Thanks

I'm trying to do some collision detection in an project where I cannot use external libraries. I am currently trying to do ellipsoid collision detection, but I am struggling. I used the library a little while ago and loved how the checkXXXCollisionEllipsoid methods work. I was wondering what algorithm they use.

Also, I just noticed I failed when I posted this, it is meant to be here:
http://www.jpct.net/forum2/index.php/board,3.0.html
If you want you can move it there, but it doesn't really matter

Quote from: EgonOlsen on May 01, 2012, 09:14:01 PM
I don't get the question. Formulas to load models? No libraries are being used. It's all build in...but as said: I don't get the actual question...

I was wondering what libraries were used for the model loading and collision detection. And for the collision detection, if no libraries were used, what formulas/equations is used to calculate the collision detected.

I was wondering what libraries/formulas are used to load models and do collision detection in jpct?

Lots

I guess I have to optimize the blitting then

Is there any way to write to the display without using blitting when using opengl?

I am having issues with the blitting slowing down the game.

k

Ok.


How mutch faster is the ogl renderer than the software renderer?

How slow is FrameBuffer.getOutputBuffer()?

When I used this method, I did not see any major performance changes.

How does one rotate with rotation matricies?

I'm using this code:
public SimpleVector deriveAngles(Matrix mat) {
    SimpleVector s=new SimpleVector();
    float[] m=mat.getDump();
    s.x=(float) Math.atan(m[9]/m[10]);
    s.y=(float) Math.asin(-m[2]);
    s.z=(float) Math.atan(m[4]/m[0]);
    return s;
}


Which is supposed to change rotation matrices to angles. (I think?)

But the following code does not work

Both objects should be rotated the same amount, but they arnt :?


Object3d obj1,obj2;
[make objects bla bla bla]
SimpleVector rot = deriveAngles(obj1.getRotationMatrix());
obj2.rotateY(rot.y);
obj2.rotateX(rot.x);
obj.rotateZ(rot.z);

changing the discard distance and attenuation didn't seem to change much.

I did notice small changes of the model changed it tho.

The model is made with Google Sketchup pro.

3ds:
http://www.mediafire.com/?llyqu6g34pwfksa

skp:
http://www.mediafire.com/?3p3fgv491oaewuv

Make sure the file is in the same directory that you get when you run:

new File(".").getAbsolutePath()

[I'm good with titles ]

:l?

The reason it is wierd, is because the light is in the center of the room.




world.addLight(new SimpleVector(0,-50,0),Color.WHITE);
Config.fadeoutLight=false;
world.setAmbientLight(10,10,10);


k :[