Uploading Assignment 4

1 files changed, 355 insertions, 0 deletions

diff --git a/dev/a4-dance/skeleton.cc b/dev/a4-dance/skeleton.cc
new file mode 100644
index 0000000..f7d8c45
--- /dev/null
+++ b/dev/a4-dance/skeleton.cc
@@ -0,0 +1,355 @@
+#include "skeleton.h"
+#include "amc_util.h"
+
+
+Skeleton::Skeleton() : using_degrees_(false) {
+}
+
+Skeleton::~Skeleton() {
+    
+}
+
+int Skeleton::num_root_bones() const {
+    return (int)root_bones_.size();
+}
+
+std::string Skeleton::root_bone(int i) const {
+    return root_bones_[i];
+}
+
+int Skeleton::num_children(const std::string &bone_name) const {
+    if (children_.find(bone_name) == children_.end()) {
+        return 0;
+    }
+    else {
+        return (int)children_.find(bone_name)->second.size();
+    }
+}
+
+std::string Skeleton::child_bone(const std::string &bone_name, int i) const {
+    return children_.find(bone_name)->second[i];
+}
+
+bool Skeleton::rx_dof(const std::string &bone_name) const {
+    return rx_dof_.find(bone_name)->second;
+}
+
+Vector2 Skeleton::rx_limits(const std::string &bone_name) const {
+    return rx_limits_.find(bone_name)->second;
+}
+
+bool Skeleton::ry_dof(const std::string &bone_name) const {
+    return ry_dof_.find(bone_name)->second;
+}
+
+Vector2 Skeleton::ry_limits(const std::string &bone_name) const {
+    return ry_limits_.find(bone_name)->second;
+}
+
+bool Skeleton::rz_dof(const std::string &bone_name) const {
+    return rz_dof_.find(bone_name)->second;
+}
+
+Vector2 Skeleton::rz_limits(const std::string &bone_name) const {
+    return rz_limits_.find(bone_name)->second;
+}
+
+int Skeleton::degrees_of_freedom(const std::string &bone_name) const {
+    return (int)rx_dof(bone_name) + (int)ry_dof(bone_name) + (int)rz_dof(bone_name);
+}
+
+
+Vector3 Skeleton::BoneDirectionAndLength(const std::string &bone_name) const {
+    return lengths_.find(bone_name)->second * directions_.find(bone_name)->second;
+}
+
+Matrix4 Skeleton::BoneSpaceToRotAxesSpace(const std::string &bone_name) const {
+    return bone_to_rot_axes_.find(bone_name)->second;
+}
+
+Matrix4 Skeleton::RotAxesSpaceToBoneSpace(const std::string &bone_name) const {
+    return rot_axes_to_bone_.find(bone_name)->second;
+}
+
+Matrix4 Skeleton::BoneSpaceToChildrenSpace(const std::string &bone_name) const {
+    return bone_to_children_.find(bone_name)->second;
+}
+
+
+const bool ABORT_ON_ERROR=true;
+void assume(bool b) {
+  if (!b && ABORT_ON_ERROR) {
+    std::abort();
+  }
+}
+
+
+void Skeleton::LoadFromASF(const std::string &asf_filename) {
+    std::ifstream in(asf_filename.c_str());
+    SimpleParser parser(&in);
+    
+    while (parser.Good()) {
+        if (parser.Expect("#")) {
+            //std::cerr << "Ignoring comment line" << std::endl;
+            parser.SwallowLine();
+        }
+        
+        else if (parser.Expect(":version")) {
+            parser.SwallowLine();
+        }
+        
+        else if (parser.Expect(":name")) {
+            //std::cerr << "Swallowing name" << std::endl;
+            parser.SwallowLine();
+        }
+        
+        else if (parser.Expect(":units")) {
+            //std::cerr << "Reading units" << std::endl;
+            ParseUnits(&parser);
+        }
+        
+        else if (parser.Expect(":documentation")) {
+            //std::cerr << "Reading documentation" << std::endl;
+            while (parser.Good() && !parser.Peek(":")) {
+                parser.SwallowLine();
+            }
+        }
+        
+        else if (parser.Expect(":root")) {
+            //std::cerr << "Reading root" << std::endl;
+            ParseRoot(&parser);
+        }
+        
+        else if (parser.Expect(":bonedata")) {
+            //std::cerr << "Reading bonedata" << std::endl;
+            ParseBonedata(&parser);
