OBJ loader rewritten in C

9 files changed, 424 insertions, 336 deletions

diff --git a/Spear.cabal b/Spear.cabal
index d30cbae..37ab48b 100644
--- a/Spear.cabal
+++ b/Spear.cabal
@@ -42,15 +42,16 @@ library
     cc-options: -O2 -g -Wno-unused-result
     c-sources: Spear/Assets/Image/Image.c
                Spear/Assets/Image/BMP/BMP_load.c Spear/Assets/Model/Model.c
-               Spear/Assets/Model/MD2/MD2_load.c
-               Spear/Assets/Model/OBJ/OBJ_load.cc Spear/Render/RenderModel.c
+               Spear/Assets/Model/MD2/MD2_load.c Spear/Assets/Model/OBJ/cvector.c
+               Spear/Assets/Model/OBJ/OBJ_load.c Spear/Render/RenderModel.c
                Spear/Sys/Timer/ctimer.c
     extensions: TypeFamilies
     extra-libraries: stdc++
     includes: Spear/Assets/Image/BMP/BMP_load.h
               Spear/Assets/Image/Image.h Spear/Assets/Image/Image_error_code.h
               Spear/Assets/Image/sys_types.h Spear/Assets/Model/MD2/MD2_load.h
-              Spear/Assets/Model/OBJ/OBJ_load.h Spear/Assets/Model/Model.h
+              Spear/Assets/Model/OBJ/OBJ_load.h Spear/Assets/Model/OBJ/cvector.h
+              Spear/Assets/Model/Model.h
               Spear/Assets/Model/Model_error_code.h
               Spear/Assets/Model/sys_types.h Spear/Render/RenderModel.h
               Timer/Timer.h
diff --git a/Spear.lkshs b/Spear.lkshs
index d69e4f9..c4ef8ee 100644
--- a/Spear.lkshs
+++ b/Spear.lkshs
@@ -1,18 +1,18 @@
 Version of session file format:
                1
 Time of storage:
-               "Fri Aug 10 15:19:04 CEST 2012"
-Layout:        VerticalP (TerminalP {paneGroups = fromList [], paneTabs = Just TopP, currentPage = 4, detachedId = Nothing, detachedSize = Nothing}) (HorizontalP (TerminalP {paneGroups = fromList [("Browser",HorizontalP (TerminalP {paneGroups = fromList [], paneTabs = Nothing, currentPage = 0, detachedId = Nothing, detachedSize = Nothing}) (HorizontalP (TerminalP {paneGroups = fromList [], paneTabs = Nothing, currentPage = 0, detachedId = Nothing, detachedSize = Nothing}) (TerminalP {paneGroups = fromList [], paneTabs = Nothing, currentPage = 0, detachedId = Nothing, detachedSize = Nothing}) 255) 201)], paneTabs = Just BottomP, currentPage = 0, detachedId = Nothing, detachedSize = Nothing}) (TerminalP {paneGroups = fromList [], paneTabs = Nothing, currentPage = 0, detachedId = Nothing, detachedSize = Nothing}) 707) 954
-Population:    [(Just (ErrorsSt ErrorsState),[SplitP RightP,SplitP TopP]),(Just (FilesSt FilesState),[SplitP RightP,SplitP TopP]),(Just (InfoSt (InfoState Nothing)),[SplitP RightP,SplitP TopP,GroupP "Browser",SplitP BottomP,SplitP BottomP]),(Just (BufferSt (BufferState "/home/jeanne/programming/haskell/Spear/Spear/Scene/Loader.hs" 6686)),[SplitP LeftP]),(Just (LogSt LogState),[SplitP RightP,SplitP BottomP]),(Just (BufferSt (BufferState "/home/jeanne/programming/haskell/Spear/Spear/Assets/Model/MD2/MD2_load.c" 13934)),[SplitP LeftP]),(Just (BufferSt (BufferState "/home/jeanne/programming/haskell/Spear/Spear/Assets/Model/Model.c" 433)),[SplitP LeftP]),(Just (BufferSt (BufferState "/home/jeanne/programming/haskell/Spear/Spear/Assets/Model/Model.h" 1424)),[SplitP LeftP]),(Just (BufferSt (BufferState "/home/jeanne/programming/haskell/Spear/Spear/Assets/Model.hsc" 12957)),[SplitP LeftP]),(Just (ModulesSt (ModulesState 328 (PackageScope False,False) (Nothing,Nothing) (ExpanderState {packageExp = ([],[]), packageExpNoBlack = ([],[]), packageDExp = ([],[]), packageDExpNoBlack = ([],[]), workspaceExp = ([],[]), workspaceExpNoBlack = ([[0,2],[0]],[]), workspaceDExp = ([],[]), workspaceDExpNoBlack = ([],[]), systemExp = ([],[]), systemExpNoBlack = ([],[])}))),[SplitP RightP,SplitP TopP,GroupP "Browser",SplitP BottomP,SplitP TopP]),(Just (BufferSt (BufferState "/home/jeanne/programming/haskell/Spear/Spear/Assets/Model/OBJ/OBJ_load.cc" 266)),[SplitP LeftP]),(Just (BufferSt (BufferState "/home/jeanne/programming/haskell/Spear/Spear/Assets/Model/OBJ/OBJ_load.h" 0)),[SplitP LeftP]),(Just (WorkspaceSt WorkspaceState),[SplitP RightP,SplitP TopP,GroupP "Browser",SplitP TopP])]
