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11 COPYRIGHT 1993-1998 PARALLAX SOFTWARE CORPORATION. ALL RIGHTS RESERVED.
14 * $Source: /cvs/cvsroot/d2x/3d/matrix.c,v $
15 * $Revision: 1.1.1.1 $
17 * $Date: 2001-01-19 03:29:58 $
19 * Matrix setup & manipulation routines
21 * $Log: not supported by cvs2svn $
22 * Revision 1.1.1.1 1999/06/14 21:57:48 donut
23 * Import of d1x 1.37 source.
25 * Revision 1.1 1995/05/05 08:52:11 allender
28 * Revision 1.1 1995/04/17 04:14:34 matt
36 static char rcsid[] = "$Id: matrix.c,v 1.1.1.1 2001-01-19 03:29:58 bradleyb Exp $";
46 void scale_matrix(void);
48 //set view from x,y,z & p,b,h, zoom. Must call one of g3_set_view_*()
49 void g3_set_view_angles(vms_vector *view_pos,vms_angvec *view_orient,fix zoom)
52 View_position = *view_pos;
54 vm_angles_2_matrix(&View_matrix,view_orient);
57 Win32_set_view_matrix ();
63 //set view from x,y,z, viewer matrix, and zoom. Must call one of g3_set_view_*()
64 void g3_set_view_matrix(vms_vector *view_pos,vms_matrix *view_matrix,fix zoom)
67 View_position = *view_pos;
69 View_matrix = *view_matrix;
72 Win32_set_view_matrix ();
78 //performs aspect scaling on global view matrix
79 void scale_matrix(void)
81 Unscaled_matrix = View_matrix; //so we can use unscaled if we want
83 Matrix_scale = Window_scale;
85 if (View_zoom <= f1_0) //zoom in by scaling z
87 Matrix_scale.z = fixmul(Matrix_scale.z,View_zoom);
89 else { //zoom out by scaling x&y
91 fix s = fixdiv(f1_0,View_zoom);
93 Matrix_scale.x = fixmul(Matrix_scale.x,s);
94 Matrix_scale.y = fixmul(Matrix_scale.y,s);
97 //now scale matrix elements
99 vm_vec_scale(&View_matrix.rvec,Matrix_scale.x);
100 vm_vec_scale(&View_matrix.uvec,Matrix_scale.y);
101 vm_vec_scale(&View_matrix.fvec,Matrix_scale.z);