rexy712/our_dick
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Change line-point intersection check to no longer be constrained to 3D space only

Browse Source
This commit is contained in:
rexy712 2020-12-02 15:34:05 -08:00
parent fd282607ae
commit aea6fb5320
1 changed files with 10 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
src/engine/collision.cpp
View File

@ -103,15 +103,18 @@ namespace egn{
math::vec3<float> ab = (l.point2 - l.point1);
math::vec3<float> ac = (r - l.point1);
//check if the point and line are colinear
if(math::fuzzy_neq(math::cross(ab, ac), math::vec3<float>(math::zero_initialize), epsilon))
//check if point is within the line segment
float c1 = ac * ab;
if(c1 < (0 - epsilon))
return false;
float c2 = ab * ab;
if(c2 < (c1 - epsilon))
return false;
//check if the point is between the endpoints of the line segment
float value = (ab * ac) / (ab * ab);
if(value >= (0.0f - epsilon) && value <= (1.0f + epsilon))
return true;
return false;
//check if the point is zero distance from the line
float b = c1 / c2;
math::vec3<float> pb = l.point1 + (ab * b);
return math::fuzzy_eq(r - pb, math::vec3<float>(math::zero_initialize), epsilon);
}
bool check_collision(const plane& l, const plane& r, float epsilon){
(void)l;