@litecanvas/utils/dist/camera.min.js

Utilities to help build litecanvas games

(()=>{globalThis.utils=globalThis.utils||{};globalThis.utils.global=(o=!0)=>{for(let i in globalThis.utils)i!=="global"&&(o||globalThis[i]===void 0)&&(globalThis[i]=globalThis.utils[i])};var n=class{_engine=null;x=0;y=0;ox=0;oy=0;width=0;height=0;rotation=0;scale=1;_shake={x:0,y:0,removeListener:null};constructor(i=null,t=0,s=0,h=null,e=null){this._engine=i||globalThis,this.ox=t,this.oy=s,this.resize(h||this._engine.WIDTH-t,e||this._engine.HEIGHT-s),this.x=this.width/2,this.y=this.height/2}resize(i,t){this.width=i,this.height=t,this._engine.emit("camera-resized",this)}start(i=!1){if(this._engine.push(),i){let h=path();h.rect(this.ox,this.oy,this.width,this.height),this._engine.clip(h)}let t=this.ox+this.width/2,s=this.oy+this.height/2;this._engine.translate(t,s),this._engine.scale(this.scale),this._engine.rotate(this.rotation),this._engine.translate(-this.x+this._shake.x,-this.y+this._shake.y)}end(){this._engine.pop()}lookAt(i,t){this.x=i,this.y=t}move(i,t){this.x+=i,this.y+=t}zoom(i){this.scale*=i}zoomTo(i){this.scale=i}rotate(i){this.rotation+=i}rotateTo(i){this.rotation=i}getWorldPoint(i,t,s={}){let h=Math.cos(-this.rotation),e=Math.sin(-this.rotation);return i=(i-this.width/2-this.ox)/this.scale,t=(t-this.height/2-this.oy)/this.scale,s.x=h*i-e*t+this.x,s.y=e*i+h*t+this.y,s}getCameraPoint(i,t,s={}){let h=Math.cos(-this.rotation),e=Math.sin(-this.rotation);return i=i-this.x,t=t-this.y,i=h*i-e*t,t=e*i+h*t,s.x=i*this.scale+this.width/2+this.ox,s.y=t*this.scale+this.height/2+this.oy,s}getBounds(){return[this.ox,this.oy,this.width,this.height]}viewing(i,t,s,h){let e=this.width/2-this.x,a=this.height/2-this.y,l=this.width/this.scale,r=this.height/this.scale;return this._engine.colrect(i,t,s,h,e,a,l,r)}shake(i=1,t=.3){this.shaking||(this._shake.removeListener=this._engine.listen("update",s=>{this._shake.x=this._engine.randi(-i,i),this._shake.y=this._engine.randi(-i,i),t-=s,t<=0&&this.unshake()}))}unshake(){this.shaking&&(this._shake.removeListener(),this._shake.removeListener=null,this._shake.x=this._shake.y=0)}get shaking(){return this._shake.removeListener!==null}};globalThis.utils=Object.assign(globalThis.utils||{},{Camera:n});})();