Geometry.pde

class Geometry extends Entity {
	PVector[] vertices;
	color colorFill;
	PShape shape;

	Geometry(PVector[] vertices, color colorFill, boolean solid) {
		this.zIndex = 100;
		this.solid = solid;

		this.vertices = vertices;
		this.colorFill = colorFill;
		this.shape = createShape();

		this.shape.setFill(this.colorFill);
		this.shape.setStroke(false);
		this.shape.beginShape();
		for (PVector point : vertices) {
			this.shape.vertex(point.x, point.y);
		}
		this.shape.endShape(CLOSE);

		this.updateBoundingBox();
	}

	PVector getVertex(int index) {
		return this.vertices[index];
	}
	PVector[] getVertices() {
		return this.vertices;
	}

	PVector[] getLine(int index) {
		PVector start = this.vertices[index];
		PVector end = this.vertices[index < this.vertices.length - 1 ? index + 1 : 0];
		return new PVector[] { start, end };
	}

	PVector[][] getLines() {
		PVector[][] result = new PVector[this.vertices.length][2];
		for (int i = 0; i < this.vertices.length; i++) {
			result[i] = this.getLine(i);
		}
		return result;
	}

	void updateBoundingBox() {
		PVector mins = null, maxs = null;
		for (PVector vertex : this.vertices) {
			if (mins == null || maxs == null) {
				mins = vertex.copy();
				maxs = vertex.copy();
				continue;
			}

			mins.x = min(vertex.x, mins.x);
			mins.y = min(vertex.y, mins.y);
			maxs.x = max(vertex.x, maxs.x);
			maxs.y = max(vertex.y, maxs.y);
		}
		this.boundingBox = new PVector[]{ mins, maxs };
	}

	void OnDraw() {
		shape(this.shape);
	}
}