c_trace and view entity

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c_trace and view entity #377285 07/11/11 19:12 07/11/11 19:12
Joined: Apr 2008 Posts: 245 GameScore OP Member
GameScore OP Member Joined: Apr 2008 Posts: 245	hi, is it possible to start a c_trace from a view entity? how can i do that?

Re: c_trace and view entity [Re: GameScore] #377286
07/11/11 19:26 07/11/11 19:26

Joined: Mar 2009
Posts: 88

Walori

Junior Member

Walori

Junior Member

Joined: Mar 2009
Posts: 88

It'd be something like this:

Code:

ENTITY * ent = some_entity;
function trace()
{

   var distance_from_camera = 0;
   VECTOR mouse_to_world;
   vec_set(mouse_to_world,vector(ent.x,ent.y,distance_from_camera));
   vec_for_screen (mouse_to_world, camera);

   c_trace(mouse_to_world,vec_to_somewhere,IGNORE_ME);

}

Last edited by Walori; 07/11/11 19:27.

Re: c_trace and view entity [Re: Walori] #377291 07/11/11 20:15 07/11/11 20:15
Joined: Apr 2008 Posts: 245 GameScore OP Member
GameScore OP Member Joined: Apr 2008 Posts: 245	thnx, but no solution it doesnt work i want to start a c_trace from a view entity but the c_trace starts in the middle of the lvl look here is the code i use vec_set(trace_coords.x, vector(1500, 0, 0)); vec_rotate(trace_coords.x, laser_gun.pan); vec_add(trace_coords.x, laser_gun.x); if (c_trace(laser_gun.x, trace_coords.x, IGNORE_ME ) > 0) // hit something? { draw_line3d(my.x,NULL,100); draw_line3d(my.x,COLOR_RED,100); draw_line3d(target.x,COLOR_RED,100); draw_point3d(target.x,COLOR_RED,100,3); } maybe i need to use vec_for_screen but i do not know how

Re: c_trace and view entity [Re: GameScore] #377295 07/11/11 20:58 07/11/11 20:58
Joined: Feb 2011 Posts: 135 Myrkling Member
Myrkling Member Joined: Feb 2011 Posts: 135	vec_for_screen is used to convert screen coordinates into world coordinates. However, as view entities are located neither in sceen space nor in world space but in view space, vec_for_screen alone is not enough: Before using vec_for_screen you have to use rel_to_screen to convert the view entity's coordinates into screen coordinates. So just add a rel_to_sceen to Walori's code. This should do the trick.

Re: c_trace and view entity [Re: Myrkling] #377370 07/12/11 15:43 07/12/11 15:43
Joined: Apr 2008 Posts: 245 GameScore OP Member
GameScore OP Member Joined: Apr 2008 Posts: 245	i was trying but i find no solution

Re: c_trace and view entity [Re: GameScore] #377442 07/13/11 08:20 07/13/11 08:20
Joined: Aug 2008 Posts: 482 B bart_the_13th Senior Member
bart_the_13th Senior Member B Joined: Aug 2008 Posts: 482	The view entity is inside the camera, so you can use Code: c_trace(camera.x, trace_coords.x, IGNORE_ME ) [EDIT] in case you want to have 'offset' from the lasergun.x Code: VECTOR temp; ... vec_set(temp.x, lasergun.x); vec_rotate(temp.x,camera.pan); c_trace(vec_add(camera.x, temp.x), trace_coords.x, IGNORE_ME ); Warning: the code is not tested Last edited by bart_the_13th; 07/13/11 08:26.

Re: c_trace and view entity [Re: bart_the_13th] #377898 07/17/11 18:54 07/17/11 18:54
Joined: Apr 2008 Posts: 245 GameScore OP Member
GameScore OP Member Joined: Apr 2008 Posts: 245	i got it tnx

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