diff options
author | mano-wii <germano.costa@ig.com.br> | 2019-03-22 04:20:13 +0300 |
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committer | mano-wii <germano.costa@ig.com.br> | 2019-03-22 04:23:49 +0300 |
commit | 2b42b8b779cd29dd1d4531103cee6aa69643ac7b (patch) | |
tree | 15c01d0e72f1c2668d0ded4436e8dcd802913e7a /source/blender | |
parent | 1ae6aaad43ad1e021b2e8d8298bb389a4271d185 (diff) |
BLI Math: Add and use new `projmat_dimensions` utility.
Diffstat (limited to 'source/blender')
-rw-r--r-- | source/blender/blenlib/BLI_math_geom.h | 5 | ||||
-rw-r--r-- | source/blender/blenlib/intern/math_geom.c | 26 | ||||
-rw-r--r-- | source/blender/draw/intern/draw_manager_exec.c | 25 |
3 files changed, 40 insertions, 16 deletions
diff --git a/source/blender/blenlib/BLI_math_geom.h b/source/blender/blenlib/BLI_math_geom.h index 4d095ab1900..2f81fbf37f6 100644 --- a/source/blender/blenlib/BLI_math_geom.h +++ b/source/blender/blenlib/BLI_math_geom.h @@ -441,6 +441,11 @@ void window_translate_m4(float winmat[4][4], float perspmat[4][4], void planes_from_projmat(float mat[4][4], float left[4], float right[4], float top[4], float bottom[4], float front[4], float back[4]); +void projmat_dimensions(const float projmat[4][4], + float *r_left, float *r_right, + float *r_bottom, float *r_top, + float *r_near, float *r_far); + int box_clip_bounds_m4(float boundbox[2][3], const float bounds[4], float winmat[4][4]); void box_minmax_bounds_m4(float min[3], float max[3], diff --git a/source/blender/blenlib/intern/math_geom.c b/source/blender/blenlib/intern/math_geom.c index a513aca8e46..619a73f712f 100644 --- a/source/blender/blenlib/intern/math_geom.c +++ b/source/blender/blenlib/intern/math_geom.c @@ -4152,6 +4152,32 @@ void planes_from_projmat(float mat[4][4], float left[4], float right[4], float t } } +void projmat_dimensions(const float projmat[4][4], + float *r_left, float *r_right, + float *r_bottom, float *r_top, + float *r_near, float *r_far) +{ + bool is_persp = projmat[3][3] == 0.0f; + + if (is_persp) { + *r_left = (projmat[2][0] - 1.0f) / projmat[0][0]; + *r_right = (projmat[2][0] + 1.0f) / projmat[0][0]; + *r_bottom = (projmat[2][1] - 1.0f) / projmat[1][1]; + *r_top = (projmat[2][1] + 1.0f) / projmat[1][1]; + *r_near = projmat[3][2] / (projmat[2][2] - 1.0f); + *r_far = projmat[3][2] / (projmat[2][2] + 1.0f); + } + else { + *r_left = (-projmat[3][0] - 1.0f) / projmat[0][0]; + *r_right = (-projmat[3][0] + 1.0f) / projmat[0][0]; + *r_bottom = (-projmat[3][1] - 1.0f) / projmat[1][1]; + *r_top = (-projmat[3][1] + 1.0f) / projmat[1][1]; + *r_near = ( projmat[3][2] + 1.0f) / projmat[2][2]; + *r_far = ( projmat[3][2] - 1.0f) / projmat[2][2]; + } + +} + static void i_multmatrix(float icand[4][4], float Vm[4][4]) { int row, col; diff --git a/source/blender/draw/intern/draw_manager_exec.c b/source/blender/draw/intern/draw_manager_exec.c index dbbc847430e..b18e000665f 100644 --- a/source/blender/draw/intern/draw_manager_exec.c +++ b/source/blender/draw/intern/draw_manager_exec.c @@ -464,24 +464,17 @@ void DRW_state_clip_planes_set_from_rv3d(RegionView3D *rv3d) */ static void draw_frustum_boundbox_calc(const float(*projmat)[4], BoundBox *r_bbox) { - float near, far, left, right, bottom, top; + float left, right, bottom, top, near, far; bool is_persp = projmat[3][3] == 0.0f; + projmat_dimensions( + projmat, &left, &right, &bottom, &top, &near, &far); + if (is_persp) { - near = projmat[3][2] / (projmat[2][2] - 1.0f); - far = projmat[3][2] / (projmat[2][2] + 1.0f); - left = near * (projmat[2][0] - 1.0f) / projmat[0][0]; - right = near * (projmat[2][0] + 1.0f) / projmat[0][0]; - bottom = near * (projmat[2][1] - 1.0f) / projmat[1][1]; - top = near * (projmat[2][1] + 1.0f) / projmat[1][1]; - } - else { - near = ( projmat[3][2] + 1.0f) / projmat[2][2]; - far = ( projmat[3][2] - 1.0f) / projmat[2][2]; - left = (-projmat[3][0] - 1.0f) / projmat[0][0]; - right = (-projmat[3][0] + 1.0f) / projmat[0][0]; - bottom = (-projmat[3][1] - 1.0f) / projmat[1][1]; - top = (-projmat[3][1] + 1.0f) / projmat[1][1]; + left *= near; + right *= near; + bottom *= near; + top *= near; } r_bbox->vec[0][2] = r_bbox->vec[3][2] = r_bbox->vec[7][2] = r_bbox->vec[4][2] = -near; @@ -494,8 +487,8 @@ static void draw_frustum_boundbox_calc(const float(*projmat)[4], BoundBox *r_bbo if (is_persp) { float sca_far = far / near; left *= sca_far; - bottom *= sca_far; right *= sca_far; + bottom *= sca_far; top *= sca_far; } |