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Index › Programming Questions & Help › Syntax Questions › Re: Replacing cursor
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Re: Replacing cursor (Read 922 times)
kidult
Re: Replacing cursor
Apr 19th, 2007, 9:36pm  
this should help

float x = 100;
float y = 100;
// Background colour
PImage b;
// Declare variable "a" of type PImage
PImage a;
void setup() {
 // Background size
 size(420, 280);  
 // Load the images into the program  
 a = loadImage("rainbow.png");
 b = loadImage("background.png");

 noCursor();
}
void draw() {
 // Background colour
 background(b);
 fill(0);
 pushMatrix();
 translate(mouseX,mouseY);
 rotate(rotateValue);
 // Displays the image from point (0,0)
 image(a, 0, 0);
 popMatrix();
}
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goodonpaper
Re: Replacing cursor
Reply #1 - Apr 19th, 2007, 9:45pm  
Does rotateValue not have to equal/reference something?
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goodonpaper
Re: Replacing cursor
Reply #2 - Apr 21st, 2007, 10:26pm  
No? Cause its not rotating ...
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JohnG
Re: Replacing cursor
Reply #3 - Apr 22nd, 2007, 1:32pm  
rotatewValue is a value you need to create, and modify each frame by some ammount.
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goodonpaper
Re: Replacing cursor
Reply #4 - Apr 29th, 2007, 6:25pm  
So will that value have to reference another value which is constantly changing with every frame?

ie. rotate(rotatevalue); - and "rotatevalue" equaling the rotate value?

If so, how do I best accomplish a value that changes every frame that will make the image constantly rotate?
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JohnG
Re: Replacing cursor
Reply #5 - Apr 29th, 2007, 6:37pm  
Code:
float rotateValue;

void setup()
{
...
  rotateValue=0;
}

void draw()
{
  rotateValue+=0.1;
...
  rotate(rotateValue);
  
}
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goodonpaper
Re: Replacing cursor
Reply #6 - Apr 29th, 2007, 8:40pm  
Is there any way to have it rotate from the center axis?
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JohnG
Re: Replacing cursor
Reply #7 - Apr 29th, 2007, 8:56pm  
do: image(a,-a.width/2,-a.height/2);
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goodonpaper
Re: Replacing cursor
Reply #8 - Apr 30th, 2007, 12:12am  
Thank you!
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