implement 4.5

CGII/glsl/skinning.glvs

@@ -15,6 +15,11 @@ void main(void)
 
 	if(skinned)
 	{
-		/*Task: Implement Skinning */
+		Mat4 m = bone_weights[0] * bone_matrices[bone_indices[0]] + 
+				 bone_weights[1] * bone_matrices[bone_indices[1]] + 
+				 bone_weights[2] * bone_matrices[bone_indices[2]] + 
+				 bone_weights[3] * bone_matrices[bone_indices[3]];
+				 
+		position = m * position;
 	}
 }

CGII/src/Mesh.cpp

@@ -9,32 +9,40 @@
 #include <sstream>
 #include <queue>
 
-
-
 bool Mesh::init_shaders(cgv::render::context &ctx)
 {
 	cgv::render::shader_code vs, fs, gs;
-	if (!vs.read_and_compile(ctx, "glsl/skinning.glvs", cgv::render::ST_VERTEX)) {
-		std::cout << "error reading vertex shader\n" << vs.last_error.c_str() << std::endl;
+	if (!vs.read_and_compile(ctx, "CGII/glsl/skinning.glvs", cgv::render::ST_VERTEX))
+	{
+		std::cout << "error reading vertex shader\n"
+				  << vs.last_error.c_str() << std::endl;
 		return false;
 	}
-	if (!gs.read_and_compile(ctx, "glsl/skinning.glgs", cgv::render::ST_GEOMETRY)) {
-		std::cout << "error reading geometry shader\n" << gs.last_error.c_str() << std::endl;
+	if (!gs.read_and_compile(ctx, "CGII/glsl/skinning.glgs", cgv::render::ST_GEOMETRY))
+	{
+		std::cout << "error reading geometry shader\n"
+				  << gs.last_error.c_str() << std::endl;
 		return false;
 	}
-	if (!fs.read_and_compile(ctx, "glsl/skinning.glfs", cgv::render::ST_FRAGMENT)) {
-		std::cout << "error reading fragment shader\n" << vs.last_error.c_str() << std::endl;
+	if (!fs.read_and_compile(ctx, "CGII/glsl/skinning.glfs", cgv::render::ST_FRAGMENT))
+	{
+		std::cout << "error reading fragment shader\n"
+				  << vs.last_error.c_str() << std::endl;
 		return false;
 	}
-	if (!prog.create(ctx)) {
-		std::cout << "error creating program\n" << prog.last_error.c_str() << std::endl;
+	if (!prog.create(ctx))
+	{
+		std::cout << "error creating program\n"
+				  << prog.last_error.c_str() << std::endl;
 		return false;
 	}
 	prog.attach_code(ctx, vs);
 	prog.attach_code(ctx, gs);
 	prog.attach_code(ctx, fs);
-	if (!prog.link(ctx)) {
-		std::cout << "link error\n" << prog.last_error.c_str() << std::endl;
+	if (!prog.link(ctx))
+	{
+		std::cout << "link error\n"
+				  << prog.last_error.c_str() << std::endl;
 		return false;
 	}
 	return true;
@@ -131,8 +139,6 @@ bool Mesh::read_obj(const char* filename)
 	return true;
 }
 
-
-
 void Mesh::read_attachment(std::string filename)
 {
 	std::ifstream f(filename);
@@ -147,6 +153,50 @@ void Mesh::read_attachment(std::string filename)
 	while (std::getline(f, line))
 	{
 		/*Task 4.5: Load attachment */
+		std::istringstream iss(line);
+
+		struct IndexedValue
+		{
+			int index;
+			float value;
+		};
+
+		std::vector<IndexedValue> values;
+		float value;
+
+		while (iss >> value)
+		{
+			IndexedValue iv;
+			iv.index = values.size();
+			iv.value = value;
+
+			values.emplace_back(iv);
+		}
+
+		std::sort(values.begin(), values.end(), [](IndexedValue &iv1, IndexedValue &iv2) -> bool {
+			return iv1.value > iv2.value;
+		});
+
+		float sum = 0.0f;
+
+		for (int i = 0; i < 4; i++)
+		{
+			sum += values[i].value;
+		}
+
+		Vec4 weights;
+		ivec4 indices;
+
+		for (int i = 0; i < 4; i++)
+		{
+			values[i].value / sum;
+
+			indices[i] = values[i].index;
+			weights[i] = values[i].value;
+		}
+
+		bone_indices.emplace_back(indices);
+		bone_weights.emplace_back(weights);
 	}
 
 	glBindBuffer(GL_ARRAY_BUFFER, boneIndexBuffer);

CGII/src/main.cpp

@@ -11,6 +11,9 @@
 #include "SkeletonViewer.h"
 #include "SkinnedMeshViewer.h"
 #include "IKViewer.h"
+#include <fstream>
+
+#include "program.h"
 
 using namespace cgv::base;
 
@@ -20,15 +23,16 @@ struct Initializer
 
 	Initializer()
 	{
-		
-
 		data = new DataStore();
 
+		/*
+		Program p;
+		//p.createProgram("CGII/glsl/skinning.glvs", "CGII/glsl/skinning.glgs", "CGII/glsl/skinning.glfs");
+		*/
+
 		register_object(base_ptr(new SkeletonViewer(data)), "");
-
 		register_object(base_ptr(new IKViewer(data)), "");
-
-		/*register_object(base_ptr(new SkinnedMeshViewer(data)), "");*/
+		register_object(base_ptr(new SkinnedMeshViewer(data)), "");
 	}
 
 	~Initializer()

CGII/src/program.h

@@ -0,0 +1,134 @@
+#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 + 1];
+            log[log_length] = '\0';
+
+            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