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Is there perfect collision in a 2D game?
But perfect collision in 2D games often involves pixel perfect collision, which generates an overhead.
What do you need to know about collision detection?
To detect collisions in a Gameobject we need a Collider 2D, with the right type according to our needs. To allow physics 2D to affect a Gameobject we need a RigidBody 2D. Keep in mind all the rules we discussed before configuring the game properly and you will avoid unwanted behaviors.
What do you need to know about unity collision detection 2d?
If the Gameobject sprite is a complex drawing, just an approximation of its shape will be necessary to work, because the Collider 2D is invisible and not distinguishable during the gameplay! So the sprite is the drawing, the collider is the shape, what does it mean?
Is it worth it to do pixel perfect collision detection?
Pixel perfect collisions are usually expensive, so doing a rough estimate at first with a bounding box or a more detailed collision figure (Like the one Anko suggested) may save you some precious time
Which is the most efficient pixel perfect collision test?
Probably the most basic collision test is the bounding box check. The bounding box check is both the easiest and the most efficient way we have to reduce overhead on pixel-perfect collision games! Before you check if two sprites are colliding you check if they are near enough to have any chance of collision.
Is there an app for 2D collision detection?
On the App Hub, there is a very old sample that walks you through 2D collision detection from simple bounding boxes to pixel-tested on rotated and scaled sprites. It has been fully updated to 4.0. The whole series is worth a read if you are new to the topic.
How to make black pixels into collision points?
Program it so the black pixels are collision points. Give the character a collision map too; When processing maps, use a algorithm that will turn big squares of black pixels into collision rectangles. Save this rectangle data in an array. You can the use the Rectangle intersects function to look for collisions.