Plannnninnnngggg

include/OBJLoaderExample.cpp

@@ -0,0 +1,80 @@
+#define TINYOBJLOADER_IMPLEMENTATION // define this in only *one* .cc
+#include "tiny_obj_loader.h"
+
+std::string inputfile = "cornell_box.obj";
+tinyobj::attrib_t attrib;
+std::vector<tinyobj::shape_t> shapes;
+std::vector<tinyobj::material_t> materials;
+
+std::string warn;
+std::string err;
+bool ret = tinyobj::LoadObj(&attrib, &shapes, &materials, &warn, &err, inputfile.c_str());
+  
+if (!err.empty()) { // `err` may contain warning message.
+  std::cerr << err << std::endl;
+}
+
+if (!ret) {
+  exit(1);
+}
+
+// Loop over shapes
+for (size_t s = 0; s < shapes.size(); s++) {
+  // Loop over faces(polygon)
+  size_t index_offset = 0;
+  for (size_t f = 0; f < shapes[s].mesh.num_face_vertices.size(); f++) {
+    int fv = shapes[s].mesh.num_face_vertices[f];
+
+    // Loop over vertices in the face.
+    for (size_t v = 0; v < fv; v++) {
+      // access to vertex
+      tinyobj::index_t idx = shapes[s].mesh.indices[index_offset + v];
+      tinyobj::real_t vx = attrib.vertices[3*idx.vertex_index+0];
+      tinyobj::real_t vy = attrib.vertices[3*idx.vertex_index+1];
+      tinyobj::real_t vz = attrib.vertices[3*idx.vertex_index+2];
+      tinyobj::real_t nx = attrib.normals[3*idx.normal_index+0];
+      tinyobj::real_t ny = attrib.normals[3*idx.normal_index+1];
+      tinyobj::real_t nz = attrib.normals[3*idx.normal_index+2];
+      tinyobj::real_t tx = attrib.texcoords[2*idx.texcoord_index+0];
+      tinyobj::real_t ty = attrib.texcoords[2*idx.texcoord_index+1];
+      // Optional: vertex colors
+      // tinyobj::real_t red = attrib.colors[3*idx.vertex_index+0];
+      // tinyobj::real_t green = attrib.colors[3*idx.vertex_index+1];
+      // tinyobj::real_t blue = attrib.colors[3*idx.vertex_index+2];
+    }
+    index_offset += fv;
+
+    // per-face material
+    shapes[s].mesh.material_ids[f];
+  }
+}
+
+/**
+ * attrib_t::vertices => 3 floats per vertex
+
+       v[0]        v[1]        v[2]        v[3]               v[n-1]
+  +-----------+-----------+-----------+-----------+      +-----------+
+  | x | y | z | x | y | z | x | y | z | x | y | z | .... | x | y | z |
+  +-----------+-----------+-----------+-----------+      +-----------+
+
+attrib_t::normals => 3 floats per vertex
+
+       n[0]        n[1]        n[2]        n[3]               n[n-1]
+  +-----------+-----------+-----------+-----------+      +-----------+
+  | x | y | z | x | y | z | x | y | z | x | y | z | .... | x | y | z |
+  +-----------+-----------+-----------+-----------+      +-----------+
+
+attrib_t::texcoords => 2 floats per vertex
+
+       t[0]        t[1]        t[2]        t[3]               t[n-1]
+  +-----------+-----------+-----------+-----------+      +-----------+
+  |  u  |  v  |  u  |  v  |  u  |  v  |  u  |  v  | .... |  u  |  v  |
+  +-----------+-----------+-----------+-----------+      +-----------+
+
+attrib_t::colors => 3 floats per vertex(vertex color. optional)
+
+       c[0]        c[1]        c[2]        c[3]               c[n-1]
+  +-----------+-----------+-----------+-----------+      +-----------+
+  | x | y | z | x | y | z | x | y | z | x | y | z | .... | x | y | z |
+  +-----------+-----------+-----------+-----------+      +-----------+
+/*