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calculate the actual bounding box for the mesh parts

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This commit is contained in:
ZappoMan 2015-06-01 13:31:42 -07:00
parent 750d9c0616
commit 1e2d2a2a99
2 changed files with 34 additions and 2 deletions
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34
libraries/render-utils/src/Model.cpp
View file

@ -81,6 +81,7 @@ Model::Model(QObject* parent) :
_url("http://invalid.com"),
_blendNumber(0),
_appliedBlendNumber(0),
_calculatedMeshPartBoxesValid(false),
_calculatedMeshBoxesValid(false),
_calculatedMeshTrianglesValid(false),
_meshGroupsKnown(false),
@ -666,12 +667,13 @@ bool Model::convexHullContains(glm::vec3 point) {
void Model::recalculateMeshBoxes(bool pickAgainstTriangles) {
bool calculatedMeshTrianglesNeeded = pickAgainstTriangles && !_calculatedMeshTrianglesValid;
if (!_calculatedMeshBoxesValid || calculatedMeshTrianglesNeeded) {
if (!_calculatedMeshBoxesValid || calculatedMeshTrianglesNeeded || (!_calculatedMeshPartBoxesValid && pickAgainstTriangles) ) {
const FBXGeometry& geometry = _geometry->getFBXGeometry();
int numberOfMeshes = geometry.meshes.size();
_calculatedMeshBoxes.resize(numberOfMeshes);
_calculatedMeshTriangles.clear();
_calculatedMeshTriangles.resize(numberOfMeshes);
_calculatedMeshPartBoxes.clear();
for (int i = 0; i < numberOfMeshes; i++) {
const FBXMesh& mesh = geometry.meshes.at(i);
Extents scaledMeshExtents = calculateScaledOffsetExtents(mesh.meshExtents);
@ -682,6 +684,9 @@ void Model::recalculateMeshBoxes(bool pickAgainstTriangles) {
QVector<Triangle> thisMeshTriangles;
for (int j = 0; j < mesh.parts.size(); j++) {
const FBXMeshPart& part = mesh.parts.at(j);
bool atLeastOnePointInBounds = false;
AABox thisPartBounds;
const int INDICES_PER_TRIANGLE = 3;
const int INDICES_PER_QUAD = 4;
@ -710,6 +715,15 @@ void Model::recalculateMeshBoxes(bool pickAgainstTriangles) {
thisMeshTriangles.push_back(tri1);
thisMeshTriangles.push_back(tri2);
if (!atLeastOnePointInBounds) {
thisPartBounds.setBox(v0, 0.0f);
atLeastOnePointInBounds = true;
}
thisPartBounds += v0;
thisPartBounds += v1;
thisPartBounds += v2;
thisPartBounds += v3;
}
}
@ -728,10 +742,20 @@ void Model::recalculateMeshBoxes(bool pickAgainstTriangles) {
Triangle tri = { v0, v1, v2 };
thisMeshTriangles.push_back(tri);
if (!atLeastOnePointInBounds) {
thisPartBounds.setBox(v0, 0.0f);
atLeastOnePointInBounds = true;
}
thisPartBounds += v0;
thisPartBounds += v1;
thisPartBounds += v2;
}
}
_calculatedMeshPartBoxes[QPair<int,int>(i, j)] = thisPartBounds;
}
_calculatedMeshTriangles[i] = thisMeshTriangles;
_calculatedMeshPartBoxesValid = true;
}
}
_calculatedMeshBoxesValid = true;
@ -2176,7 +2200,13 @@ bool Model::renderInScene(float alpha, RenderArgs* args) {
}
AABox Model::getPartBounds(int meshIndex, int partIndex) {
if (_calculatedMeshBoxesValid) {
if (!_calculatedMeshPartBoxesValid) {
recalculateMeshBoxes(true);
}
if (_calculatedMeshPartBoxesValid && _calculatedMeshPartBoxes.contains(QPair<int,int>(meshIndex, partIndex))) {
return _calculatedMeshPartBoxes[QPair<int,int>(meshIndex, partIndex)];
}
if (!_calculatedMeshBoxesValid) {
return _calculatedMeshBoxes[meshIndex];
}
return AABox();

2
libraries/render-utils/src/Model.h
View file

@ -368,6 +368,8 @@ private:
int clusterWeights;
};
QHash<QPair<int,int>, AABox> _calculatedMeshPartBoxes; // world coordinate AABoxes for all sub mesh part boxes
bool _calculatedMeshPartBoxesValid;
QVector<AABox> _calculatedMeshBoxes; // world coordinate AABoxes for all sub mesh boxes
bool _calculatedMeshBoxesValid;