Add circle drawing

window.ts

@@ -144,7 +144,7 @@ export const setPixelColorRaw = (x: number, y: number, color: number) => {
 }
 
 export const setPixelColor = (x: number, y: number, color: number) => {
-	return setPixelColorRaw(x - cameraPos.x, y - cameraPos.y, color);
+	return setPixelColorRaw(Math.floor(x - cameraPos.x), Math.floor(y - cameraPos.y), color);
 }
 
 export const setPixelsInRect = (x: number, y: number, w: number, pixels: Array<number>) => {
@@ -163,6 +163,37 @@ export const fillRect = (x: number, y: number, w: number, h: number, color: numb
 	setPixelsInRect(x, y, w, Array(w*h).fill(color));
 }
 
+export const fillCircle = (x: number, y: number, r: number, color: number) => {
+	const left = Math.floor(x-r-1);
+	const top = Math.floor(y-r-1);
+	for (let i = left; i <= Math.ceil(x+r+1); i ++) {
+		for (let j = top; j <= Math.ceil(y+r+1); j ++) {
+			if (Math.sqrt((x-i)**2 + (y-j)**2) <= r+0.5) {
+				setPixelColor(i, j, color);
+			}
+		}
+	}
+}
+
+export const outlineCircle = (x: number, y: number, r: number, color: number) => {
+	const left = Math.floor(x-r-1);
+	const top = Math.floor(y-r-1);
+	const inR = (d: number) => d <= r+0.5 && d > r-0.5;
+	for (let i = left; i <= Math.ceil(x+r+1); i ++) {
+		for (let j = top; j <= Math.ceil(y+r+1); j ++) {
+			const d = Math.sqrt((x-i)**2 + (y-j)**2);
+			if (inR(d)) {
+				const dh = Math.sqrt((x-(i+Math.sign(i-x)))**2 + (y-j)**2);
+				const dv = Math.sqrt((x-i)**2 + (y-(j+Math.sign(j-y)))**2);
+				const h = Math.abs(x-i) > Math.abs(y-j);
+				if (!inR(h ? dh : dv)) {
+					setPixelColor(i, j, color);
+				}
+			}
+		}
+	}
+}
+
 export const fillRectRaw = (x: number, y: number, w: number, h: number, color: number) => {
 	setPixelsInRectRaw(x, y, w, Array(w*h).fill(color));
 }