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# Collision Detection - PowerPoint PPT Presentation

Collision Detection. Barclays Apps Teaching Course - 2013. Collisions. Collision detection typically refers to the computational problem of detecting the intersection of – from two or more objects Interactive games use collision detection Can be done by Objects or Using Images.

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## PowerPoint Slideshow about ' Collision Detection' - jordan-white

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Presentation Transcript

### Collision Detection

Barclays Apps Teaching Course - 2013

• Collision detection typically refers to the computational problem of detecting the intersection of – from two or more objects

• Interactive games use collision detection

• Can be done by Objects or Using Images

• Point and Rectangle

• If you want to know if a point is in a rectangle – say a button

w

(x,y)

h

(px,py)

Point in Rectangle

• You know the X and Y of the point = px and py

• You know the Location X and Y of the Rectangle and also the Width and Height = x,y ,w,h

• Inside =((px>=x)And(px<=(x+w-1))And(py>=y)And(py<=(y+h-1)))

• Images are a series of numbers in a file

• Each number is a pixel value – colour

1100, 1222,22112,22112,3443,222322,444,3223,21222,4332

• Similar approach – but search through the image and detect what the colour is

w

(x,y)

(px,py)