NvCloth 1.1.0 Release. (22041545)

1 files changed, 26 insertions, 0 deletions

diff --git a/NvCloth/samples/SampleBase/utils/Utils.h b/NvCloth/samples/SampleBase/utils/Utils.h
index 5e84e8e..1a5d5ee 100644
--- a/NvCloth/samples/SampleBase/utils/Utils.h
+++ b/NvCloth/samples/SampleBase/utils/Utils.h
@@ -3,6 +3,8 @@
 
 #include <DeviceManager.h>
 #include <assert.h>
+#include <foundation/PxVec3.h>
+#include <foundation/PxVec4.h>
 
 
 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
@@ -80,8 +82,32 @@ static const char* strext(const char* str)
 	return ext;
 }
 
+//Math utilities
 static inline float  lerp(float a, float b, float t)                          { return a + (b - a) * t; }
 
+/** returns a PxVec4 containing [x,y,z,d] for plane equation ax + by + cz + d = 0.
+* Where plane contains p and has normal n.
+*/
+inline physx::PxVec4 constructPlaneFromPointNormal(physx::PxVec3 p, physx::PxVec3 n)
+{
+	n.normalize();
+	return physx::PxVec4(n, -p.dot(n));
+}
+
+/** returns two vectors in b and c so that [a b c] form a basis.
+* a needs to be a unit vector.
+*/
+inline void computeBasis(const physx::PxVec3& a, physx::PxVec3* b, physx::PxVec3* c)
+{
+	if(fabsf(a.x) >= 0.57735f)
+		*b = physx::PxVec3(a.y, -a.x, 0.0f);
+	else
+		*b = physx::PxVec3(0.0f, a.z, -a.y);
+
+	*b = b->getNormalized();
+	*c = a.cross(*b);
+}
+
 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////