPositionEC.xyz);if (distance(positionEC.xyz, shadowMap_lightPositionEC.xyz) > shadowMap_lightPositionEC.w) { return; }");
}
return fs;
};
isExtended = true;
}
static revoke(viewer) {
if (!isExtended) {
return;
}
const ShadowMapShader = Cesium["ShadowMapShader"];
ShadowMapShader.createShadowReceiveFragmentShader = createShadowReceiveFragmentShaderNative;
isExtended = false;
}
}
export { ShadowMapShaderExtend as default };
//# sourceMappingURL=ShadowMapShaderExtend.mjs.map