Archived

This topic is now archived and is closed to further replies.

soreno

worldcraft .map file and 4. coordinate

Recommended Posts

soreno    122
The following data is from a worldcraft .map file. It describes a cube (16x16x16). How do i calculate the 4. coordinate so I can draw a polygon?
  
(  8,  8,  8 ) (  8, -8,  8 ) ( -8, -8,  8 ) //front

(  8, -8, -8 ) (  8,  8, -8 ) ( -8,  8, -8 ) //back

( -8, -8,  8 ) ( -8, -8, -8 ) ( -8,  8, -8 ) //left

(  8, -8, -8 ) (  8, -8,  8 ) (  8,  8,  8 ) //right

( -8,  8,  8 ) ( -8,  8, -8 ) (  8,  8, -8 ) //top

( -8, -8, -8 ) ( -8, -8,  8 ) (  8, -8,  8 ) //bund


glBegin(GL_POLYGON);
  //front

  glVertex3f( 8, 8, 8);
  glVertex3f( 8,-8, 8);
  glVertex3f(-8,-8, 8);
  glVertex3f(??,??,??);
glEnd();
  
Edited by - soreno on January 10, 2002 4:45:01 AM

Share this post


Link to post
Share on other sites
rapso    180
glBegin(GL_POLYGON);
//front
glVertex3f( 8, 8, 8);
glVertex3f( 8,-8, 8);
glVertex3f(-8,-8, 8);
glVertex3f(-8, 8, 8);
glEnd();

I''m not sure, but:

x y
+ +
+ -
- -
- + <-- isn''t it a logical idea

Share this post


Link to post
Share on other sites
rapso    180
let me try


CVector v1,v2,v3,v4;

v1=CVector( 8.f, 8.f, 8.f);
v2=CVector( 8.f,-8.f, 8.f);
v3=CVector(-8.f,-8.f, 8.f);
v4=(v1+v3)*0.5f + ( (v1+v3)*0.5f - v2 );

/*
x4=(x1+x3)*0.5f + ( (x1+x3)*0.5f - x2 );
y4=(y1+y3)*0.5f + ( (y1+y3)*0.5f - y2 );
z4=(z1+z3)*0.5f + ( (z1+z3)*0.5f - z2 );
*/
this would be the way I''d do it. (hope there are no bugs)

Share this post


Link to post
Share on other sites
rodzilla    133
Could it be the following ?

Vertex A : xa, ya, za
Vertex B : xb, yb, zb
Vertex C : xc, yc, zc
Vertex D : xc+xb-xa, yc+yb-ya, zc+zb-za

so that AB = DC (vectors I mean).

Share this post


Link to post
Share on other sites
Maximus    124
.map files dont store poly vertices, they store 3 points on a plane. Where the 3 plane cross, a vertice exists. Build your polys from those.

Share this post


Link to post
Share on other sites
leblebi    124
There is an "Export to .MAP" option in file pull-down menu. However, save your levels in progress as RMF format since WorldCraft''s MAP is quite buggy.
Oztan.

Share this post


Link to post
Share on other sites
ARID    122
tisk tisk tisk abandoning a project just because of a few bumps along the road. It took me 3 days to modify my terrain engine for triangle strips and to get textures to work properly. Don''t stop finish it.

Share this post


Link to post
Share on other sites
soreno    122
I 100% understand your comment, and would probably have made some similar comment if I was you. However I feel the need to defend myself and will do so..
Actually it''s only that part of the project that''s cancled. Mainly because schools is though this semester, but also because I figured it''s tooo damn early in my process of learning gl to use worldcraft as an editor. There are still some more basic stuff to be learned..

Share this post


Link to post
Share on other sites