+               "Fri Aug 10 23:05:26 CEST 2012"
+Layout:        VerticalP (TerminalP {paneGroups = fromList [], paneTabs = Just TopP, currentPage = 3, detachedId = Nothing, detachedSize = Nothing}) (HorizontalP (TerminalP {paneGroups = fromList [("Browser",HorizontalP (TerminalP {paneGroups = fromList [], paneTabs = Nothing, currentPage = 0, detachedId = Nothing, detachedSize = Nothing}) (HorizontalP (TerminalP {paneGroups = fromList [], paneTabs = Nothing, currentPage = 0, detachedId = Nothing, detachedSize = Nothing}) (TerminalP {paneGroups = fromList [], paneTabs = Nothing, currentPage = 0, detachedId = Nothing, detachedSize = Nothing}) 244) 202)], paneTabs = Just BottomP, currentPage = 0, detachedId = Nothing, detachedSize = Nothing}) (TerminalP {paneGroups = fromList [], paneTabs = Nothing, currentPage = 0, detachedId = Nothing, detachedSize = Nothing}) 710) 954
+Population:    [(Just (ErrorsSt ErrorsState),[SplitP RightP,SplitP TopP]),(Just (FilesSt FilesState),[SplitP RightP,SplitP TopP]),(Just (InfoSt (InfoState Nothing)),[SplitP RightP,SplitP TopP,GroupP "Browser",SplitP BottomP,SplitP BottomP]),(Just (LogSt LogState),[SplitP RightP,SplitP BottomP]),(Just (BufferSt (BufferState "/home/jeanne/programming/haskell/Spear/Spear/Assets/Model/Model.c" 433)),[SplitP LeftP]),(Just (BufferSt (BufferState "/home/jeanne/programming/haskell/Spear/Spear/Assets/Model/Model.h" 1424)),[SplitP LeftP]),(Just (BufferSt (BufferState "/home/jeanne/programming/haskell/Spear/Spear/Assets/Model.hsc" 423)),[SplitP LeftP]),(Just (ModulesSt (ModulesState 328 (PackageScope False,False) (Nothing,Nothing) (ExpanderState {packageExp = ([],[]), packageExpNoBlack = ([],[]), packageDExp = ([],[]), packageDExpNoBlack = ([],[]), workspaceExp = ([],[]), workspaceExpNoBlack = ([[0,2],[0]],[]), workspaceDExp = ([],[]), workspaceDExpNoBlack = ([],[]), systemExp = ([],[]), systemExpNoBlack = ([],[])}))),[SplitP RightP,SplitP TopP,GroupP "Browser",SplitP BottomP,SplitP TopP]),(Just (BufferSt (BufferState "/home/jeanne/programming/haskell/Spear/Spear/Assets/Model/OBJ/OBJ_load.c" 3824)),[SplitP LeftP]),(Just (BufferSt (BufferState "/home/jeanne/programming/haskell/Spear/Spear/Assets/Model/OBJ/OBJ_load.h" 0)),[SplitP LeftP]),(Just (WorkspaceSt WorkspaceState),[SplitP RightP,SplitP TopP,GroupP "Browser",SplitP TopP]),(Just (BufferSt (BufferState "/home/jeanne/programming/haskell/Spear/Spear/Assets/Model/OBJ/cvector.c" 575)),[SplitP LeftP]),(Just (BufferSt (BufferState "/home/jeanne/programming/haskell/Spear/Spear/Assets/Model/OBJ/cvector.h" 765)),[SplitP LeftP])]
 Window size:   (1841,964)
 Completion size:
                (750,400)
 Workspace:     Just "/home/jeanne/programming/haskell/Spear/Spear.lkshw"
-Active pane:   Just "Model.hsc"
+Active pane:   Just "OBJ_load.c"
 Toolbar visible:
                True
-FindbarState:  (False,FindState {entryStr = "asd", entryHist = ["allocaBytes","copyArray","allocaArray","allocaa","putStrLn","assigned","Triangle","transforma","gravity","asdad","rotSpeed","azimuth"], replaceStr = "objects", replaceHist = [], caseSensitive = True, entireWord = False, wrapAround = False, regex = False, lineNr = 1})
+FindbarState:  (False,FindState {entryStr = "asd", entryHist = ["idxs","asd","elemIndexa","elemtIn","splitAt","allocaBytes","copyArray","allocaArray","allocaa","putStrLn","assigned","Triangle"], replaceStr = "objects", replaceHist = [], caseSensitive = True, entireWord = False, wrapAround = False, regex = False, lineNr = 1})
