Forums » Impact Engine » twopointfive z-axis movement

I noticed that there's code for z-axis movement in the plugin, but it doesn't move the player/viewport when "jumping"

added this in my player update function:

        if(ig.input.pressed('jump') && !this.jumping){
		console.log('jumped');
		this.vel.z = 200;
		this.jumping = true;
	}

just to see if it worked and the player doesn't move up or down. tried both + and - z velocity

am I missing something? also is there a way to make the game more than 1 tileheight high? or is it just a single ground level for now?

Mind baking your game and hosting it so we can see what you mean? Not sure what z-velocity is supposed to be to be honest, but seeing what you're talking about might make it clear quickly.

From the readme:

The most importantant thing for your entities is to subclass them from `tpf.Entity` rather than from `ig.Entity`. The `tpf.Entity` provides some capabilities to position and draw them in 3D space. Each entity has an additional `.z` property for `.pos` and `.vel` that determines its vertical position and speed in the world.

Did you subclass from tpf.Entity?

http://enginedev.movingknowledge.com/impact/
controls WASD or arrows to move (can only strafe, not rotate)
spacebar to jump.
-Note: the blue space above you when it first loads is where I removed the ceiling tiles

the 'jump height' output is displaying player.pos.z of the xyz coordinate space
in this plugin X is left to right and Y is foreward/back and Z is supposed to be up and down.

this is code right from tpf.Entity for floor collision:

// handle the z-axis collision with the floor
		this.pos.z += this.vel.z;
		if( this.pos.z < 0 ) {
			if( this.bounciness > 0 && Math.abs(this.vel.z) > this.minBounceVelocity ) {
				this.vel.z *= -this.bounciness;				
			}
			else {
				this.vel.z = 0;
			}
			this.pos.z = 0;
		}

so z spacing is supposedly happening.

Did you subclass from tpf.Entity?

yes.

to test the functionality, I essentially just took dominic's twopointfive demo and removed the blobs/weapons and altered the controls.

the tile size and player size were both 32 so I changed the player to 8 to try giving it "room" to jump but it doesn't appear to affect even the view height on load.

Quote from Skywalker
http://enginedev.movingknowledge.com/impact/
controls WASD or arrows to move (can only strafe, not rotate)
spacebar to jump.
-Note: the blue space above you when it first loads is where I removed the ceiling tiles

the 'jump height' output is displaying player.pos.z of the xyz coordinate space
in this plugin X is left to right and Y is foreward/back and Z is supposed to be up and down.

this is code right from tpf.Entity for floor collision:

// handle the z-axis collision with the floor
		this.pos.z += this.vel.z;
		if( this.pos.z < 0 ) {
			if( this.bounciness > 0 && Math.abs(this.vel.z) > this.minBounceVelocity ) {
				this.vel.z *= -this.bounciness;				
			}
			else {
				this.vel.z = 0;
			}
			this.pos.z = 0;
		}

so z spacing is supposedly happening.yes.

to test the functionality, I essentially just took dominic's twopointfive demo and removed the blobs/weapons and altered the controls.

the tile size and player size were both 32 so I changed the player to 8 to try giving it "room" to jump but it doesn't appear to affect even the view height on load.

Are you sure that you modified the correct values. As i can see there is only x and y players values. In addition to it, you have to check on the camera settings not on the player. This is not a real 3D, so the Z axis is just a matrix with the perspective...

Maybe the vpos of the player changed succesfully, but the player camera did not move.

Quote from davidg0
Maybe the vpos of the player changed succesfully, but the player camera did not move.

Exactly. The player actually doesn't esist...

The camera position in TwoPointFive is not directly bound to the player position. The Player's update method in the example game just happens to update the camera position as well.

See lib/game/entities/player.js, line 202... in the example game. ig.system.camera.setPosition() incorporates the bobOffset, but not the players z-position.

Try this (line 216):

ig.system.camera.setPosition( cx, cy, bobOffset + this.pos.z );