Add gl wrapper classes

.vscode/settings.json

@@ -2,5 +2,11 @@
     "C_Cpp.default.includePath": [
         "CGII/src/",
         "framework/include/"
-    ]
+    ],
+    "files.associations": {
+        "array": "cpp",
+        "initializer_list": "cpp",
+        "string_view": "cpp",
+        "valarray": "cpp"
+    }
 }

CGII/glsl/skinning.glgs

@@ -1,4 +1,4 @@
-#version 330 compatibility
+#version 150
 layout(triangles) in;
 layout(triangle_strip, max_vertices = 3) out;
 

CGII/src/Bone.cpp

@@ -11,7 +11,8 @@
 
 Bone::Bone()
 	: parent(nullptr), length(0.0f), direction_in_world_space(0.0, 0.0, 0.0), translationTransforms(0)
-{}
+{
+}
 
 Bone::~Bone()
 {
@@ -26,10 +27,23 @@ Bone::~Bone()
 	orientation.clear();
 }
 
+void print_mat4(Mat4 &m)
+{
+	for (int x = 0; x < 4; x++)
+	{
+		for (int y = 0; y < 4; y++)
+		{
+			std::cout << m[x * 4 + y] << " ";
+		}
+
+		std::cout << std::endl;
+	}
+}
+
 void Bone::calculate_matrices()
 {
 	orientationTransformGlobalToLocal.identity();
-	std::for_each(orientation.begin(), orientation.end(), [&](AtomicTransform* t) {
+	std::for_each(orientation.begin(), orientation.end(), [&](AtomicTransform *t) {
 		orientationTransformGlobalToLocal = orientationTransformGlobalToLocal * t->calculate_matrix();
 	});
 	orientationTransformLocalToGlobal = cgv::math::inv(orientationTransformGlobalToLocal);
@@ -55,10 +69,10 @@ Mat4 Bone::calculate_transform_prev_to_current_without_dofs()
 	return t;
 }
 
-void Bone::add_dof(AtomicTransform* dof)
+void Bone::add_dof(AtomicTransform *dof)
 {
 	dof->set_index_in_amc(dofs.size());
-	if (dynamic_cast<AtomicTranslationTransform*>(dof))
+	if (dynamic_cast<AtomicTranslationTransform *>(dof))
 	{
 		dofs.push_front(std::shared_ptr<AtomicTransform>(dof));
 		++translationTransforms;
@@ -67,40 +81,40 @@ void Bone::add_dof(AtomicTransform* dof)
 		dofs.insert(dofs.begin() + translationTransforms, std::shared_ptr<AtomicTransform>(dof));
 }
 
-void Bone::set_name(const std::string& name) { this->name = name; }
-const std::string& Bone::get_name() const { return name; }
+void Bone::set_name(const std::string &name) { this->name = name; }
+const std::string &Bone::get_name() const { return name; }
 
-void Bone::set_direction_in_world_space(const Vec3& direction) { this->direction_in_world_space = direction; }
-const Vec3& Bone::get_direction_in_world_space() const { return direction_in_world_space; }
+void Bone::set_direction_in_world_space(const Vec3 &direction) { this->direction_in_world_space = direction; }
+const Vec3 &Bone::get_direction_in_world_space() const { return direction_in_world_space; }
 
 void Bone::set_length(float l) { this->length = l; }
 float Bone::get_length() const { return length; }
 
-void Bone::add_axis_rotation(AtomicTransform* transform) { orientation.push_front(transform); }
-void Bone::add_child(Bone* child)
+void Bone::add_axis_rotation(AtomicTransform *transform) { orientation.push_front(transform); }
+void Bone::add_child(Bone *child)
 {
 	child->set_parent(this);
 	children.push_back(child);
 }
-Bone* Bone::child_at(int i) const { return children[i]; }
+Bone *Bone::child_at(int i) const { return children[i]; }
 int Bone::childCount() const { return children.size(); }
 
-void Bone::set_parent(Bone* parent)
+void Bone::set_parent(Bone *parent)
 {
 	this->parent = parent;
 }
-Bone* Bone::get_parent() const { return parent; }
+Bone *Bone::get_parent() const { return parent; }
 
 int Bone::dof_count() const { return dofs.size(); }
 std::shared_ptr<AtomicTransform> Bone::get_dof(int dofIndex) const { return dofs[dofIndex]; }
 
-const Mat4& Bone::get_binding_pose_matrix() const
+const Mat4 &Bone::get_binding_pose_matrix() const
 {
 	return transformLocalToGlobal;
 }
 
