Archive commit

src/ts/common/positionUtils.ts

@@ -0,0 +1,70 @@
+import { tileWidth, tileHeight, tileElevation } from './constants';
+import { Point, Rect } from './interfaces';
+
+export function toScreenX(x: number) {
+	return Math.floor(x * tileWidth) | 0;
+}
+
+export function toScreenY(y: number) {
+	return Math.floor(y * tileHeight) | 0;
+}
+
+export function toScreenYWithZ(y: number, z: number) {
+	return Math.floor(y * tileHeight - z * tileElevation) | 0;
+}
+
+export function toWorldX(x: number) {
+	return x / tileWidth;
+}
+
+export function toWorldY(y: number) {
+	return y / tileHeight;
+}
+
+export function toWorldZ(z: number) {
+	return z / tileElevation;
+}
+
+export function pointToScreen({ x, y }: Point): Point {
+	return {
+		x: toScreenX(x),
+		y: toScreenY(y),
+	};
+}
+
+export function pointToWorld({ x, y }: Point): Point {
+	return {
+		x: toWorldX(x),
+		y: toWorldY(y),
+	};
+}
+
+export function rectToScreen({ x, y, w, h }: Rect): Rect {
+	return {
+		x: toScreenX(x),
+		y: toScreenY(y),
+		w: toScreenX(w),
+		h: toScreenY(h),
+	};
+}
+
+export function roundPositionX(x: number) {
+	return Math.floor(x * tileWidth) / tileWidth;
+}
+
+export function roundPositionY(y: number) {
+	return Math.floor(y * tileHeight) / tileHeight;
+}
+
+export function roundPositionXMidPixel(x: number) {
+	return (Math.floor(x * tileWidth) + 0.5) / tileWidth;
+}
+
+export function roundPositionYMidPixel(y: number) {
+	return (Math.floor(y * tileHeight) + 0.5) / tileHeight;
+}
+
+export function roundPosition(point: Point) {
+	point.x = roundPositionX(point.x);
+	point.y = roundPositionY(point.y);
+}