Render a different model when in first person view.

Currently this model is identical to the third person model, except
that the head bones have been 'cauterized' by applying a zero scale transform.
This allows us to set the near clip back to a reasonable value.

interface/src/Application.cpp

@@ -3306,6 +3306,9 @@ namespace render {
 
 
 void Application::displaySide(RenderArgs* renderArgs, Camera& theCamera, bool selfAvatarOnly, bool billboard) {
+
+    _myAvatar->preRender(renderArgs);
+
     activeRenderingThread = QThread::currentThread();
     PROFILE_RANGE(__FUNCTION__);
     PerformanceTimer perfTimer("display");

interface/src/avatar/Avatar.cpp

@@ -445,10 +445,10 @@ void Avatar::render(RenderArgs* renderArgs, const glm::vec3& cameraPosition, boo
                 _skeletonModel.renderJointCollisionShapes(0.7f);
             }
 
-            if (renderHead && shouldRenderHead(renderArgs, cameraPosition)) {
+            if (renderHead && shouldRenderHead(renderArgs)) {
                 getHead()->getFaceModel().renderJointCollisionShapes(0.7f);
             }
-            if (renderBounding && shouldRenderHead(renderArgs, cameraPosition)) {
+            if (renderBounding && shouldRenderHead(renderArgs)) {
                 _skeletonModel.renderBoundingCollisionShapes(0.7f);
             }
 
@@ -533,6 +533,7 @@ glm::quat Avatar::computeRotationFromBodyToWorldUp(float proportion) const {
 }
 
 void Avatar::fixupModelsInScene() {
+
     // check to see if when we added our models to the scene they were ready, if they were not ready, then
     // fix them up in the scene
     render::ScenePointer scene = Application::getInstance()->getMain3DScene();
@@ -581,7 +582,7 @@ void Avatar::renderBody(RenderArgs* renderArgs, ViewFrustum* renderFrustum, bool
     getHead()->render(renderArgs, 1.0f, renderFrustum, postLighting);
 }
 
-bool Avatar::shouldRenderHead(const RenderArgs* renderArgs, const glm::vec3& cameraPosition) const {
+bool Avatar::shouldRenderHead(const RenderArgs* renderArgs) const {
     return true;
 }
 

interface/src/avatar/Avatar.h

@@ -237,7 +237,7 @@ protected:
     Transform calculateDisplayNameTransform(const ViewFrustum& frustum, float fontSize) const;
     void renderDisplayName(gpu::Batch& batch, const ViewFrustum& frustum) const;
     virtual void renderBody(RenderArgs* renderArgs, ViewFrustum* renderFrustum, bool postLighting, float glowLevel = 0.0f);
-    virtual bool shouldRenderHead(const RenderArgs* renderArgs, const glm::vec3& cameraPosition) const;
+    virtual bool shouldRenderHead(const RenderArgs* renderArgs) const;
     virtual void fixupModelsInScene();
 
     void simulateAttachments(float deltaTime);

interface/src/avatar/MyAvatar.cpp

@@ -27,6 +27,7 @@
 #include <GeometryUtil.h>
 #include <NodeList.h>
 #include <PacketHeaders.h>
+#include <PathUtils.h>
 #include <PerfStat.h>
 #include <ShapeCollider.h>
 #include <SharedUtil.h>
@@ -96,8 +97,12 @@ MyAvatar::MyAvatar() :
     _feetTouchFloor(true),
     _isLookingAtLeftEye(true),
     _realWorldFieldOfView("realWorldFieldOfView",
-                          DEFAULT_REAL_WORLD_FIELD_OF_VIEW_DEGREES)
+                          DEFAULT_REAL_WORLD_FIELD_OF_VIEW_DEGREES),
+    _currentSkeletonModel(nullptr),
+    _firstPersonSkeletonModel(this)
 {
+    _firstPersonSkeletonModel.setIsFirstPerson(true);
+
     ShapeCollider::initDispatchTable();
     for (int i = 0; i < MAX_DRIVE_KEYS; i++) {
         _driveKeys[i] = 0.0f;
@@ -131,6 +136,7 @@ QByteArray MyAvatar::toByteArray() {
 
 void MyAvatar::reset() {
     _skeletonModel.reset();
+    _firstPersonSkeletonModel.reset();
     getHead()->reset();
 
