Request Help ==>> covert local rotation to global rotation

[mohsen.nikroo]

Request Help

 

To move the boat on the surface of the water waves on the boat

I wave height across the water and I have to manually rotate my boat

 

My problem is in the local and global direction

I need to convert global to local rotation

[ulf.schroeter]

What do you mean by local rotation/direction ? A rotation expresses translational/rotational differences BETWEEN two ore more reference frames/coordinate systems. It would be very helpful if you could provide a simple drawing of your coordinate frames (world/local) to illustrate your problem.

[mohsen.nikroo]

This Code Used To Move Boat

 

 

#include <Project/scripts/euler.h>
#include <core/scripts/camera.h>
#include <math.h>[/color]
[color=#b22222]int init() {
CreateBoat();
SetPlayer();

Boat_UP.setTransform(transform);
Boat_UP.setPosition(vec3(0,0,0));
[/color]
[color=#b22222]return 1;
}
int update() {

  GetKeyState();
  quat r=Boat_UP.getRotation();
  ControlBoat();
return 1;
}
void GetPoint(){
vec3 pos=Boat_UP.getPosition();
float F,B, L,R;
float e1=(L_AngularVelocity + R_AngularVelocity+1.0f) ;
//===============================
B=water2.getHeight(vec3(pos.x-6,pos.y,0));
F=water2.getHeight(vec3(pos.x+6,pos.y,0));
//===============================
R=water2.getHeight(vec3(pos.x,pos.y+1.2f,pos.z+0.01f));
L= water2.getHeight(vec3(pos.x,pos.y-1.2f,pos.z+0.01f));
//===============================[/color]
[color=#b22222]Rot_X = ((L -R)*0.1f);
Rot_Y = ((F-B)*0.03f);
Rot_Z =( L_AngularVelocity - R_AngularVelocity)*0.01f+(farmoon*(L_AngularVelocity+R_AngularVelocity)/1000.0f);
//engine.message("  Rot_X= %2.3f  Rot_Y= %2.3f  Rot_Z= %2.3f \n\n",Rot_X,Rot_Y,Rot_Z);
}
void ControlBoat(){
 GetKeyState();
update_speed();
GetPoint();
 vec3 pos=Boat_UP.getPosition();
 vec3 dir=persecutor.getDirection();
//================================

pos.x+=((L_AngularVelocity+R_AngularVelocity)/400.0f)*dir.x;
pos.y+=((L_AngularVelocity+R_AngularVelocity)/400.0f)*dir.y;
pos.z=(pos.z-water2.getHeight(Boat_UP.getPosition()))/30.0f ;
Boat_UP.setPosition(pos);
setRot();



}
void setRot(){//
mat4  transform = Boat_UP.getTransform() *rotateY(Rot_Y) *  rotateX(Rot_X)* rotateZ(Rot_Z) ; 
 } 

}

}
[/color]





[color=#b22222]

[mohsen.nikroo]

My problem.

Boat is in rotation

I need code to convert world to local rotation

[mohsen.nikroo]

local to world rotation(x,y,z)

and

World to local Rotation(x,y,z)

[ulf.schroeter]

Your code is quite hard to understand, but maybe this paper can provide a solution to your problem. Still - at least for me - your local rotation reference frame it unclear (as rotation definies attitude difference between 2 referenec frames)

[mohsen.nikroo]

Thank you

More details

I am using the following method to move the boat

Take four point

 

  	vec3 pos=Boat_UP.getPosition();
float F,B, L,R;
vec3 point1,point2,point3,point4 ;
point1=vec3(pos.x-6,pos.y,0)
point2=vec3(pos.x+6,pos.y,0)
point3=vec3(pos.x,pos.y+1.2f,pos.z+0.01f)
point4=vec3(pos.x,pos.y-1.2f,pos.z+0.01f)

[mohsen.nikroo]

And the wave height of the water in this four-point gain

//===============================
B=water2.getHeight(point1);
F=water2.getHeight(point2);
//===============================
R=water2.getHeight(point3);
L= water2.getHeight(point4);
//===============================

Water wave impact on the boat to do the following acts

Rot_X = ((L -R)*0.1f);
Rot_Y = ((F-B)*0.03f);
Rot_Z =( L_AngularVelocity - R_AngularVelocity)*0.01f+(farmoon*(L_AngularVelocity+R_AngularVelocity)/1000.0f);
mat4  transform = Boat_UP.getTransform() *rotateY(Rot_Y) *  rotateX(Rot_X)*rotateZ(Rot_Z) ;
Boat_UP.setTransform(transform );

Edited January 6, 2013 by mohsen.nikroo

[mohsen.nikroo]

But

While rotating boat

Acts Invert X Rotation And Y Rotation

I solved the problem of what method I use?

[manguste]

Mohsen, it's really hard to understand your code, and it is not clear what the problem is and what do you want to get as a result.

 

Maybe if you explain it in a more clear way, attach screenshots (and draw how you want your boats to be rotated), we could help you. Right now we can't get you, sorry.