added point light, added name to mesh serialisation

src/light.cpp

@@ -27,11 +27,23 @@ const glm::mat4 Light::biasMatrix(
         0.0, 0.0, 0.5, 0.0,
         0.5, 0.5, 0.5, 1.0);
 
+const glm::mat4 PointLight::m_viewMatrices[6] =
+{
+    glm::lookAt(glm::vec3(0), glm::vec3(1, 0, 0 ), glm::vec3(0,-1, 0 )),
+    glm::lookAt(glm::vec3(0), glm::vec3(-1,0, 0 ), glm::vec3(0,-1, 0 )),
+    glm::lookAt(glm::vec3(0), glm::vec3(0, 1, 0 ), glm::vec3(0, 0, 1 )),
+    glm::lookAt(glm::vec3(0), glm::vec3(0, -1,0 ), glm::vec3(0, 0, -1)),
+    glm::lookAt(glm::vec3(0), glm::vec3(0, 0, 1 ), glm::vec3(0,-1, 0 )),
+    glm::lookAt(glm::vec3(0), glm::vec3(0, 0, -1), glm::vec3(0,-1, 0 ))
+};
+
 void AmbientLight::bindAttributes(Shader *shader, Camera *camera)
 {
     shader->bindVec3(shader->getLocation("lightColor"), m_color);
 }
 
+// DIRECTIONNAL LIGHT
+
 int DirectionnalLight::m_shaderRefCounter = 0;
 Shader* DirectionnalLight::m_shaders[4] = {NULL};
 