 Recently opened files:
-               ["/home/jeanne/programming/haskell/Spear/Spear/Assets/Image.hsc","/home/jeanne/programming/haskell/Spear/Spear/Render/Model.hsc","/home/jeanne/programming/haskell/Spear/demos/simple-scene/main.hs","/home/jeanne/programming/haskell/Spear/demos/simple-scene/Game/GameObject/Player.hs","/home/jeanne/programming/haskell/Spear/demos/simple-scene/Game/GameState.hs","/home/jeanne/programming/haskell/Spear/demos/simple-scene/Game/GameObject.hs","/home/jeanne/programming/haskell/Spear/demos/simple-scene/Game/GameMessage.hs","/home/jeanne/programming/haskell/Spear/demos/simple-scene/Game/GameObject/Factory.hs","/home/jeanne/programming/haskell/Spear/demos/simple-scene/Game/Animation/Ogro.hs","/home/jeanne/programming/haskell/Spear/demos/simple-scene/Game/GameObject/AnimatedGO.hs","/home/jeanne/programming/haskell/Spear/demos/simple-scene/Game/GameObject/StaticGO.hs","/home/jeanne/programming/haskell/Spear/demos/simple-scene/Game/GameObject/Render.hs"]
+               ["/home/jeanne/programming/haskell/Spear/Spear/Scene/Loader.hs","/home/jeanne/programming/haskell/Spear/Spear/Assets/Model/OBJ/OBJ_load.h","/home/jeanne/programming/haskell/Spear/Spear/Assets/Model/OBJ/OBJ_load.cc","/home/jeanne/programming/haskell/Spear/Spear/Assets/Model/MD2/MD2_load.c","/home/jeanne/programming/haskell/Spear/Spear/Assets/Image.hsc","/home/jeanne/programming/haskell/Spear/Spear/Render/Model.hsc","/home/jeanne/programming/haskell/Spear/demos/simple-scene/main.hs","/home/jeanne/programming/haskell/Spear/demos/simple-scene/Game/GameObject/Player.hs","/home/jeanne/programming/haskell/Spear/demos/simple-scene/Game/GameState.hs","/home/jeanne/programming/haskell/Spear/demos/simple-scene/Game/GameObject.hs","/home/jeanne/programming/haskell/Spear/demos/simple-scene/Game/GameMessage.hs","/home/jeanne/programming/haskell/Spear/demos/simple-scene/Game/GameObject/Factory.hs"]
 Recently opened workspaces:
                ["/home/jeanne/leksah.lkshw"]
\ No newline at end of file
diff --git a/Spear.lkshw b/Spear.lkshw
index 143acdc..1cbf39e 100644
--- a/Spear.lkshw
+++ b/Spear.lkshw
@@ -1,7 +1,7 @@
 Version of workspace file format:
                1
 Time of storage:
-               "Fri Aug 10 15:56:20 CEST 2012"
+               "Sat Aug 11 11:39:35 CEST 2012"
 Name of the workspace:
                "Spear"
 File paths of contained packages:
diff --git a/Spear/Assets/Model/OBJ/Makefile b/Spear/Assets/Model/OBJ/Makefile
index 6f9556f..34424f7 100644
--- a/Spear/Assets/Model/OBJ/Makefile
+++ b/Spear/Assets/Model/OBJ/Makefile
@@ -1,10 +1,15 @@
-all: OBJ_load.h OBJ_load.cc test.cc ../Model.c
-        g++ -g -c OBJ_load.cc
-        g++ -g -c test.cc
-        g++ -g -c ../Model.c -o Model.o
-        g++ -o test *.o
+test: ../Model.o OBJ_load.o cvector.o test.o
+        $(CC) Model.o OBJ_load.o cvector.o test.o -o $@ -lm
+
+vector: cvector.o vector-test.o
+        $(CC) cvector.o vector-test.o -o vector
+        
+
+%.o: %.c %.h
+        $(CC) -g -c $<
+
 
 clean:
-        @rm -f test
+        @rm -f test vector
         @rm -f *.o
         
diff --git a/Spear/Assets/Model/OBJ/OBJ_load.c b/Spear/Assets/Model/OBJ/OBJ_load.c
new file mode 100644
index 0000000..2474091
--- /dev/null
+++ b/Spear/Assets/Model/OBJ/OBJ_load.c
@@ -0,0 +1,276 @@
+#include "OBJ_load.h"
+#include "cvector.h"
+#include <stdio.h>
+#include <stdlib.h> // free
+#include <string.h> // memcpy
+#include <math.h> // sqrt
+
+
+char lastError [128];
+
+
+static void safe_free (void* ptr)
+{
+    if (ptr)
+    {
+        free (ptr);
+        ptr = 0;
+    }
+}
+
+
+// Cross product.