+        }
+        
+        else if (parser.Expect(":hierarchy")) {
+            //std::cerr << "Reading hierarchy" << std::endl;
+            ParseHierarchy(&parser);
+        }
+        
+        else {
+            std::string tok;
+            parser.ReadToken(tok);
+            if (!parser.Good()) {
+                break;
+            }
+            std::cerr << "Encountered unknown token" << std::endl;
+            std::cerr << "'" << tok << "'" << std::endl;
+            std::abort();
+        }
+    } // end while (looping over file)
+}
+
+
+void Skeleton::ParseUnits(SimpleParser *parser) {
+    bool cont;
+    do {
+        cont = false;
+        
+        if (parser->Expect("mass")) {
+            float trash;
+            parser->ReadFloat(trash);
+            cont = true;
+        }
+        
+        if (parser->Expect("length")) {
+            float trash;
+            parser->ReadFloat(trash);
+            cont = true;
+        }
+        
+        if (parser->Expect("angle")) {
+            std::string token;
+            parser->ReadToken(token);
+            if (token == "deg") {
+                using_degrees_ = true;
+            }
+        }
+    } while (cont);
+}
+
+void Skeleton::ParseRoot(SimpleParser *parser) {
+    bool cont;
+    do {
+        cont = false;
+        
+        if (parser->Expect("order")) {
+            cont = true;
+            if (!parser->Expect("TX TY TZ RX RY RZ")) {
+                std::cerr << "'order' not in order expected" << std::endl;
+                std::abort();
+            }
+        }
+        
+        if (parser->Expect("axis")) {
+            cont = true;
+            if (!parser->Expect("XYZ")) {
+                std::cerr << "'axis' not in order expected" << std::endl;
+                std::abort();
+            }
+        }
+        
+        if (parser->Expect("position")) {
+            cont = true;
+            parser->ReadFloat(root_position_[0]);
+            parser->ReadFloat(root_position_[1]);
+            parser->ReadFloat(root_position_[2]);
+            root_position_ = amc2meter(root_position_);
+        }
+        
+        if (parser->Expect("orientation")) {
+            cont = true;
+            parser->ReadFloat(root_orientation_[0]);
+            parser->ReadFloat(root_orientation_[1]);
+            parser->ReadFloat(root_orientation_[2]);
+        }
+        
+    } while (cont);
+}
+
+
+void Skeleton::ParseBonedata(SimpleParser *parser) {
+    while (parser->Expect("begin")) {
+        int id = -1;
+        std::string name;
+        Vector3 direction;
+        float length = 0.0;
+        Matrix4 bone_to_rot_axes;
+        Matrix4 rot_axes_to_bone;
+        bool rx_dof = false;
+        bool ry_dof = false;
+        bool rz_dof = false;
+        Vector2 rx_limits;
+        Vector2 ry_limits;
+        Vector2 rz_limits;
+        
+        while (!parser->Expect("end")) {
+            
+            if (parser->Expect("id")) {
+                parser->ReadInt(id);
+            }
+            
+            if (parser->Expect("name")) {
+                parser->ReadToken(name);
+            }
+            
+            if (parser->Expect("direction")) {
+                parser->ReadFloat(direction[0]);
+                parser->ReadFloat(direction[1]);
+                parser->ReadFloat(direction[2]);
+            }
+            
+            if (parser->Expect("length")) {
+                parser->ReadFloat(length);
+                length = amc2meter(length);
+            }
+            
+            if (parser->Expect("axis")) {
+                float ax, ay, az;
+                std::string axis_type;
+                parser->ReadFloat(ax);
+                parser->ReadFloat(ay);
+                parser->ReadFloat(az);
