CODEWITHSUNDEEP
javalibgdxbox2d
user1176999
user1176999

Reputation: 470

How can I make an object in box2dlights unaffected by light?

When i create an object in libgdx and Box2D it is automatically affected by light and it is casting shadows. Is there a way to make an object that does not cast shadows?

Upvotes: 1

Views: 999

Answers (1)

noone
noone

Reputation: 19776

Shadows happen when a Light ray collides with a Fixture. This collision handling is done via standard box2d queries and it uses the box2d Filter. See the code here.

You can set your filter bits via the following method found in Light:

/**
* create new contact filter for ALL LIGHTS with give parameters
*/
static public void setContactFilter(short categoryBits, short groupIndex,
            short maskBits) {
    filterA = new Filter();
    filterA.categoryBits = categoryBits;
    filterA.groupIndex = groupIndex;
    filterA.maskBits = maskBits;
}

To understand how this works, check out the Box2D manual chapter 6.2 (Filtering).

Upvotes: 2

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