-const Mat4& Bone::get_translation_transform_current_joint_to_next() const { return translationTransformCurrentJointToNext; }
-const Mat4& Bone::get_orientation_transform_prev_joint_to_current() const { return orientationTransformPrevJointToCurrent; }
+const Mat4 &Bone::get_translation_transform_current_joint_to_next() const { return translationTransformCurrentJointToNext; }
+const Mat4 &Bone::get_orientation_transform_prev_joint_to_current() const { return orientationTransformPrevJointToCurrent; }
 
 Vec4 Bone::get_bone_local_root_position() const { return Vec4(0, 0, 0, 1); }
 Vec4 Bone::get_bone_local_tip_position() const { return translationTransformCurrentJointToNext * Vec4(0, 0, 0, 1); }

CGII/src/GLClasses/buffer.h

@@ -0,0 +1,32 @@
+#ifndef BUFFER
+#define BUFFER
+
+#include <vector>
+#include <GL/gl.h>
+
+template <class T>
+unsigned int sizevec(const std::vector<T> &p_vec) { return sizeof(T) * p_vec.size(); }
+
+class Buffer
+{
+  public:
+    Buffer()
+    {
+        glGenBuffers(1, &m_vbo);
+    }
+
+    ~Buffer()
+    {
+        glDeleteBuffers(1, &m_vbo);
+    }
+
+    GLuint getBuffer()
+    {
+        return m_vbo;
+    }
+
+  private:
+    GLuint m_vbo;
+};
+
+#endif // BUFFER

CGII/src/GLClasses/program.h

@@ -0,0 +1,133 @@
+#ifndef PROGRAM
+#define PROGRAM
+
+#include <fstream>
+#include <iostream>
+#include <string>
+
+#include <GL/gl.h>
+
+class Program
+{
+  public:
+    Program()
+    {
+    }
+
+    ~Program()
+    {
+        glDeleteProgram(m_prog);
+    }
+
+    void createProgram(const char *vs, const char *fs)
+    {
+        GLuint vert = createShader(vs, GL_VERTEX_SHADER);
+        GLuint frag = createShader(fs, GL_FRAGMENT_SHADER);
+
+        if ((vert == 0) || (frag == 0))
+        {
+            return;
+        }
+
+        m_prog = glCreateProgram();
+        glAttachShader(m_prog, vert);
+        glAttachShader(m_prog, frag);
+        glLinkProgram(m_prog);
+
+        glDeleteShader(vert);
+        glDeleteShader(frag);
+    }
+
+    void createProgram(const char *vs, const char *gs, const char *fs)
+    {
+        GLuint vert = createShader(vs, GL_VERTEX_SHADER);
+        GLuint geom = createShader(gs, GL_GEOMETRY_SHADER);
+        GLuint frag = createShader(fs, GL_FRAGMENT_SHADER);
+
+        if ((vert == 0) || (frag == 0) || (geom == 0))
+        {
+            return;
+        }
+
+        m_prog = glCreateProgram();
+        glAttachShader(m_prog, vert);
+        glAttachShader(m_prog, geom);
+        glAttachShader(m_prog, frag);
+        glLinkProgram(m_prog);
+
+        glDeleteShader(vert);
+        glDeleteShader(geom);
+        glDeleteShader(frag);
+    }
+
+    void createProgram(const std::string vs, const std::string fs)
+    {
+        createProgram(vs.c_str(), fs.c_str());
+    }
+
+    GLuint getProgram()
+    {
+        return m_prog;
+    }
+
+  private:
+    inline std::string loadShaderText(const char *path)
+    {
+        std::ifstream is(path);
+        std::string s_save;
+
+        if (is.is_open())
+        {
+            s_save.assign(std::istreambuf_iterator<char>(is), std::istreambuf_iterator<char>());
+            is.close();
+        }
+        else
+        {
+            std::cout << "could not open " << path << std::endl;
+        }
+
+        return s_save;
+    }
+
+    inline GLuint createShader(const char *path, GLenum shadertype)
+    {
+        std::string s_source = loadShaderText(path);
+
+        if (s_source.empty())
+        {
+            return 0;
+        }
+
+        const char *c_source = s_source.c_str();
+
+        GLuint shader = glCreateShader(shadertype);
+        glShaderSource(shader, 1, (const char **)&c_source, NULL);
+        glCompileShader(shader);
+
+        GLint shaderCompiled = GL_FALSE;
+        glGetShaderiv(shader, GL_COMPILE_STATUS, &shaderCompiled);
+        if (shaderCompiled != GL_TRUE)
+        {
+            GLint log_length = 0;
+            glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &log_length);
+
+            char *log = new char[log_length];
+
+            glGetShaderInfoLog(shader, (GLsizei)log_length, NULL, log);
+
+            std::cout << "error compiling shader( " << path << " ): " << std::endl
+                      << log << std::endl;
+
+            delete[] log;
+
+            glDeleteShader(shader);
+            shader = 0;
+        }
+
+        return shader;
+    }
+
+    GLuint m_prog;
+};
+
+#endif // PROGRAM