+// (0,1,0) x (1,0,0) = (0,0,-1).
+static void cross (vec3 a, vec3 b, vec3* c)
+{
+    c->x = a.y * b.z - a.z * b.y;
+    c->y = a.z * b.x - a.x * b.z;
+    c->z = a.x * b.y - a.y * b.x;
+}
+
+
+static void vec3_sub (vec3 a, vec3 b, vec3* out)
+{
+    out->x = a.x - b.x;
+    out->y = a.y - b.y;
+    out->z = a.z - b.z;
+}
+
+
+static void compute_normal (char clockwise, vec3 p1, vec3 p2, vec3 p3, vec3* n)
+{
+    vec3 v1, v2;
+    if (clockwise)
+    {
+        vec3_sub (p3, p2, &v1);
+        vec3_sub (p1, p2, &v2);
+    }
+    else
+    {
+        vec3_sub (p1, p2, &v1);
+        vec3_sub (p3, p2, &v2);
+    }
+    cross (v1, v2, n);
+}
+
+
+static void normalise (vec3* v)
+{
+    float x = v->x;
+    float y = v->y;
+    float z = v->z;
+    float mag = sqrt (x*x + y*y + z*z);
+    mag = mag == 0.0f ? 1.0f : mag;
+    v->x /= mag;
+    v->y /= mag;
+    v->z /= mag;
+}
+
+
+static void vec3_add (vec3 a, vec3* b)
+{
+    b->x += a.x;
+    b->y += a.y;
+    b->z += a.z;
+}
+
+
+static void read_vertex (FILE* file, vec3* vert)
+{
+    fscanf (file, "%f %f", &vert->x, &vert->y);
+    if (fscanf(file, "%f", &vert->z) == 0) vert->z = 0.0f;
+}
+
+
+static void read_normal (FILE* file, vec3* normal)
+{
+    fscanf (file, "%f %f %f", &normal->x, &normal->y, &normal->z);
+}
+
+
+static void read_tex_coord (FILE* file, texCoord* texc)
+{
+    fscanf (file, "%f %f", &texc->s, &texc->t);
+}
+
+
+static void read_face (FILE* file,
+                       char clockwise,
+                       vector* vertices,
+                       vector* normals,
+                       vector* triangles)
+{
+    vector idxs;
+    vector texCoords;
+    
+    vector_new (&idxs, sizeof(int), 4);
+    vector_new (&texCoords, sizeof(int), 4);
+    
+    unsigned int index;
+    unsigned int normal;
+    unsigned int texc;
+    
+    fscanf (file, "f");
+    
+    while (!feof(file) && fscanf(file, "%d", &index) > 0)
+    {
+        vector_append (&idxs, &index);
+        
+        if (fgetc (file) == '/')
+        {
+            fscanf (file, "%d", &texc);
+            vector_append (&texCoords, &texc);
+        }
+        else fseek (file, -1, SEEK_CUR);
+        
+        if (fgetc (file) == '/')
+        {
+            fscanf (file, "%d", &normal);
+        }
+        else fseek (file, -1, SEEK_CUR);
+    }
+    
+    // Triangulate the face and add its triangles to the triangles vector.
