Don't take a transformation matrix in dmnsn_new_perspective_camera().

2 files changed, 6 insertions, 6 deletions

diff --git a/libdimension/cameras.c b/libdimension/cameras.c
index 9e0642f..54c7e7f 100644
--- a/libdimension/cameras.c
+++ b/libdimension/cameras.c
@@ -30,9 +30,9 @@ static dmnsn_line dmnsn_perspective_camera_ray_fn(const dmnsn_camera *camera,
 
 /* Create a new perspective camera.  Rays are aimed from the origin to a screen
    located on the z = 1 frame, from (-0.5, -0.5) to (0.5, 0.5).  Rays are then
-   transformed by the matrix `trans'. */
+   transformed by the camera's transformation matrix. */
 dmnsn_camera *
-dmnsn_new_perspective_camera(dmnsn_matrix trans)
+dmnsn_new_perspective_camera()
 {
   dmnsn_matrix *ptr;
   dmnsn_camera *camera = dmnsn_new_camera();
@@ -43,11 +43,11 @@ dmnsn_new_perspective_camera(dmnsn_matrix trans)
       dmnsn_delete_camera(camera);
       return NULL;
     }
-    *ptr = trans;
-    camera->ptr = ptr;
+    *ptr = dmnsn_identity_matrix();
 
     camera->ray_fn  = &dmnsn_perspective_camera_ray_fn;
     camera->free_fn = &free;
+    camera->ptr     = ptr;
   }
   return camera;
 }
diff --git a/libdimension/dimension/cameras.h b/libdimension/dimension/cameras.h
index b135693..cc7ad4c 100644
--- a/libdimension/dimension/cameras.h
+++ b/libdimension/dimension/cameras.h
@@ -27,8 +27,8 @@
 
 /* A perspective camera, at the origin, looking at (0, 0, 1).  The feild of view
    is the section of the plane z = 1 from (-0.5, -0.5) to (0.5, 0.5).  Rays are
-   transformed by the transformation matrix `trans'. */
-dmnsn_camera *dmnsn_new_perspective_camera(dmnsn_matrix trans);
+   transformed by the camera's transformation matrix. */
+dmnsn_camera *dmnsn_new_perspective_camera();
 
 /* Get or set the transformation matrix */
 dmnsn_matrix dmnsn_get_perspective_camera_trans(const dmnsn_camera *camera);