     _targetVelocity = glm::vec3(0.0f);
@@ -189,6 +195,7 @@ void MyAvatar::simulate(float deltaTime) {
     {
         PerformanceTimer perfTimer("skeleton");
         _skeletonModel.simulate(deltaTime);
+        _firstPersonSkeletonModel.simulate(deltaTime);
     }
 
     if (!_skeletonModel.hasSkeleton()) {
@@ -993,6 +1000,11 @@ void MyAvatar::setFaceModelURL(const QUrl& faceModelURL) {
 void MyAvatar::setSkeletonModelURL(const QUrl& skeletonModelURL) {
     Avatar::setSkeletonModelURL(skeletonModelURL);
     _billboardValid = false;
+
+    if (_useFullAvatar) {
+        const QUrl DEFAULT_SKELETON_MODEL_URL = QUrl::fromLocalFile(PathUtils::resourcesPath() + "meshes/defaultAvatar_body.fst");
+        _firstPersonSkeletonModel.setURL(_skeletonModelURL, DEFAULT_SKELETON_MODEL_URL, true, !isMyAvatar());
+    }
 }
 
 void MyAvatar::useFullAvatarURL(const QUrl& fullAvatarURL, const QString& modelName) {
@@ -1176,18 +1188,12 @@ void MyAvatar::attach(const QString& modelURL, const QString& jointName, const g
 
 void MyAvatar::renderBody(RenderArgs* renderArgs, ViewFrustum* renderFrustum, bool postLighting, float glowLevel) {
 
-    if (!(_skeletonModel.isRenderable() && getHead()->getFaceModel().isRenderable())) {
+    if (!(_skeletonModel.isRenderable() && _firstPersonSkeletonModel.isRenderable() && getHead()->getFaceModel().isRenderable())) {
-        return; // wait until both models are loaded
+        return; // wait until all models are loaded
     }
 
-    // check to see if when we added our models to the scene they were ready, if they were not ready, then
-    // fix them up in the scene
-    fixupModelsInScene();
-
-    const glm::vec3 cameraPos = Application::getInstance()->getCamera()->getPosition();
-
     //  Render head so long as the camera isn't inside it
-    if (shouldRenderHead(renderArgs, cameraPos)) {
+    if (shouldRenderHead(renderArgs)) {
         getHead()->render(renderArgs, 1.0f, renderFrustum, postLighting);
     }
     if (postLighting) {
@@ -1195,12 +1201,42 @@ void MyAvatar::renderBody(RenderArgs* renderArgs, ViewFrustum* renderFrustum, bo
     }
 }
 
+void MyAvatar::setCurrentSkeletonModel(SkeletonModel* skeletonModel) {
+    if (_currentSkeletonModel != skeletonModel && skeletonModel->isActive() && skeletonModel->isRenderable()) {
+
+        render::ScenePointer scene = Application::getInstance()->getMain3DScene();
+
+        if (_currentSkeletonModel) {
+            _currentSkeletonModel->setVisibleInScene(false, scene);
+        }
+        skeletonModel->setVisibleInScene(true, scene);
+        _currentSkeletonModel = skeletonModel;
+    }
+}
+
+void MyAvatar::preRender(RenderArgs* renderArgs) {
+
+    render::ScenePointer scene = Application::getInstance()->getMain3DScene();
+
+    _skeletonModel.initWhenReady(scene);
+    _firstPersonSkeletonModel.initWhenReady(scene);
+
+    // set visiblity on each model
+    if (shouldRenderHead(renderArgs)) {
+        setCurrentSkeletonModel(&_skeletonModel);
+    } else {
+        setCurrentSkeletonModel(&_firstPersonSkeletonModel);
+    }
+}
+
 const float RENDER_HEAD_CUTOFF_DISTANCE = 0.50f;
 