+    triangle tri;
+    tri.vertexIndices[0]  = *((int*) vector_ith (&idxs, 0)) - 1;
+    tri.textureIndices[0] = *((int*) vector_ith (&texCoords, 0)) - 1;
+    
+    int i;
+    for (i = 1; i < vector_size(&idxs)-1; i++)
+    {
+        tri.vertexIndices[1]  = *((int*) vector_ith (&idxs, i)) - 1;
+        tri.textureIndices[1] = *((int*) vector_ith (&texCoords, i)) - 1;
+        tri.vertexIndices[2]  = *((int*) vector_ith (&idxs, i+1)) - 1;
+        tri.textureIndices[2] = *((int*) vector_ith (&texCoords, i+1)) - 1;
+        vector_append (triangles, &tri);
+    }
+    
+    // Compute face normal and add contribution to each of the face's vertices.
+    unsigned int i0 = tri.vertexIndices[0];
+    unsigned int i1 = tri.vertexIndices[1];
+    unsigned int i2 = tri.vertexIndices[2];
+    
+    vec3 n;
+    vec3 v0 = *((vec3*) vector_ith (vertices, i0));
+    vec3 v1 = *((vec3*) vector_ith (vertices, i1));
+    vec3 v2 = *((vec3*) vector_ith (vertices, i2));
+    compute_normal (clockwise, v0, v1, v2, &n);
+    
+    for (i = 0; i < vector_size (&idxs); i++)
+    {
+        int j = *((int*) vector_ith (&idxs, i)) - 1;
+        vec3* normal = (vec3*) vector_ith (normals, j);
+        vec3_add (n, normal);
+    }
+    
+    vector_free (&idxs);
+    vector_free (&texCoords);
+}
+
+
+Model_error_code OBJ_load (const char* filename, char clockwise, char left_handed, Model* model)
+{
+    vec3* norms     = 0;
+    vec3* verts     = 0;
+    texCoord* texcs = 0;
+    triangle* tris  = 0;
+    
+    FILE* file = fopen (filename, "r");
+    if (file == NULL) return Model_File_Not_Found;
+    
+    vec3 vert;
+    vec3 normal;
+    texCoord texc;
+    
+    vector vertices;
+    vector normals;
+    vector texCoords;
+    vector triangles;
+    
+    int result = vector_new (&vertices,  sizeof(vec3),     0)
+               | vector_new (&normals,   sizeof(vec3),     0)
+               | vector_new (&texCoords, sizeof(texCoord), 0)
+               | vector_new (&triangles, sizeof(triangle), 0);
+    
+    if (result != 0)
+    {
+        safe_free (vertices.data);
+        safe_free (normals.data);
+        safe_free (texCoords.data);
+        safe_free (triangles.data);
+        return Model_Memory_Allocation_Error;
+    }
+    
+    while (!feof(file))
+    {
+        switch (fgetc(file))
+        {
+        case 'v':
+            switch (fgetc(file))
+            {
+            case 't':
+                read_tex_coord (file, &texc);
+                vector_append (&texCoords, &texc);
+                break;
+                
+            case 'n':
+                read_normal (file, &normal);
+                vector_append (&normals, &normal);
+                break;
+                
+            default:
+                read_vertex (file, &vert);
+                vector_append (&vertices, &vert);
+                break;
+            }
+            break;
+            
+        case 'f':
+            // Initialise the normals vector if it is empty.
+            if (vector_size(&normals) == 0)
+            {
+                vec3 zero;
+                zero.x = 0.0f; zero.y = 0.0f; zero.z = 0.0f;
+                vector_new (&normals, sizeof(vec3), vector_size(&vertices));
+                vector_initialise (&normals, &zero);
+            }
+            read_face (file, clockwise, &vertices, &normals, &triangles);
+            break;
+        
+        case '#':
+        {
+            int x = 17;
+            while (x != '\n' && x != EOF) x = fgetc(file);
+            break;
+        }
+            
+        default: break;
+        }
+    }
+    
+    fclose (file);
+    
+    unsigned numVertices = vector_size (&vertices);
+    
+    // Normalise normals.
+    unsigned i;
+    for (i = 0; i < numVertices; ++i)
+    {
+        normalise (vector_ith (&normals, i));
+    }
+    
+    model->vertices      = (vec3*) vertices.data;
+    model->normals       = (vec3*) normals.data;
+    model->texCoords     = (texCoord*) texCoords.data;
+    model->triangles     = (triangle*) triangles.data;
+    model->skins         = 0;
+    model->animations    = 0;
+    model->numFrames     = 1;
+    model->numVertices   = numVertices;
+    model->numTriangles  = vector_size (&triangles);
+    model->numTexCoords  = vector_size (&texCoords);
+    model->numSkins      = 0;
+    model->numAnimations = 0;
+    
+    return Model_Success;
+}
diff --git a/Spear/Assets/Model/OBJ/OBJ_load.cc b/Spear/Assets/Model/OBJ/OBJ_load.cc
deleted file mode 100644
index bf409b1..0000000
--- a/Spear/Assets/Model/OBJ/OBJ_load.cc
+++ /dev/null
@@ -1,273 +0,0 @@
-#include "OBJ_load.h"
-#include <cstdio>
-#include <cstdlib> // free
-#include <cstring> // memcpy
-#include <cmath> // sqrt
-#include <vector>
-
-
-char lastError [128];
-
-
-static void safe_free (void* ptr)
-{
-    if (ptr)
-    {
-        free (ptr);
-        ptr = 0;
-    }
-}
-
-
-// Cross product.
