Forums » Help » Slopes in ImpactJS (Stop Sliding)

It seems the slopes are setup somewhat odd with impact. The slopes have a weird affect when I run up them, like its a normal square tile that I am jumping up onto and I get pushed down by gravity until I hit the halfway point of the tile.

My question is, is there a way to make it so that I do not slide down tiles when standing on them when affected by gravity or acceleration on the y axis.

A good example would be a sloped area in something like super mario bros. 3.

This is what I came up with as a solution for my problem.

handleMovementTrace: function(res){
	
	var mx, my, trace;
	
	mx = this.vel.x * ig.system.tick;
	my = this.vel.y * ig.system.tick;
	
	mx = (this.flip) ? mx+10 : mx-10;

	trace = ig.game.collisionMap.trace(
		this.pos.x, this.pos.y, mx, my+10, this.size.x, this.size.y
	);
	
	
	if(ig.input.pressed('shoot')){
		console.log("Trace: ", trace);
		console.log("Res: ", res);
	}

	if(res.collision.slope){
		this.slopeData.slope = true;
		this.slopeData.x = res.collision.slope.x;
		this.slopeData.y = res.collision.slope.y;
	}else{
		this.slopeData.slope = false;
	}

	if(trace.collision.slope){
		//this.vel.y = 150;
		this.slopeData.x = trace.collision.slope.x;
		this.slopeData.y = trace.collision.slope.y;
		console.log('slope');
	}
	this.parent(res);
}

antiSlideSlope: function (slopeData){
	slopeData = slopeData || false;
	if(slopeData.slope){
		if(this.flip){
			if(slopeData.y < 0){
				if(!ig.input.state('right') && !ig.input.state('left')){
					this.vel.x = 1.05;
				}
				if(this.standing && !this.jump){
					this.vel.y = -4;
				}

				if(ig.input.state('left')){
					this.vel.y = 75;
					this.vel.x = this.vel.x/2;
				}
			}else if(slopeData.y > 0){
				if(!ig.input.state('right') && !ig.input.state('left')){
					this.vel.x = -1.05;
				}
				if(this.standing && !this.jump){
					this.vel.y = -4;
				}
			}
		}else{
			if(slopeData.y < 0){
				if(!ig.input.state('right') && !ig.input.state('left')){
					this.vel.x = 1.05;
				}
				if(this.standing && !this.jump){
					this.vel.y = -4;
				}
			}else if(slopeData.y > 0){
				if(!ig.input.state('right') && !ig.input.state('left')){
					this.vel.x = -1.05;
				}
				if(this.standing && !this.jump){
					this.vel.y = -4;
				}

				if(ig.input.state('right')){
					this.vel.y = 75;
					this.vel.x = this.vel.x/2;
				}
			}
		}
	}
}