From 5c8f366a3b5d7303bf73bd6d5d0af0459bac72a2 Mon Sep 17 00:00:00 2001 From: Tavian Barnes Date: Sat, 13 Jun 2009 20:47:24 +0000 Subject: Add camera type. --- libdimension/camera.c | 66 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 66 insertions(+) create mode 100644 libdimension/camera.c (limited to 'libdimension/camera.c') diff --git a/libdimension/camera.c b/libdimension/camera.c new file mode 100644 index 0000000..2052785 --- /dev/null +++ b/libdimension/camera.c @@ -0,0 +1,66 @@ +/************************************************************************* + * Copyright (C) 2008 Tavian Barnes * + * * + * 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 * + * . * + *************************************************************************/ + +#include "dimension.h" +#include /* For malloc */ + +dmnsn_camera * +dmnsn_new_camera() +{ + return malloc(sizeof(dmnsn_camera)); +} + +void +dmnsn_delete_camera(dmnsn_camera *camera) +{ + free(camera); +} + +/* Perspective camera */ + +static dmnsn_line dmnsn_perspective_camera_ray_fn(const dmnsn_canvas *canvas, + unsigned int x, + unsigned int y); + +dmnsn_camera * +dmnsn_new_perspective_camera() +{ + dmnsn_camera *camera = dmnsn_new_camera(); + camera->ray_fn = &dmnsn_perspective_camera_ray_fn; + return camera; +} + +void +dmnsn_delete_perspective_camera(dmnsn_camera *camera) +{ + dmnsn_delete_camera(camera); +} + +static dmnsn_line +dmnsn_perspective_camera_ray_fn(const dmnsn_canvas *canvas, + unsigned int x, unsigned int y) +{ + dmnsn_line l; + l.x0 = dmnsn_vector_construct(0.0, 0.0, 0.0); + l.n.x = ((double)x)/(canvas->x - 1) - 0.5; + l.n.y = ((double)y)/(canvas->y - 1) - 0.5; + l.n.z = 1.0; + return l; +} -- cgit v1.2.3