Add surface geometry

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

@@ -1,6 +1,9 @@
 package space.kscience.visionforge.examples
 
-import space.kscience.visionforge.solid.*
+import space.kscience.visionforge.solid.ambientLight
+import space.kscience.visionforge.solid.extruded
+import space.kscience.visionforge.solid.polygon
+import space.kscience.visionforge.solid.solid
 
 fun main() = makeVisionFile {
     vision("canvas") {
@@ -12,8 +15,6 @@ fun main() = makeVisionFile {
                 }
                 layer(-30)
                 layer(30)
-            }.apply {
-                edges(false)
             }
         }
     }

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

@@ -1,16 +1,19 @@
 package space.kscience.visionforge.examples
 
-//fun main() = makeVisionFile {
+import space.kscience.visionforge.solid.ambientLight
-//    vision("canvas") {
+import space.kscience.visionforge.solid.polygon
-//        solid {
+import space.kscience.visionforge.solid.solid
-//            ambientLight()
+import space.kscience.visionforge.solid.surface
-//            surface("surface") {
+
-//                shape{
+fun main() = makeVisionFile {
-//                    polygon(8, 100)
+    vision("canvas") {
-//                    layer(-30)
+        solid {
-//                    layer(30)
+            ambientLight()
-//                }
+            surface("surface") {
-//            }
+                layer(0, {polygon(8,10)}, {polygon(8,20)})
-//        }
+                layer(10, {polygon(8,10)}, {polygon(8,30)})
-//    }
+
-//}
+            }
+        }
+    }
+}

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

@@ -9,37 +9,8 @@ import space.kscience.kmath.geometry.component2
 import space.kscience.visionforge.MutableVisionContainer
 import space.kscience.visionforge.VisionBuilder
 import space.kscience.visionforge.setChild
-import kotlin.math.PI
-import kotlin.math.cos
-import kotlin.math.sin
 
 
-public typealias Shape2D = List<Float32Vector2D>
-
-@Serializable
-public class Shape2DBuilder(private val points: ArrayList<Float32Vector2D> = ArrayList()) {
-
-    public fun point(x: Number, y: Number) {
-        points.add(Float32Vector2D(x, y))
-    }
-
-    public fun build(): Shape2D = points
-}
-
-public fun Shape2DBuilder.polygon(vertices: Int, radius: Number) {
-    require(vertices > 2) { "Polygon must have more than 2 vertices" }
-    val angle = 2 * PI / vertices
-    for (i in 0 until vertices) {
-        point(radius.toDouble() * cos(angle * i), radius.toDouble() * sin(angle * i))
-    }
-}
-
-/**
- * A layer for extruded shape
- */
-@Serializable
-public data class Layer(var x: Float, var y: Float, var z: Float, var scale: Float)
-
 /**
  * An extruded shape with the same number of points on each layer.
  */
@@ -50,6 +21,12 @@ public class Extruded(
     public val layers: List<Layer>,
 ) : SolidBase<Extruded>(), GeometrySolid {
 
+    /**
+     * A layer for extruded shape
+     */
+    @Serializable
+    public data class Layer(var x: Float, var y: Float, var z: Float, var scale: Float)
+
     init {
         require(shape.size > 2) { "Extruded shape requires more than 2 points per layer" }
     }
@@ -72,6 +49,8 @@ public class Extruded(
         var lowerLayer = layers.first()
         var upperLayer: List<Float32Vector3D>
 
+        geometryBuilder.cap(layers.first().reversed())
+
         for (i in (1 until layers.size)) {
             upperLayer = layers[i]
             for (j in (0 until shape.size - 1)) {
@@ -93,7 +72,7 @@ public class Extruded(
             )
             lowerLayer = upperLayer
         }
-        geometryBuilder.cap(layers.first().reversed())
+
         geometryBuilder.cap(layers.last())
     }
 
