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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1 | pmbaty | 1 | /* |
| 2 | * This file is part of the DXX-Rebirth project <https://www.dxx-rebirth.com/>. |
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| 3 | * It is copyright by its individual contributors, as recorded in the |
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| 4 | * project's Git history. See COPYING.txt at the top level for license |
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| 5 | * terms and a link to the Git history. |
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| 6 | */ |
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| 7 | /* |
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| 8 | * |
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| 9 | * Matrix setup & manipulation routines |
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| 10 | * |
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| 11 | */ |
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| 12 | |||
| 13 | |||
| 14 | #include "3d.h" |
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| 15 | #include "globvars.h" |
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| 16 | |||
| 17 | namespace dcx { |
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| 18 | |||
| 19 | static void scale_matrix(void); |
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| 20 | |||
| 21 | //set view from x,y,z, viewer matrix, and zoom. Must call one of g3_set_view_*() |
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| 22 | void g3_set_view_matrix(const vms_vector &view_pos,const vms_matrix &view_matrix,fix zoom) |
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| 23 | { |
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| 24 | View_zoom = zoom; |
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| 25 | View_position = view_pos; |
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| 26 | View_matrix = view_matrix; |
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| 27 | scale_matrix(); |
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| 28 | } |
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| 29 | |||
| 30 | //performs aspect scaling on global view matrix |
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| 31 | static void scale_matrix(void) |
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| 32 | { |
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| 33 | Unscaled_matrix = View_matrix; //so we can use unscaled if we want |
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| 34 | |||
| 35 | Matrix_scale = Window_scale; |
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| 36 | |||
| 37 | if (View_zoom <= f1_0) //zoom in by scaling z |
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| 38 | |||
| 39 | Matrix_scale.z = fixmul(Matrix_scale.z,View_zoom); |
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| 40 | |||
| 41 | else { //zoom out by scaling x&y |
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| 42 | |||
| 43 | fix s = fixdiv(f1_0,View_zoom); |
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| 44 | |||
| 45 | Matrix_scale.x = fixmul(Matrix_scale.x,s); |
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| 46 | Matrix_scale.y = fixmul(Matrix_scale.y,s); |
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| 47 | } |
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| 48 | |||
| 49 | //now scale matrix elements |
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| 50 | |||
| 51 | vm_vec_scale(View_matrix.rvec,Matrix_scale.x); |
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| 52 | vm_vec_scale(View_matrix.uvec,Matrix_scale.y); |
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| 53 | vm_vec_scale(View_matrix.fvec,Matrix_scale.z); |
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| 54 | |||
| 55 | } |
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| 56 | |||
| 57 | } |