本文整理汇总了C++中LLVector4a::div方法的典型用法代码示例。如果您正苦于以下问题：C++ LLVector4a::div方法的具体用法？C++ LLVector4a::div怎么用？C++ LLVector4a::div使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类LLVector4a的用法示例。
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示例1: normalizeVolumeFaces
// Shrink the model to fit
// on a 1x1x1 cube centered at the origin.
// The positions and extents
// multiplied by mNormalizedScale
// and offset by mNormalizedTranslation
// to be the "original" extents and position.
// Also, the positions will fit
// within the unit cube.
void LLModel::normalizeVolumeFaces()
{
// ensure we don't have too many faces
if (mVolumeFaces.size() > LL_SCULPT_MESH_MAX_FACES)
mVolumeFaces.resize(LL_SCULPT_MESH_MAX_FACES);
if (!mVolumeFaces.empty())
{
LLVector4a min, max;
// For all of the volume faces
// in the model, loop over
// them and see what the extents
// of the volume along each axis.
min = mVolumeFaces[0].mExtents[0];
max = mVolumeFaces[0].mExtents[1];
for (U32 i = 1; i < mVolumeFaces.size(); ++i)
{
LLVolumeFace& face = mVolumeFaces[i];
update_min_max(min, max, face.mExtents[0]);
update_min_max(min, max, face.mExtents[1]);
if (face.mTexCoords)
{
LLVector2& min_tc = face.mTexCoordExtents[0];
LLVector2& max_tc = face.mTexCoordExtents[1];
min_tc = face.mTexCoords[0];
max_tc = face.mTexCoords[0];
for (U32 j = 1; j < (U32)face.mNumVertices; ++j)
{
update_min_max(min_tc, max_tc, face.mTexCoords[j]);
}
}
else
{
face.mTexCoordExtents[0].set(0,0);
face.mTexCoordExtents[1].set(1,1);
}
}
// Now that we have the extents of the model
// we can compute the offset needed to center
// the model at the origin.
// Compute center of the model
// and make it negative to get translation
// needed to center at origin.
LLVector4a trans;
trans.setAdd(min, max);
trans.mul(-0.5f);
// Compute the total size along all
// axes of the model.
LLVector4a size;
size.setSub(max, min);
// Prevent division by zero.
F32 x = size[0];
F32 y = size[1];
F32 z = size[2];
F32 w = size[3];
if (fabs(x)<F_APPROXIMATELY_ZERO)
{
x = 1.0;
}
if (fabs(y)<F_APPROXIMATELY_ZERO)
{
y = 1.0;
}
if (fabs(z)<F_APPROXIMATELY_ZERO)
{
z = 1.0;
}
size.set(x,y,z,w);
// Compute scale as reciprocal of size
LLVector4a scale;
scale.splat(1.f);
scale.div(size);
LLVector4a inv_scale(1.f);
inv_scale.div(scale);
for (U32 i = 0; i < mVolumeFaces.size(); ++i)
{
LLVolumeFace& face = mVolumeFaces[i];
//.........这里部分代码省略.........