CGII/src/SkeletonViewer.cpp

@@ -18,19 +18,27 @@ using namespace cgv::utils;
 cgv::render::shader_program Mesh::prog;
 
 // The constructor of this class
-SkeletonViewer::SkeletonViewer(DataStore* data)
+SkeletonViewer::SkeletonViewer(DataStore *data)
 	: node("Skeleton Viewer"), data(data)
 
 {
+	program.createProgram("CGII/glsl/skinning.glvs", "CGII/glsl/skinning.glgs", "CGII/glsl/skinning.glfs");
+
 	connect(data->skeleton_changed, this, &SkeletonViewer::skeleton_changed);
 
 	connect(get_animation_trigger().shoot, this, &SkeletonViewer::timer_event);
 }
 
 //draws a part of a skeleton, represented by the given root node
-void SkeletonViewer::draw_skeleton_subtree(Bone* node, const Mat4& global_to_parent_local)
+void SkeletonViewer::draw_skeleton_subtree(Bone *node, const Mat4 &global_to_parent_local)
 {
 	//Task: Draw skeleton
+	Mat4 transform;
+
+	for (int i = 0; i < node->childCount(); i++)
+	{
+		draw_skeleton_subtree(node->child_at(i), transform);
+	}
 }
 
 void SkeletonViewer::timer_event(double, double dt)
@@ -57,9 +65,10 @@ void SkeletonViewer::skeleton_changed(std::shared_ptr<Skeleton> s)
 	generate_tree_view_nodes();
 
 	//Fit view to skeleton
-	std::vector<cgv::render::view*> view_ptrs;
+	std::vector<cgv::render::view *> view_ptrs;
 	cgv::base::find_interface<cgv::render::view>(get_node(), view_ptrs);
-	if (view_ptrs.empty()) {
+	if (view_ptrs.empty())
+	{
 		// If there is no view, we cannot update it
 		cgv::gui::message("could not find a view to adjust!!");
 	}
@@ -77,7 +86,7 @@ void SkeletonViewer::skeleton_changed(std::shared_ptr<Skeleton> s)
 	post_redraw();
 }
 
-void SkeletonViewer::recursive_connect_signals(Bone* b)
+void SkeletonViewer::recursive_connect_signals(Bone *b)
 {
 	for (int i = 0; i < b->dof_count(); ++i)
 		connect(b->get_dof(i)->changed_signal, this, &SkeletonViewer::dof_changed);
@@ -103,7 +112,7 @@ void SkeletonViewer::generate_tree_view_nodes()
 	generate_tree_view_nodes(tree_view, data->get_skeleton()->get_root());
 }
 
-void SkeletonViewer::generate_tree_view_nodes(gui_group_ptr parent, Bone* bone)
+void SkeletonViewer::generate_tree_view_nodes(gui_group_ptr parent, Bone *bone)
 {
 	if (bone->childCount() == 0)
 	{
@@ -123,7 +132,7 @@ void SkeletonViewer::generate_tree_view_nodes(gui_group_ptr parent, Bone* bone)
 
 void SkeletonViewer::start_choose_base()
 {
-	Bone* b = data->get_endeffector();
+	Bone *b = data->get_endeffector();
 	data->set_endeffector(nullptr);
 	data->set_base(b);
 }
@@ -134,7 +143,7 @@ void SkeletonViewer::tree_selection_changed(base_ptr p, bool select)
 
 	if (select)
 	{
-		Bone* bone = gui_to_bone.at(p);
+		Bone *bone = gui_to_bone.at(p);
 		generate_bone_gui(bone);
 		data->set_endeffector(bone);
 	}
@@ -233,28 +242,28 @@ void SkeletonViewer::create_gui()
 	auto gui_group = dock_group->add_group("", "align_group", "", "f");
 
 	connect_copy(gui_group->add_button("Load ASF skeleton", "", "\n")->click,
-		rebind(this, &SkeletonViewer::load_skeleton));	
+				 rebind(this, &SkeletonViewer::load_skeleton));
 
 	connect_copy(gui_group->add_button("Load Animation", "", "\n")->click,
-		rebind(this, &SkeletonViewer::load_animation));
+				 rebind(this, &SkeletonViewer::load_animation));
 
