Can add models with multiple textures

core/Ball.cpp

@@ -1,6 +1,8 @@
 #include "Ball.h"
 
 Ball::Ball() {
+  IndexList indices;
+  VertexList vertices;
   // It's a cube really
   // Front
   vertices.push_back(Vertex(1.0f, 1.0f, 1.0f, 0.0f, 1.0f));
@@ -31,5 +33,7 @@ Ball::Ball() {
   // Right side
   indices.push_back(Index(2, 3, 7));
   indices.push_back(Index(2, 6, 7));
+
+  submeshes.push_back(new SubMesh(vertices, indices));
 }
 

core/Mesh.cpp

@@ -1,21 +1,15 @@
 #include "Mesh.h"
 
-Mesh::Mesh() {
+SubMesh::SubMesh() {
   material = new Material();
 }
 
-Mesh::~Mesh() {
-  if (material) {
-    delete material;
-  }
-}
-
-Mesh::Mesh(VertexList vertices, IndexList indices) {
+SubMesh::SubMesh(VertexList vertices, IndexList indices) {
   this->vertices = vertices;
   this->indices = indices;
 }
 
-void Mesh::SetupMesh() {
+void SubMesh::SetupSubMesh() {
   glGenVertexArrays(1, &VAO);
   glGenBuffers(1, &VBO);
   glGenBuffers(1, &EBO);
@@ -40,6 +34,32 @@ void Mesh::SetupMesh() {
   glBindVertexArray(0);
 }
 
+void SubMesh::Draw(Shader *shader) {
+  shader->UpdateColor(material->usesColor, material->color);
+  shader->UpdateTex(material->usesTex, material->tex);
+  glBindVertexArray(VAO);
+  glDrawElements(GL_TRIANGLES, indices.size() * 3, GL_UNSIGNED_INT, 0);
+  glBindVertexArray(0);
+}
+
+Mesh::Mesh() {}
+
+Mesh::~Mesh() {
+  for (SubMesh *sub : submeshes) {
+    delete sub;
+  }
+}
+
+void Mesh::SetupMesh() {
+  for (SubMesh *sub : submeshes) {
+    sub->SetupSubMesh();
+  }
+}
+
+void Mesh::SetMaterial(int submesh, Material *material) {
+  submeshes[submesh]->material = material;
+}
+
 Mesh* Mesh::FromFile(const char *filename) {
   // HOCUS: https://assimp-docs.readthedocs.io/en/latest/usage/use_the_lib.html
   Assimp::Importer importer;
@@ -56,31 +76,34 @@ Mesh* Mesh::FromFile(const char *filename) {
   }
 
   aiNode *root = scene->mRootNode;
-  aiMesh *mesh_to_import = scene->mMeshes[root->mMeshes[0]];
+  Mesh *my_mesh = new Mesh();
+  for (int i = 0; i < root->mNumMeshes; i++) {
+    aiMesh *mesh_to_import = scene->mMeshes[root->mMeshes[i]];
+    my_mesh->submeshes.push_back(aiMesh2SubMesh(mesh_to_import));
+  }
 
-  return aiMesh2Mesh(mesh_to_import);
+  return my_mesh;
 }
 
-Mesh *Mesh::aiMesh2Mesh(aiMesh *aimesh){
-  Mesh *mymesh = new Mesh();
+SubMesh *Mesh::aiMesh2SubMesh(aiMesh *aimesh){
+  SubMesh *sub = new SubMesh();
   for (int i = 0; i < aimesh->mNumVertices; i++) {
     aiVector3D aiPosition = aimesh->mVertices[i];
     aiVector3D aiUV = aimesh->mTextureCoords[0][i]; // TODO get ALL texture coords
     Vertex vertex(aiPosition.x, aiPosition.y, aiPosition.z, aiUV.x, aiUV.y);
-    mymesh->vertices.push_back(vertex);
+    sub->vertices.push_back(vertex);
   }
   for (int i = 0; i < aimesh->mNumFaces; i++) {
     // We're importing triangulated meshes, so each face is three indices
     unsigned int *face = aimesh->mFaces[i].mIndices;
     Index index(face[0], face[1], face[2]);
-    mymesh->indices.push_back(index);
+    sub->indices.push_back(index);
   }
-  return mymesh;
+  return sub;
 }
 