-bool MyAvatar::shouldRenderHead(const RenderArgs* renderArgs, const glm::vec3& cameraPosition) const {
+bool MyAvatar::shouldRenderHead(const RenderArgs* renderArgs) const {
+    const glm::vec3 cameraPos = Application::getInstance()->getCamera()->getPosition();
     const Head* head = getHead();
-    return (renderArgs->_renderMode != RenderArgs::NORMAL_RENDER_MODE) || (Application::getInstance()->getCamera()->getMode() != CAMERA_MODE_FIRST_PERSON) ||
+    return ((renderArgs->_renderMode != RenderArgs::DEFAULT_RENDER_MODE) ||
-        (glm::length(cameraPosition - head->getEyePosition()) > RENDER_HEAD_CUTOFF_DISTANCE * _scale);
+            (Application::getInstance()->getCamera()->getMode() != CAMERA_MODE_FIRST_PERSON) ||
+            (glm::length(cameraPos - head->getEyePosition()) > RENDER_HEAD_CUTOFF_DISTANCE * _scale));
 }
 
 void MyAvatar::updateOrientation(float deltaTime) {

interface/src/avatar/MyAvatar.h

@@ -35,11 +35,12 @@ public:
     void reset();
     void update(float deltaTime);
     void simulate(float deltaTime);
+    void preRender(RenderArgs* renderArgs);
     void updateFromTrackers(float deltaTime);
 
     virtual void render(RenderArgs* renderArgs, const glm::vec3& cameraPosition, bool postLighting = false) override;
     virtual void renderBody(RenderArgs* renderArgs, ViewFrustum* renderFrustum, bool postLighting, float glowLevel = 0.0f) override;
-    virtual bool shouldRenderHead(const RenderArgs* renderArgs, const glm::vec3& cameraPosition) const override;
+    virtual bool shouldRenderHead(const RenderArgs* renderArgs) const override;
     void renderDebugBodyPoints();
 
     // setters
@@ -210,6 +211,9 @@ private:
     virtual void setFaceModelURL(const QUrl& faceModelURL);
     virtual void setSkeletonModelURL(const QUrl& skeletonModelURL);
 
+    void setCurrentSkeletonModel(SkeletonModel* skeletonModel);
+    void initModelWhenReady(Model* model);
+
     glm::vec3 _gravity;
 
     float _driveKeys[MAX_DRIVE_KEYS];
@@ -265,6 +269,10 @@ private:
     QString _headModelName;
     QString _bodyModelName;
     QString _fullAvatarModelName;
+
+    // used for rendering when in first person view or when in an HMD.
+    SkeletonModel* _currentSkeletonModel;
+    SkeletonModel _firstPersonSkeletonModel;
 };
 
 #endif // hifi_MyAvatar_h

interface/src/avatar/SkeletonModel.cpp

@@ -21,6 +21,7 @@
 #include "Menu.h"
 #include "SkeletonModel.h"
 #include "Util.h"
+#include "InterfaceLogging.h"
 
 enum StandingFootState {
     LEFT_FOOT,
@@ -38,7 +39,8 @@ SkeletonModel::SkeletonModel(Avatar* owningAvatar, QObject* parent) :
     _standingFoot(NO_FOOT),
     _standingOffset(0.0f),
     _clampedFootPosition(0.0f),
-    _headClipDistance(DEFAULT_NEAR_CLIP)
+    _headClipDistance(DEFAULT_NEAR_CLIP),
+    _isFirstPerson(false)
 {
     assert(_owningAvatar);
     _enableShapes = true;
@@ -98,7 +100,7 @@ void SkeletonModel::simulate(float deltaTime, bool fullUpdate) {
     setRotation(_owningAvatar->getOrientation() * refOrientation);
     setScale(glm::vec3(1.0f, 1.0f, 1.0f) * _owningAvatar->getScale());
     setBlendshapeCoefficients(_owningAvatar->getHead()->getBlendshapeCoefficients());
-    
+
     Model::simulate(deltaTime, fullUpdate);
     
     if (!isActive() || !_owningAvatar->isMyAvatar()) {
@@ -140,6 +142,11 @@ void SkeletonModel::simulate(float deltaTime, bool fullUpdate) {
         applyPalmData(geometry.rightHandJointIndex, hand->getPalms()[rightPalmIndex]);
     }
 