@@ -218,6 +230,119 @@ void DirectionnalLight::updateShadowMap(Scene* scene)
         }
     }
 }
+
+// POINT LIGHT
+
+int PointLight::m_shaderRefCounter = 0;
+Shader* PointLight::m_shaders[2] = {NULL};
+
+PointLight::PointLight(glm::vec3 pos, float attenuation, glm::vec3 lightColor) :
+    m_position(pos),
+    m_attenuation(attenuation),
+    m_shadowCaster(false)
+    
+{
+    m_color = lightColor;
+    m_shadowMap = NULL;
+}
+
+void PointLight::bindAttributes(Shader *shader, Camera *camera)
+{
+    glm::vec4 posInView = camera->getViewMatrix() * glm::vec4(m_position.x, m_position.y, m_position.z, 1.f);
+    shader->bindVec3(shader->getLocation("lightColor"), m_color);
+    shader->bindVec3(shader->getLocation("pointLight"), glm::vec3(posInView));
+    shader->bindFloat(shader->getLocation("attenuation"), m_attenuation);
+    if(m_shadowCaster)
+    {
+        m_shadowMap->getTexture(0)->bind(7); // TODO use something else than 7
+        shader->bindInteger(shader->getLocation("shadowMap"), 7);
+    }
+}
+
+unsigned int PointLight::getFlags()
+{
+    unsigned int flag = 1 << POINT_FLAG;
+    if(m_shadowCaster)
+        flag |= 1 << SHADOWMAP_FLAG;
+    return flag;
+}
+
+void PointLight::initShadowMap(int resolution)
+{
+    m_shadowMapResolution = resolution;
+    
+    // shader compilation
+    if(m_shaderRefCounter == 0)
+    {
+        ShaderSource source;
+        Resource::ResourceMap shaderMap;
+        Resource::getResourcePack_shaders(shaderMap);
+        source.setSource(shaderMap["shaders/shadow.vert.glsl"], ShaderSource::VERTEX);
+        source.setSource(shaderMap["shaders/shadow.geom.glsl"], ShaderSource::GEOMETRY);
+        source.setSource(shaderMap["shaders/shadow.frag.glsl"], ShaderSource::FRAGMENT);
+        unsigned int flag = 1 << POINT_FLAG;
+        m_shaders[0] = source.compile(Mesh::MESH_3D, flag);
+        m_shaders[1] = source.compile(Mesh::MESH_3D & Mesh::MATERIAL_ALPHA_MASK, flag);
+    }
+    if(!m_shadowCaster)
+        ++m_shaderRefCounter;
+    m_shadowCaster = true;
+    
+    // Depth buffer
+    Texture *tex = new Texture(GL_DEPTH_COMPONENT, GL_DEPTH_COMPONENT, resolution, resolution, GL_FLOAT, GL_TEXTURE_CUBE_MAP);
+    tex->setParameter(GL_TEXTURE_COMPARE_MODE, GL_COMPARE_REF_TO_TEXTURE);
+    tex->setParameter(GL_TEXTURE_COMPARE_FUNC, GL_LESS);
+
+    // framebuffer
+    m_shadowCaster = true;
+    m_shadowMap = new FrameBuffer();
+    m_shadowMap->addTexture(tex, GL_DEPTH_ATTACHMENT);
+    m_shadowMap->initColorAttachments();
+}
+
+void PointLight::destroyShadowMap()
+{
+    if(m_shadowCaster)
+    {
+        m_shadowCaster = false;
+        --m_shaderRefCounter;
+        if(m_shaderRefCounter == 0)
+        {
+            for(int i=0; i<2; ++i)
+                delete m_shaders[i];
+        }
+        if(m_shadowMap != NULL)
+            delete m_shadowMap;
+    }
+    m_shadowMap = NULL;
+}
+
+void PointLight::updateShadowMap(Scene* scene)
+{
+    glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
+    glViewport(0, 0, m_shadowMapResolution, m_shadowMapResolution);
+    m_shadowMap->bindFBO();
+    glClearDepth(1.0);
+    glClear(GL_DEPTH_BUFFER_BIT);
+    glEnable(GL_DEPTH_TEST);
+    glDepthFunc(GL_LESS);
+    for(SceneIterator<GeometryNode*>* geometryIt = scene->getGeometry();
+        geometryIt->isValid(); geometryIt->next())
+    {
+        GeometryNode* node = geometryIt->getItem();
+        if(node->mesh->getFlags() & (1 << Mesh::MESH_SHADOWED))
+        {
+            int shaderId = (node->mesh->getFlags() & (1 << Mesh::MATERIAL_ALPHA_MASK)) != 0;
+            
+            m_shaders[shaderId]->bind();
+            m_shaders[shaderId]->bindMat4(m_shaders[shaderId]->getLocation("modelMatrix"), node->modelMatrix);
+            m_shaders[shaderId]->bindMat4(m_shaders[shaderId]->getLocation("projectionMatrix"), m_projectionMatrix);
+            m_shaders[shaderId]->bindMat4Array(m_shaders[shaderId]->getLocation("viewMatrices"), m_viewMatrices, 6);
+            m_shaders[shaderId]->bindVec3(m_shaders[shaderId]->getLocation("pointLight"), m_position);
+            node->mesh->draw(m_shaders[shaderId], false, shaderId, false);
+        }
+    }
+}
     
 // OLD IMPLEMENTATION
 

src/light.h

@@ -89,4 +89,37 @@ private:
     static Shader* m_shaders[4];
 };
 
+class PointLight : public Light
+{
+public:
+    PointLight(glm::vec3 pos = glm::vec3(0), float attenuation = 1, glm::vec3 lightColor = glm::vec3(1));
+
+    glm::vec3 getPos() { return m_position; }
+    float getAttenuation() { return m_attenuation; }
+    
+    void setPos(glm::vec3 pos) { m_position = pos; /* TODO : update projection matrix */ }
+    void setAttenuation(float attenuation) { m_attenuation = attenuation; }
+    
+    virtual LightType getType() { return POINT; }
+    virtual void bindAttributes(Shader *shader, Camera *camera);
+    virtual unsigned int getFlags();
+    
+    void initShadowMap(int resolution);
+    void destroyShadowMap();
+    void updateShadowMap(Scene* scene);
+    
+private:
+    glm::vec3 m_position;
+    float m_attenuation;
+    
+    bool m_shadowCaster;
+    int m_shadowMapResolution;
+    FrameBuffer* m_shadowMap;
+    static const glm::mat4 m_viewMatrices[6];
+    glm::mat4 m_projectionMatrix;
+    
+    static int m_shaderRefCounter;
+    static Shader* m_shaders[2];
+};
+
 #endif // LIGHT_H