-
-void Mesh::Draw() {
-  glBindVertexArray(VAO);
-  glDrawElements(GL_TRIANGLES, indices.size() * 3, GL_UNSIGNED_INT, 0);
-  glBindVertexArray(0);
+void Mesh::Draw(Shader *shader) {
+  for (SubMesh *sub : submeshes) {
+    sub->Draw(shader);
+  }
 }

core/Mesh.h

@@ -2,8 +2,9 @@
 #define MESH_H
 
 #include <list>
+#include <vector>
 
-// Thirdpart includes
+// Thirdparty includes
 #include <assimp/Importer.hpp>
 #include <assimp/scene.h>
 #include <assimp/postprocess.h>
@@ -15,21 +16,36 @@
 #include "Index.h"
 #include "Material.h"
 
-class Mesh : public Spatial {
+#include "Shaders/Shader.h"
+
+class SubMesh {
 public:
+  SubMesh();
+  SubMesh(VertexList vertices, IndexList indices);
   VertexList vertices;
   IndexList indices;
   Material *material;
-  Mesh();
-  ~Mesh();
-  Mesh(VertexList vertices, IndexList indices);
-  static Mesh *FromFile(const char *filename);
-  virtual bool IsDrawable() const {return true;}
-  virtual void Draw();
-  virtual void SetupMesh();
+  void SetupSubMesh();
+  void Draw(Shader *shader);
 private:
   Id VAO, VBO, EBO;
-  static Mesh *aiMesh2Mesh(aiMesh *mesh);
+};
+
+typedef std::vector<SubMesh*> SubMeshList;
+
+class Mesh : public Spatial {
+public:
+  Mesh();
+  ~Mesh();
+  void SetMaterial(int submesh, Material *material);
+  static Mesh *FromFile(const char *filename);
+  virtual bool IsDrawable() const {return true;}
+  virtual void Draw(Shader *shader);
+  virtual void SetupMesh();
+protected:
+  SubMeshList submeshes;
+private:
+  static SubMesh *aiMesh2SubMesh(aiMesh *mesh);
 };
 
 typedef std::list<Mesh*> MeshList;

core/Shaders/FlatShader.cpp

@@ -3,7 +3,3 @@
 #include "flat.frag.h"
 
 FlatShader::FlatShader() : Shader(flat_vert, flat_frag) {}
-
-void FlatShader::UpdateColor(Vector3 color) {
-  glUniform3f(glGetUniformLocation(id, "color"), color.r, color.g, color.b);
-}

core/Shaders/FlatShader.h

@@ -1,7 +1,12 @@
+#ifndef FLATSHADER_H
+#define FLATSHADER_H
+
 #include "Shader.h"
 
 class FlatShader : public Shader {
 public:
   FlatShader();
-  void UpdateColor(Vector3 color);
 };
+
+#endif /* FLATSHADER_H */
+

core/couch.cpp

@@ -41,17 +41,7 @@ void render(Node *curr, Shader *shader, Matrix model) {
       shader->UpdateModel(model);
     }
     Mesh *mesh = dynamic_cast<Mesh*>(curr);
-    if (mesh->material->usesColor) {
-      shader->UpdateColor(true, mesh->material->color);
-    } else {
-      shader->UpdateColor(false);
-    }
-    if (mesh->material->usesTex) {
-      shader->UpdateTex(true, mesh->material->tex);
-    } else {
-      shader->UpdateTex(false);
-    }
-    mesh->Draw();
+    mesh->Draw(shader);
   }
   for (Node *child : curr->children) {
     render(child, shader, model);   
@@ -85,9 +75,6 @@ int main() {
 
   glViewport(0, 0, width, height);
 
