diff options
| author | quou <quou@disroot.org> | 2025-01-21 00:16:17 +1100 |
|---|---|---|
| committer | quou <quou@disroot.org> | 2025-01-21 00:16:17 +1100 |
| commit | 9cab0d4634ab6cdc180f9ab49939854f3d72bf01 (patch) | |
| tree | 4f681e0dac6e93645d41bc9ad448994d941d0ef3 | |
| parent | f68f2df575bca6e75cd8905e926ea823b1f379d5 (diff) | |
arrow drawing function
| -rw-r--r-- | debugdraw.cpp | 15 | ||||
| -rw-r--r-- | debugdraw.hpp | 1 |
2 files changed, 16 insertions, 0 deletions
diff --git a/debugdraw.cpp b/debugdraw.cpp index 43527ab..8331a38 100644 --- a/debugdraw.cpp +++ b/debugdraw.cpp @@ -67,6 +67,21 @@ void Line_Renderer::add_line(const v3f& s, const v3f& e) { cur++; } +void Line_Renderer::add_arrow(const v3f& s, const v3f& e) { + v3f tang(0.0f, 1.0f, 0.0f); + v3f dir = v3f::normalised(e - s); + v4f dir4 = v4f(dir, 0.0f); + float d = v3f::dot(tang, dir); + if (d > 0.999f || d < -0.999f) + tang = v3f(1.0f, 0.0f, 0.0f); + tang = v3f::cross(tang, dir); + const m4f a = m4f::rotate(m4f::identity(), 2.8f, tang); + const m4f b = m4f::rotate(m4f::identity(), 3.5f, tang); + add_line(s, e); + add_line(e, e + (a * dir4).xyz() * 0.1f); + add_line(e, e + (b * dir4).xyz() * 0.1f); +} + void Line_Renderer::add_box(const AABB& b) { add_line(v3f(b.max.x, b.max.y, b.max.z), v3f(b.max.x, b.max.y, b.min.z)); add_line(v3f(b.max.x, b.max.y, b.max.z), v3f(b.max.x, b.min.y, b.max.z)); diff --git a/debugdraw.hpp b/debugdraw.hpp index e5142dc..0463eb3 100644 --- a/debugdraw.hpp +++ b/debugdraw.hpp @@ -30,6 +30,7 @@ struct Line_Renderer { void begin(int wi, int he); void colour(const v3f& c); void add_line(const v3f& s, const v3f& e); + void add_arrow(const v3f& s, const v3f& e); void add_box(const AABB& b); void flush( const Camera& cam, |