+    if (_isFirstPerson) {
+        cauterizeHead();
+        updateClusterMatrices();
+    }
+
     _boundingShape.setTranslation(_translation + _rotation * _boundingShapeLocalOffset);
     _boundingShape.setRotation(_rotation);
 }
@@ -806,3 +813,57 @@ void SkeletonModel::renderBoundingCollisionShapes(float alpha) {
 bool SkeletonModel::hasSkeleton() {
     return isActive() ? _geometry->getFBXGeometry().rootJointIndex != -1 : false;
 }
+
+void SkeletonModel::initHeadBones() {
+    _headBones.clear();
+    const FBXGeometry& fbxGeometry = _geometry->getFBXGeometry();
+    const int neckJointIndex = fbxGeometry.neckJointIndex;
+    std::queue<int> q;
+    q.push(neckJointIndex);
+    _headBones.push_back(neckJointIndex);
+
+    // fbxJoints only hold links to parents not children, so we have to do a bit of extra work here.
+    while (q.size() > 0) {
+        int jointIndex = q.front();
+        for (int i = 0; i < fbxGeometry.joints.size(); i++) {
+            const FBXJoint& fbxJoint = fbxGeometry.joints[i];
+            if (jointIndex == fbxJoint.parentIndex) {
+                _headBones.push_back(i);
+                q.push(i);
+            }
+        }
+        q.pop();
+    }
+}
+
+void SkeletonModel::invalidateHeadBones() {
+    _headBones.clear();
+}
+
+void SkeletonModel::cauterizeHead() {
+    if (isActive()) {
+        const FBXGeometry& geometry = _geometry->getFBXGeometry();
+        const int neckJointIndex = geometry.neckJointIndex;
+        if (neckJointIndex > 0 && neckJointIndex < _jointStates.size()) {
+
+            // lazy init of headBones
+            if (_headBones.size() == 0) {
+                initHeadBones();
+            }
+
+            // preserve the translation for the neck
+            glm::vec4 trans = _jointStates[neckJointIndex].getTransform()[3];
+            glm::vec4 zero(0, 0, 0, 0);
+            for (const int &i : _headBones) {
+                JointState& joint = _jointStates[i];
+                glm::mat4 newXform(zero, zero, zero, trans);
+                joint.setTransform(newXform);
+                joint.setVisibleTransform(newXform);
+            }
+        }
+    }
+}
+
+void SkeletonModel::onInvalidate() {
+    invalidateHeadBones();
+}

interface/src/avatar/SkeletonModel.h

@@ -112,6 +112,11 @@ public:
 
     float getHeadClipDistance() const { return _headClipDistance; }
 
+    void setIsFirstPerson(bool value) { _isFirstPerson = value; }
+    bool getIsFirstPerson() const { return _isFirstPerson; }
+
+    virtual void onInvalidate() override;
+
 signals:
 
     void skeletonLoaded();
@@ -132,7 +137,11 @@ protected:
     void maybeUpdateLeanRotation(const JointState& parentState, JointState& state);
     void maybeUpdateNeckRotation(const JointState& parentState, const FBXJoint& joint, JointState& state);
     void maybeUpdateEyeRotation(const JointState& parentState, const FBXJoint& joint, JointState& state);
-    
+
+    void cauterizeHead();
+    void initHeadBones();
+    void invalidateHeadBones();
+
 private:
 
     void renderJointConstraints(int jointIndex);
@@ -164,6 +173,9 @@ private:
     glm::vec3 _clampedFootPosition;
 
     float _headClipDistance;  // Near clip distance to use if no separate head model
+
+    bool _isFirstPerson;
+    std::vector<int> _headBones;
 };
 
 #endif // hifi_SkeletonModel_h

libraries/octree/src/ViewFrustum.h

@@ -31,7 +31,7 @@ const float DEFAULT_KEYHOLE_RADIUS = 3.0f;
 const float DEFAULT_FIELD_OF_VIEW_DEGREES = 45.0f;
 const float DEFAULT_ASPECT_RATIO = 16.0f/9.0f;
 //const float DEFAULT_NEAR_CLIP = 0.08f;
-const float DEFAULT_NEAR_CLIP = 0.25f;
+const float DEFAULT_NEAR_CLIP = 0.1f;
 const float DEFAULT_FAR_CLIP = (float)TREE_SCALE;
 
 class ViewFrustum {

libraries/render-utils/src/JointState.h

@@ -106,6 +106,9 @@ public:
     glm::quat computeParentRotation() const;
     glm::quat computeVisibleParentRotation() const;
 
