demo/scheme/src/jvmMain/kotlin/Main.kt

@@ -3,11 +3,15 @@ import androidx.compose.desktop.ui.tooling.preview.Preview
 import androidx.compose.material.MaterialTheme
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.remember
+import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.window.Window
 import androidx.compose.ui.window.application
 import center.sciprog.maps.scheme.*
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.isActive
+import kotlinx.coroutines.launch
 
 @Composable
 @Preview
@@ -20,6 +24,7 @@ fun App() {
                 1f
             )
         }
+        val scope = rememberCoroutineScope()
 
 
         SchemeView(
@@ -33,9 +38,24 @@ fun App() {
         ) {
             background(painterResource("middle-earth.jpg"))
             circle(410.52737 to 868.7676, color = Color.Blue)
-            text(410.52737 to 868.7676,"Shire", color = Color.Blue)
+            text(410.52737 to 868.7676, "Shire", color = Color.Blue)
             circle(1132.0881 to 394.99127, color = Color.Red)
-            text(1132.0881 to 394.99127, "Ordruin",color = Color.Red)
+            text(1132.0881 to 394.99127, "Ordruin", color = Color.Red)
+
+            val hobbitId = circle(410.52737 to 868.7676)
+
+            scope.launch {
+                var t = 0.0
+                while (isActive) {
+                    val x = 410.52737 + t * (1132.0881 - 410.52737)
+                    val y = 868.7676 + t * (394.99127 - 868.7676)
+                    circle(x to y, color = Color.Green, id = hobbitId)
+                    delay(100)
+                    t += 0.005
+                    if (t >= 1.0) t = 0.0
+                }
+            }
+
         }
     }
 }