Rotating collision with a rotating map

[Path]

Hi, i'm using a tile map that rotates around its center, and i need consistent collision on each tile that will stay in the exact location and rotation as each tile. the issue is that all the tiles are rendered through love.graphics.draw, and when i rotate them with love.graphics.rotate and love.graphics.translated, the exact location of the tiles cannot be found, since their x or y value doesn't actually change. Is there some way to either get the position of the tiles after they are rotated and translated, or is there a way to also rotate all collision boxes in the same manner

[pedrosgali]

Hi, do you need to rotate your collisions? If the map is rotating on the screen their map position wont change, just the place you are drawing them. As far as your collisions are concerned the map wouldnt have moved at all. I may have misunderstood your question though.

[Path]

hi, this is what my map is doing

Screen Shot 2017-06-11 at 3.00.22 AM.png (19.45 KiB) Viewed 6076 times

this is one position where the map's rotation is 0. however, the game i'm making will have the map rotate in order to manipulate physics objects on the map, sort of like a pachinko puzzle, or one of these things





here is a case where the map is rotated

Screen Shot 2017-06-11 at 3.00.34 AM.png (24.12 KiB) Viewed 6076 times

each tile is an 8x8 square, and i need a system where the collision boxes will maintain the same position and rotation as each tile. However, the tile's x and y coordinates remain unchanged, since rotation/translation doesn't leave behind any gettable x or y coordinates.

[MadByte]

The map rotation/tilting doesn't need to affect the collisions and tile positions at all. You could just visually rotate and tilt the map and apply forces to the objects (ie. the ball) based on the rotation and tilting values you got.

[yetneverdone]

You can use love.graphics.rotation() to rotate all of your visuals. And with love.graphics.translate(), you can easily get the points

[Path]

You can use love.graphics.rotation() to rotate all of your visuals. And with love.graphics.translate(), you can easily get the points

the problem is that collision boxes aren't rotated by love.graphics.rotation, only the tiles are. the collision boxes are just coordinates that are being defined. and i already use love.graphics.rotation and that just rotates all the images, but it doesn't help since the collision doesn't move or rotate at all

The map rotation/tilting doesn't need to affect the collisions and tile positions at all. You could just visually rotate and tilt the map and apply forces to the objects (ie. the ball) based on the rotation and tilting values you got.

So essentially use a camera and rotate it, but apply the forces to the movable objects instead? that sounds feasible so i might try it

[yetneverdone]

May i know what you use for your collision boxes?

[Path]

May i know what you use for your collision boxes?

im using boundingbox.lua which was on the love site
https://love2d.org/wiki/BoundingBox.lua

im trying to avoid using actual physics and rather revert to simple gravity and velocity for the project, but i do want some form of collision, working at least along 90 degree angles

[Path]

Alright so i found a solution to what i'm saying. To get collision points to rotate and transform alongside the visual tilemap, i rotated all the points around the same origin the map was on, which produced good results



dx = xvertex - xaxis
dy = yvertex - yaxis

x = cos(θ) * dx - sin(θ) * dy + xaxis
y = sin(θ) * dx - cos(θ) * dy + yaxis

thank you to everyone that helped out