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Topic: rotate a image around his origin (Read 335 times) |
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capeta
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rotate a image around his origin
« on: Nov 30th, 2004, 5:23am » |
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lets change this:
does anybody knows how to rotate a image (ie:sprite) without rotating the whole scene ? i just want the image to face some point. 
any one ?
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| « Last Edit: Dec 1st, 2004, 3:31am by capeta » |
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st33d
 
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Re: rotate a image around his origin
« Reply #1 on: Dec 2nd, 2004, 2:23am » |
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As far as I know the whole scene shouldn't rotate. If you use the rotate() comand it only changes the co-ord system not the stage. In order to get your image to face a direction you're probably going to have to re-draw the background anyway and that should take no time at all with a loaded image.
I've butchered the sprite demo by the Presstube geezer to demonstrate an example of something rotating with a static scene. I this case 1.gif is a 20,20 image and 2.gif is a 40,40 image.
Code:
Sprite one,two;
float theta = 0;
void setup(){
size(40,40);
one = new Sprite("1.gif");
two = new Sprite("2.gif");
framerate(24);
}
void loop(){
two.display(0,0);
push();
theta = (theta+0.1)%360;
translate(10,20);
rotate(theta);
one.display(0,0);
pop();
}
class Sprite{
BImage i;
Sprite(String imageName){
loadImages(imageName);
}
void loadImages(String name){
i = loadImage(name);
}
void display(float xpos, float ypos){
image(i, xpos, ypos);
}
}
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Was this what you meant?
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I could murder a pint.
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capeta
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Re: rotate a image around his origin
« Reply #2 on: Dec 2nd, 2004, 7:57pm » |
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yes thank you! i just needed someone to explain me pop() and push(). all clear now! 
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