如何在加工图上一一显示标记？

Question

我正在使用 Unfolding Maps 在 Google 地图上可视化一些位置数据。我有几个位置，我需要像一个人的行进路径一样一个一个地显示。我尝试使用延迟，程序被冻结了。你能建议我一个正确的方法来实现这个目标吗？谢谢

Answer 1

试试这个：

import de.fhpotsdam.unfolding.*;
import de.fhpotsdam.unfolding.geo.*;
import de.fhpotsdam.unfolding.utils.*;

UnfoldingMap map;
ArrayList<Location> locations = new ArrayList<Location>();
int locationIndex = -1;

void setup() {
  size(800, 600);
  map = new UnfoldingMap(this);
  // Test data. Load your actual data, instead:
  locations.add(new Location(53, 0));
  locations.add(new Location(12, 50));
}

void draw() {
  map.draw();

  // Simple animation: Every 60 frames show next location 
  if (frameCount % 60 == 0) {
    // Increase only if more data exists
    if (locationIndex < locations.size() - 1) {
      locationIndex++;
    }
  }

  // Show all currently visible locations (i.e. 0 - index)
  for (int i = 0; i <= locationIndex; i++) {
    Location location = locations.get(i);
    ScreenPosition pos = map.getScreenPosition(location);
    ellipse(pos.x, pos.y, 10, 10);
  }
}

如何在加工图上一一显示标记？

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