Minor fixes

demo/playground/src/jvmMain/kotlin/allThingsDemo.kt

@@ -2,6 +2,7 @@ package space.kscience.visionforge.examples
 
 import kotlinx.html.h2
 import space.kscience.dataforge.meta.ValueType
+import space.kscience.dataforge.meta.invoke
 import space.kscience.plotly.layout
 import space.kscience.plotly.models.ScatterMode
 import space.kscience.plotly.models.TextPosition
@@ -12,13 +13,14 @@ import space.kscience.visionforge.markup.markdown
 import space.kscience.visionforge.plotly.plotly
 import space.kscience.visionforge.solid.box
 import space.kscience.visionforge.solid.solid
+import space.kscience.visionforge.solid.specifications.Canvas3DOptions
 import space.kscience.visionforge.solid.z
 import space.kscience.visionforge.tables.columnTable
-import java.nio.file.Paths
+import kotlin.io.path.Path
 
 
 fun main() = makeVisionFile(
-    Paths.get("VisionForgeDemo.html"),
+    Path("VisionForgeDemo.html"),
     resourceLocation = ResourceLocation.EMBED
 ) {
     markdown {
@@ -32,7 +34,14 @@ fun main() = makeVisionFile(
 
     h2 { +"3D visualization with Three-js" }
     vision("3D") {
-        solid {
+        solid(
+            Canvas3DOptions {
+                axes {
+                    size = 200.0
+                    visible = true
+                }
+            }
+        ) {
             box(100, 100, 100, name = "aBox") {
                 z = 50.0
             }

visionforge-core/src/commonMain/kotlin/space/kscience/visionforge/html/VisionTagConsumer.kt

@@ -26,7 +26,7 @@ public annotation class VisionDSL
  * A placeholder object to attach inline vision builders.
  */
 @VisionDSL
-public class VisionOutput @PublishedApi internal constructor(public val context: Context, public val name: Name) {
+public class VisionOutput @PublishedApi internal constructor(override val context: Context, public val name: Name): ContextAware {
     public var meta: Meta = Meta.EMPTY
 
     private val requirements: MutableSet<PluginFactory<*>> = HashSet()
@@ -95,9 +95,10 @@ public abstract class VisionTagConsumer<R>(
         if (!outputMeta.isEmpty()) {
             //Hard-code output configuration
             script {
+                type = "text/json"
                 attributes["class"] = OUTPUT_META_CLASS
                 unsafe {
-                    +manager.jsonFormat.encodeToString(MetaSerializer, outputMeta)
+                    +("\n" + manager.jsonFormat.encodeToString(MetaSerializer, outputMeta) + "\n")
                 }
             }
         }

visionforge-core/src/jsMain/kotlin/space/kscience/visionforge/VisionClient.kt

@@ -176,11 +176,13 @@ public class VisionClient : AbstractPlugin() {
         }
 
         val outputMeta = element.getEmbeddedData(VisionTagConsumer.OUTPUT_META_CLASS)?.let {
-            VisionManager.defaultJson.decodeFromString(MetaSerializer, it)
+            VisionManager.defaultJson.decodeFromString(MetaSerializer, it).also {
+                logger.info { "Output meta for $name: $it" }
+            }
         } ?: Meta.EMPTY
 
         when {
-            // fetch data if path is provided
+            // fetch data if the path is provided
             element.attributes[OUTPUT_FETCH_ATTRIBUTE] != null -> {
                 val attr = element.attributes[OUTPUT_FETCH_ATTRIBUTE]!!
 

visionforge-solid/src/commonMain/kotlin/space/kscience/visionforge/solid/Solids.kt

@@ -85,5 +85,9 @@ public inline fun VisionOutput.solid(options: Canvas3DOptions? = null, block: So
     options?.let {
         meta = options.meta
     }
-    return SolidGroup().apply(block)
+    return SolidGroup().apply(block).apply {
+        if (children.values.none { it is LightSource }) {
+            ambientLight()
+        }
+    }
 }

visionforge-threejs/src/main/kotlin/space/kscience/visionforge/solid/three/ThreePlugin.kt

@@ -124,7 +124,7 @@ public class ThreePlugin : AbstractPlugin(), ElementVisionRenderer {
 
     public fun getOrCreateCanvas(
         element: Element,
-        options: Canvas3DOptions = Canvas3DOptions(),
+        options: Canvas3DOptions,
     ): ThreeCanvas = canvasCache.getOrPut(element) {
         ThreeCanvas(this, element, options)
     }
@@ -142,7 +142,7 @@ public class ThreePlugin : AbstractPlugin(), ElementVisionRenderer {
     internal fun renderSolid(
         element: Element,
         vision: Solid,
-        options: Canvas3DOptions = Canvas3DOptions(),
+        options: Canvas3DOptions,
     ): ThreeCanvas = getOrCreateCanvas(element, options).apply {
         render(vision)
     }
@@ -166,7 +166,7 @@ public fun ThreePlugin.render(
     element: HTMLElement,
     obj: Solid,
     optionsBuilder: Canvas3DOptions.() -> Unit = {},
-): ThreeCanvas = renderSolid(element, obj).apply {
+): ThreeCanvas = renderSolid(element, obj, Canvas3DOptions(optionsBuilder)).apply {
     options.apply(optionsBuilder)
 }