Moving An image

Blitz3D Forums/Blitz3D Programming/Moving An image

luke101

(Posted 2004) [#1]

I am having a problem moving an image...I know how to move an image straight up and straight down..but how would I move an image from one location to any location on the screen. I will appreciate any help

Ross C

(Posted 2004) [#2]

You will need to find the angle between the both of them. Once you have this, you can do :

image_x = image_x + cos(angle)
image_y = image_y + sin(angle)

To get the angle, you need the two points. Start point (x1,y1) and end point (x2,y2). Then:

angle = ATan2( y2 - y1, x2 - x1 )

I'm at college the now so i can't write up a demo, but the above will work :)

Ross C

(Posted 2004) [#3]

If you want to make the image move faster, mulitply the Sin and Cos numbers:


speed= 2

image_x = image_x + (Cos(angle) * speed)
image_y = image_y + (Sin(angle) * speed)

luke101

(Posted 2004) [#4]

wow...thank you

luke101

(Posted 2004) [#5]

is there a way to get the image to stop..at an exact point??

Rob Farley

(Posted 2004) [#6]

Graphics 640,480

Repeat

Cls

x1#=Rand(0,640)
x2#=Rand(0,640)
y1#=Rand(0,480)
y2#=Rand(0,480)

steps=Rand(1,50)


delx#=Float(x2-x1)/steps
dely#=Float(y2-y1)/steps



For n#=0 To steps
Cls
Color 255,0,0
Oval x1-5,y1-5,10,10,True
Oval x2-5,y2-5,10,10,True
Color 0,255,0
Oval x1+(delx*n)-5,y1+(dely*n)-5,10,10,True

Delay 50

Next

Until KeyHit(1)

Ross C

(Posted 2004) [#7]

Well, your stop point would be your end point :)

Just compare x and y co-ords, then stop the movement. :)

BlackJumper

(Posted 2004) [#8]

...angle between the both of them... at college the now so ...

Gotta love that Scottish dialect on the definite article. These are classic examples and you used the both of them in one posting ! Aw... the nice !