[florian.kieninger]

Hello,

 

i want to know what’s the common way to smash an entity when something drops on it.

So the height becomes smaller and smaller.

 

I have tried some ways, but with no success.

For example changing the height of the entity and so on…

 

Thanks for tips,

Florian

[AlexFelgo Team]

Hi Florian,

here is a small example how to decrease the height of a “smashable” box everytime another box drops on it.

Box.qml

import QtQuick 1.1
import Box2D 1.0
import VPlay 1.0

EntityBase {
  id: entity
  entityType: "box"

  width: 32
  height: 32
  BoxCollider {
    id: boxCollider
    anchors.fill: parent
    // restitution is bounciness
    fixture.restitution: 0.8

    fixture.onBeginContact: {
      if(variationType != "smashable") return;
      var fixture = other;
      var body = fixture.parent;
      var component = body.parent;
      var collidedEntity = component.owningEntity;
      var collidedEntityType = collidedEntity.entityType;
      var collidedEntityVariationType = collidedEntity.variationType;
      if(collidedEntityType === "box" && entity.height > 5) {
        entity.height = entity.height-3;
      }
    }
  }

  Rectangle {
    id: sprite
    color: "blue"
    anchors.fill: parent
  }
}

 

main.qml

import VPlay 1.0
import QtQuick 1.1
import "entities"

GameWindow {
  id: window

  EntityManager {
    id: entityManager
  }

  Scene {
    id: scene
    PhysicsWorld {gravity.y: -10}

    Box {
      x: 100
    }

    Box {
      x: 100
      y: 300
      variationType: "smashable"
    }

    EntityBase {
      id: ground
      entityType: "ground"
      height: 5
      anchors.left: scene.left
      anchors.right: scene.right
      anchors.bottom: scene.bottom
      Rectangle {
        color: "red"
        anchors.fill: parent
      }
      BoxCollider {
        anchors.fill: parent
        bodyType: Body.Static
      }
    }
  }
}

Is this kind of what you are looking for?

Cheers,
Alex