+    void setTransform(const glm::mat4& transform) { _transform = transform; }
+    void setVisibleTransform(const glm::mat4& transform) { _visibleTransform = transform; }
+
 private:
     void setRotationInConstrainedFrameInternal(const glm::quat& targetRotation);
     /// debug helper function

libraries/render-utils/src/Model.cpp

@@ -1102,9 +1102,11 @@ void Model::setURL(const QUrl& url, const QUrl& fallback, bool retainCurrent, bo
     _readyWhenAdded = false; // reset out render items.
     _needsReload = true;
     invalidCalculatedMeshBoxes();
-    
+
     _url = url;
 
+    onInvalidate();
+
     // if so instructed, keep the current geometry until the new one is loaded 
     _nextBaseGeometry = _nextGeometry = DependencyManager::get<GeometryCache>()->getGeometry(url, fallback, delayLoad);
     _nextLODHysteresis = NetworkGeometry::NO_HYSTERESIS;
@@ -1380,6 +1382,26 @@ void Model::simulate(float deltaTime, bool fullUpdate) {
     }
 }
 
+void Model::updateClusterMatrices() {
+    const FBXGeometry& geometry = _geometry->getFBXGeometry();
+    glm::mat4 modelToWorld = glm::mat4_cast(_rotation);
+    for (int i = 0; i < _meshStates.size(); i++) {
+        MeshState& state = _meshStates[i];
+        const FBXMesh& mesh = geometry.meshes.at(i);
+        if (_showTrueJointTransforms) {
+            for (int j = 0; j < mesh.clusters.size(); j++) {
+                const FBXCluster& cluster = mesh.clusters.at(j);
+                state.clusterMatrices[j] = modelToWorld * _jointStates[cluster.jointIndex].getTransform() * cluster.inverseBindMatrix;
+            }
+        } else {
+            for (int j = 0; j < mesh.clusters.size(); j++) {
+                const FBXCluster& cluster = mesh.clusters.at(j);
+                state.clusterMatrices[j] = modelToWorld * _jointStates[cluster.jointIndex].getVisibleTransform() * cluster.inverseBindMatrix;
+            }
+        }
+    }
+}
+
 void Model::simulateInternal(float deltaTime) {
     // update the world space transforms for all joints
     
@@ -2120,6 +2142,34 @@ void Model::pickPrograms(gpu::Batch& batch, RenderMode mode, bool translucent, f
     }
 }
 
+bool Model::initWhenReady(render::ScenePointer scene) {
+    if (isActive() && isRenderable() && !_meshGroupsKnown && isLoadedWithTextures()) {
+        segregateMeshGroups();
+
+        render::PendingChanges pendingChanges;
+
+        foreach (auto renderItem, _transparentRenderItems) {
+            auto item = scene->allocateID();
+            auto renderData = MeshPartPayload::Pointer(renderItem);
+            auto renderPayload = render::PayloadPointer(new MeshPartPayload::Payload(renderData));
+            _renderItems.insert(item, renderPayload);
+            pendingChanges.resetItem(item, renderPayload);
+        }
+
+        foreach (auto renderItem, _opaqueRenderItems) {
+            auto item = scene->allocateID();
+            auto renderData = MeshPartPayload::Pointer(renderItem);
+            auto renderPayload = render::PayloadPointer(new MeshPartPayload::Payload(renderData));
+            _renderItems.insert(item, renderPayload);
+            pendingChanges.resetItem(item, renderPayload);
+        }
+        scene->enqueuePendingChanges(pendingChanges);
+
+        _readyWhenAdded = true;
+        return true;
+    }
+    return false;
+}
 
 ModelBlender::ModelBlender() :
     _pendingBlenders(0) {

libraries/render-utils/src/Model.h

@@ -240,6 +240,8 @@ public:
     AABox getPartBounds(int meshIndex, int partIndex);
     void renderPart(RenderArgs* args, int meshIndex, int partIndex, bool translucent);
 
+    bool initWhenReady(render::ScenePointer scene);
+
 protected:
     QSharedPointer<NetworkGeometry> _geometry;
     
@@ -312,6 +314,12 @@ protected:
         _calculatedMeshTrianglesValid = false;
     }
 
+    // rebuild the clusterMatrices from the current jointStates
+    void updateClusterMatrices();
+
+    // hook for derived classes to be notified when setUrl invalidates the current model.
+    virtual void onInvalidate() {};
+
 private:
     
     friend class AnimationHandle;