Frustum CoordinateFrame::toWorldSpace(const Frustum& f) const {
Frustum g;
g.vertexPos.resize(f.vertexPos.size());
g.faceArray.resize(f.faceArray.size());
for (int i = 0; i < f.vertexPos.size(); ++i) {
g.vertexPos[i] = toWorldSpace(f.vertexPos[i]);
}
for (int i = 0; i < f.faceArray.size(); ++i) {
g.faceArray[i].plane = toWorldSpace(f.faceArray[i].plane);
for (int j = 0; j < 4; ++j) {
g.faceArray[i].vertexIndex[j] = f.faceArray[i].vertexIndex[j];
}
}
return g;
}
void CoordinateFrame::toWorldSpace(const AABox& b, AABox& result) const {
if (b.isEmpty()) {
result = b;
} else if (! b.isFinite()) {
// We can't combine infinite elements under a matrix
// multiplication: if the computation performs inf-inf we'll
// get NaN. So treat the box as infinite in all directions.
result = AABox::inf();
} else {
toWorldSpace(Box(b)).getBounds(result);
}
}
Box CoordinateFrame::toWorldSpace(const AABox& b) const {
Box b2(b);
return toWorldSpace(b2);
}
frustum::frustum(const glm::mat4& projectionMatrix, const glm::mat4& viewMatrix) :
sidesWorld()
{
toWorldSpace(projectionMatrix, viewMatrix);
}
Box CoordinateFrame::toWorldSpace(const AABox& b) const {
return toWorldSpace(Box(b));
}
