Add camera type.

2 files changed, 49 insertions, 1 deletions

diff --git a/libdimension/dimension/camera.h b/libdimension/dimension/camera.h
new file mode 100644
index 0000000..b1c4ebe
--- /dev/null
+++ b/libdimension/dimension/camera.h
@@ -0,0 +1,47 @@
+/*************************************************************************
+ * Copyright (C) 2008 Tavian Barnes <tavianator@gmail.com>               *
+ *                                                                       *
+ * This file is part of The Dimension Library.                           *
+ *                                                                       *
+ * The Dimension Library is free software; you can redistribute it and/  *
+ * or modify it under the terms of the GNU Lesser General Public License *
+ * as published by the Free Software Foundation; either version 3 of the *
+ * License, or (at your option) any later version.                       *
+ *                                                                       *
+ * The Dimension Library is distributed in the hope that it will be      *
+ * useful, but WITHOUT ANY WARRANTY; without even the implied warranty   *
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU  *
+ * Lesser General Public License for more details.                       *
+ *                                                                       *
+ * You should have received a copy of the GNU Lesser General Public      *
+ * License along with this program.  If not, see                         *
+ * <http://www.gnu.org/licenses/>.                                       *
+ *************************************************************************/
+
+#ifndef DIMENSION_CAMERA_H
+#define DIMENSION_CAMERA_H
+
+/*
+ * A camera.
+ */
+
+typedef dmnsn_line dmnsn_camera_ray_fn(const dmnsn_canvas *canvas,
+                                       unsigned int x, unsigned int y);
+
+typedef struct {
+  /* Generic pointer for camera info */
+  void *ptr;
+
+  /* Callback function */
+  dmnsn_camera_ray_fn *ray_fn;
+} dmnsn_camera;
+
+dmnsn_camera *dmnsn_new_camera();
+void dmnsn_delete_camera(dmnsn_camera *camera);
+
+/* A perspective camera, at the origin, looking at (0, 0, 1) */
+
+dmnsn_camera *dmnsn_new_perspective_camera();
+void dmnsn_delete_perspective_camera(dmnsn_camera *camera);
+
+#endif /* DIMENSION_CAMERA_H */
diff --git a/libdimension/dimension/scene.h b/libdimension/dimension/scene.h
index e075cdd..a6f2e5d 100644
--- a/libdimension/dimension/scene.h
+++ b/libdimension/dimension/scene.h
@@ -28,10 +28,11 @@
 typedef struct {
   dmnsn_color background;
   dmnsn_array *objects;
+  dmnsn_camera *camera;
   dmnsn_canvas *canvas;
 } dmnsn_scene;
 
-dmnsn_scene *dmnsn_new_scene(unsigned int x, unsigned int y);
+dmnsn_scene *dmnsn_new_scene();
 void dmnsn_delete_scene(dmnsn_scene *scene);
 
 void dmnsn_raytrace_scene(dmnsn_scene *scene);