Collisions

Sprites have a touching(sprite) method, which can detect pixel perfect collisions. This method uses the following optimizations:

• Tight Axis-Aligned Bounding Boxes using trigonometric functions
• 1 per-sprite collision canvas
• The collision canvas is the minimum size needed (only the collision box)
• willReadFrequently flag on the collision canvas rendering context to minimize GPU-CPU data transfer

TScratch also has methods for mouse interactions! You can use the Engine.isHovering(sprite) method to check, if the user is hovering a specific sprite. By combining this with Engine.mouseDown, you can create click events. You can also make your own custom events using Engine.mouseX and Engine.mouseY.

Remember that touching(sprite) doesn’t work with pivots yet.