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CenterLocator.js
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CenterLocator.js
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/**
* @author syt123450 / https://github.com/syt123450
* @author zchholmes / https://github.com/zchholmes
*/
import { MathUtils } from "./MathUtils";
import { FeatureMapIntervalRatio } from "./Constant";
let CenterLocator = ( function() {
function createLineCenters( filters, width ) {
let centerList = [];
let fmLength = width;
let initXTranslate;
initXTranslate = - ( 1 + FeatureMapIntervalRatio ) * ( filters - 1 ) / 2 * fmLength;
for ( let i = 0; i < filters; i++ ) {
let xTranslate = initXTranslate + ( 1 + FeatureMapIntervalRatio ) * fmLength * i;
let centerPos = [];
centerPos.push( xTranslate );
centerPos.push( 0 );
centerList.push( centerPos );
}
return centerList;
}
function createRectangleCenters( filters, width, height ) {
let centerList = [];
// Get the best rectangle shape ([0]: width; [1]: height)
let rectShape = MathUtils.getClosestTwoFactors( filters );
let initXTranslate = - ( rectShape[0] - 1 ) / 2 * ( 1 + FeatureMapIntervalRatio ) * width;
let initZTranslate = - ( rectShape[1] - 1 ) / 2 * ( 1 + FeatureMapIntervalRatio ) * height;
for ( let i = 0; i < rectShape[ 0 ]; i ++ ) {
for ( let j = 0; j < rectShape[ 1 ]; j ++ ) {
let centerPos = [];
let xTranslate = initXTranslate + ( 1 + FeatureMapIntervalRatio ) * width * i; // width ==> i
let zTranslate = initZTranslate + ( 1 + FeatureMapIntervalRatio ) * height * j; // height==> j
centerPos.push( xTranslate );
centerPos.push( zTranslate );
centerList.push( centerPos );
}
}
return centerList;
}
return {
createLineCenters: createLineCenters,
createRectangleCenters: createRectangleCenters
}
} )();
export { CenterLocator };