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Merge pull request #2072 from jrimclean/master

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Interpolation for affine transformations/Bound rot/pos Matrix32 constructor
This commit is contained in:
Juan Linietsky 2015-06-22 23:57:10 -03:00
commit 3abb54871f
2 changed files with 39 additions and 2 deletions
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34
core/math/math_2d.cpp
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@ -622,9 +622,39 @@ float Matrix32::basis_determinant() const {
}
Matrix32 Matrix32::interpolate_with(const Matrix32& p_transform, float p_c) const {
//extract parameters
Vector2 p1 = get_origin();
Vector2 p2 = p_transform.get_origin();
real_t r1 = get_rotation();
real_t r2 = p_transform.get_rotation();
Vector2 s1 = get_scale();
Vector2 s2 = p_transform.get_scale();
//slerp rotation
Vector2 v1(Math::cos(r1), Math::sin(r1));
Vector2 v2(Math::cos(r2), Math::sin(r2));
real_t dot = v1.dot(v2);
dot = (dot < -1.0) ? -1.0 : ((dot > 1.0) ? 1.0 : dot); //clamp dot to [-1,1]
Vector2 v;
return Matrix32();
if (dot > 0.9995) {
v = Vector2::linear_interpolate(v1, v2, p_c).normalized(); //linearly interpolate to avoid numerical precision issues
} else {
real_t angle = p_c*Math::acos(dot);
Vector2 v3 = (v2 - v1*dot).normalized();
v = v1*Math::cos(angle) + v3*Math::sin(angle);
}
//construct matrix
Matrix32 res(Math::atan2(v.y, v.x), Vector2::linear_interpolate(p1, p2, p_c));
res.scale_basis(Vector2::linear_interpolate(s1, s2, p_c));
return res;
}
Matrix32::operator String() const {

7
core/variant_call.cpp
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@ -750,6 +750,12 @@ static void _call_##m_type##_##m_method(Variant& r_ret,Variant& p_self,const Var
r_ret=Rect2(*p_args[0],*p_args[1],*p_args[2],*p_args[3]);
}
static void Matrix32_init2(Variant& r_ret,const Variant** p_args) {
Matrix32 m(*p_args[0], *p_args[1]);
r_ret=m;
}
static void Matrix32_init3(Variant& r_ret,const Variant** p_args) {
Matrix32 m;
@ -1544,6 +1550,7 @@ _VariantCall::addfunc(Variant::m_vtype,Variant::m_ret,_SCS(#m_method),VCALL(m_cl
_VariantCall::add_constructor(_VariantCall::Rect2_init1,Variant::RECT2,"pos",Variant::VECTOR2,"size",Variant::VECTOR2);
_VariantCall::add_constructor(_VariantCall::Rect2_init2,Variant::RECT2,"x",Variant::REAL,"y",Variant::REAL,"width",Variant::REAL,"height",Variant::REAL);
_VariantCall::add_constructor(_VariantCall::Matrix32_init2,Variant::MATRIX32,"rot",Variant::REAL,"pos",Variant::VECTOR2);
_VariantCall::add_constructor(_VariantCall::Matrix32_init3,Variant::MATRIX32,"x_axis",Variant::VECTOR2,"y_axis",Variant::VECTOR2,"origin",Variant::VECTOR2);
_VariantCall::add_constructor(_VariantCall::Vector3_init1,Variant::VECTOR3,"x",Variant::REAL,"y",Variant::REAL,"z",Variant::REAL);