Add initial prototype.

3-mid/physics/implement/box2d/source/c/box2d-space.h

@@ -0,0 +1,75 @@
+#ifndef C_BOX2D_SPACE_H
+#define C_BOX2D_SPACE_H
+
+
+#include "box2d.h"
+#include "box2d-object.h"
+#include "box2d-joint.h"
+
+
+
+extern "C"
+{
+  struct Space;
+
+
+  struct Space*      b2d_new_Space ();
+  void               b2d_free_Space       (Space*   Self);
+
+  void               b2d_Space_add_Object (Space*   Self,    Object*     the_Object);
+  void               b2d_Space_rid_Object (Space*   Self,    Object*     the_Object);
+
+  void               b2d_Space_add_Joint  (Space*   Self,    Joint*      the_Joint);
+  void               b2d_Space_rid_Joint  (Space*   Self,    Joint*      the_Joint);
+
+
+  struct b2Joint;
+  void*              b2d_b2Joint_user_Data (b2Joint*   the_Joint);
+
+
+  struct joint_Cursor
+  {
+    b2Joint*   Joint;
+  };
+
+  joint_Cursor       b2d_Space_first_Joint    (Space*          Self);
+  void               b2d_Space_next_Joint    (joint_Cursor*   Cursor);
+  b2Joint*           b2d_Space_joint_Element (joint_Cursor*   Cursor);
+
+
+  void               b2d_Space_Gravity_is (Space*   Self,    Vector_3*   Now);
+  void               b2d_Space_evolve     (Space*   Self,    float       By);
+
+
+
+  //  Ray Casting
+  //
+  struct b2d_ray_Collision
+  {
+      const Object*    near_Object;
+      Real             hit_Fraction;
+      Vector_3         Normal_world;
+      Vector_3         Site_world;
+  };
+
+  b2d_ray_Collision      b2d_Space_cast_Ray (Space*   Self,    Vector_3*   From,
+                                                               Vector_3*   To);
+
+  //  Collisions
+  //
+
+  struct b2d_Contact
+  {
+    Object*          Object_A;
+    Object*          Object_B;
+    Vector_3         Site;
+  };
+
+  int                b2d_space_contact_Count (Space*   Self);
+  b2d_Contact        b2d_space_Contact       (Space*   Self,   int   contact_Id);
+
+} // extern "C"
+
+
+#endif
+