src/mesh.cpp

@@ -32,7 +32,8 @@ const char* const Mesh::flagStr[Mesh::NB_FLAGS] =
     "BUMP_MAP"
 };
 
-Mesh::Mesh() :
+Mesh::Mesh(const std::string &name) :
+    m_name(name),
     material(NULL),
     isDoubleSided(false),
     isBillboard(false),

src/mesh.h

@@ -3,6 +3,7 @@
 
 #include "opengl.h"
 #include <vector>
+#include <string>
 #include <glm/vec3.hpp>
 #include <glm/vec2.hpp>
 
@@ -86,9 +87,12 @@ public:
     /**
      * @brief Mesh builds an empty mesh, to be renderable, a mesh must have vertices and a material.
      */
-    Mesh();
+    Mesh(const std::string &name = "mesh");
 	~Mesh();
-
+    
+    void setName(const std::string &name) { m_name = name; }
+    std::string getName() { return m_name; }
+    
     /**
      * OpenGL methods :
      * - initGL allocates the GPU buffers and sends the mesh data to the GPU
@@ -206,7 +210,8 @@ public:
     void setPrimitiveType(GLenum type) {primitive_type = type;}
 
 protected:
-
+    std::string m_name;
+    
     Material* material;
     bool isDoubleSided;
     bool isBillboard;

src/parametricmesh.cpp

@@ -8,7 +8,7 @@
 Mesh* MeshGenerator::generateParametricMesh(Material* mat, int width, int height, float size, bool alternate)
 {
     m_size = size;
-    m_mesh = new Mesh();
+    m_mesh = new Mesh("parametric_mesh");
     m_mesh->setMaterial(mat);
     
     for(int i=0; i<=width; ++i)
@@ -46,7 +46,7 @@ Mesh* MeshGenerator::generateParametricMesh(Material* mat, int width, int height
 Mesh* MeshGenerator::generateGeodesicMesh(Material* mat, int n, float size)
 {
     m_size = size;
-    m_mesh = new Mesh();
+    m_mesh = new Mesh("geodesic_mesh");
     m_mesh->setMaterial(mat);
     
     // icosahedron :

src/serializers.cpp

@@ -19,6 +19,7 @@ struct MeshHeader
     int depth;
     int nbInstances_offsets;
     int nbIndices;
+    int nameLength;
 };
 
 struct MaterialHeader
@@ -85,6 +86,7 @@ bool saveMesh(const std::string &filename, Mesh *mesh)
     }
     header.nbIndices = mesh->indices.size();
     header.nbInstances_offsets = mesh->instances_offsets.size();
+    header.nameLength = mesh->getName().size();
     
     // serializing
     bool ok = false;
@@ -99,9 +101,18 @@ bool saveMesh(const std::string &filename, Mesh *mesh)
 bool serializeMesh(Mesh* mesh, const MeshHeader &header, FILE *file)
 {
     // writing header
-    size_t nbWritten = std::fwrite(&header, sizeof(MeshHeader), 1, file);
+    size_t nbWritten;
+    
+    nbWritten = std::fwrite(&header, sizeof(MeshHeader), 1, file);
     if(nbWritten != 1)
         return false;
+    
+    if(header.nameLength != 0)
+    {
+        nbWritten = std::fwrite(mesh->getName().data(), header.nameLength, 1, file);
+        if(nbWritten != 1)
+            return false;
+    }
 
