Explicit casts and initializations to glm::vec3

Added explicit casts to glm::vec3 from glm::vec4 as it was causing
build errors with clang 3.9.1 on OS X.

Changed assignment operation to initialization for ray_origin.

include/eos/fitting/closest_edge_fitting.hpp

@@ -131,7 +131,7 @@ inline std::vector<int> occluding_boundary_vertices(const core::Mesh& mesh, cons
 	// Compute the face normals of the rotated mesh:
 	std::vector<glm::vec3> facenormals;
 	for (auto&& f : mesh.tvi) { // for each face (triangle):
-		auto n = render::compute_face_normal(rotated_vertices[f[0]], rotated_vertices[f[1]], rotated_vertices[f[2]]);
+		auto n = render::compute_face_normal(glm::vec3(rotated_vertices[f[0]]), glm::vec3(rotated_vertices[f[1]]), glm::vec3(rotated_vertices[f[2]]));
 		facenormals.push_back(n);
 	}
 
@@ -180,7 +180,7 @@ inline std::vector<int> occluding_boundary_vertices(const core::Mesh& mesh, cons
 			auto& v1 = rotated_vertices[tri[1]];
 			auto& v2 = rotated_vertices[tri[2]];
 
-			glm::vec3 ray_origin = rotated_vertices[vertex_idx];
+			glm::vec3 ray_origin(rotated_vertices[vertex_idx]);
 			glm::vec3 ray_direction(0.0f, 0.0f, 1.0f); // we shoot the ray from the vertex towards the camera
 			auto intersect = ray_triangle_intersect(ray_origin, ray_direction, glm::vec3(v0), glm::vec3(v1), glm::vec3(v2), false);
 			// first is bool intersect, second is the distance t

include/eos/render/texture_extraction.hpp

@@ -408,7 +408,7 @@ cv::Mat extract_texture(core::Mesh mesh, glm::mat4x4 view_model_matrix, glm::mat
             auto& v1 = rotated_vertices[tri[1]];
             auto& v2 = rotated_vertices[tri[2]];
 
-            vec3 ray_origin = vertex;
+            vec3 ray_origin(vertex);
             vec3 ray_direction(0.0f, 0.0f, 1.0f); // we shoot the ray from the vertex towards the camera
             auto intersect = fitting::ray_triangle_intersect(ray_origin, ray_direction, vec3(v0), vec3(v1),
                                                              vec3(v2), false);