Trying to Update vectorY via JavaScript

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paradine's avatar
paradine

  • Hey there,

    I am relatively new to construct. To practice I want to try to write the Flappy Bird template project fully in JavaScript.

    So first I created a Class Player: 

    class Player extends ISpriteInstance {
	constructor() {
		super();
	}
	
	jump() {
		this.behaviors.Platform.vectorY = - this.behaviors.Platform.jumpStrength;
		this.angleDegrees = 320;
	}
	
	tick() {
		
		this.angleDegrees += 60 * this.runtime.dt;
	}
}

    And a StartUp Script: 

    runOnStartup(async runtime => {
	runtime.objects.Player.setInstanceClass(Player);
	
	runtime.addEventListener("beforeprojectstart", () => {
		runtime.addEventListener("mousedown", (e) => {
			const Player = runtime.objects.Player.getFirstInstance();
			
			if(Player) {
				 Player.jump();
			}
		});
		
		runtime.addEventListener("tick", () => {
			const Player = runtime.objects.Player.getFirstInstance();

			if(Player) {
				Player.tick();
			}
		});
	});
});

    Everything works fine exept the jumping part. The bird is rotated but no jumping force (vectorY) is applyed. It seems that this is only a read only value. The documentation says, that you can also edit the value (https://www.construct.net/en/make-games/manuals/construct-3/scripting/scripting-reference/behavior-interfaces/platform). What am I doing wrong?!

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