     // writing buffers
     if(header.flags & (1 << Mesh::MESH_3D))
@@ -206,6 +217,15 @@ Mesh* loadMesh(const std::string &filename)
 
 bool deserializeMesh(Mesh* mesh, const MeshHeader &header, FILE *file)
 {
+    std::string name = "mesh";
+    if(header.nameLength != 0)
+    {
+        name.resize(header.nameLength);
+        if(!fread(&(name[0]), header.nameLength, 1, file))
+            return false;
+    }
+    mesh->setName(name);
+    
     if(header.flags & (1 << Mesh::MESH_3D))
     {
         mesh->positions3D.reserve(header.nbPositions);

src/shader.cpp

@@ -162,32 +162,37 @@ void Shader::bindFloat(GLuint location, float val)
     glUniform1f(location, val);
 }
 
-void Shader::bindMat3(GLuint location, glm::mat3 mat)
+void Shader::bindMat3(GLuint location, const glm::mat3 &mat)
 {
     glUniformMatrix3fv(location, 1, GL_FALSE, glm::value_ptr(mat));
 }
 
-void Shader::bindMat4(GLuint location, glm::mat4 mat)
+void Shader::bindMat4(GLuint location, const glm::mat4 &mat)
 {
     glUniformMatrix4fv(location, 1, GL_FALSE, glm::value_ptr(mat));
 }
 
-void Shader::bindVec2(GLuint location, glm::vec2 vec)
+void Shader::bindMat4Array(GLuint location, const glm::mat4 *matrices, int nbMat)
+{
+    glUniformMatrix4fv(location, nbMat, GL_FALSE, (GLfloat*)matrices);
+}
+
+void Shader::bindVec2(GLuint location, const glm::vec2 &vec)
 {
     glUniform2fv(location, 1, glm::value_ptr(vec));
 }
 
-void Shader::bindVec3(GLuint location, glm::vec3 vec)
+void Shader::bindVec3(GLuint location, const glm::vec3 &vec)
 {
     glUniform3fv(location, 1, glm::value_ptr(vec));
 }
 
-void Shader::bindVec4(GLuint location, glm::vec4 vec)
+void Shader::bindVec4(GLuint location, const glm::vec4 &vec)
 {
     glUniform4fv(location, 1, glm::value_ptr(vec));
 }
 
-void Shader::bindVec3Array(GLuint location, glm::vec3* vec, int nb_elements)
+void Shader::bindVec3Array(GLuint location, const glm::vec3* vec, int nb_elements)
 {
     glUniform3fv(location, nb_elements, (GLfloat*)vec);
 }

src/shader.h

@@ -21,12 +21,13 @@ public:
     void bind();
     void unbind();
     void bindFloat(GLuint location, float val);
-    void bindMat3(GLuint location, glm::mat3 mat);
-    void bindMat4(GLuint location, glm::mat4 mat);
-    void bindVec2(GLuint location, glm::vec2 vec);
-    void bindVec3(GLuint location, glm::vec3 vec);
-    void bindVec4(GLuint location, glm::vec4 vec);
-    void bindVec3Array(GLuint location, glm::vec3* vec, int nb_elements);
+    void bindMat3(GLuint location, const glm::mat3 &mat);
+    void bindMat4(GLuint location, const glm::mat4 &mat);
+    void bindMat4Array(GLuint location, const glm::mat4 *matrices, int nbMat);
+    void bindVec2(GLuint location, const glm::vec2 &vec);
+    void bindVec3(GLuint location, const glm::vec3 &vec);
+    void bindVec4(GLuint location, const glm::vec4 &vec);
+    void bindVec3Array(GLuint location, const glm::vec3* vec, int nb_elements);
     void bindUnsignedInteger(GLuint location, GLuint unsigned_integer);
     void bindInteger(GLuint location, GLint integer);
 };