+                if (using_degrees_) {
+                    ax = GfxMath::ToRadians(ax);
+                    ay = GfxMath::ToRadians(ay);
+                    az = GfxMath::ToRadians(az);
+                }
+                parser->ReadToken(axis_type);
+                if (axis_type == "XYZ") {
+                    rot_axes_to_bone = Matrix4::RotationZ(az) *
+                        Matrix4::RotationY(ay) *
+                        Matrix4::RotationX(ax);
+                    bone_to_rot_axes = rot_axes_to_bone.Inverse();
+                }
+                else {
+                    std::cerr << "'axis type' not in order expected" << std::endl;
+                    std::abort();
+                }
+            }
+            
+            if (parser->Expect("dof")) {
+                rx_dof = parser->Expect("rx");
+                ry_dof = parser->Expect("ry");
+                rz_dof = parser->Expect("rz");
+            }
+            
+            
+            if (parser->Expect("limits")) {
+                int ndof = (int)rx_dof + (int)ry_dof + (int)rz_dof;
+                for (int dof=0; dof < ndof; dof++) {
+                    assume(parser->Expect("("));
+                    float min, max;
+                    parser->ReadFloat(min);
+                    parser->ReadFloat(max);
+                    assume(parser->Expect(")"));
+                    
+                    if (dof == 0) {
+                        if (rx_dof)      rx_limits = Vector2(min, max);
+                        else if (ry_dof) ry_limits = Vector2(min, max);
+                        else if (rz_dof) rz_limits = Vector2(min, max);
+                        else abort();
+                    }
+                    else if (dof == 1) {
+                        if (rx_dof && ry_dof)      ry_limits = Vector2(min, max);
+                        else if (rx_dof && rz_dof) rz_limits = Vector2(min, max);
+                        else if (ry_dof && rz_dof) rz_limits = Vector2(min, max);
+                        else abort();
+                    }
+                    else if (dof == 2) {
+                        if (rx_dof && ry_dof && rz_dof) rz_limits = Vector2(min, max);
+                        else abort();
+                    }
+                    else {
+                        std::cerr << "bad dof limits" << std::endl;
+                        abort();
+                    }
+                }
+            }
+        } // read "end" token
+        
+        // save the bone to the skeleton data structure
+        ids_[name] = id;
+        directions_[name] = direction;
+        lengths_[name] = length;
+        rx_dof_[name] = rx_dof;
+        ry_dof_[name] = ry_dof;
+        rz_dof_[name] = rz_dof;
+        rx_limits_[name] = rx_limits;
+        ry_limits_[name] = ry_limits;
+        rz_limits_[name] = rz_limits;
+        bone_to_rot_axes_[name] = bone_to_rot_axes;
+        rot_axes_to_bone_[name] = rot_axes_to_bone;
+        bone_to_children_[name] = Matrix4::Translation(length * direction);
+    }
+}
+
+void Skeleton::ParseHierarchy(SimpleParser *parser) {
+    if (!parser->Expect("begin")) {
+        std::cerr << "Reading hierarchy, expected 'begin', not found" << std::endl;
+        std::abort();
+    }
+    while (!parser->Expect("end")) {
+        std::string line;
+        std::string parent;
+        parser->ReadToken(parent);
+        parser->ReadLine(line);
+        
+        std::stringstream ss(line);
+        std::string child;
+        ss >> child;
+        while (ss) {
+            if (parent == "root") {
+                root_bones_.push_back(child);
+            }
+            else {
+                children_[parent].push_back(child);
+            }
+            ss >> child;
+        }
+    }
+}
+