Created File struture (markdown)

File-struture.md

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+# File structure
+
+**TODO: Update this info**
+
+It generates a C file containing for each mesh in the scene:
+
+  * an array of SVECTOR containing the vertices coordinates
+  * an array of SVECTOR containing the normals
+  * an array of SVECTOR containing the UV coordinates of the texture
+  * an array of CVECTOR containing the color of each vertex
+  * an array of int that describe the relation between the tri meshes
+  * a TMESH struct to ease access to those arrays
+  * declarations of the binary in memory
+  * a TIM_IMAGE struct ready to host the image data
+
+A few usefull stuff for manipulating the mesh :
+
+  * a MATRIX that will hold the mesh tranformations
+  * a VECTOR holding the object's location in world coordinates
+  * a SVECTOR holding the object's rotation in PSX angle units (1 == 4096)
+  * a flag isPrism for a pseudo-refraction effect. If 1, texture is the framebuffer draw area ( __WIP__ )
+  * a long holding p, the depth-cueing interpolation value used by the PSX
+  
+  For easy access to those, a MESH struct is defined as :
+  
+```c
+typedef struct MESH {  
+    TMESH   *    tmesh;
+    PRIM    *    index;
+    TIM_IMAGE *  tim;  
+    unsigned long * tim_data;
+    MATRIX  *    mat;
+    VECTOR  *    pos;
+    SVECTOR *    rot;
+    short   *    isRigidBody;
+    short   *    isStaticBody;
+    short   *    isPrism;
+    short   *    isAnim;
+    short   *    isActor;
+    short   *    isLevel;
+    short   *    isBG;
+    short   *    isSprite;
+    long    *    p;
+    long    *    OTz;
+    BODY    *    body;
+    VANIM   *    anim;
+    struct NODE   *    node;
+    VECTOR       pos2D;
+    } MESH;
+
+```
+
+## TMESH struct :
+  
+From `libgte.h`  :
+
+```c
+typedef struct {
+        SVECTOR         *v;                     /*shared vertices*/
+        SVECTOR         *n;                     /*shared normals*/
+        SVECTOR         *u;                     /*shared texture addresses*/
+        CVECTOR         *c;                     /*shared colors*/
+        u_long          len;                    /*mesh length(=#vertex)*/
+} TMESH;
+```