Zecheriah
Member
EDIT! After testing a lot, I've found that this doesn't work on every wall. I dunno what's up with some of the walls but they just mess everything up. I'll edit the solution if I find a fix.
SOLUTION:
I scoured the internet, wikis and forums for hours (I started several days before I posted this). Then, I tried looking into the code of peoples' mods that do similar things. In Ray the Flying Squirrel's code, there is a wall grabbing mechanic that happened to contain 3 lines of code that did exactly what I wanted. Then I adapted them to work with my character (see code above).
What the code does is this:
ORIGINAL POST:
I'm making a character mod where the player drives a plane. The intention is that when you hit a wall head-on, you'll explode, but if you hit the wall at an angle (say, 45° or less), you should bounce off of it. So, I need a way to calculate what angle the player is hitting a wall/linedef at.
This head-on collision explodes you, as it should
Hitting a wall at an angle like this should not explode you (that'd get pretty annoying)
My current solution is to check the player's speed after they hit a wall, and if it's below a certain value, you explode. This has inconsistent results and I'd need the wall hit angle anyway to calculate how to bounce the player.
SOLUTION:
Calculate the angle the player hits the wall at:
local wallNormal = R_PointToAngle2(line.v1.x, line.v1.y, line.v2.x, line.v2.y) //finds the wall's normal angle (but I think +90°) based on its left and right edges
local playerMoAngle = R_PointToAngle2(0, 0, mobj.momx, mobj.momy) //finds the player's current angle of momentum
local hitAngle = wallNormal - playerMoAngle
//print the angles in readable values
print('wallNormal:' + (AngleFixed(wallNormal) / FRACUNIT))
print('hitAngle:' + ((AngleFixed(hitAngle) / FRACUNIT) - 270)) //-270 so that it's from -90° to 90°I scoured the internet, wikis and forums for hours (I started several days before I posted this). Then, I tried looking into the code of peoples' mods that do similar things. In Ray the Flying Squirrel's code, there is a wall grabbing mechanic that happened to contain 3 lines of code that did exactly what I wanted. Then I adapted them to work with my character (see code above).
What the code does is this:
- it calculates the normal angle of the wall (basically just the global angle the wall is facing)
- then it calculates the player's angle of momentum
- and finally it subtracts the player's angle from the wall's angle (resulting angle between 180° and 360°)
ORIGINAL POST:
I'm making a character mod where the player drives a plane. The intention is that when you hit a wall head-on, you'll explode, but if you hit the wall at an angle (say, 45° or less), you should bounce off of it. So, I need a way to calculate what angle the player is hitting a wall/linedef at.
This head-on collision explodes you, as it should
Hitting a wall at an angle like this should not explode you (that'd get pretty annoying)
My current solution is to check the player's speed after they hit a wall, and if it's below a certain value, you explode. This has inconsistent results and I'd need the wall hit angle anyway to calculate how to bounce the player.
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