-// (0,1,0) x (1,0,0) = (0,0,-1).
-static void cross (const vec3& a, const vec3& b, vec3& c)
-{
-    c.x = a.y * b.z - a.z * b.y;
-    c.y = a.z * b.x - a.x * b.z;
-    c.z = a.x * b.y - a.y * b.x;
-}
-
-
-static void vec3_sub (const vec3& a, const vec3& b, vec3& out)
-{
-    out.x = a.x - b.x;
-    out.y = a.y - b.y;
-    out.z = a.z - b.z;
-}
-
-
-static void compute_normal (char clockwise, const vec3& p1, const vec3& p2, const vec3& p3, vec3& n)
-{
-    vec3 v1, v2;
-    if (clockwise)
-    {
-        vec3_sub (p3, p2, v1);
-        vec3_sub (p1, p2, v2);
-    }
-    else
-    {
-        vec3_sub (p1, p2, v1);
-        vec3_sub (p3, p2, v2);
-    }
-    cross (v1, v2, n);
-}
-
-
-static void normalise (vec3& v)
-{
-    float x = v.x;
-    float y = v.y;
-    float z = v.z;
-    float mag = sqrt (x*x + y*y + z*z);
-    mag = mag == 0.0f ? 1.0f : mag;
-    v.x /= mag;
-    v.y /= mag;
-    v.z /= mag;
-}
-
-
-static void vec3_add (const vec3& a, vec3& b)
-{
-    b.x += a.x;
-    b.y += a.y;
-    b.z += a.z;
-}
-
-
-static void read_vertex (FILE* file, vec3& vert)
-{
-    fscanf (file, "%f %f", &vert.x, &vert.y);
-    if (fscanf(file, "%f", &vert.z) == 0) vert.z = 0.0f;
-}
-
-
-static void read_normal (FILE* file, vec3& normal)
-{
-    fscanf (file, "%f %f %f", &normal.x, &normal.y, &normal.z);
-}
-
-
-static void read_tex_coord (FILE* file, texCoord& texc)
-{
-    fscanf (file, "%f %f", &texc.s, &texc.t);
-}
-
-
-static void read_face (FILE* file, char clockwise,
-                       const std::vector<vec3>& vertices,
-                       std::vector<vec3>& normals,
-                       std::vector<triangle>& triangles)
-{
-    std::vector<unsigned int> idxs;
-    std::vector<unsigned int> texCoords;
-    
-    unsigned int index;
-    unsigned int normal;
-    unsigned int texc;
-    
-    fscanf (file, "f");
-    
-    while (!feof(file) && fscanf(file, "%d", &index) > 0)
-    {
-        idxs.push_back(index);
-        
-        if (fgetc (file) == '/')
-        {
-            fscanf (file, "%d", &texc);
-            texCoords.push_back(texc);
-        }
-        else fseek (file, -1, SEEK_CUR);
-        
-        if (fgetc (file) == '/')
-        {
-            fscanf (file, "%d", &normal);
-        }
-        else fseek (file, -1, SEEK_CUR);
-    }
-    
-    // Triangulate the face and add its triangles to the triangles vector.
-    triangle tri;
-    tri.vertexIndices[0] = idxs[0] - 1;
-    tri.textureIndices[0] = texCoords[0] - 1;
-    
-    for (int i = 1; i < idxs.size()-1; i++)
-    {
-        tri.vertexIndices[1]  = idxs[i] - 1;
-        tri.textureIndices[1] = texCoords[i] - 1;
-        tri.vertexIndices[2]  = idxs[i+1] - 1;
-        tri.textureIndices[2] = texCoords[i+1] - 1;
-        triangles.push_back(tri);
-    }
-    
-    // Compute face normal and add contribution to each of the face's vertices.
