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Are there any collision detection tests in XNA?
Finally, here it is!] XNA includes simple intersection tests for shapes like: Bounding Spheres, AABB (Axis Aligned Bound Box), Planes, Rays, Rectangles, Frustums, etc, and any combination of them. And what is even more useful, 3D models already have bounding spheres for their parts.
Which is the expected result of AABB collision detection?
This is fine and is the expected result of AABB. Example 2 shows a similar collision where the destination is further on the opposite side. As you can see, AABB has placed the response box on the opposite side of the block. Logically, this makes no sense as it has magically passed through the object.
How does the if statement work in AABB?
The if statement checks to see if there was a collision or not. If the collision time was not within 0 and 1, then obviously there was no collision during this frame. Also, the time when the collision first entered should never be after when it exited out the other side. This is checked, and if it failed, then we assume that there was no collision.
Where does the response box go in AABB?
As you can see, AABB has placed the response box on the opposite side of the block. Logically, this makes no sense as it has magically passed through the object. Example 3 shows a destination that doesn’t collide with the object. AABB will assume that there was no collision and the moving box will move through it like there was no collision at all.
How does collision detection work in 2D games?
Collision detection for these types of games is simple. You can simply maintain the game world in a two-dimensional array and check if the player’s desired movement will cause them to end up in a tile, and if so, prevent the movement.
What does bounding box mean in collision detection?
A bounding box refers to the smallest possible rectangle that can entirely contain a piece of geometry. In the bounding box method of collision detection, the bounding box of the player is compared with the bounding box of each platform and enemy (or more usually, just the ones in the vicinity of the player).
How are collision points defined in platform games?
These may be ‘sky’, ‘solid’, ‘flat’, ‘sloping’ etc. A number of collision points are defined around the player sprite, for example his feet, and for each tile type, a table is stored indicating what to do when a collision occurs on a specific pixel of the tile.
How to make a collision map in Excel?
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.
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.
How are polygons used in a collision test?
I assume this would also use polygons (boxes/triangles/circles) for a first-pass, quick-test for collisions, and if that test indicated a collision, it would then search for a per-pixel collision. This can be complicated, because we have to account for scale, rotation, and transparency.
How to use the Rectangle class in XNA?
The Rectangle class in XNA has 4 properties that can be of use here: Left, Top, Right and Bottom. You can use these to determine which side (s) the collision took place from. For example, consider the Player.Rectangle.Left > Map.Rectangle.Left.
How to collision detect two rectangles in MonoGame?
I have two rectangles, one player, one map. The player needs to not be able to walk through the map. Both the player and map have a rectangle with position and texture width and height, both also have a Vector position. Rectangle.Intersect () only outputs a boolean value, I cannot figure out how I might find out which side was collided with.
Is there collision on the right side of the rectangle?
If this is true, then the collision could have ocurred on the right side (given that the left side of the player is bigger on the X axis than the map’s, that means that the player is to the right of the left most point of the map). Basically you can compare the X and Y coordinates of both rectangles.