Package eu.svjatoslav.sixth.e3d.renderer.raster

Class ShapeCollection

java.lang.Object
eu.svjatoslav.sixth.e3d.renderer.raster.ShapeCollection
public class ShapeCollection extends Object
Root container that holds all 3D shapes in a scene and orchestrates their rendering.

ShapeCollection is the top-level scene graph. You add shapes to it, and during each render frame it transforms all shapes from world space to screen space (relative to the camera), sorts them by depth, and paints them back-to-front.

Usage example:


 // Get the root shape collection from the view panel
 ShapeCollection scene = viewPanel.getRootShapeCollection();

 // Add shapes to the scene
 scene.addShape(new Line(
     new Point3D(0, 0, 100),
     new Point3D(100, 0, 100),
     Color.RED, 2.0
 ));

 scene.addShape(new WireframeCube(
     new Point3D(0, 0, 200), 50,
     new LineAppearance(5, Color.GREEN)
 ));

The addShape(eu.svjatoslav.sixth.e3d.renderer.raster.shapes.AbstractShape) method is synchronized, making it safe to add shapes from any thread while the rendering loop is active.

See Also:

  • Constructor Details

    • ShapeCollection

      public ShapeCollection()
      Creates a new empty shape collection.

  • Method Details

    • addShape

      public void addShape(AbstractShape shape)
      Adds a shape to this collection. This method is thread-safe.
      Parameters:
      shape - the shape to add to the scene

    • getShapes

      public Collection<AbstractShape> getShapes()
      Returns the list of all shapes currently in this collection.
      Returns:
      unmodifiable view would be safer, but currently returns the internal list

    • clear

      public void clear()
      Removes all shapes from this collection. This method is thread-safe.

    • transformShapes

      public void transformShapes(ViewPanel viewPanel, RenderingContext renderingContext)
      Transforms all shapes to screen space and queues them for rendering. This is phase 1 of the multi-threaded render pipeline.
      Parameters:
      viewPanel - the view panel providing the camera state
      renderingContext - the rendering context with frame metadata

    • sortShapes

      public void sortShapes()
      Sorts all queued shapes by Z-depth (back to front). This is phase 2 of the multi-threaded render pipeline.

    • paintShapes

      public void paintShapes(RenderingContext renderingContext)
      Paints all already-sorted shapes to the rendering context. This is phase 3 of the multi-threaded render pipeline. Can be called multiple times with different segment contexts.
      Parameters:
      renderingContext - the rendering context to paint into

    • getQueuedShapeCount

      public int getQueuedShapeCount()
      Returns the number of shapes queued for rendering.
      Returns:
      the shape count