-    unsigned int i0 = tri.vertexIndices[0];
-    unsigned int i1 = tri.vertexIndices[1];
-    unsigned int i2 = tri.vertexIndices[2];
-    
-    vec3 n;
-    compute_normal (clockwise, vertices[i0], vertices[i1], vertices[i2], n);
-    
-    for (int i = 0; i < idxs.size(); i++)
-    {
-        vec3_add (n, normals[idxs[i]-1]);
-    }
-}
-
-
-Model_error_code OBJ_load (const char* filename, char clockwise, char left_handed, Model* model)
-{
-    vec3* norms     = 0;
-    vec3* verts     = 0;
-    texCoord* texcs = 0;
-    triangle* tris  = 0;
-    FILE* file      = 0;
-    
-    try
-    {
-        file = fopen (filename, "r");
-        
-        vec3 vert;
-        vec3 normal;
-        texCoord texc;
-        
-        std::vector<vec3>     vertices;
-        std::vector<vec3>     normals;
-        std::vector<texCoord> texCoords;
-        std::vector<triangle> triangles;
-        
-        while (!feof(file))
-        {
-            switch (fgetc(file))
-            {
-            case 'v':
-                switch (fgetc(file))
-                {
-                case 't':
-                    read_tex_coord (file, texc);
-                    texCoords.push_back(texc);
-                    break;
-                    
-                case 'n':
-                    read_normal (file, normal);
-                    break;
-                    
-                default:
-                    read_vertex (file, vert);
-                    vertices.push_back(vert);
-                    break;
-                }
-                break;
-                
-            case 'f':
-                // If the normals vector has no size, initialise it.
-                if (normals.size() == 0)
-                {
-                    vec3 zero;
-                    zero.x = 0.0f; zero.y = 0.0f; zero.z = 0.0f;
-                    normals = std::vector<vec3>(vertices.size(), zero);
-                }
-                read_face (file, clockwise, vertices, normals, triangles);
-                break;
-            
-            case '#':
-            {
-                int x = 17;
-                while (x != '\n' && x != EOF) x = fgetc(file);
-                break;
-            }
-                
-            default: break;
-            }
-        }
-        
-        fclose (file);
-        
-        unsigned int numVertices  = vertices.size();
-        unsigned int numTexCoords = texCoords.size();
-        unsigned int numTriangles = triangles.size();
-        
-        verts = new vec3 [numVertices];
-        norms = new vec3 [numVertices];
-        texcs = new texCoord [numTexCoords];
-        tris  = new triangle [numTriangles];
-        
-        memcpy (verts, &vertices[0],  numVertices  * sizeof(vec3));
-        memcpy (norms, &normals[0],   numVertices  * sizeof(vec3));
-        memcpy (texcs, &texCoords[0], numTexCoords * sizeof(texCoord));
-        memcpy (tris,  &triangles[0], numTriangles * sizeof(triangle));
-        
-        // Copy normals if the model file specified them.
-        
-        
-        
-        // Otherwise normalise the normals that have been previously computed.
-        
-        for (size_t i = 0; i < numVertices; ++i)
-        {
-            normalise(norms[i]);
-        }
-        
-        model->vertices      = verts;
-        model->normals       = norms;
-        model->texCoords     = texcs;
-        model->triangles     = tris;
-        model->skins         = 0;
-        model->animations    = 0;
-        model->numFrames     = 1;
-        model->numVertices   = numVertices;
-        model->numTriangles  = numTriangles;
-        model->numTexCoords  = numTexCoords;
-        model->numSkins      = 0;
-        model->numAnimations = 0;
-        
-        return Model_Success;
-    }
-    catch (std::bad_alloc)
-    {
-        safe_free (verts);
-        safe_free (texcs);
-        safe_free (tris);
-        return Model_Memory_Allocation_Error;
-    }
-}
diff --git a/Spear/Assets/Model/OBJ/cvector.c b/Spear/Assets/Model/OBJ/cvector.c
new file mode 100644
index 0000000..4e90204
--- /dev/null
+++ b/Spear/Assets/Model/OBJ/cvector.c
@@ -0,0 +1,90 @@
+#include "cvector.h"
+#include <stdlib.h> // malloc, realloc, free
+#include <string.h> // memcpy
+
+
+int max (int a, int b)
+{
+    if (a > b) return a;
+    return b;
+}
+
+
+int vector_new (vector* v, int elem_size, int num_elems)
+{
+    int n = num_elems * elem_size;
+    
+    char* data = 0;
+    if (num_elems > 0)
+    {
+        data = (char*) malloc (n);
+        if (data == NULL) return 1;
+    }
+    
+    v->data       = data;
+    v->next       = data;
+    v->chunk_size = n;
+    v->elem_size  = elem_size;
+    
+    return 0;
+}
+
+
+void vector_free (vector* v)
+{
+    if (v->data != 0) free (v->data);
+}
+
+
+void vector_initialise (vector* v, void* value)
+{
+    char* ptr = v->data;
+    int esize = v->elem_size;
+    int n = vector_size (v);
+    
+    int i;
+    for (i = 0; i < n; ++i)
+    {
+        memcpy (ptr, value, esize);
+        ptr += esize;
+    }
+}
+
+
+int vector_append (vector* v, void* elem)
+{
+    // Realloc a bigger chunk when the vector runs out of space.
