LÖVE

Alex wrote:Do not use applyForce() or applyImpulse(). They are broken hard. I've reported the bug and sent a patch, but until it goes through, use setVelocity(). It is not broken, and it's possible to model acceleration and jerk using only setVelocity and the time increment.

	void Body::applyImpulse(float jx, float jy)
	{
		body->ApplyImpulse(b2Vec2(jx, jy), body->GetWorldCenter());
	}

	void Body::applyImpulse(float jx, float jy, float rx, float ry)
	{
		body->ApplyImpulse(b2Vec2(jx, jy), b2Vec2(rx, ry));
	}

	void Body::applyTorque(float t)
	{
		body->ApplyTorque(t);
	}

	void Body::applyForce(float fx, float fy, float rx, float ry)
	{
		body->ApplyForce(b2Vec2(fx, fy), b2Vec2(rx, ry));
	}

	void Body::applyForce(float fx, float fy)
	{
		body->ApplyForce(b2Vec2(fx, fy), body->GetWorldCenter());
	}

Alex wrote:Do not use applyForce() or applyImpulse(). They are broken hard. I've reported the bug and sent a patch, but until it goes through, use setVelocity(). It is not broken, and it's possible to model acceleration and jerk using only setVelocity and the time increment.

Aside from that, lejeaunerenard is right. Derive your new x and y using the amount of force you want to apply (R) and the the angle that the object is rotated (theta):

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vx, vy = object:getVelocity()
newX, newY = R*math.cos(theta), R*math.sin(theta)
object:setVelocity(newX + vx, newY + vy)

Manny73211 wrote: ↑Mon Aug 05, 2024 7:41 am I tried this in 11.5 and it doesn't really work how i want it to. basically, it moves right instead of forwards. i do not understand the code so idk how to fix it. Here's the code:

Code: Select all

function love.load()
    wf = require "libraries/windfield"
    world = wf.newWorld(0, 0)

    love.graphics.setDefaultFilter("nearest", "nearest")

    p = {
        x = love.graphics.getWidth()/2,
        y = love.graphics.getHeight()/2,
        sprite = love.graphics.newImage("gfx/ArrowGuy.png"),
        rot = 0
    }
    p.collider = world:newRectangleCollider(p.x-40, p.y-40, p.sprite:getWidth()*5, (p.sprite:getHeight()-2)*5)
    p.collider:setAngularDamping(2)
    p.collider:setLinearDamping(1)
end

function love.update(dt)
    if love.keyboard.isDown("up") then
        p.collider:applyLinearImpulse(100*math.cos(p.collider:getAngle()),100*math.sin(p.collider:getAngle()))
    end

    if love.keyboard.isDown("left") then
        p.collider:applyAngularImpulse(-1000)
    end
    if love.keyboard.isDown("right") then
        p.collider:applyAngularImpulse(1000)
    end

    p.x = p.collider:getX()
    p.y = p.collider:getY()
    
    world:update(dt)
    p.rot = p.collider:getAngle()
end

function love.draw()
    --player
    love.graphics.draw(p.sprite, p.x, p.y, p.rot, 5, 5, 8, 8)
    --hitboxes
    world:draw()
end