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Draws a correct 3D boundingBox
#431424
10/16/13 00:26
10/16/13 00:26
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Joined: Nov 2007
Posts: 318
Brasil, Paraná
NeoNeper
OP
Senior Member
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OP
Senior Member
Joined: Nov 2007
Posts: 318
Brasil, Paraná
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I have a problem when trying to Draws a correct 3D bounding box on 3D Entity with Roll, tilt and pan. See picture for sample? PIC 1 - Here I managed to correctly simulate the boundBox http://uploaddeimagens.com.br/imagens/pic1-jpg--2 PIC 2 - In this second image, you can see that my function does not work when the object using Roll, Tilt and PAN http://uploaddeimagens.com.br/imagens/pic2-jpgMy Script
VECTOR modelMin,modelMax;
while(1)
{
vec_set(modelMin,modelSelect.min_x);
vec_rotate(modelMin,modelSelect.pan);
vec_add(modelMin,modelSelect.x);
vec_set(modelMax,modelSelect.max_x);
vec_rotate(modelMax,modelSelect.pan);
vec_add(modelMax,modelSelect.x);
draw_box3d(modelMin,modelMax,vector(0,255,180),100);
wait(1);
}
Last edited by NeoNeper; 10/16/13 16:57.
Please! Use easy words to be translated. because my English is not very good! Grateful.
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Re: Draws a correct 3D bounding with draw_box3d()
[Re: NeoNeper]
#431425
10/16/13 01:32
10/16/13 01:32
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Joined: Apr 2007
Posts: 3,751
Canada
WretchedSid
Expert
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Expert
Joined: Apr 2007
Posts: 3,751
Canada
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You can't express a rotated box with just two points, you need to defined all four. Basically, use the draw line method to draw a line from all anchor points to their neighbours.
Shitlord by trade and passion. Graphics programmer at Laminar Research. I write blog posts at feresignum.com
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Re: Draws a correct 3D bounding with draw_box3d()
[Re: WretchedSid]
#431469
10/16/13 14:27
10/16/13 14:27
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Joined: Nov 2007
Posts: 318
Brasil, Paraná
NeoNeper
OP
Senior Member
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OP
Senior Member
Joined: Nov 2007
Posts: 318
Brasil, Paraná
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Thank JustSid i understand (^.~). I used the same script to get the position of two corners of the object.
//corner 1
vec_set(corner1,modelSelect.min_x);
vec_rotate(corner1,modelSelect.pan);
vec_add(corner1,modelSelect.x);
draw_point3d(corner1,COLOR_RED,100,2);
//Corner2
vec_set(corner2,modelSelect.max_x);
vec_rotate(corner2,modelSelect.pan);
vec_add(corner2,modelSelect.x);
draw_point3d(corner2,COLOR_RED,100,2);
 But I am with great difficulty in the other two corners. Could you send me an example?
Please! Use easy words to be translated. because my English is not very good! Grateful.
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Re: Draws a correct 3D bounding with draw_box3d()
[Re: NeoNeper]
#431473
10/16/13 15:56
10/16/13 15:56
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Joined: Aug 2002
Posts: 3,258
Mainz
oliver2s
Expert
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Expert
Joined: Aug 2002
Posts: 3,258
Mainz
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Here you go:
void draw_rotated_bbox(ENTITY* ent)
{
VECTOR c1,c2,c3,c4,c5,c6,c7,c8;
vec_set(c1,vector(ent.min_x,ent.min_y,ent.min_z));
vec_rotate(c1,ent.pan);
vec_add(c1,ent.x);
vec_set(c2,vector(ent.max_x,ent.min_y,ent.min_z));
vec_rotate(c2,ent.pan);
vec_add(c2,ent.x);
vec_set(c3,vector(ent.max_x,ent.max_y,ent.min_z));
vec_rotate(c3,ent.pan);
vec_add(c3,ent.x);
vec_set(c4,vector(ent.min_x,ent.max_y,ent.min_z));
vec_rotate(c4,ent.pan);
vec_add(c4,ent.x);
vec_set(c5,vector(ent.min_x,ent.min_y,ent.max_z));
vec_rotate(c5,ent.pan);
vec_add(c5,ent.x);
vec_set(c6,vector(ent.max_x,ent.min_y,ent.max_z));
vec_rotate(c6,ent.pan);
vec_add(c6,ent.x);
vec_set(c7,vector(ent.max_x,ent.max_y,ent.max_z));
vec_rotate(c7,ent.pan);
vec_add(c7,ent.x);
vec_set(c8,vector(ent.min_x,ent.max_y,ent.max_z));
vec_rotate(c8,ent.pan);
vec_add(c8,ent.x);
draw_line3d(c1,NULL,100);
draw_line3d(c2,vector(0,255,0),100);
draw_line3d(c3,vector(0,255,0),100);
draw_line3d(c4,vector(0,255,0),100);
draw_line3d(c1,vector(0,255,0),100);
draw_line3d(c5,NULL,100);
draw_line3d(c6,vector(0,255,0),100);
draw_line3d(c7,vector(0,255,0),100);
draw_line3d(c8,vector(0,255,0),100);
draw_line3d(c5,vector(0,255,0),100);
draw_line3d(c1,NULL,100);
draw_line3d(c5,vector(0,255,0),100);
draw_line3d(c2,NULL,100);
draw_line3d(c6,vector(0,255,0),100);
draw_line3d(c3,NULL,100);
draw_line3d(c7,vector(0,255,0),100);
draw_line3d(c4,NULL,100);
draw_line3d(c8,vector(0,255,0),100);
}
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Re: Draws a correct 3D bounding with draw_box3d()
[Re: oliver2s]
#431477
10/16/13 17:09
10/16/13 17:09
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Joined: Nov 2007
Posts: 318
Brasil, Paraná
NeoNeper
OP
Senior Member
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OP
Senior Member
Joined: Nov 2007
Posts: 318
Brasil, Paraná
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Wonderful. It worked perfectly and was also very enlightening for me.
Now I can solve many other problems in my project.
I appreciate the attention. thank you
Please! Use easy words to be translated. because my English is not very good! Grateful.
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