+    if (v->next == v->data + v->chunk_size)
+    {
+        int old_chunk_size = v->chunk_size;
+        int n = max (v->elem_size, 2 * old_chunk_size);
+        
+        char* data = (char*) realloc (v->data, n);
+        if (data == NULL) return 1;
+        
+        v->data = data;
+        v->next = data + old_chunk_size;
+        v->chunk_size = n;
+    }
+    
+    memcpy ((void*)v->next, elem, v->elem_size);
+    v->next += v->elem_size; 
+}
+
+
+void* vector_ith (vector* v, int i)
+{
+    return (void*) (v->data + i*v->elem_size);
+}
+
+
+int vector_size (vector* v)
+{
+    return (v->next - v->data) / v->elem_size;
+}
+
+
+int vector_capacity (vector* v)
+{
+    return v->chunk_size / v->elem_size;
+}
diff --git a/Spear/Assets/Model/OBJ/cvector.h b/Spear/Assets/Model/OBJ/cvector.h
new file mode 100644
index 0000000..1d16c46
--- /dev/null
+++ b/Spear/Assets/Model/OBJ/cvector.h
@@ -0,0 +1,36 @@
+#ifndef _C_SPEAR_VECTOR_H
+#define _C_SPEAR_VECTOR_H
+
+typedef struct
+{
+    char* data;
+    char* next;
+    int   chunk_size;
+    int   elem_size;
+}
+vector;
+
+/// Construct a new vector.
+/// Returns non-zero on error.
+int vector_new (vector* v, int elem_size, int num_elems);
+
+/// Free the vector.
+void vector_free (vector* v);
+
+/// Initialise every position to the given value.
+void vector_initialise (vector* v, void* value);
+
+/// Append an element.
+/// Returns non-zero on error.
+int vector_append (vector* v, void* elem);
+
+/// Access the ith element.
+void* vector_ith (vector* v, int i);
+
+/// Return the number of elements in the vector.
+int vector_size (vector* v);
+
+/// Return the vector's capacity.
+int vector_capacity (vector* v);
+
+#endif // _C_SPEAR_VECTOR_H
diff --git a/Spear/Assets/Model/OBJ/test.cc b/Spear/Assets/Model/OBJ/test.cc
deleted file mode 100644
index 31e0e39..0000000
--- a/Spear/Assets/Model/OBJ/test.cc
+++ /dev/null
@@ -1,47 +0,0 @@
-#include "OBJ_load.h"
-#include <cstdio>
-
-
-int main (void)
-{
-    Model model;
-    OBJ_load ("/home/jeanne/assets/box.obj", 1, 1, &model);
-    
-    printf("Vertices:\n");
-    
-    for (size_t i = 0; i < model.numVertices; ++i)
-    {
-        vec3 v = model.vertices[i];
-        printf ("%f, %f, %f\n", v.x, v.y, v.z);
-    }
-    
-    printf("\nNormals:\n");
-    
-    for (size_t i = 0; i < model.numVertices; ++i)
-    {
-        vec3 n = model.normals[i];
-        printf ("%f, %f, %f\n", n.x, n.y, n.z);
-    }
-    
-    printf("\nTex coords:\n");
-    
-    for (size_t i = 0; i < model.numTexCoords; ++i)
-    {
-        texCoord tex = model.texCoords[i];
-        printf("%f, %f\n", tex.s, tex.t);
-    }
-    
-    printf("\nTriangles:\n");
-    
-    for (size_t i = 0; i < model.numTriangles; ++i)
-    {
-        triangle t = model.triangles[i];
-        printf ("%d, %d, %d - %d, %d, %d\n",
-            t.vertexIndices[0]+1,  t.vertexIndices[1]+1,  t.vertexIndices[2]+1,
-            t.textureIndices[0]+1, t.textureIndices[1]+1, t.textureIndices[2]+1);
-    }
-    
-    model_free (&model);
-    
-    return 0;
-}