Edit Operations

Less than 1 minute

Edit Operations

Basic entity editing operations, including move, copy, rotate, scale, mirror, erase, and more.

Online Examples

Example	Description	Link
Move Entity	`move` method example	Online Demo{target="_blank"}
Copy Entity	`clone` method example	Online Demo{target="_blank"}
Rotate Entity	`rotate` method example	Online Demo{target="_blank"}
Scale Entity	`scale` method example	Online Demo{target="_blank"}
Mirror Entity	`mirror` method example	Online Demo{target="_blank"}
Erase Entity	Usage of `Engine.eraseEntities`	Online Demo{target="_blank"}
Draw Order	Adjust draw order with `DrawOrder`	Online Demo{target="_blank"}
Group Operations	`GROUP` / `UNGROUP` examples	Online Demo{target="_blank"}
Highlight Entities	Usage of `highLightEntities` and `clearHighLight`	Online Demo{target="_blank"}

Core API

Move Entities

// Move entity
entity.move(dx, dy);  // Relative move
entity.move(new Point2D(dx, dy));  // Using Point2D

// Batch move
entities.forEach(e => e.move(100, 50));
Engine.regen();

Copy Entities

// Clone entity
const cloned = entity.clone();
cloned.move(100, 0);  // Move to new position
Engine.addEntities(cloned);

Rotate Entities

// Rotate around a point
const center = new Point2D(0, 0);
const angle = Math.PI / 4;  // 45 degrees in radians
entity.rotate(center, angle);
Engine.regen();

Scale Entities

// Scale around a point
const basePoint = new Point2D(0, 0);
const scaleFactor = 2.0;
entity.scale(basePoint, scaleFactor);
Engine.regen();

Mirror Entities

// Mirror along a line
const mirrorLine = {
    start: new Point2D(0, 0),
    end: new Point2D(0, 100)
};
entity.mirror(mirrorLine.start, mirrorLine.end);
Engine.regen();

Erase Entities

// Erase a single entity
Engine.eraseEntities(entity);

// Erase multiple entities
Engine.eraseEntities([entity1, entity2, entity3]);