| Description | Hi guys, we're getting an assert when trying to invert a matrix with a zero determinent from seemingly valid inputs when we click a button:
Noesis::Inverse(const Noesis::Matrix4 & m, float determinant) Line 860 C++ Symbols loaded.
Noesis::Inverse(const Noesis::Matrix4 & m) Line 854 C++ Symbols loaded.
Noesis::Visual::PointFromScreen(const Noesis::Point & point) Line 204 C++ Symbols loaded.
Noesis::BaseButton::OnMouseMove(const Noesis::MouseEventArgs & e) Line 359 C++ Symbols loaded.
To get the view projection we're using the default calculated one (i.e. NOT a user projection matrix). My view resolution is 1920 x 1011 (a maximized window on a 1080p monitor, so the actual render target height is only 1011 pixels instead of 1080, so this is not perfectly 16:9 aspect ratio).
t (InternalTransformToRoot()) is the following:
- t {mVal=0x0000000003dce9a8 {{x=0.468055546 y=0.000000000 z=0.000000000 }, {x=0.000000000 y=0.468055546 ...}, ...} } Noesis::Transform3
- mVal 0x0000000003dce9a8 {{x=0.468055546 y=0.000000000 z=0.000000000 }, {x=0.000000000 y=0.468055546 z=0.000000000 }, ...} Noesis::Vector3[4]
- [0] {x=0.468055546 y=0.000000000 z=0.000000000 } Noesis::Vector3
- [1] {x=0.000000000 y=0.468055546 z=0.000000000 } Noesis::Vector3
- [2] {x=0.000000000 y=0.000000000 z=1.00000000 } Noesis::Vector3
- [3] {x=93.6111069 y=210.625000 z=0.000000000 } Noesis::Vector3
Projection Matrix is as follows:
- proj {mVal=0x0000000003dcea20 {{x=1.00000000 y=0.000000000 z=0.000000000 ...}, {x=-0.000000000 y=1.00000000 ...}, ...} } Noesis::Matrix4
- mVal 0x0000000003dcea20 {{x=1.00000000 y=0.000000000 z=0.000000000 ...}, {x=-0.000000000 y=1.00000000 z=-0.000000000 ...}, ...} Noesis::Vector4[4]
- [0] {x=1.00000000 y=0.000000000 z=0.000000000 ...} Noesis::Vector4
x 1.00000000 float
y 0.000000000 float
z 0.000000000 float
w 0.000000000 float
- [1] {x=-0.000000000 y=1.00000000 z=-0.000000000 ...} Noesis::Vector4
x -0.000000000 float
y 1.00000000 float
z -0.000000000 float
w -0.000000000 float
- [2] {x=0.960000038 y=0.505500019 z=0.00100000005 ...} Noesis::Vector4
x 0.960000038 float
y 0.505500019 float
z 0.00100000005 float
w 0.00100000005 float
- [3] {x=0.000000000 y=0.000000000 z=0.999499977 ...} Noesis::Vector4
x 0.000000000 float
y 0.000000000 float
z 0.999499977 float
w 1.00000000 float
mtx (t * proj) is as follows
- mtx {mVal=0x0000000003dcea60 {{x=0.468055546 y=0.000000000 z=0.000000000 ...}, {x=0.000000000 y=0.468055546 ...}, ...} } Noesis::Matrix4
- mVal 0x0000000003dcea60 {{x=0.468055546 y=0.000000000 z=0.000000000 ...}, {x=0.000000000 y=0.468055546 z=...}, ...} Noesis::Vector4[4]
- [0] {x=0.468055546 y=0.000000000 z=0.000000000 ...} Noesis::Vector4
x 0.468055546 float
y 0.000000000 float
z 0.000000000 float
w 0.000000000 float
- [1] {x=0.000000000 y=0.468055546 z=0.000000000 ...} Noesis::Vector4
x 0.000000000 float
y 0.468055546 float
z 0.000000000 float
w 0.000000000 float
- [2] {x=0.960000038 y=0.505500019 z=0.00100000005 ...} Noesis::Vector4
x 0.960000038 float
y 0.505500019 float
z 0.00100000005 float
w 0.00100000005 float
- [3] {x=93.6111069 y=210.625000 z=0.999499977 ...} Noesis::Vector4
x 93.6111069 float
y 210.625000 float
z 0.999499977 float
w 1.00000000 float
These are the properties inside the Determinent method:
- m {mVal=0x0000000003dcea60 {{x=0.468055546 y=0.000000000 z=0.000000000 ...}, {x=0.000000000 y=0.468055546 ...}, ...} } const Noesis::Matrix4 &
- mVal 0x0000000003dcea60 {{x=0.468055546 y=0.000000000 z=0.000000000 ...}, {x=0.000000000 y=0.468055546 z=...}, ...} Noesis::Vector4[4]
- [0] {x=0.468055546 y=0.000000000 z=0.000000000 ...} Noesis::Vector4
x 0.468055546 float
y 0.000000000 float
z 0.000000000 float
w 0.000000000 float
- [1] {x=0.000000000 y=0.468055546 z=0.000000000 ...} Noesis::Vector4
x 0.000000000 float
y 0.468055546 float
z 0.000000000 float
w 0.000000000 float
- [2] {x=0.960000038 y=0.505500019 z=0.00100000005 ...} Noesis::Vector4
x 0.960000038 float
y 0.505500019 float
z 0.00100000005 float
w 0.00100000005 float
- [3] {x=93.6111069 y=210.625000 z=0.999499977 ...} Noesis::Vector4
x 93.6111069 float
y 210.625000 float
z 0.999499977 float
w 1.00000000 float
v0 154.879593 float
v1 0.865908921 float
v2 0.866388917 float
v3 0.294622242 float
v4 0.294875026 float
v5 5.00003807e-07 float
t00 2.34029557e-07 float
t10 -0.000000000 float
t20 -0.405518144 float
t30 0.405293465 float
The v5 is pretty much zero and when multiplied through the matrix's first column it ends up returning zero for each component: |
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| Steps To Reproduce | Use this function to use the same properties as me and then click a button.
Point PointFromScreenTest(/const Point& point/)
{
Point point(302.0f, 401.0f);
//Transform3 t = InternalTransformToRoot();
Transform3 t(
0.468055546f, 0.0f, 0.0f,
0.0f, 0.468055546f, 0.0f,
0.0f, 0.0f, 1.0f,
93.6111069f, 210.625f, 0.0f);
float det = Determinant(t.Rotation());
if (fabsf(det) < FLT_EPSILON)
{
return Point(FLT_INF, FLT_INF);
}
//Matrix4 proj = GetViewProjectionMatrix(mView);
Matrix4 proj(
1.0f, 0.0f, 0.0f, 0.0f,
0.0f, 1.0f, 0.0f, 0.0f,
0.96f, 0.5055f, 0.001f, 0.001f,
0.0f, 0.0f, 1.0f, 1.0f
);
Matrix4 mtx = t * proj;
Matrix4 invMtx = Inverse(mtx);
Vector4 dir = Vector4(point, 1.0f, 1.0f) * invMtx;
Vector4 p = Vector4(0.0f, 0.0f, 0.0f, 1.0f) * invMtx;
p /= p.w;
return IntersectPlane(p, dir, Matrix4::Identity()).first;
} |
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