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-rw-r--r--src/collision/ColSphere.cpp27
1 files changed, 27 insertions, 0 deletions
diff --git a/src/collision/ColSphere.cpp b/src/collision/ColSphere.cpp
new file mode 100644
index 00000000..65f02860
--- /dev/null
+++ b/src/collision/ColSphere.cpp
@@ -0,0 +1,27 @@
+#include "common.h"
+#include "ColSphere.h"
+#include "General.h"
+
+void
+CColSphere::Set(float radius, const CVector &center, uint8 surf, uint8 piece)
+{
+ this->radius = radius;
+ this->center = center;
+ this->surface = surf;
+ this->piece = piece;
+}
+
+bool
+CColSphere::IntersectRay(CVector const& from, CVector const& dir, CVector &entry, CVector &exit)
+{
+ CVector distToCenter = from - center;
+ float distToTouchSqr = distToCenter.MagnitudeSqr() - sq(radius);
+ float root1, root2;
+
+ if (!CGeneral::SolveQuadratic(1.0f, DotProduct(distToCenter, dir) * 2.f, distToTouchSqr, root1, root2))
+ return false;
+
+ entry = from + dir * root1;
+ exit = from + dir * root2;
+ return true;
+} \ No newline at end of file