-  glEnable(GL_CULL_FACE);
-  glCullFace(GL_BACK);
-
   root = Node::GetRoot();
 
   Input *input = Input::GetInstance();

demo/main.lua

@@ -24,33 +24,47 @@ local RED = couch.Color(1.0, 0.0, 0.0)
 local BLUE = couch.Color(0.0, 0.0, 1.0)
 
 function init()
+   local material
+   
    camera = couch.Camera()
    camera:MakeCurrent()
    camera.transform:Translate(0.0, 0.0, 10.0)
    ball = couch.Ball()
    ball:SetupMesh()
-   ball.material.color = RED
-   ball.material.usesColor = true
+   material = couch.Material.new()
+   material.color = RED
+   material.usesColor = true
+   ball:SetMaterial(0, material)
    couch.Node.GetRoot().children:Append(ball)
    ball1 = couch.Ball()
    ball1:SetupMesh()
-   ball1.material.tex = couch.Texture.FromFile("container.png")
-   ball1.material.usesTex = true
+   material = couch.Material.new()
+   material.tex = couch.Texture.FromFile("container.png")
+   material.usesTex = true
+   ball1:SetMaterial(0, material)
    couch.Node.GetRoot().children:Append(ball1)
 
    ball1.transform:Translate(0.0, 3.0, 0.0)
 
    trough = couch.Mesh.FromFile("trough.glb")
    trough:SetupMesh()
-   trough.material.tex = couch.Texture.FromFile("wood_lowres.png")
-   trough.material.usesTex = true
+   material = couch.Material.new()
+   material.tex = couch.Texture.FromFile("wood_lowres.png")
+   material.usesTex = true
+   trough:SetMaterial(0, material)
    couch.Node.GetRoot().children:Append(trough)
    trough.transform:Translate(10.0, 0.0, 0.0)
 
    scaffold = couch.Mesh.FromFile("scaffold.glb")
    scaffold:SetupMesh()
-   scaffold.material.tex = couch.Texture.FromFile("grate_floor_lowres.png")
-   scaffold.material.usesTex = true
+   material = couch.Material.new()
+   material.tex = couch.Texture.FromFile("grate_floor_lowres.png")
+   material.usesTex = true
+   scaffold:SetMaterial(0, material)
+   material = couch.Material.new()
+   material.tex = couch.Texture.FromFile("railing.png")
+   material.usesTex = true
+   scaffold:SetMaterial(1, material)
    couch.Node.GetRoot().children:Append(scaffold)
    scaffold.transform:Translate(-10.0, 0.0, 0.0)
 end

scripting/couch.i

@@ -7,12 +7,14 @@
 #include "Node.h"
 #include "Transform.h"
 #include "Spatial.h"
-#include "Material.h"
 #include "Mesh.h"
 #include "Ball.h"
+#include "Material.h"
 #include "Camera.h"
 %}
 
+%rename("%(strip:[script_])s") "";
+
 typedef float cfloat;
 %ignore "cfloat";
 
@@ -21,6 +23,7 @@ public:
   Vector3();
   cfloat x, y, z;
 };
+
 %extend Vector3 {
   Vector3 operator+(const Vector3 &o) const {
     return *$self + o;
@@ -31,12 +34,18 @@ public:
 }
 %ignore "Vector3";
 
+%extend Material {
+  static Material* Material::script_new() {
+    return new Material();
+  }
+}
+
 %include "types.h"
 %include "Node.h"
 %include "Spatial.h"
-%include "Transform.h"
-%include "Material.h"
 %include "Mesh.h"
 %include "Ball.h"
+%include "Transform.h"
+%include "Material.h"
 %include "Camera.h"