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DRW: New function DRW_culling_min_max_test 

For testing intersection with frustrum planes without having to transform all bound box vertices into global space.
This commit is contained in:
Germano Cavalcante 2019-08-15 10:17:41 -03:00
parent 78b56fa7d9
commit 261a02fc59
2 changed files with 22 additions and 0 deletions
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1
source/blender/draw/intern/DRW_render.h
View File

@ -597,6 +597,7 @@ bool DRW_view_is_persp_get(const DRWView *view);
bool DRW_culling_sphere_test(const DRWView *view, const BoundSphere *bsphere);
bool DRW_culling_box_test(const DRWView *view, const BoundBox *bbox);
bool DRW_culling_plane_test(const DRWView *view, const float plane[4]);
bool DRW_culling_min_max_test(const DRWView *view, float obmat[4][4], float min[3], float max[3]);
void DRW_culling_frustum_corners_get(const DRWView *view, BoundBox *corners);
void DRW_culling_frustum_planes_get(const DRWView *view, float planes[6][4]);

21
source/blender/draw/intern/draw_manager_exec.c
View File

@ -22,6 +22,7 @@
#include "draw_manager.h"
#include "BLI_math.h"
#include "BLI_math_bits.h"
#include "BLI_memblock.h"
@ -488,6 +489,26 @@ bool DRW_culling_plane_test(const DRWView *view, const float plane[4])
return draw_culling_plane_test(&view->frustum_corners, plane);
}
/* Return True if the given box intersect the current view frustum.
* This function will have to be replaced when world space bb per objects is implemented. */
bool DRW_culling_min_max_test(const DRWView *view, float obmat[4][4], float min[3], float max[3])
{
view = view ? view : DST.view_default;
float tobmat[4][4];
transpose_m4_m4(tobmat, obmat);
for (int i = 6; i--;) {
float frustum_plane_local[4], bb_near[3], bb_far[3];
mul_v4_m4v4(frustum_plane_local, tobmat, view->frustum_planes[i]);
aabb_get_near_far_from_plane(frustum_plane_local, min, max, bb_near, bb_far);
if (plane_point_side_v3(frustum_plane_local, bb_far) < 0.0f) {
return false;
}
}
return true;
}
void DRW_culling_frustum_corners_get(const DRWView *view, BoundBox *corners)
{
view = view ? view : DST.view_default;