cpvslerp tests

gistfile1.txt

  {
		cpVect a = cpvmult(cpvforangle(0.0), 1.0);
		cpVect b = cpvmult(cpvforangle(1.0), 1.0);
		cpVect c = a;
		cpVect v = cpvslerp(a, b, 0.0);
		GHAssertLessThan(cpvdist(v, c), (cpFloat)1e-5, nil);
	}
	
	{
		cpVect a = cpvmult(cpvforangle(0.0), 1.0);
		cpVect b = cpvmult(cpvforangle(1.0), 1.0);
		cpVect c = b;
		cpVect v = cpvslerp(a, b, 1.0);
		GHAssertLessThan(cpvdist(v, c), (cpFloat)1e-5, nil);
	}
	
	{
		cpVect a = cpvmult(cpvforangle(0.0), 1.0);
		cpVect b = cpvmult(cpvforangle(1.0), 1.0);
		cpVect c = cpvmult(cpvforangle(0.5), 1.0);
		cpVect v = cpvslerp(a, b, 0.5);
		GHAssertLessThan(cpvdist(v, c), (cpFloat)1e-5, nil);
	}
	
	{
		cpVect a = cpvmult(cpvforangle(-1.0), 1.0);
		cpVect b = cpvmult(cpvforangle( 1.0), 1.0);
		cpVect c = cpvmult(cpvforangle( 0.0), 1.0);
		cpVect v = cpvslerp(a, b, 0.5);
		GHAssertLessThan(cpvdist(v, c), (cpFloat)1e-5, nil);
	}
	
	{
		cpVect a = cpvmult(cpvforangle(0.0), 1.0);
		cpVect b = cpvmult(cpvforangle(M_PI/2.0), 2.0);
		cpVect c = cpvadd(cpvmult(a, cpfcos(M_PI/4.0)), cpvmult(b, cpfsin(M_PI/4.0)));
		cpVect v = cpvslerp(a, b, 0.5);
		GHAssertLessThan(cpvdist(v, c), (cpFloat)1e-5, nil);
	}
	
	{
		cpVect a = cpvmult(cpvforangle(0.0), 1.0);
		cpVect b = a;
		cpVect c = a;
		cpVect v = cpvslerp(a, b, 0.5);
		GHAssertLessThan(cpvdist(v, c), (cpFloat)1e-5, nil);
	}
	
	// TODO should it handle this?
//	{
//		cpVect a = cpv( 1.0, 0.01);
//		cpVect b = cpv(-1.0, 0.0);
//		cpVect v = cpvslerp(a, b, 0.5);
//		GHAssertLessThan(cpvdot(a, v), (cpFloat)1e-5, nil);
//		GHAssertLessThan(cpvdot(b, v), (cpFloat)1e-5, nil);
//		GHAssertLessThan(cpvlength(v) - 1.0, (cpFloat)1e-5, nil);
//	}
	
	// Slerp const
	{
		cpVect a = cpvmult(cpvforangle(0.0), 1.0);
		cpVect b = cpvmult(cpvforangle(M_PI/2.0), 1.0);
		cpVect c = cpvadd(cpvmult(a, cpfcos(M_PI/4.0)), cpvmult(b, cpfsin(M_PI/4.0)));
		cpVect v = cpvslerpconst(a, b, M_PI/4.0);
		GHAssertLessThan(cpvdist(v, c), (cpFloat)1e-5, nil);
	}
	
	{
		cpVect a = cpvmult(cpvforangle(0.0), 1.0);
		cpVect b = cpvmult(cpvforangle(M_PI/2.0), 1.0);
		cpVect c = b;
		cpVect v = cpvslerpconst(a, b, M_PI/2.0);
		GHAssertLessThan(cpvdist(v, c), (cpFloat)1e-5, nil);
	}
	
	{
		cpVect a = cpvmult(cpvforangle(0.0), 1.0);
		cpVect b = cpvmult(cpvforangle(M_PI/2.0), 1.0);
		cpVect c = b;
		cpVect v = cpvslerpconst(a, b, INFINITY);
		GHAssertLessThan(cpvdist(v, c), (cpFloat)1e-5, nil);
	}
	
	{
		cpVect a = cpvmult(cpvforangle(0.0), 1.0);
		cpVect b = cpvmult(cpvforangle(M_PI/2.0), 1.0);
		cpVect c = a;
		cpVect v = cpvslerpconst(a, b, 0);
		GHAssertLessThan(cpvdist(v, c), (cpFloat)1e-5, nil);
	}