movement
Author
i want to move a sphere trough an terrain.
the sphere is in 3dspace and i want to move it in viewing direction.
when i rotate the sphere now i want to move in the new viewing direction.
i made a little test with this code in an normal nehe code but it dont make what i want.
glTranslatef(0.0,0.0,-z);
gluSphere(q,1,20,20);
glTranslatef(0.0,0.0,z);
glTranslatef(0.0,0.0,-z);
glRotatef(rot,0.0,1.0,0.0);
glTranslatef(0.0,0.0,z);
glBegin(GL_QUADS);
glTexCoord2f(0.0f, 0.0f); glVertex3f(-10.0, 0.0, -10.0);
glTexCoord2f(1.0f, 0.0f); glVertex3f( 10.0, 0.0, -10.0);
glTexCoord2f(1.0f, 1.0f); glVertex3f( 10.0, 0.0, 10.0);
glTexCoord2f(0.0f, 1.0f); glVertex3f(-10.0, 0.0, 10.0);
glEnd();
glTranslatef(0.0,0.0,-z);
glRotatef(-rot,0.0,1.0,0.0);
glTranslatef(0.0,0.0,z);
if(keys[VK_LEFT])
rot -= .01;
if(keys[VK_RIGHT])
rot += .01;
if(keys[VK_UP])
z += .01;
if(keys[VK_DOWN])
z -= .01;
please help me
You need to store the current x,y and modify them by (cos(rot), sin(rot)) when you try to move forward or backward.
Make a right clean schema (on paper!) of the general case (object not at origin, moving in a random direction) and figure out from it the transforms you need to view the object.
Make a right clean schema (on paper!) of the general case (object not at origin, moving in a random direction) and figure out from it the transforms you need to view the object.
Author
oh i told it in a stange way
i want to make a carrace
and now i have an object on in the space
when i press forwd the object shold move forward.
now i rotate the object (drive left or right)
and now when i pres forwd i must have a new direction to move
but when i use the code i made the object rotates but the direction is still the same (the object drives with sidestep
)
and now i need new help but in easy english please.
thanks
Edited by - the origin on February 16, 2002 2:13:28 PM
i want to make a carrace
and now i have an object on in the space
when i press forwd the object shold move forward.
now i rotate the object (drive left or right)
and now when i pres forwd i must have a new direction to move
but when i use the code i made the object rotates but the direction is still the same (the object drives with sidestep
)and now i need new help but in easy english please.
thanks
Edited by - the origin on February 16, 2002 2:13:28 PM
remember sin() and cos() use radians.. you can use this macro I made to convert your args to rads:
/*-------- Defines ---------------------------------------*/
#define PI 3.14159265
/*-------- Macros ----------------------------------------*/
#define NUM_TO_RAD(number) (number*PI)/180
// ..
/*..*/ sin( NUM_TO_RAD(90) ) /*..*/
- Sean
/*-------- Defines ---------------------------------------*/
#define PI 3.14159265
/*-------- Macros ----------------------------------------*/
#define NUM_TO_RAD(number) (number*PI)/180
// ..
/*..*/ sin( NUM_TO_RAD(90) ) /*..*/
- Sean
Author
i tried it with sin and cos but i cant get a good movement
may somebody post the view lines of code thtat i can move over the QUAD and when i rotate i get a new direction to move
and when i move again in the new direction i can rotate again and move in the new direction again ?
like a car forwd drive right; forwd; left ; forwd and so on.
thanks
Edited by - the origin on February 17, 2002 5:23:14 AM
may somebody post the view lines of code thtat i can move over the QUAD and when i rotate i get a new direction to move
and when i move again in the new direction i can rotate again and move in the new direction again ?
........>O ' O ' ' ^ ' ' ' ' ' ' 0.....>O ' \/ like a car forwd drive right; forwd; left ; forwd and so on.
thanks
Edited by - the origin on February 17, 2002 5:23:14 AM
This topic is closed to new replies.
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