@@ -102,10 +81,12 @@ public class Extruded(
         public var layers: MutableList<Layer> = ArrayList(),
         public val properties: MutableMeta = MutableMeta(),
     ) {
+        @VisionBuilder
         public fun shape(block: Shape2DBuilder.() -> Unit) {
             this.shape = Shape2DBuilder().apply(block).build()
         }
 
+        @VisionBuilder
         public fun layer(z: Number, x: Number = 0.0, y: Number = 0.0, scale: Number = 1.0) {
             layers.add(Layer(x.toFloat(), y.toFloat(), z.toFloat(), scale.toFloat()))
         }

visionforge-solid/src/commonMain/kotlin/space/kscience/visionforge/solid/Shape2D.kt

@@ -0,0 +1,26 @@
+package space.kscience.visionforge.solid
+
+import kotlinx.serialization.Serializable
+import kotlin.math.PI
+import kotlin.math.cos
+import kotlin.math.sin
+
+public typealias Shape2D = List<Float32Vector2D>
+
+@Serializable
+public class Shape2DBuilder(private val points: ArrayList<Float32Vector2D> = ArrayList()) {
+
+    public fun point(x: Number, y: Number) {
+        points.add(Float32Vector2D(x, y))
+    }
+
+    public fun build(): Shape2D = points
+}
+
+public fun Shape2DBuilder.polygon(vertices: Int, radius: Number) {
+    require(vertices > 2) { "Polygon must have more than 2 vertices" }
+    val angle = 2 * PI / vertices
+    for (i in 0 until vertices) {
+        point(radius.toDouble() * cos(angle * i), radius.toDouble() * sin(angle * i))
+    }
+}

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

@@ -41,6 +41,7 @@ public class Solids(meta: Meta) : VisionPlugin(meta), MutableVisionContainer<Sol
             subclass(ConeSurface.serializer())
             subclass(Convex.serializer())
             subclass(Extruded.serializer())
+            subclass(Surface.serializer())
             subclass(PolyLine.serializer())
             subclass(SolidLabel.serializer())
             subclass(Sphere.serializer())

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

@@ -2,9 +2,14 @@ package space.kscience.visionforge.solid
 
 import kotlinx.serialization.SerialName
 import kotlinx.serialization.Serializable
+import space.kscience.dataforge.meta.MutableMeta
+import space.kscience.dataforge.names.Name
 import space.kscience.kmath.geometry.component1
 import space.kscience.kmath.geometry.component2
 import space.kscience.kmath.structures.Float32
+import space.kscience.visionforge.MutableVisionContainer
+import space.kscience.visionforge.VisionBuilder
+import space.kscience.visionforge.setChild
 
 
 private inline fun <T> Iterable<T>.sumOf(selector: (T) -> Float32): Float32 {
@@ -130,7 +135,39 @@ public class Surface(
         }
     }
 
+    public class Builder(
+        public var layers: MutableList<Layer> = ArrayList(),
+        public val properties: MutableMeta = MutableMeta(),
+    ) {
+
+        public fun layer(
+            z: Number,
+            innerBuilder: (Shape2DBuilder.() -> Unit)? = null,
+            outerBuilder: Shape2DBuilder.() -> Unit,
+        ) {
+            layers.add(
+                Layer(
+                    z.toFloat(),
+                    outer = Shape2DBuilder().apply(outerBuilder).build(),
+                    inner = innerBuilder?.let { Shape2DBuilder().apply(innerBuilder).build() }
+                )
+            )
+        }
+
+        internal fun build(): Surface = Surface(layers).apply {
+            properties.setMeta(Name.EMPTY, this@Builder.properties)
+        }
+    }
+
+
     public companion object {
         public const val TYPE: String = "solid.surface"
     }
 }
+
+
+@VisionBuilder
+public fun MutableVisionContainer<Solid>.surface(
+    name: String? = null,
+    action: Surface.Builder.() -> Unit = {},
+): Surface = Surface.Builder().apply(action).build().also { setChild(name, it) }