 	connect_copy(gui_group->add_button("Start Animation", "", "\n")->click,
-		rebind(this, &SkeletonViewer::start_animation));
+				 rebind(this, &SkeletonViewer::start_animation));
 
 	connect_copy(gui_group->add_button("Stop Animation", "", "\n")->click,
-		rebind(this, &SkeletonViewer::stop_animation));
+				 rebind(this, &SkeletonViewer::stop_animation));
 
 	connect_copy(gui_group->add_button("Choose IK Base", "", "\n")->click,
-		rebind(this, &SkeletonViewer::start_choose_base));
+				 rebind(this, &SkeletonViewer::start_choose_base));
 
 	connect_copy(gui_group->add_button("Write Pinocchio skeleton", "", "\n")->click,
-		rebind(this, &SkeletonViewer::write_pinocchio));
+				 rebind(this, &SkeletonViewer::write_pinocchio));
 
 	connect_copy(gui_group->add_button("Load Pinocchio skeleton", "", "\n")->click,
-		rebind(this, &SkeletonViewer::load_pinocchio));
+				 rebind(this, &SkeletonViewer::load_pinocchio));
 }
 
-void SkeletonViewer::generate_bone_gui(Bone* bone)
+void SkeletonViewer::generate_bone_gui(Bone *bone)
 {
 	// Add bone-specific gui elements to bone_group.
 	// Use the layout "\n" to specify vertical alignment
@@ -270,7 +279,7 @@ void SkeletonViewer::generate_bone_gui(Bone* bone)
 	}
 }
 
-void SkeletonViewer::draw(context& c) 
+void SkeletonViewer::draw(context &c)
 {
 	glDisable(GL_LIGHTING);
 	glDisable(GL_CULL_FACE);

CGII/src/SkeletonViewer.h

@@ -7,6 +7,9 @@
 #include "common.h"
 #include "DataStore.h"
 
+#include "GLClasses/buffer.h"
+#include "GLClasses/program.h"
+
 #include <cgv/gui/trigger.h>
 #include <cgv/gui/provider.h>
 #include <cgv/gui/event_handler.h>
@@ -23,23 +26,23 @@ using namespace cgv::utils;
 
 class SkeletonViewer : public node, public drawable, public provider
 {
-private:
-	DataStore* data;
+  private:
+	DataStore *data;
 	gui_group_ptr tree_view;
 	gui_group_ptr bone_group;
 
 	// Maps gui elements in the tree view to a specific bone
-	std::map<base_ptr, Bone*> gui_to_bone;
+	std::map<base_ptr, Bone *> gui_to_bone;
 
 	// slot for the signal
 	void timer_event(double, double dt);
 	void skeleton_changed(std::shared_ptr<Skeleton>);
 
 	void generate_tree_view_nodes();
-	void generate_tree_view_nodes(gui_group_ptr parent, Bone* bone);
+	void generate_tree_view_nodes(gui_group_ptr parent, Bone *bone);
 
 	void tree_selection_changed(base_ptr p, bool select);
-	void generate_bone_gui(Bone* bone);
+	void generate_bone_gui(Bone *bone);
 
 	void load_skeleton();
 	void write_pinocchio();
@@ -47,25 +50,24 @@ private:
 	void load_animation();
 	void start_choose_base();
 
-	void draw_skeleton_subtree(Bone* node, const Mat4& global_to_parent_local);
+	void draw_skeleton_subtree(Bone *node, const Mat4 &global_to_parent_local);
 
 	void dof_changed(double new_value);
-	void recursive_connect_signals(Bone* b);
-
-	
+	void recursive_connect_signals(Bone *b);
 
 	void start_animation();
 	void stop_animation();
 
-public:
+  public:
 	// The constructor of this class
-	SkeletonViewer(DataStore*);	
+	SkeletonViewer(DataStore *);
 
 	// Create the gui elements
 	void create_gui();
 	// Draw the scene
-	void draw(context& c);
+	void draw(context &c);
 
 	std::string get_parent_type() const;
-};
 
+	Program program;
+};

CGII/src/main.cpp

@@ -16,15 +16,15 @@ using namespace cgv::base;
 
 struct Initializer
 {
-	DataStore* data;
+	DataStore *data;
 
 	Initializer()
 	{
-		register_object(base_ptr(new CGVDemo()), "");
+		//register_object(base_ptr(new CGVDemo()), "");
 
 		data = new DataStore();
 
-		/*register_object(base_ptr(new SkeletonViewer(data)), "");*/
+		register_object(base_ptr(new SkeletonViewer(data)), "");
 
 		/*register_object(base_ptr(new IKViewer(data)), "");*/