Objectives
- Implement a 2.5D depth sorting system for game objects and heroes
- Separate visual, logical, and interaction footprints for precise object behavior
- Create a three-pass rendering pipeline to handle shadows and depth
- Develop a passability matrix to manage collisions and pathfinding logic
- Build a toggleable debugging grid to visualize physical object boundaries
- Enable interactive object triggers using specific entry tiles
Instructions
- Create an
ObjectLibrary to store blueprints for images, offsets, and footprints.
- Define a specific “Anchor Point” (Pivot) for the hero and every object.
- Separate shadow assets from main object sprites to avoid rendering errors.
- Implement a three-pass rendering loop, starting with the ground terrain.
- Draw all shadows in the second pass relative to the object’s anchor point.
- Compile a
renderList containing the hero and all active map objects.
- Sort the
renderList based on the Y-coordinate of each entity’s anchor point.
- Draw entities in the sorted order to maintain the 3D depth illusion.
- Generate a 2D Passability Matrix that mirrors the map’s grid dimensions.
- Update the matrix by marking tiles within an object’s “Logical Footprint” as non-walkable.
- Create a toggleable debug mode to draw red squares over blocked tiles.
- Upgrade the pathfinding algorithm (like A*) to navigate around blocked matrix tiles.
- Define “Interaction Tiles” where the hero can trigger specific object events.
- Program the hero to automatically target an object’s interaction tile when clicked.
- Use relative offsets for all footprints so they move in sync with the object.