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Enables setting the forward vector of a Scene Object

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This commit is contained in:
Areloch 2017-10-15 03:49:18 -05:00
parent efbd5fb451
commit 4bcc97379c
2 changed files with 68 additions and 0 deletions
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65
Engine/source/scene/sceneObject.cpp
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@ -433,6 +433,64 @@ void SceneObject::setScale( const VectorF &scale )
setMaskBits( ScaleMask );
}
void SceneObject::setForwardVector(VectorF newForward, VectorF upVector)
{
MatrixF mat = getTransform();
VectorF up(0.0f, 0.0f, 1.0f);
VectorF axisX;
VectorF axisY = newForward;
VectorF axisZ;
if (upVector != VectorF::Zero)
up = upVector;
// Validate and normalize input:
F32 lenSq;
lenSq = axisY.lenSquared();
if (lenSq < 0.000001f)
{
axisY.set(0.0f, 1.0f, 0.0f);
Con::errorf("SceneObject::setForwardVector() - degenerate forward vector");
}
else
{
axisY /= mSqrt(lenSq);
}
lenSq = up.lenSquared();
if (lenSq < 0.000001f)
{
up.set(0.0f, 0.0f, 1.0f);
Con::errorf("SceneObject::setForwardVector() - degenerate up vector - too small");
}
else
{
up /= mSqrt(lenSq);
}
if (fabsf(mDot(up, axisY)) > 0.9999f)
{
Con::errorf("SceneObject::setForwardVector() - degenerate up vector - same as forward");
// I haven't really tested this, but i think it generates something which should be not parallel to the previous vector:
F32 tmp = up.x;
up.x = -up.y;
up.y = up.z;
up.z = tmp;
}
// construct the remaining axes:
mCross(axisY, up, &axisX);
mCross(axisX, axisY, &axisZ);
mat.setColumn(0, axisX);
mat.setColumn(1, axisY);
mat.setColumn(2, axisZ);
setTransform(mat);
}
//-----------------------------------------------------------------------------
void SceneObject::resetWorldBox()
@ -1458,3 +1516,10 @@ DefineEngineMethod( SceneObject, isGlobalBounds, bool, (),,
{
return object->isGlobalBounds();
}
DefineConsoleMethod(SceneObject, setForwardVector, void, (VectorF newForward, VectorF upVector), (VectorF(0, 0, 0), VectorF(0, 0, 1)),
"Get the number of static fields on the object.\n"
"@return The number of static fields defined on the object.")
{
object->setForwardVector(newForward, upVector);
}