61 lines
1.1 KiB
TypeScript
61 lines
1.1 KiB
TypeScript
import { copyVector, type Vector } from "#/engine/Vector.ts";
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export type Rect = {
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position: Vector;
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width: number;
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height: number;
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};
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export function createRect(
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position: Vector,
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width: number,
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height: number,
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): Rect {
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return {
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position,
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width,
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height,
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};
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}
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export function fromMinMax(min: Vector, max: Vector): Rect {
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return {
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position: copyVector(min),
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width: max.x - min.x,
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height: max.y - min.y,
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};
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}
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export function strokeRect(
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ctx: CanvasRenderingContext2D,
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rect: Rect,
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color: string = "#fff",
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alpha: number = 1.0,
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lineWidth: number = 1,
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): void {
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ctx.save();
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ctx.strokeStyle = color;
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ctx.globalAlpha = alpha;
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ctx.lineWidth = lineWidth;
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ctx.strokeRect(
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rect.position.x + 0.5,
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rect.position.y + 0.5,
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rect.width - 1,
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rect.height - 1,
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);
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ctx.restore();
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}
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export function fillRect(
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ctx: CanvasRenderingContext2D,
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rect: Rect,
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color: string = "#fff",
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alpha: number = 1.0,
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): void {
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ctx.save();
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ctx.fillStyle = color;
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ctx.globalAlpha = alpha;
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ctx.fillRect(rect.position.x, rect.position.y, rect.width, rect.height);
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ctx.restore();
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}
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