Sprite Sheet help

Questions
41

@Jarc The collision still happens, but since you’re controlling the person, you’ll have to code for the collision. If a collision is detected, then don’t allow any motion in the current direction.

42

Collisions don’t work right if you try to override it. If the objects aren’t free to move on their own, you’ll get a collision detected but it won’t stop a manually moving object.

43

@dave1707 Sorry to bring this up again but I’m having a hard time understanding what you’re saying. I think the physics engine in Codea needs tweaking. The collision isn’t happening because my collision detector function would tell me. Here is a more simple example(project below). The sprite I don’t have the Dpad linked to collision works on everything but as soon as I link the Joystick to a sprite or collision body the collision only works on falling objects. I got this method from box2D physics simulator engine so not sure why it isn’t working here when physics principles are the same. The sprite I’m controlling shouldn’t be able to walk through the edge line.


displayMode(FULLSCREEN)

function setup()
    pic=readImage("Planet Cute:Character Boy")
    cx,cy=0,0
    sx,sy=WIDTH/2,HEIGHT/2
    dx,dy=0,0
       
    --Collider
    c1 = physics.body(CIRCLE,100,50)    -- sprite collision circle
    c1.type=KINEMATIC
    c1.x=dx
    c1.y=dy

    c2 = physics.body(CIRCLE,50)  -- falling circle
    c2.type=DYNAMIC
    c2.x=WIDTH/2
    c2.y=600
    c2.restitution=1
    
    c3 = physics.body (EDGE, vec2(200,200),vec2(400,400))
    c3.x1=200
    c3.y1=200
    c3.x2=400
    c3.y2=400 
    
end

function draw()
    background(40, 40, 50)
    
    sprite(asset.builtin.Tyrian_Remastered.Boss_D,c2.x,c2.y)
    
    --collider
    popStyle()
    stroke(255)
    strokeWidth(1)
    noFill()
    ellipse(c2.x,c2.y,100,100) 
    line(c3.x1,c3.y1,c3.x2,c3.y2)
    pushStyle() 
    
    if cx>0 and cy>0 then
        drawCirc()
    end
    sx=sx+dx
    sy=sy+dy

    c1.x=sx 
    c1.y=sy 
    
    sprite(pic,sx,sy)
    sprite(pic,c1.x,c1.y)
end

function touched(t)
    if t.state==BEGAN then
        cx,cy=t.x,t.y      
    end
    if t.state==MOVING then
        if insideCircle(t.x,t.y) then
            dx=(t.x-cx)/10
            dy=(t.y-cy)/10
        else
            cx,cy=0,0
            dx,dy=0,0
        end
    end
    if t.state==ENDED then
        cc,cy=0,0
        dx,dy=0,0
    end
end

function insideCircle(x,y)
    -- check if touch is inside of circle or ellipse
    a,b=100,100 -- radius of circle or a,b of ellipse
    if (x-cx)^2/a^2+(y-cy)^2/b^2 <= 1 then 
        return true
    end
    return false
end

function drawCirc()
    fill(255, 255, 255, 50)
    ellipse(cx,cy,50) -- draw circle center
    fontSize(15)
    fill(233, 80, 133)
    text("Up",cx,cy+80)
    text("Down",cx,cy-80)
    text("Right",cx+80,cy)
    text("Left",cx-80,cy)
    fontSize(10)
    text("DTL",cx-60,cy+60)
    text("DTR",cx+60,cy+60)
    text("DBL",cx-60,cy-60)
    text("DBR",cx+60,cy-60)
    noFill()
    stroke(255,255,255,50)
    strokeWidth(4)
    ellipse(cx,cy,200) -- draw outer circle     
end

function collide(c)  -- this gets called when a collision occurs
    if c.state==BEGAN then
        print("\
collision")
        print("radius of body A ",c.bodyA.radius)
        print("radius of body B ",c.bodyB.radius)
    end  
end