Collision - bitmap background

[mLaPL]

please help me... i try but cant create good collision.

this is map from game, map is none object ( standard png image ) player hero image is png format 48x64. how create good collision for elements from image ?

this is map (1024x768)


and this is first plan to hide hero to back (1024x768)

[Illidane]

I think you need to place rectangle shapes on your level, that hero may collide with it.

[mLaPL]

i try with rectangle and for me this is not what i need :/ the best way if can I use line collision.

i have problem with none horizontal and none vertical lines :/ like this on image.

i use to collision one center point from hero image.

[mLaPL]

eureka... Collision - Point with any Line. For me this thopic is closed thx...

Code: Select all

function PointCollisionWithLine(x,y,x1,y1,x2,y2,tolerance)

        -- range from x,y to x1,y1
	a = x - x1
	b = y - y1
	c = (a*a) + (b*b)
	c1 = math.sqrt(c)
	
        -- range from x,y to x2,y2
	a = x - x2
	b = y - y2
	c = (a*a) + (b*b)
	c2 = math.sqrt(c)
	
        -- range from x1,y1 to x2,y2
	a = x1 - x2
	b = y1 - y2
	c = (a*a) + (b*b)
        c3 = math.sqrt(c)

       if (c1+c2)<=(c3+tolerance) then return true else return false end

end

[Skofo]

Woo! You're pretty smart.

[mLaPL]

thx...

good think for this is the same function but short.

if collision lines is constant then we not must calculate line range any time, we can use function like this:

Code: Select all

function PointCollisionWithLine2(x,y,x1,y1,x2,y2,line_range_with_tolerance)

        -- range from x,y to x1,y1
   a = x - x1
   b = y - y1
   c1 = math.sqrt((a*a) + (b*b))
   
        -- range from x,y to x2,y2
   a = x - x2
   b = y - y2
   c2 = math.sqrt((a*a) + (b*b))

       if (c1+c2)<=line_range_with_tolerance then return true else return false end

end