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fix collision mesh for non-trivial registration

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This commit is contained in:
Andrew Meadows 2016-08-24 17:51:33 -07:00
parent 502146b171
commit b95cb566cd
3 changed files with 27 additions and 18 deletions
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34
libraries/entities-renderer/src/RenderableModelEntityItem.cpp
View file

@ -631,7 +631,7 @@ bool RenderableModelEntityItem::isReadyToComputeShape() {
return true;
}
void RenderableModelEntityItem::computeShapeInfo(ShapeInfo& info) {
void RenderableModelEntityItem::computeShapeInfo(ShapeInfo& shapeInfo) {
const uint32_t TRIANGLE_STRIDE = 3;
const uint32_t QUAD_STRIDE = 4;
@ -645,7 +645,7 @@ void RenderableModelEntityItem::computeShapeInfo(ShapeInfo& info) {
assert(_model && _model->isLoaded() && _compoundShapeResource && _compoundShapeResource->isLoaded());
const FBXGeometry& collisionGeometry = _compoundShapeResource->getFBXGeometry();
ShapeInfo::PointCollection& pointCollection = info.getPointCollection();
ShapeInfo::PointCollection& pointCollection = shapeInfo.getPointCollection();
pointCollection.clear();
uint32_t i = 0;
@ -721,15 +721,14 @@ void RenderableModelEntityItem::computeShapeInfo(ShapeInfo& info) {
glm::vec3 scaleToFit = dimensions / _model->getFBXGeometry().getUnscaledMeshExtents().size();
// multiply each point by scale before handing the point-set off to the physics engine.
// also determine the extents of the collision model.
glm::vec3 registrationOffset = dimensions * (ENTITY_ITEM_DEFAULT_REGISTRATION_POINT - getRegistrationPoint());
for (int32_t i = 0; i < pointCollection.size(); i++) {
for (int32_t j = 0; j < pointCollection[i].size(); j++) {
// compensate for registration
pointCollection[i][j] += _model->getOffset();
// scale so the collision points match the model points
pointCollection[i][j] *= scaleToFit;
// back compensate for registration so we can apply that offset to the shapeInfo later
pointCollection[i][j] = scaleToFit * (pointCollection[i][j] + _model->getOffset()) - registrationOffset;
}
}
info.setParams(type, dimensions, _compoundShapeURL);
shapeInfo.setParams(type, dimensions, _compoundShapeURL);
} else if (type >= SHAPE_TYPE_SIMPLE_HULL && type <= SHAPE_TYPE_STATIC_MESH) {
// should never fall in here when model not fully loaded
assert(_model && _model->isLoaded());
@ -742,29 +741,31 @@ void RenderableModelEntityItem::computeShapeInfo(ShapeInfo& info) {
const FBXGeometry& fbxGeometry = _model->getFBXGeometry();
int numFbxMeshes = fbxGeometry.meshes.size();
int totalNumVertices = 0;
glm::mat4 invRegistraionOffset = glm::translate(dimensions * (getRegistrationPoint() - ENTITY_ITEM_DEFAULT_REGISTRATION_POINT));
for (int i = 0; i < numFbxMeshes; i++) {
const FBXMesh& mesh = fbxGeometry.meshes.at(i);
if (mesh.clusters.size() > 0) {
const FBXCluster& cluster = mesh.clusters.at(0);
auto jointMatrix = _model->getRig()->getJointTransform(cluster.jointIndex);
localTransforms.push_back(jointMatrix * cluster.inverseBindMatrix);
// we backtranslate by the registration offset so we can apply that offset to the shapeInfo later
localTransforms.push_back(invRegistraionOffset * jointMatrix * cluster.inverseBindMatrix);
} else {
glm::mat4 identity;
localTransforms.push_back(identity);
localTransforms.push_back(invRegistraionOffset);
}
totalNumVertices += mesh.vertices.size();
}
const int32_t MAX_VERTICES_PER_STATIC_MESH = 1e6;
if (totalNumVertices > MAX_VERTICES_PER_STATIC_MESH) {
qWarning() << "model" << getModelURL() << "has too many vertices" << totalNumVertices << "and will collide as a box.";
info.setParams(SHAPE_TYPE_BOX, 0.5f * dimensions);
shapeInfo.setParams(SHAPE_TYPE_BOX, 0.5f * dimensions);
return;
}
auto& meshes = _model->getGeometry()->getMeshes();
int32_t numMeshes = (int32_t)(meshes.size());
ShapeInfo::PointCollection& pointCollection = info.getPointCollection();
ShapeInfo::PointCollection& pointCollection = shapeInfo.getPointCollection();
pointCollection.clear();
if (type == SHAPE_TYPE_SIMPLE_COMPOUND) {
pointCollection.resize(numMeshes);
@ -772,7 +773,7 @@ void RenderableModelEntityItem::computeShapeInfo(ShapeInfo& info) {
pointCollection.resize(1);
}
ShapeInfo::TriangleIndices& triangleIndices = info.getTriangleIndices();
ShapeInfo::TriangleIndices& triangleIndices = shapeInfo.getTriangleIndices();
triangleIndices.clear();
Extents extents;
@ -946,12 +947,13 @@ void RenderableModelEntityItem::computeShapeInfo(ShapeInfo& info) {
}
}
info.setParams(type, 0.5f * dimensions, _modelURL);
shapeInfo.setParams(type, 0.5f * dimensions, _modelURL);
} else {
ModelEntityItem::computeShapeInfo(info);
info.setParams(type, 0.5f * dimensions);
adjustShapeInfoByRegistration(info);
ModelEntityItem::computeShapeInfo(shapeInfo);
shapeInfo.setParams(type, 0.5f * dimensions);
}
// finally apply the registration offset to the shapeInfo
adjustShapeInfoByRegistration(shapeInfo);
}
void RenderableModelEntityItem::setCollisionShape(const btCollisionShape* shape) {

2
libraries/entities-renderer/src/RenderableModelEntityItem.h
View file

@ -60,7 +60,7 @@ public:
virtual void setCompoundShapeURL(const QString& url) override;
virtual bool isReadyToComputeShape() override;
virtual void computeShapeInfo(ShapeInfo& info) override;
virtual void computeShapeInfo(ShapeInfo& shapeInfo) override;
void setCollisionShape(const btCollisionShape* shape) override;

9
libraries/render-utils/src/Model.cpp
View file

@ -1284,6 +1284,11 @@ void Model::createCollisionRenderItemSet() {
// We should not have any existing renderItems if we enter this section of code
Q_ASSERT(_collisionRenderItemsSet.isEmpty());
Transform identity;
identity.setIdentity();
Transform offset;
offset.postTranslate(_offset);
// Run through all of the meshes, and place them into their segregated, but unsorted buckets
uint32_t numMeshes = (uint32_t)meshes.size();
for (uint32_t i = 0; i < numMeshes; i++) {
@ -1296,7 +1301,9 @@ void Model::createCollisionRenderItemSet() {
int numParts = (int)mesh->getNumParts();
for (int partIndex = 0; partIndex < numParts; partIndex++) {
model::MaterialPointer& material = _collisionMaterials[partIndex % NUM_COLLISION_HULL_COLORS];
_collisionRenderItemsSet << std::make_shared<MeshPartPayload>(mesh, partIndex, material);
auto payload = std::make_shared<MeshPartPayload>(mesh, partIndex, material);
payload->updateTransform(identity, offset);
_collisionRenderItemsSet << payload;
}
}
}