package com.ard.work.sdk.zlxd.utils;
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import com.ard.work.api.domian.PointFrame;
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import lombok.Data;
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import lombok.AllArgsConstructor;
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/**
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* 新相机 3D 定位坐标转换工具 (纯 Integer 版)
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*
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* <p>适用场景：
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* 1. 前端/后端/海康 SDK 全程使用 Integer。
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* 2. 忽略小数精度，直接基于整数差值判断业务意图。
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* </p>
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*/
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public class PTZ3DLocationConverter {
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// ================= 配置常量 =================
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private static final int TARGET_W = 1920;
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private static final int TARGET_H = 1080;
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private static final int SOURCE_SCALE = 255;
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// 中心点 (整数除法会自动向下取整，960, 540)
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private static final int CENTER_X = TARGET_W / 2;
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private static final int CENTER_Y = TARGET_H / 2;
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/**
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* 缩小判定阈值：xTop - xBottom > 2
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*/
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private static final int SHRINK_THRESHOLD = 2;
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/**
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* 输出模型：新相机协议参数
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*/
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@Data
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@AllArgsConstructor
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public static class LocationParam {
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private final int areaWidth;
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private final int areaHeight;
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private final int areaX;
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private final int areaY;
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}
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// ================= 核心转换逻辑 =================
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public static LocationParam convertPrecise(PointFrame frame) {
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if (frame == null) throw new IllegalArgumentException("Frame is null");
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int x1 = frame.getXTop();
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int y1 = frame.getYTop();
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int x2 = frame.getXBottom();
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int y2 = frame.getYBottom();
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// 1. 缩小判断
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if ((x1 - x2) > SHRINK_THRESHOLD) {
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return new LocationParam(0, 0, 0, 0);
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}
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// 2. 点击判断
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if (x1 == x2 && y1 == y2) {
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// 坐标转像素
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int pxX = x1 * TARGET_W / SOURCE_SCALE;
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int pxY = y1 * TARGET_H / SOURCE_SCALE;
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int offsetX = pxX - CENTER_X;
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int offsetY = -(pxY - CENTER_Y);
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return new LocationParam(TARGET_W, TARGET_H, offsetX, offsetY);
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}
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// 3. 框选 (放大)
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int centerX = (x1 + x2) / 2;
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int centerY = (y1 + y2) / 2;
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int pxCenterX = centerX * TARGET_W / SOURCE_SCALE;
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int pxCenterY = centerY * TARGET_H / SOURCE_SCALE;
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int w = Math.abs(x2 - x1) * TARGET_W / SOURCE_SCALE;
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int h = Math.abs(y2 - y1) * TARGET_H / SOURCE_SCALE;
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int offsetX = pxCenterX - CENTER_X;
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int offsetY = -(pxCenterY - CENTER_Y);
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return new LocationParam(w, h, offsetX, offsetY);
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}
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}
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